LT3060ITS8#TRMPBF [Linear]
LT3060 - 45V VIN, Micropower, Low Noise, 100mA Low Dropout, Linear Regulator; Package: SOT; Pins: 8; Temperature Range: -40°C to 85°C;型号: | LT3060ITS8#TRMPBF |
厂家: | Linear |
描述: | LT3060 - 45V VIN, Micropower, Low Noise, 100mA Low Dropout, Linear Regulator; Package: SOT; Pins: 8; Temperature Range: -40°C to 85°C 光电二极管 输出元件 调节器 |
文件: | 总26页 (文件大小:441K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LT3060 Series
45V V , Micropower,
IN
Low Noise, 100mA Low
Dropout, Linear Regulator
FeaTures
DescripTion
The LT®3060 series are micropower, low dropout voltage
(LDO) linear regulators that operate over a 1.6V to 45V
input supply range. The devices supply 100mA of output
current with a typical dropout voltage of 300mV. A single
external capacitor provides programmable low noise
reference performance and output soft-start functional-
ity. The LT3060’s quiescent current is merely 40μA and
provides fast transient response with a minimum 2.2μF
output capacitor. In shutdown, quiescent current is less
than 1μA and the reference soft-start capacitor is reset.
n
Input Voltage Range: 1.6V to 45V
n
Output Current: 100mA
n
Quiescent Current: 40µA
n
Dropout Voltage: 300mV
n
Low Noise: 30µV
(10Hz to 100kHz)
REF
RMS
n
n
Adjustable Output: V
= 600mV
Fixed Output Voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.3V,
5V, 15V
n
n
Output Tolerance: 2ꢀ Over Line, Load and
Temperature
Single Capacitor Soft-Starts Reference and Lowers
Output Noise
Shutdown Current: < 1µA
Reverse Battery Protection
The LT3060 regulators optimize stability and transient
response with low ESR, ceramic output capacitors.
The regulators do not require the addition of ESR as is
common with other regulators.
n
n
n
n
n
Current Limit Foldback Protection
Thermal Limit Protection
Internal protection circuitry includes reverse-battery
protection, reverse-output protection, reverse-current
protection, current limit with foldback and thermal
shutdown. The LT3060 series are available in fixed output
voltages of 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V and 15V, and as
anadjustablevoltageregulatorwithanoutputvoltagerange
fromthe600mVreferenceto44.5V.TheLT3060regulators
are offered in the thermally enhanced 8-lead TSOT-23 and
8-lead (2mm × 2mm × 0.75mm) DFN packages.
8-Lead 2mm × 2mm × 0.75mmDFN and 8-Lead
™
ThinSOT Packages
applicaTions
n
Battery-Powered Systems
n
Automotive Power Supplies
n
Industrial Power Supplies
n
Avionic Power Supplies
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
n
Portable Instruments
Typical applicaTion
Dropout Voltage
350
T
= 25°C
J
2.5V Low Noise Regulator
300
250
200
150
100
50
V
OUT
IN
OUT
2.5V AT 100mA
30µV NOISE
V
RMS
IN
1µF
LT3060-2.5
C
FF
10nF
3V TO
45V
10µF
SHDN
ADJ
GND REF/BYP
10nF
3060 TA01
0
0
10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
3060 TA02
3060fc
1
For more information www.linear.com/LT3060
LT3060 Series
absoluTe MaxiMuM raTings (Note 1)
IN Pin Voltage ........................................................ 50V
OUT Pin Voltage..................................................... 50V
Input-to-Output Differential Voltage (Note 2)......... 50V
ADJ Pin Voltage ..................................................... 50V
SHDN Pin Voltage .................................................. 50V
REF/BYP Pin Voltage....................................... – 0.3V, 1V
Output Short-Circuit Duration.......................... Indefinite
Operating Junction Temperature (Notes 3, 5, 13)
E-, I-Grades .......................................–40°C to 125°C
MP-Grade .......................................... –55°C to 150°C
H-Grade ............................................. –40°C to 150°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (TS8 Soldering, 10 sec)...........300°C
pin conFiguraTion
TOP VIEW
TOP VIEW
1
2
3
4
8
7
6
5
GND
SHDN
IN
REF/BYP
ADJ
SHDN 1
GND 2
GND 3
GND 4
8 REF/BYP
7 ADJ
6 OUT
5 IN
9
GND
OUT
OUT
IN
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
DC PACKAGE
8-LEAD (2mm × 2mm) PLASTIC DFN
T
= 150°C, θ = 57°C/W TO 67°C/W*, θ = 25°C/W
JMAX
JA
JC
T
= 125°C, θ = 48°C/W TO 60°C/W*, θ = 20°C/W
JA JC
JMAX
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
* SEE APPLICATIONS INFORMATION SECTION
orDer inForMaTion
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
LDTD
LDTD
LFVT
PACKAGE DESCRIPTION
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
LT3060EDC#PBF
LT3060EDC#TRPBF
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
8-Lead (2mm × 2mm) Plastic DFN
LT3060IDC#PBF
LT3060IDC#TRPBF
LT3060EDC-1.2#PBF
LT3060IDC-1.2#PBF
LT3060EDC-1.5#PBF
LT3060IDC-1.5#PBF
LT3060EDC-1.8#PBF
LT3060IDC-1.8#PBF
LT3060EDC-2.5#PBF
LT3060IDC-2.5#PBF
LT3060EDC-3.3#PBF
LT3060IDC-3.3#PBF
LT3060EDC-5#PBF
LT3060IDC-5#PBF
LT3060EDC-15#PBF
LT3060IDC-15#PBF
LT3060EDC-1.2#TRPBF
LT3060IDC-1.2#TRPBF
LT3060EDC-1.5#TRPBF
LT3060IDC-1.5#TRPBF
LT3060EDC-1.8#TRPBF
LT3060IDC-1.8#TRPBF
LT3060EDC-2.5#TRPBF
LT3060IDC-2.5#TRPBF
LT3060EDC-3.3#TRPBF
LT3060IDC-3.3#TRPBF
LT3060EDC-5#TRPBF
LT3060IDC-5#TRPBF
LT3060EDC-15#TRPBF
LT3060IDC-15#TRPBF
LFVT
LFVV
LFVV
LFVW
LFVW
LFVX
LFVX
LFVY
LFVY
LFVZ
LFVZ
LGSK
LGSK
3060fc
2
For more information www.linear.com/LT3060
LT3060 Series
orDer inForMaTion
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
LTDTF
PACKAGE DESCRIPTION
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
8-Lead Plastic ThinSOT
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
–40°C to 150°C
LT3060ETS8#PBF
LT3060ETS8#TRPBF
LT3060ITS8#TRPBF
LT3060MPTS8#TRPBF
LT3060HTS8#TRPBF
LT3060ETS8-1.2#TRPBF
LT3060ITS8-1.2#TRPBF
LT3060ITS8#PBF
LTDTF
LT3060MPTS8#PBF
LT3060HTS8#PBF
LTDTF
LTDTF
LT3060ETS8-1.2#PBF
LT3060ITS8-1.2#PBF
LT3060MPTS8-1.2#PBF
LT3060HTS8-1.2#PBF
LT3060ETS8-1.5#PBF
LT3060ITS8-1.5#PBF
LT3060MPTS8-1.5#PBF
LT3060HTS8-1.5#PBF
LT3060ETS8-1.8#PBF
LT3060ITS8-1.8#PBF
LT3060MPTS8-1.8#PBF
LT3060HTS8-1.8#PBF
LT3060ETS8-2.5#PBF
LT3060ITS8-2.5#PBF
LT3060MPTS8-2.5#PBF
LT3060HTS8-2.5#PBF
LT3060ETS8-3.3#PBF
LT3060ITS8-3.3#PBF
LT3060MPTS8-3.3#PBF
LT3060HTS8-3.3#PBF
LT3060ETS8-5#PBF
LT3060ITS8-5#PBF
LTFWB
LTFWB
LT3060MPTS8-1.2#TRPBF LTFWB
LT3060HTS8-1.2#TRPBF
LT3060ETS8-1.5#TRPBF
LT3060ITS8-1.5#TRPBF
LTFWB
LTFWC
LTFWC
LT3060MPTS8-1.5#TRPBF LTFWC
LT3060HTS8-1.5#TRPBF
LT3060ETS8-1.8#TRPBF
LT3060ITS8-1.8#TRPBF
LTFWC
LTFWD
LTFWD
LT3060MPTS8-1.8#TRPBF LTFWD
LT3060HTS8-1.8#TRPBF
LT3060ETS8-2.5#TRPBF
LT3060ITS8-2.5#TRPBF
LTFWD
LTFWF
LTFWF
LT3060MPTS8-2.5#TRPBF LTFWF
LT3060HTS8-2.5#TRPBF
LT3060ETS8-3.3#TRPBF
LT3060ITS8-3.3#TRPBF
LTFWF
LTFWG
LTFWG
LT3060MPTS8-3.3#TRPBF LTFWG
LT3060HTS8-3.3#TRPBF
LT3060ETS8-5#TRPBF
LT3060ITS8-5#TRPBF
LT3060MPTS8-5#TRPBF
LT3060HTS8-5#TRPBF
LT3060ETS8-15#TRPBF
LT3060ITS8-15#TRPBF
LT3060MPTS8-15#TRPBF
LT3060HTS8-15#TRPBF
LTFWG
LTFWH
LTFWH
LTFWH
LTFWH
LTGSM
LTGSM
LTGSM
LTGSM
LT3060MPTS8-5#PBF
LT3060HTS8-5#PBF
LT3060ETS8-15#PBF
LT3060ITS8-15#PBF
LT3060MPTS8-15#PBF
LT3060HTS8-15#PBF
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
3060fc
3
For more information www.linear.com/LT3060
LT3060 Series
elecTrical characTerisTics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 3)
PARAMETER
CONDITIONS
= 100mA
MIN
TYP
MAX
UNITS
l
Minimum Input Voltage
(Notes 4, 12)
I
1.6
2.1
V
LOAD
Regulated Output Voltage
(Note 5)
LT3060-1.2: V = 2.1V, I
= 1mA
1.2
1.2
1.2
V
V
V
1.188
1.176
1.170
1.212
1.224
1.224
IN
LOAD
l
l
2.1V < V < 45V, 1mA < I
< 100mA (E-, I-Grades)
< 100mA (MP-, H-Grades)
IN
LOAD
LOAD
2.1V < V < 45V, 1mA < I
IN
LT3060-1.5: V = 2.1V, I
= 1mA
1.5
1.5
1.5
V
V
V
1.485
1.470
1.463
1.515
1.530
1.530
IN
LOAD
l
l
2.1V < V < 45V, 1mA < I
< 100mA (E-, I-Grades)
< 100mA (MP-, H-Grades)
IN
LOAD
LOAD
2.1V < V < 45V, 1mA < I
IN
LT3060-1.8: V = 2.35V, I
= 1mA
1.8
1.8
1.8
V
V
V
1.782
1.764
1.755
1.818
1.836
1.836
IN
LOAD
l
l
2.35V < V < 45V, 1mA < I
< 100mA (E-, I-Grades)
LOAD
LOAD
IN
2.35V < V < 45V, 1mA < I
< 100mA (MP-, H-Grades)
IN
LT3060-2.5: V = 3.05V, I
= 1mA
2.5
2.5
2.5
V
V
V
2.475
2.450
2.438
2.525
2.550
2.550
IN
LOAD
l
l
3.05V < V < 45V, 1mA < I
< 100mA (E-, I-Grades)
< 100mA (MP-, H-Grades)
IN
LOAD
LOAD
3.05V < V < 45V, 1mA < I
IN
LT3060-3.3: V = 3.85V, I
= 1mA
3.3
3.3
3.3
V
V
V
3.267
3.234
3.218
3.333
3.366
3.366
IN
LOAD
l
l
3.85V < V < 45V, 1mA < I
< 100mA (E-, I-Grades)
< 100mA (MP-, H-Grades)
IN
LOAD
LOAD
3.85V < V < 45V, 1mA < I
IN
LT3060-5:
LT3060-15:
LT3060:
V
= 5.55V, I
= 1mA
5
5
5
V
V
V
4.950
4.900
4.875
5.050
5.100
5.100
IN
LOAD
l
l
5.55V < V < 45V, 1mA < I
< 100mA (E-, I-Grades)
IN
IN
LOAD
LOAD
5.55V < V < 45V, 1mA < I
< 100mA (MP-, H-Grades)
V
= 15.55V, I
= 1mA
LOAD
15
15
15
V
V
V
14.85
14.70
14.63
15.15
15.30
15.30
IN
l
l
15.55V < V < 45V, 1mA < I
< 100mA (E-, I-Grades)
LOAD
< 100mA (MP-, H-Grades)
LOAD
IN
IN
15.55V < V < 45V, 1mA < I
ADJ Pin Voltage
(Notes 4, 5)
V
= 2.1V, I
= 1mA
594
588
585
600
600
600
606
612
612
mV
mV
mV
IN
LOAD
l
l
2.1V < V < 45V, 1mA < I
< 100mA (E-, I-Grades)
< 100mA (MP-, H-Grades)
IN
IN
LOAD
LOAD
2.1V < V < 45V, 1mA < I
l
l
Line Regulation
0.9
3.5
7
mV
mV
mV
mV
mV
mV
mV
mV
LT3060-1.2: ΔV = 2.1V to 45V, I
= 1mA
= 1mA
(E-, I-Grades)
IN
LOAD
LOAD
ΔV = 2.1V to 45V, I
(MP-, H-Grades)
IN
l
l
1
4.2
8
LT3060-1.5: ΔV = 2.1V to 45V, I
= 1mA
= 1mA
(E-, I-Grades)
(MP-, H-Grades)
IN
LOAD
LOAD
ΔV = 2.1V to 45V, I
IN
l
l
1.1
1.2
1.3
1.5
2.2
0.6
4.5
12
LT3060-1.8: ΔV = 2.35V to 45V, I
= 1mA
= 1mA
(E-, I-Grades)
(MP-, H-Grades)
IN
LOAD
LOAD
ΔV = 2.35V to 45V, I
IN
l
l
5.4
15
LT3060-2.5: ΔV = 3.05V to 45V, I
= 1mA
= 1mA
(E-, I-Grades)
(MP-, H-Grades)
IN
LOAD
LOAD
ΔV = 3.05V to 45V, I
IN
l
l
7
19
LT3060-3.3: ΔV = 3.85V to 45V, I
= 1mA
= 1mA
(E-, I-Grades)
(MP-, H-Grades)
IN
LOAD
LOAD
ΔV = 3.85V to 45V, I
IN
l
l
8.5
25
LT3060-5: ΔV = 5.55V to 45V, I
= 1mA
= 1mA
(E-, I-Grades)
(MP-, H-Grades)
IN
LOAD
LOAD
ΔV = 5.55V to 45V, I
IN
l
l
22
55
LT3060-15: ΔV = 15.55V to 45V, I
= 1mA
= 1mA
(E-, I-Grades)
(MP-, H-Grades)
IN
LOAD
LOAD
ΔV = 15.55V to 45V, I
IN
l
l
3.5
4
LT3060:
(Note 4)
ΔV = 2.1V to 45V, I
IN
= 1mA
= 1mA
(E-, I-Grades)
(MP-, H-Grades)
IN
LOAD
LOAD
ΔV = 2.1V to 45V, I
3060fc
4
For more information www.linear.com/LT3060
LT3060 Series
elecTrical characTerisTics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
l
l
Load Regulation
(Note 15)
LT3060-1.2: V = 2.1V, I
= 1mA to 100mA
= 1mA to 100mA
(E-, I-Grades)
(MP-, H-Grades)
2.4
10
18
mV
mV
IN
LOAD
LOAD
V
= 2.1V, I
IN
l
l
LT3060-1.5: V = 2.1V, I
= 1mA to 100mA
= 1mA to 100mA
(E-, I-Grades)
2.5
2.6
2.8
3.1
3.7
7
12
22
mV
mV
IN
LOAD
LOAD
V
= 2.1V, I
(MP-, H-Grades)
IN
l
l
LT3060-1.8: V = 2.35V, I
= 1mA to 100mA
= 1mA to 100mA
(E-, I-Grades)
(MP-, H-Grades)
14
27
mV
mV
IN
IN
LOAD
LOAD
V
= 2.35V, I
l
l
LT3060-2.5: V = 3.05V, I
= 1mA to 100mA
= 1mA to 100mA
(E-, I-Grades)
(MP-, H-Grades)
19
37
mV
mV
IN
IN
LOAD
LOAD
V
= 3.05V, I
l
l
LT3060-3.3: V = 3.85V, I
= 1mA to 100mA
= 1mA to 100mA
(E-, I-Grades)
(MP-, H-Grades)
24
49
mV
mV
IN
IN
LOAD
LOAD
V
= 3.85V, I
l
l
LT3060-5:
V
V
= 5.55V, I
= 5.55V, I
= 1mA to 100mA
= 1mA to 100mA
(E-, I-Grades)
(MP-, H-Grades)
35
75
mV
mV
IN
IN
LOAD
LOAD
l
l
LT3060-15:
V
V
= 15.55V, I
= 15.55V, I
= 1mA to 100mA
= 1mA to 100mA
(E-, I-Grades)
(MP-, H-Grades)
100
225
mV
mV
IN
IN
LOAD
LOAD
l
l
LT3060:
(Note 4)
V
V
= 2.1V, I
= 2.1V, I
= 1mA to 100mA
= 1mA to 100mA
(E-, I-Grades)
(MP-, H-Grades)
0.2
75
4
9
mV
mV
IN
IN
LOAD
LOAD
Dropout Voltage
I
I
= 1mA
= 1mA
110
180
mV
mV
LOAD
LOAD
l
l
l
l
V
= V
IN
OUT(NOMINAL)
(Notes 6, 7)
I
I
= 10mA
= 10mA
150
240
300
200
300
mV
mV
LOAD
LOAD
I
I
= 50mA (Note 14)
= 50mA (Note 14)
280
410
mV
mV
LOAD
LOAD
I
I
= 100mA (Note 14)
= 100mA (Note 14)
350
510
mV
mV
LOAD
LOAD
l
l
l
l
l
GND Pin Current
IN
0.55V
I
I
I
I
I
= 0µA
40
60
160
0.8
2
80
100
350
1.8
4
µA
µA
LOAD
LOAD
LOAD
LOAD
LOAD
V
= V
+
OUT(NOMINAL)
= 1mA
= 10mA
= 50mA
= 100mA
µA
mA
mA
(Notes 6, 8)
Quiescent Current in
Shutdown
V
= 45V, V
= 0V
SHDN
0.3
15
30
1
µA
IN
l
ADJ Pin Bias Current
(Note 9)
V
= 2.1V
60
nA
IN
Output Voltage Noise
C
V
= 10µF, I
= 600mV, BW = 10Hz to 100kHz
= 100mA, C
= 0.01µF
µV
RMS
OUT
OUT
LOAD
BYP
l
l
Shutdown Threshold
V
OUT
V
OUT
= Off to On
= On to Off
0.8
0.7
1.5
V
V
0.3
l
l
SHDN Pin Current
V
V
= 0V
1
3
µA
µA
SHDN
SHDN
(Note 10)
= 45V
0.9
79
77
75
73
70
67
60
85
200
Ripple Rejection
64
62
60
58
55
52
45
70
dB
dB
dB
dB
dB
dB
dB
dB
LT3060-1.2: V = 2.7V (Avg)
IN
V
= 0.5V
,
RIPPLE P-P
= 120Hz,
RIPPLE
LT3060-1.5: V = 3V (Avg)
IN
f
I
LT3060-1.8: V = 3.3V (Avg)
= 100mA
IN
LOAD
LT3060-2.5: V = 4V (Avg)
IN
LT3060-3.3: V = 4.8V (Avg)
IN
LT3060-5:
V
= 6.5V (Avg)
IN
IN
LT3060-15: V = 16.5V (Avg)
LT3060:
V
= 2.1V (Avg) (Note 4)
IN
Current Limit
V
V
= 7V, V
= V
= 0
mA
mA
IN
IN
OUT
l
+ 1V (Notes 6, 12), ΔV
= –5ꢀ
110
OUT(NOMINAL)
OUT
3060fc
5
For more information www.linear.com/LT3060
LT3060 Series
elecTrical characTerisTics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 3)
PARAMETER
CONDITIONS
= –45V, V
MIN
TYP
MAX
UNITS
l
Input Reverse Leakage
Current
V
= 0
OUT
300
µA
IN
Reverse Output Current
(Note 11)
5
5
10
10
10
10
10
10
10
10
µA
µA
µA
µA
µA
µA
µA
µA
LT3060-1.2: V
LT3060-1.5: V
LT3060-1.8: V
LT3060-2.5: V
LT3060-3.3: V
= 1.2V, V = 0V
IN
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
= 1.5V, V = 0V
IN
5
= 1.8V, V = 0V
IN
5
= 2.5V, V = 0V
IN
5
= 3.3V, V = 0V
IN
5
LT3060-5:
LT3060-15: V
LT3060:
V
= 5V, V = 0V
IN
5
= 15V, V = 0V
IN
0.2
V
= 1.2V, V = 0V
IN
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Absolute maximum input-to-output differential voltage is not
achievable with all combinations of rated IN pin and OUT pin voltages.
With the IN pin at 50V, the OUT pin may not be pulled below 0V. The total
measured voltage from IN to OUT must not exceed 50V. If OUT is above
ground, do not actively pull OUT above IN by more than 40V.
Note 7: Dropout voltage is the minimum input-to-output voltage
differential needed to maintain regulation at a specified output current.
In dropout, the output voltage equals: (V – V ). For the
LT3060, LT3060-1.2, LT3060-1.5 and LT3060-1.8, dropout is limited
by the minimum input specification under some output voltages and
load conditions. See the Minimum Input Voltage curve in the Typical
Performance Characteristics section.
IN
DROPOUT
Note 8: GND pin current is tested with V = V
+ 0.55V and a
OUT(NOMINAL)
IN
current source load. GND pin current will increase in dropout. See GND pin
current curves in the Typical Performance Characteristics section.
Note 3: The LT3060 regulators are tested and specified under pulse load
conditions such that T ≅ T . The LT3060E regulators are 100ꢀ tested
J
A
Note 9: ADJ pin bias current flows out of the ADJ pin.
Note 10: SHDN pin current flows into the SHDN pin.
Note 11: Reverse output current is tested with the IN pin grounded and the
OUT pin forced to the rated output voltage. This current flows into the OUT
pin and out of the GND pin.
at T = 25°C. Performance at –40°C to 125°C is assured by design,
A
characterization and correlation with statistical process controls. The
LT3060I regulators are guaranteed over the full –40°C to 125°C operating
junction temperature range. The LT3060MP regulators are 100ꢀ tested
over the –55°C to 150°C operating junction temperature range. The
LT3060H regulators are 100ꢀ tested at the 150°C operating junction
temperature. High junction temperatures degrade operating lifetimes.
Operating lifetime is derated at junction temperatures greater than 125°C.
Note 12: To satisfy requirements for minimum input voltage, current
limit is tested at V = V
+ 1V or V = 2.1V, whichever is
IN
OUT(NOMINAL)
IN
greater.
Note 4: The LT3060 adjustable version is tested and specified for these
conditions with the ADJ connected to the OUT pin.
Note 13: This IC includes overtemperature protection that protects the
device during momentary overload conditions. Junction temperature
will exceed 125°C (LT3060E, LT3060I) or 150°C (LT3060MP, LT3060H)
when overtemperature circuitry is active. Continuous operation above the
specified maximum junction temperature may impair device reliability.
Note 5: Maximum junction temperature limits operating conditions. The
regulated output voltage specification does not apply for all possible
combinations of input voltage and output current. Limit the output current
range if operating at the maximum input-to-output voltage differential.
Limit the input-to-output voltage differential if operating at maximum
output current. Current limit foldback will limit the maximum output
current as a function of input-to-output voltage. See Current Limit vs
Note 14: The dropout voltage specification is guaranteed for the DFN
package. The dropout voltage specification for high output currents cannot
be guaranteed for the TS8 package due to production test limitations.
Note 15: The load regulation specification is guaranteed for the fixed
voltage options in the DFN package. The load regulation specification
cannot be guaranteed for the fixed voltage options in the TS8 package due
to production test limitations. The TS8 packages are tested similarly to the
LT3060 adjustable version with the ADJ connected to the OUT pin.
V
– V
in the Typical Performance Characteristics section.
IN
OUT
Note 6: To satisfy minimum input voltage requirements, the LT3060
adjustable version is tested and specified for these conditions with an
external resistor divider (bottom 115k, top 365k) for an output voltage of
2.5V. The external resistor divider adds 5µA of DC load on the output. This
external current is not factored into GND pin current.
3060fc
6
For more information www.linear.com/LT3060
LT3060 Series
TA = 25°C, unless otherwise noted.
Typical perForMance characTerisTics
Typical Dropout Voltage
Guaranteed Dropout Voltage
Dropout Voltage
550
500
450
400
350
300
250
200
150
100
50
550
500
450
400
350
300
250
200
150
100
50
550
500
450
400
350
300
250
200
150
100
50
= TEST POINTS
I
= 100mA
L
T ≤ 150°C
J
I
= 50mA
= 10mA
L
L
T = 125°C
J
T ≤ 25°C
J
I
T = 25°C
J
I
= 1mA
L
0
0
0
0
10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
0
10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
–75 –50 –25
0
25 50 75 100 125 150 175
TEMPERATURE (°C)
3060 G01
3060 G02
3060 G03
Quiescent Current
LT3060-1.2 Output Voltage
LT3060-1.5 Output Voltage
1.224
1.220
1.216
1.212
1.208
1.204
1.200
1.196
1.530
1.525
1.520
1.515
1.510
1.505
1.500
1.495
80
70
60
50
40
30
20
10
0
I
= 1mA
I = 1mA
L
V
= 6V, V
= V
SHDN IN
L
IN
L
R
= ∞ (120k FOR LT3060)
I
= 0 (5µA FOR LT3060)
L
LT3060-1.2/-1.5/-1.8/-2.5/-3.3/-5
LT3060
1.192
1.188
1.184
1.490
1.485
1.480
1.180
1.176
1.475
1.470
V
= 0V
SHDN
–75 –50 –25
0
25 50 75 100 125 150 175
–75 –50 –25
0
25 50 75 100 125 150 175
–75 –50 –25
0
25 50 75 100 125 150 175
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
3060 G04
3060 G05
3060 G06
LT3060-1.8 Output Voltage
LT3060-2.5 Output Voltage
LT3060-3.3 Output Voltage
1.836
1.830
1.824
1.818
1.812
1.806
1.800
1.794
2.55
2.54
2.53
2.52
2.51
2.50
2.49
2.48
2.47
2.46
2.45
3.366
3.355
3.344
3.333
3.322
3.311
3.300
3.289
I
= 1mA
I
= 1mA
I = 1mA
L
L
L
1.788
1.782
1.776
3.278
3.267
3.256
1.770
1.764
3.245
3.234
–75 –50 –25
0
25 50 75 100 125 150 175
–75 –50 –25
0
25 50 75 100 125 150 175
–75 –50 –25
0
25 50 75 100 125 150 175
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
3060 G07
3060 G08
3060 G09
3060fc
7
For more information www.linear.com/LT3060
LT3060 Series
TA = 25°C, unless otherwise noted.
Typical perForMance characTerisTics
LT3060-5 Output Voltage
LT3060-15 Output Voltage
LT3060 ADJ Pin Voltage
15.30
5.10
5.08
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.92
4.90
0.612
I
= 1mA
I
= 1mA
IN
L
L
I
L
= 1mA
0.610
0.608
0.606
0.604
0.602
0.600
0.598
15.25
15.20
15.15
15.10
15.05
15.00
14.95
14.90
14.85
14.80
14.75
14.70
V
= 2.1V
0.596
0.594
0.592
0.590
0.588
–75 –50 –25
0
25 50 75 100 125 150 175
–75 –50 –25
0
25 50 75 100 125 150 175
–75 –50 –25
0
25 50 75 100 125 150 175
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
3060 G11
3060 G10
3060 G10a
LT3060-1.5 Quiescent Current
LT3060-1.8 Quiescent Current
LT3060-1.2 Quiescent Current
200
175
150
125
100
75
200
175
150
125
100
75
200
175
150
125
100
75
T = 25°C
J
T = 25°C
J
T = 25°C
J
R
V
= ∞
OUT
R
V
= ∞
L
R
V
= ∞
OUT
L
L
= 1.2V
= 1.5V
OUT
= 1.8V
V
= V
IN
V
SHDN
= V
IN
V
= V
IN
SHDN
SHDN
50
50
50
25
25
25
V
= 0V
6
V
= 0V
6
V
= 0V
6
SHDN
SHDN
SHDN
0
0
0
0
1
2
3
4
5
7
8
9
10
0
1
2
3
4
5
7
8
9
10
0
1
2
3
4
5
7
8
9
10
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
3060 G12
3060 G13
3060 G14
LT3060-2.5 Quiescent Current
LT3060-5 Quiescent Current
LT3060-3.3 Quiescent Current
200
175
150
125
100
75
200
175
150
125
100
75
200
175
150
125
100
75
T = 25°C
J
T = 25°C
J
T = 25°C
J
R
V
= ∞
OUT
R
V
= ∞
OUT
R
V
= ∞
OUT
L
L
L
= 5V
= 3.3V
= 2.5V
V
= V
IN
V
= V
IN
V
SHDN
= V
IN
SHDN
SHDN
50
50
50
25
25
25
V
= 0V
8
V
= 0V
7
V
= 0V
6
SHDN
SHDN
SHDN
0
0
0
0
1
2
3
4
5
6
7
9
10
0
1
2
3
4
5
6
8
9
10
0
1
2
3
4
5
7
8
9
10
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
3060 G17
3060 G16
3060 G15
3060fc
8
For more information www.linear.com/LT3060
LT3060 Series
TA = 25°C, unless otherwise noted.
Typical perForMance characTerisTics
LT3060-1.2 GND Pin Current
LT3060-15 Quiescent Current
LT3060 Quiescent Current
200
175
150
125
100
75
80
70
60
50
40
30
20
10
0
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
T = 25°C
T = 25°C
J
T = 25°C
OUT
SHDN
J
J
R
= 120k
= 0.6V
R
V
= ∞
OUT
*FOR V
V
= 1.2V
= V
L
OUT
L
V
= 15V
IN
R
L
= 12Ω
L
I
= 100mA*
V
= V
IN
V
= V
IN
SHDN
SHDN
R
L
L
= 24Ω
I
= 50mA*
50
R
L
= 1.2k
L
R
L
= 120Ω
L
I
= 1mA*
25
I
= 10mA*
V
= 0V
V
= 0
SHDN
SHDN
0
0
0
5
15 20 25 30 35 40 45
INPUT VOLTAGE (V)
0
5
10 15 20 25 30 35 40 45
INPUT VOLTAGE (V)
0
1
2
3
4
5
6
7
8
9
10
INPUT VOLTAGE (V)
3060 G17a
3060 G19
3060 G18
LT3060-1.5 GND Pin Current
LT3060-2.5 GND Pin Current
LT3060-1.8 GND Pin Current
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
2.50
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
T = 25°C
OUT
SHDN
T = 25°C
OUT
SHDN
T = 25°C
J
OUT
SHDN
J
J
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
*FOR V
V
= 1.5V
*FOR V
V
= 1.8V
= V
IN
*FOR V
V
= 2.5V
= V
= V
IN
IN
R
L
= 18Ω
R
L
= 25Ω
R
L
= 15Ω
L
L
L
I
= 100mA*
I
= 100mA*
I
= 100mA*
R
L
= 50Ω
L
R
L
= 30Ω
R = 36Ω
L
L
I
= 50mA*
I
= 50mA*
I
= 50mA*
L
R
L
= 1.5k
R = 1.8k
L
I = 1mA*
L
L
R
L
= 2.5k
L
R
L
= 250Ω
R
L
= 150Ω
R
L
= 180Ω
L
L
L
I
= 1mA*
I
= 1mA*
I
= 10mA*
I
= 10mA*
I
= 10mA*
0
0
0
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
3060 G20
3060 G21
3060 G22
LT3060-5 GND Pin Current
LT3060-15 GND Pin Current
LT3060-3.3 GND Pin Current
2.50
2.25
2.00
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
T = 25°C
J
T = 25°C
OUT
SHDN
T = 25°C
J
= 5V
OUT
J
R = 150Ω
L
I = 100mA*
L
*FOR V
= 15V
OUT
*FOR V
V
= 3.3V
*FOR V
V
= V
IN
SHDN
= V
V
= V
SHDN IN
IN
1.75
1.50
1.25
R
L
= 33Ω
R = 50Ω
L
I = 100mA*
L
L
I
= 100mA*
R
L
= 300Ω
L
I
= 50mA*
1.00
0.75
0.50
0.25
R
L
= 100Ω
R
L
L
= 66Ω
L
I
= 50mA*
I
= 50mA*
R
L
= 5k
L
R
L
= 15k
L
R
L
= 3.3k
L
I
= 1mA*
R
L
= 1.5k
R
L
= 500Ω
I
= 1mA*
L
R
L
L
= 330Ω
L
I
= 1mA*
I
= 10mA*
I
= 10mA*
I
= 10mA*
0
0
0
0
5
15 20 25 30 35 40 45
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
3060 G24a
3060 G23
3060 G24
3060fc
9
For more information www.linear.com/LT3060
LT3060 Series
TA = 25°C, unless otherwise noted.
Typical perForMance characTerisTics
LT3060 GND Pin Current
GND Pin Current vs ILOAD
SHDN Pin Threshold
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
T = 25°C
V
= V
+ 1V
OUT(NOMINAL)
J
IN
*FOR V
= 0.6V
OUT
SHDN
V
= V
IN
R
L
= 6Ω
L
I
= 100mA*
OFF TO ON
R
I
= 12Ω
= 50mA*
ON TO OFF
L
L
R
L
= 600Ω
L
R
I
= 60Ω
= 10mA*
L
L
I
= 1mA*
0
0
1
2
3
4
5
6
7
8
9
10
0
10 20 30 40 50 60 70 80 90 100
–75 –50 –25
0
25 50 75 100 125 150 175
INPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
TEMPERATURE (°C)
3060 G25
3060 G26
3060 G27
SHDN Pin Input Current
SHDN Pin Input Current
ADJ Pin Bias Current
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
50
40
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
V
= 45V
SHDN
30
20
10
0
–10
–20
–30
–40
–50
–75 –50 –25
0
25 50 75 100 125 150 175
–75 –50 –25
0
25 50 75 100 125 150 175
0
5
10 15 20 25 30 35 40 45
TEMPERATURE (°C)
TEMPERATURE (°C)
SHDN PIN VOLTAGE (V)
3060 G29
3060 G28
3060 G30
Current Limit vs Temperature
LT3060 Reverse Output Current
Current Limit vs VIN–VOUT
250
225
200
175
150
125
100
75
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
250
225
200
175
150
125
100
75
T = 25°C
J
∆V
= –5%
OUT
T = 125°C
J
V
= 0V
IN
T = 25°C
J
CURRENT FLOWS
INTO OUT PIN
V
= V
OUT
ADJ
T = –50°C
J
ADJ
50
50
V
V
= 7V
IN
OUT
25
25
OUT
= 0V
0
0
–75 –50 –25
0
25 50 75 100 125 150 175
0
5
10 15 20 25 30 35 40 45
0
5
10 15 20 25 30 35 40 45
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
INPUT/OUTPUT DIFFERENTIAL (V)
3060 G32
3060 G33
3060 G31
3060fc
10
For more information www.linear.com/LT3060
LT3060 Series
TA = 25°C, unless otherwise noted.
Typical perForMance characTerisTics
LT3060-1.2/-1.5/-1.8/-2.5/-3.3/-5
/-15 Reverse Output Current
Reverse Output Current
Input Ripple Rejection
50
45
40
35
30
25
20
15
10
5
350
300
250
200
150
100
50
100
90
80
70
60
50
40
30
20
10
0
V
V
V
V
V
V
V
V
= 0V, V
= V
= 1.2V (LT3060)
ADJ
T = 25°C
IN
IN
OUT
J
V
LT3060-1.2
LT3060-1.5
LT3060-1.8
LT3060-2.5
LT3060-3.3
V = 0.6V
OUT
= 0V
= 1.2V (LT3060-1.2)
= 1.5V (LT3060-1.5)
= 1.8V (LT3060-1.8)
= 2.5V (LT3060-2.5)
= 3.3V (LT3060-3.3)
= 5V (LT3060-5)
= 15V (LT3060-15)
OUT
OUT
OUT
OUT
OUT
OUT
OUT
V
= 5V
OUT
C
= 10µF
OUT
LT3060-5
ADJ (LT3060)
LT3060-15
OUT (LT3060-1.2/-1.5/
-1.8/2.5/-3.3/-5/-15)
I
C
V
= 100mA
L
= C = 0
REF/BYP
= V
FF
+ 1.5V +
IN
OUT(NOMINAL)
RIPPLE
C
= 2.2µF
50mV
OUT
RMS
OUT (LT3060)
25 50 75 100 125 150 175
TEMPERATURE (°C)
0
0
10
100
1k
10k 100k 1M
10M
0
5
10 15 20 25 30 35 40 45
–75 –50 –25
0
FREQUENCY (Hz)
OUTPUT VOLTAGE (V)
3060 G36
3060 G34
3060 G35
LT3060-5 Input Ripple Rejection
LT3060-15 Input Ripple Rejection
Ripple Rejection vs Temperature
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
100
C
= C = 10nF
FF
C
= C = 10nF
FF
REF/BYP
C
= 10nF
REF/BYP
REF/BYP
90
80
70
60
50
40
30
20
10
0
C
= 10nF, C = 0
FF
REF/BYP
C
= 10nF, C = 0
FF
REF/BYP
C
= 0
REF/BYP
I
= 100mA
= 15V
OUT
I
= 100mA
= 5V
L
L
OUT
I
V
V
= 100mA
= 0.6V
IN
V
C
V
V
C
V
L
OUT
C
= C = 0
FF
C
= C = 0
FF
REF/BYP
REF/BYP
= 10µF
= 10µF
OUT
OUT
= 2.6V + 0.5V RIPPLE AT f = 120Hz
= 16V + 50mV
RIPPLE
RMS
= 6V + 50mV
RIPPLE
RMS
P-P
IN
IN
10
100
1k
10k 100k 1M
10M
10
100
1k
10k 100k 1M
10M
–75 –50 –25
0
25 50 75 100 125 150 175
FREQUENCY (Hz)
FREQUENCY (Hz)
TEMPERATURE (°C)
3060 G38
3060 G37a
3060 G37
Minimum Input Voltage
Load Regulation
Load Regulation
5
0
0
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
LT3060-2.5
–5
–10
–15
–20
–25
–30
–35
–40
I
= 100mA
L
–5
LT3060-5
I
= 50mA
L
–10
–15
–20
–25
LT3060-15
LT3060-5
LT3060-3.3
LT3060-2.5
LT3060-1.8
LT3060-1.5
LT3060-1.2
LT3060
V
= V
+ 0.55V
OUT(NOMINAL)
IN
L
–45
–50
V
= V
IN
∆I = 1mA TO 100mA
SHDN
–75 –50 –25
0
25 50 75 100 125 150 175
TEMPERATURE (°C)
+ 0.55V (LT3060-1.8/-2.5/-3.3/-5)
–75 –50 –25
0
25 50 75 100 125 150 175
–75 –50 –25
0
25 50 75 100 125 150 175
3060 G40
TEMPERATURE (°C)
TEMPERATURE (°C)
3060 G40a
3060 G39
V
V
= V
OUT(NOMINAL)
IN
= 2.1V (LT3060/-1.2/-1.5)
IN
∆I = 1mA TO 100mA
L
3060fc
11
For more information www.linear.com/LT3060
LT3060 Series
TA = 25°C, unless otherwise noted.
Typical perForMance characTerisTics
Output Noise Spectral Density
CREF/BYP = 0, CFF = 0
Output Noise Spectral Density
vs CREF/BYP, CFF = 0
Output Noise Spectral Density
vs CFF, CREF/BYP = 10nF
10
1
100
10
1
10
1
C
OUT
= 10µF
C
= 100pF
REF/BYP
V
= 5V
OUT
I
= 100mA
L
C
FF
= 0
V
= 0.6V
OUT
C
FF
= 10nF
0.1
0.01
0.1
0.01
C
= 10nF
REF/BYP
0.1
V
V
V
V
= 15V
= 5V
= 3.3V
= 2.5V
V
V
V
V
= 1.8V
= 1.5V
= 1.2V
= 0.6V
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
C
= 1nF
C
= 1nF
1k
REF/BYP
FF
V
C
I
= 5V
OUT
OUT
L
C
L
= 10µF
C
FF
= 100pF
10k
OUT
= 100mA
= 10µF
I
= 100mA
0.01
10
100
1k
FREQUENCY (Hz)
10k
100k
10
100
100k
10
100
1k
FREQUENCY (Hz)
10k
100k
FREQUENCY (Hz)
3060 G42
3060 G43
3060 G41
RMS Output Noise vs Load Current
vs CREF/BYP, CFF = 0
RMS Output Noise vs Load Current
CREF/BYP = 10nF, CFF = 0
RMS Output Noise vs Load Current
CREF/BYP = 10nF, CFF = 0
350
325
300
275
250
225
200
175
150
125
100
75
110
100
90
80
70
60
50
40
30
20
10
0
170
160
150
140
130
120
110
100
90
f = 10Hz TO 100kHz
V
C
= 0.6V
= 10µF
f = 10Hz TO 100kHz
OUT
OUT
V
OUT
= 5V
C
= 10µF
C
OUT
I
= 10µF
C
= 0
OUT
REF/BYP
V
= 15V
OUT
I
= 5µA
= 5µA
FB-DIVIDER
FB-DIVIDER
V
= 2.5V
OUT
C
= 10pF
REF/BYP
V
OUT
= 3.3V
V
OUT
= 1.8V
V
= 1.5V
OUT
C
= 100pF
REF/BYP
80
V
= 5V
OUT
V
70
60
= 2.5V
C
= 1nF
OUT
REF/BYP
50
40
V
V
= 1.2V
= 0.6V
OUT
C
= 10nF
REF/BYP
30
50
25
0
V
OUT
= 0.6V
20
C
1
= 100nF
REF/BYP
OUT
10
0
0.01
0.1
1
10
100
0.01
0.1
10
100
0.01
0.1
1
10
100
LOAD CURRENT (mA)
LOAD CURRENT (mA)
3060 G44
LOAD CURRENT (mA)
3060 G45a
3060 G45
RMS Output Noise
vs Feedforward Capacitor (CFF)
RMS Output Noise
vs Feedforward Capacitor (CFF)
120
110
100
90
80
70
60
50
40
30
20
10
0
250
225
200
175
150
125
100
75
f = 10Hz TO 100kHz
f = 10Hz TO 100kHz
V
= 5V
OUT
C
C
I
= 10nF
V
= 15V
C
C
I
= 10nF
REF/BYP
OUT
FB-DIVIDER
= 100mA
OUT
REF/BYP
OUT
FB-DIVIDER
= 100mA
V
= 3.3V
= 10µF
= 10µF
OUT
= 5µA
= 5µA
V
= 2.5V
OUT
I
I
L
L
V
= 5V
OUT
V
= 2.5V
OUT
50
V
= 0.6V
OUT
V
= 1.8V
V
V
= 1.2V
OUT
OUT
25
V
= 0.6V
= 1.5V
OUT
OUT
0
10p
100p
1n
10n
10p
100p
1n
10n
FEEDFORWARD CAPACITOR, C (F)
FEEDFORWARD CAPACITOR, C (F)
FF
FF
3060 G46
3060 G46a
3060fc
12
For more information www.linear.com/LT3060
LT3060 Series
TA = 25°C, unless otherwise noted.
Typical perForMance characTerisTics
LT3060-5 10Hz to 100kHz Output
Noise, CREF/BYP = 10nF, CFF = 10nF
LT3060-5 Transient Response,
LT3060-5 10Hz to 100kHz Output
Noise, CREF/BYP = 10nF, CFF = 0
C
FF = 0
V
= 5V
OUT
V
OUT
50mV/DIV
V
V
OUT
OUT
100µV/DIV
100µV/DIV
∆I
OUT
= 10mA TO 100mA
I
OUT
50mA/DIV
3060 G47
3060 G49
3060 G48
C
I
= 10µF
= 100mA
= 5V
1ms/DIV
V
= 6V
IN
OUT IN
100µs/DIV
C
I
= 10µF
= 100mA
= 5V
1ms/DIV
OUT
L
OUT
OUT
L
OUT
C
I
= C = 10µF
V
= 5µA
V
FB-DIVIDER
LT3060-5 Transient Response
Load Dump
LT3060-5 Transient Response,
CFF = 10nF
V
= 5V
V
= 5V
OUT
OUT
V
V
OUT
OUT
10mV/DIV
20mV/DIV
V
= 12V TO 45V
IN
∆I
OUT
= 10mA TO 100mA
V
I
IN
OUT
10V/DIV
50mA/DIV
3060 G51
3060 G50
2ms/DIV
V
C
= 6V
20µs/DIV
IN
OUT
C
C
= C = 2.2µF
IN
OUT
= C = 10µF
IN
= C = 10nF
REF/BYP
FF
= 5µA
I
= 5µA
FB-DIVIDER
I
FB-DIVIDER
SHDN Transient Response
CREF/BYP = 10nF
SHDN Transient Response
C
REF/BYP = 0
V
V
OUT
OUT
2V/DIV
L
2V/DIV
R
= 50Ω
R
= 50Ω
L
REF/BYP
500mV/DIV
REF/BYP
500mV/DIV
SHDN
1V/DIV
SHDN
1V/DIV
3060 G53
3060 G52
4ms/DIV
4ms/DIV
C
C
= C = 2.2µF
IN
C
FF
= C = 2.2µF
OUT
FF
OUT
IN
= 0
C
= 0
3060fc
13
For more information www.linear.com/LT3060
LT3060 Series
TA = 25°C, unless otherwise noted.
Start-Up Time vs CFF
Typical perForMance characTerisTics
Start-Up Time
vs REF/BYP Capacitor
1000
100
100
10
C
= 0
REF/BYP
C
= 0
FF
LT3060-15
I
= 5µA
FB-DIVIDER
LT3060-5
10
1
LT3060-3.3
1
LT3060-2.5
0.1
LT3060-1.8
0.1
LT3060-1.5
1n
LT3060-1.2
100p
0.01
0.01
10p
100p
1n
10n
100n
10p
10n
100n
REF/BYP CAPACITOR (F)
FEEDFORWARD CAPACITOR, C (F)
FF
3060 G54
3060 G55
3060fc
14
For more information www.linear.com/LT3060
LT3060 Series
pin FuncTions (DC8/TS8)
REF/BYP (Pin 1/Pin 8): Reference/Bypass. Connecting
a single capacitor from this pin to GND bypasses the
LT3060’s reference noise and soft-starts the reference.
A 10nF bypass capacitor typically reduces output voltage
IN (Pins 5, 6/Pin 5): Input. These pin(s) supply power to
thedevice.TheLT3060requiresalocalINbypasscapacitor
if it is located more than six inches from the main input
filter capacitor. In general, battery output impedance rises
with frequency, so adding a bypass capacitor in battery-
powered circuits is advisable.
noise to 30µV
in a 10Hz to 100kHz bandwidth. Soft-
RMS
starttimeisdirectlyproportionaltotheREF/BYPcapacitor
value. If the LT3060 is placed in shutdown, REF/BYP is
actively pulled low by an internal device to reset soft-start.
If low noise or soft-start performance is not required, this
pin must be left floating (unconnected). Do not drive this
pin with any active circuitry.
An input bypass capacitor in the range of 1µF to 10µF
suffices. The LT3060 withstands reverse voltages on the
IN pin with respect to its GND and OUT pins. In a reversed
input situation, such as a battery plugged in backwards,
the LT3060 behaves as if a large resistor is in series with
its input. Limited reverse current flows into the LT3060
and no reverse voltage appears at the load. The device
protects itself and the load.
ADJ (Pin 2/Pin 7): Adjust. This pin is the error ampli-
fier’s inverting terminal. It’s typical bias current of 15nA
flows out of the pin (see curve of ADJ Pin Bias Current vs
Temperature in the Typical Performance Characteristics
section).TheADJpinvoltageis600mVreferencedtoGND.
SHDN (Pin 7/Pin 1): Shutdown. Pulling the SHDN pin
low puts the LT3060 into a low power state and turns
the output off. Drive the SHDN pin with either logic or an
open collector/drain with a pull-up resistor. The resistor
supplies the pull-up current to the open collector/drain
logic, normally several microamperes, and the SHDN
pin current, typically less than 3µA. If unused, connect
the SHDN pin to IN. The LT3060 does not function if the
SHDN pin is not connected. The SHDN pin cannot be
driven below GND unless tied to the IN pin. If the SHDN
pin is driven below GND while IN is powered, the output
may turn on. SHDN pin logic cannot be referenced to a
negative supply voltage.
Connecting a capacitor from ADJ to OUT reduces output
noiseandimprovestransientresponseforoutputvoltages
greaterthan600mV.SeetheApplicationsInformationsec-
tion for calculating the value of the feedforward capacitor.
For fixed voltage versions of the LT3060, if low noise and
fast transient response is not required, this pin must be
left floating (unconnected).
OUT(Pins3,4/Pin6):Output.Thesepin(s)supplypowerto
theload. Stabilityrequirementsdemandaminimum2.2µF
ceramic output capacitor to prevent oscillations. Large
load transient applications require larger output capaci-
tors to limit peak voltage transients. See the Applications
Information section for details on transient response and
reverseoutputcharacteristics. Permissibleoutputvoltage
range is 600mV to 44.5V.
GND (Pin 8, Exposed Pad Pin 9/Pins 2, 3, 4): Ground.
For the adjustable LT3060, connect the bottom of the ex-
ternal resistor divider that sets the output voltage directly
to GND for optimum regulation. For the DFN package, tie
exposed pad Pin 9 directly to Pin 8 and the PCB ground.
Thisexposedpadprovidesenhancedthermalperformance
with its connection to the PCB ground. See the Applica-
tions Information section for thermal considerations and
calculating junction temperature.
3060fc
15
For more information www.linear.com/LT3060
LT3060 Series
applicaTions inForMaTion
The LT3060 series are micropower, low noise, low drop-
out voltage, 100mA linear regulators with shutdown. The
devices supply up to 100mA at a typical dropout voltage
of 300mV and operate over a 1.6V to 45V input range.
Adjustable Operation
The LT3060 adjustable version has an output voltage
range of 0.6V to 44.5V. The output voltage is set by the
ratio of two external resistors, as shown in Figure 1.
The device servos the output to maintain the ADJ pin
voltage at 0.6V referenced to ground. The current in
R1 is then equal to 0.6V/R1, and the current in R2
is the current in R1 minus the ADJ pin bias current.
The ADJ pin bias current, 15nA at 25°C, flows from the
ADJ pin through R1 to GND. Calculate the output voltage
usingtheformulainFigure1. ThevalueofR1shouldbeno
greater than 124k to provide a minimum 5µA load current
so that errors in the output voltage, caused by the ADJ pin
bias current, are minimized. Note that in shutdown, the
output is turned off and the divider current is zero. Curves
of ADJ Pin Voltage vs Temperature and ADJ Pin Bias Cur-
rent vs Temperature appear in the Typical Performance
Characteristics section.
A single external capacitor provides programmable low
noise reference performance and output soft-start func-
tionality. For example, connecting a 10nF capacitor from
the REF/BYP pin to GND lowers output noise to 30µV
RMS
over a 10Hz to 100kHz bandwidth. This capacitor also
soft-starts the reference and prevents output voltage
overshoot at turn-on.
The LT3060’s quiescent current is merely 40μA for the
adjustableversionand45µAforthefixedvoltageversions,
while providing fast transient response with a minimum
low ESR 2.2μF ceramic output capacitor. In shutdown,
quiescent current is less than 1μA and the reference soft-
start capacitor is reset.
The LT3060 regulators optimize stability and transient
response with low ESR, ceramic output capacitors. The
regulators do not require the addition of ESR as is com-
mon with other regulators. The LT3060 adjustable version
typically provides 0.1% line regulation and 0.03% load
regulation. For fixed voltage versions, load regulation is
slightly increased due to 20mΩ of typical resistance in
series with the output. Curves of load regulation appear
in the Typical Performance Characteristics section.
The adjustable device is tested and specified with the ADJ
pintiedtotheOUTpin,yieldingV
=0.6V.Specifications
OUT
for output voltages greater than 0.6V are proportional to
the ratio of the desired output voltage to 0.6V:V /0.6V.
OUT
For example, load regulation for an output current change
of 1mA to 100mA is 0.2mV (typical) at V
OUT
= 0.6V. At
OUT
V
= 12V, load regulation is:
12V
0.6V
• (0.2mV) = 4mV
Internal protection circuitry includes reverse-battery pro-
tection,reverse-outputprotection,reverse-currentprotec-
tion, current limit with foldback and thermal shutdown.
IN
OUT
ADJ
V
OUT
V
IN
LT3060
R2
R1
This “bullet-proof” protection set makes it ideal for use in
battery-powered systems. In battery backup applications
where the output is held up by a backup battery and the
input is pulled to ground, the LT3060 acts like it has a di-
ode in series with its output and prevents reverse current
flow. Additionally, in dual supply applications where the
regulator load is returned to a negative supply, the output
can be pulled below ground by as much as 45V and the
device still starts normally and operates.
R2
R1
SHDN
VOUT = 0.6V 1+
– I
(
• R2
ADJ
)
GND REF/BYP
VADJ = 0.6V
IADJ = 15nA at 25ºC
OUTPUT RANGE = 0.6V to 44.5V
3060 F01
Figure 1. Adjustable Operation
3060fc
16
For more information www.linear.com/LT3060
LT3060 Series
applicaTions inForMaTion
Table1shows1%resistordividervaluesforsomecommon
outputvoltageswitharesistordividercurrentofabout5µA.
To lower the output voltage noise for higher output volt-
ages, include a feedforward capacitor (C ) from V
FF
OUT
to the ADJ pin. A good quality, low leakage capacitor is
recommended.Thiscapacitorbypassestheerroramplifier
oftheregulator,providingalowfrequencynoisepole.With
Table 1. Output Voltage Resistor Divider Values
V
R1
R2
OUT
(V)
1.2
1.5
1.8
2.5
3
(kΩ)
(kΩ)
the use of 10nF for both C and C
, output voltage
FF
RMS
REF/BYP
when the output voltage is
118
121
124
115
124
124
115
124
124
118
182
249
365
499
562
845
2370
3010
noise decreases to 30µV
set to 5V by a 5µA feedback resistor divider. If the current
in the feedback resistor divider is doubled, C must also
FF
be doubled to achieve equivalent noise performance.
Higher values of output voltage noise are often measured
if care is not exercised with regard to circuit layout and
testing. Crosstalk from nearby traces induces unwanted
noiseontotheLT3060’soutput. Powersupplyripplerejec-
tion must also be considered. The LT3060 regulators do
not have unlimited power supply rejection and will pass
a small portion of the input noise through to the output.
3.3
5
12
15
Bypass Capacitance, Output Voltage Noise and
Transient Response
Using a feedforward capacitor (C ) from V
to the ADJ
FF
OUT
The LT3060 regulators provide low output voltage noise
over the 10Hz to 100kHz bandwidth while operating at
full load with the addition of a reference bypass capacitor
pin has the added benefit of improving transient response
foroutputvoltagesgreaterthan0.6V. Withnofeedforward
capacitor, the settling time will increase as the output
voltage is raised above 0.6V. Use the equation in Figure 2
(C ) from the REF/BYP pin to GND. A good quality,
REF/BYP
low leakage capacitor is recommended. This capacitor
bypasses the internal reference of the regulator, provid-
ing a low frequency noise pole. With the use of 10nF for
to determine the minimum value of C to achieve a
FF
transient response that is similar to 0.6V output voltage
performance regardless of the chosen output voltage
(see Figure 3 and Transient Response in the Typical Perf-
ormance Characteristics section).
C
the output voltage noise decreases to as low as
whentheoutputvoltageissetfor0.6V.Forhigher
REF/BYP,
30µV
RMS
output voltages (generated by using a feedback resistor
divider), the output voltage noise gains up accordingly
V
C
= 5V
OUT
OUT
when using C
by itself.
REF/BYP
= 10µF
I
= 5µA
FB-DIVIDER
0
IN
OUT
V
OUT
100pF
1nF
C
C
OUT
R2
R1
V
IN
FF
LT3060
SHDN
ADJ
10nF
GND REF/BYP
LOAD CURRENT
100mA/DIV
4.7nF
5µA
CFF
≥
• I
(
)
FB− DIVIDER
3060 F03
C
100µs/DIV
REF/BYP
VOUT
IFB−DIVIDER
=
3060 F02
R1+ R2
Figure 3. Transient Response vs Feedforward Capacitor
Figure 2. Feedforward Capacitor for Fast Transient Response
3060fc
17
For more information www.linear.com/LT3060
LT3060 Series
applicaTions inForMaTion
During start-up, the internal reference soft-starts if a
reference bypass capacitor is present. Regulator start-
up time is directly proportional to the size of the bypass
capacitor, slowing to 6ms with a 10nF bypass capacitor
(See Start-up Time vs REF/BYP Capacitor in the Typical
Performance Characteristics section). The reference by-
pass capacitor is actively pulled low during shutdown to
reset the internal reference.
changes. Bypass capacitors, used to decouple individual
components powered by the LT3060, increase the effec-
tive output capacitor value. For applications with large
load current transients, a low ESR ceramic capacitor in
parallel with a bulk tantalum capacitor often provides an
optimally damped response.
Giveextraconsiderationtotheuseofceramiccapacitors.
Manufacturers make ceramic capacitors with a variety of
dielectrics, each with different behavior across tempera-
ture and applied voltage. The most common dielectrics
are specified with EIA temperature characteristic codes
of Z5U, Y5V, X5R and X7R. The Z5U and Y5V dielectrics
provide high C-V products in a small package at low cost,
butexhibitstrongvoltageandtemperaturecoefficients,as
shown in Figures 4 and 5. When used with a 5V regulator,
a 16V 10µF Y5V capacitor can exhibit an effective value
as low as 1µF to 2µF for the DC bias voltage applied, and
over the operating temperature range. The X5R and X7R
dielectrics yield much more stable characteristics and
are more suitable for use as the output capacitor.
Start-up time is also affected by the use of a feedforward
capacitor. Start-uptimeisdirectlyproportionaltothesize
of the feedforward capacitor and output voltage, and is
inversely proportional to the feedback resistor divider
current, slowing to 15ms with a 4.7nF feedforward ca-
pacitor and a 10µF output capacitor for an output voltage
set to 5V by a 5µA feedback resistor divider.
Output Capacitance
The LT3060 regulators are stable with a wide range of
output capacitors. The ESR of the output capacitor af-
fects stability, most notably with small capacitors. Use
a minimum output capacitor of 2.2µF with an ESR of 3Ω
or less to prevent oscillations. If a feedforward capacitor
is used with output voltages set for greater than 24V, use
a minimum output capacitor of 4.7µF. The LT3060 is a
micropower device and output load transient response is
a function of output capacitance. Larger values of output
capacitance decrease the peak deviations and provide
improved transient response for larger load current
The X7R type works over a wider temperature range
and has better temperature stability, while the X5R is
less expensive and is available in higher values. Care
still must be exercised when using X5R and X7R ca-
pacitors; the X5R and X7R codes only specify operating
temperature range and maximum capacitance change
over temperature. Capacitance change due to DC bias
with X5R and X7R capacitors is better than Y5V and Z5U
40
20
20
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10µF
0
X5R
X5R
0
–20
–20
–40
–40
Y5V
–60
–60
Y5V
–80
–80
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10µF
–100
–100
–50 –25
0
25
50
TEMPERATURE (°C)
75
100 125
0
8
12 14
2
4
6
10
16
DC BIAS VOLTAGE (V)
3060 F04
3060 F05
Figure 4. Ceramic Capacitor DC Bias Characteristics
Figure 5. Ceramic Capacitor Temperature Characteristics
3060fc
18
For more information www.linear.com/LT3060
LT3060 Series
applicaTions inForMaTion
capacitors, but can still be significant enough to drop
capacitor values below appropriate levels. Capacitor DC
bias characteristics tend to improve as component case
size increases, but expected capacitance at operating
voltage should be verified.
allowing the regulator to supply large output currents.
With a high input voltage, a problem can occur wherein
the removal of an output short will not allow the output
to recover. Other regulators, such as the LT1083/LT1084/
LT1085familyandLT1764Aalsoexhibitthisphenomenon,
so it is not unique to the LT3060. The problem occurs
with a heavy output load when the input voltage is high
and the output voltage is low. Common situations are: (1)
immediately after the removal of a short-circuit or (2) if
the shutdown pin is pulled high after the input voltage is
alreadyturnedon.Theloadlineintersectstheoutputcurrent
curve at two points creating two stable output operating
points for the regulator. With this double intersection, the
input power supply needs to be cycled down to zero and
brought up again for the output to recover.
Voltage and temperature coefficients are not the only
sources of problems. Some ceramic capacitors have a
piezoelectric response. A piezoelectric device generates
voltage across its terminals due to mechanical stress,
similar to the way a piezoelectric accelerometer or mi-
crophone works. For a ceramic capacitor, the stress is
inducedbyvibrationsinthesystemorthermaltransients.
The resulting voltages produced cause appreciable
amountsofnoise. Aceramiccapacitorproducedthetrace
in Figure 6 in response to light tapping from a pencil.
Similar vibration induced behavior can masquerade as
increased output voltage noise.
Thermal Considerations
The power handling capability of the device will be limited
by the maximum rated junction temperature (125°C for
LT3060E, LT3060I or 150°C for LT3060MP, LT3060H). Two
componentscomprisethepowerdissipatedbythedevice:
V
C
C
= 0.6V
= 10µF
OUT
OUT
= 10nF
REF/BYP
I
= 100mA
LOAD
1. Output current multiplied by the input/output voltage
V
OUT
500µV/DIV
differential: I
• (V –V ), and
OUT
IN OUT
2. GND pin current multiplied by the input voltage:
• V
I
GND
IN
3060 F06
4ms/DIV
GND pin current is determined using the GND Pin Current
curvesintheTypicalPerformanceCharacteristicssection.
Power dissipation equals the sum of the two components
listed above.
Figure 6. Noise Resulting from Tapping on a Ceramic Capacitor
Overload Recovery
The LT3060 regulators have internal thermal limiting that
protectsthedeviceduringoverloadconditions.Forcontinu-
ousnormalconditions,themaximumjunctiontemperature
of125°C(E-grade,I-grade)or150°C(MP-grade,H-grade)
must not be exceeded. Carefully consider all sources of
thermal resistance from junction-to-ambient including
other heat sources mounted in proximity to the LT3060.
Like many IC power regulators, the LT3060 has safe
operating area protection. The safe operating area protec-
tion decreases current limit as input-to-output voltage
increases, and keeps the power transistor inside a safe
operating region for all values of input-to-output voltage.
The LT3060 provides some output current at all values of
input-to-outputvoltageuptothespecified45Voperational
maximum.
The underside of the LT3060 DFN package has exposed
2
metal (1mm ) from the lead frame to the die attachment.
The package allows heat to directly transfer from the die
junction to the printed circuit board metal to control maxi-
mum operating junction temperature. The dual-in-line pin
arrangement allows metal to extend beyond the ends of
3060fc
Whenpowerisfirstapplied, theinputvoltagerisesandthe
output follows the input; allowing the regulator to start-up
intoveryheavyloads. Duringstart-up, astheinputvoltage
is rising, the input-to-output voltage differential is small,
19
For more information www.linear.com/LT3060
LT3060 Series
applicaTions inForMaTion
the package on the topside (component side) of a PCB.
Connect this metal to GND on the PCB. The multiple IN
and OUT pins of the LT3060 also assist in spreading heat
to the PCB.
Calculating Junction Temperature
Example: Given an output voltage of 2.5V, an input volt-
age range of 12V 5%, an output current range of 0mA
to 50mA and a maximum ambient temperature of 85°C,
what will the maximum junction temperature be?
For surface mount devices, heat sinking is accomplished
by using the heat spreading capabilities of the PC board
and its copper traces. Copper board stiffeners and plated
through-holes also can spread the heat generated by
power devices.
The power dissipated by the device equals:
I
• (V
–V ) + I
• V
OUT(MAX)
IN(MAX) OUT
GND IN(MAX)
where,
Tables 2 and 3 list thermal resistance for several different
boardsizesandcopperareas.Allmeasurementsweretaken
in still air on a 4 layer FR-4 board with 1oz solid internal
planesand2oztop/bottomexternaltraceplaneswithatotal
boardthicknessof1.6mm.Thefourlayerswereelectrically
isolated with no thermal vias present. PCB layers, copper
weight, board layout and thermal vias will affect the resul-
tant thermal resistance. For more information on thermal
resistance and high thermal conductivity test boards,
refer to JEDEC standard JESD51, notably JESD51-12 and
JESD51-7. Achieving low thermal resistance necessitates
attention to detail and careful PCB layout.
I
= 50mA
= 12.6V
OUT(MAX)
V
IN(MAX)
I
at (I = 50mA, V = 12.6V) = 0.6mA
OUT IN
GND
So,
P = 50mA • (12.6V – 2.5V) + 0.6mA • 12.6V = 0.513W
Using a DFN package, the thermal resistance ranges from
48°C/W to 60°C/W depending on the copper area with
no thermal vias. So the junction temperature rise above
ambient approximately equals:
0.513W • 54°C/W = 27.8°C
Table 2. DC Package, 8-Lead DFN
COPPER AREA
The maximum junction temperature equals the maximum
ambienttemperatureplusthemaximumjunctiontempera-
ture rise above ambient or:
BOARD AREA
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
TOPSIDE* BACKSIDE
2
2
2
(mm )
(mm )
(mm )
2500
1000
225
100
50
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
48°C/W
49°C/W
50°C/W
54°C/W
60°C/W
T
= 85°C + 27.8°C = 112.8°C
JMAX
Protection Features
The LT3060 regulators incorporate several protection
features that make it ideal for use in battery-powered
circuits. In addition to the normal protection features
associated with monolithic regulators, such as current
limiting and thermal limiting, the device also protects
against reverse-input voltages, reverse-output voltages
and reverse output-to-input voltages.
*Device is mounted on topside
Table 3. TS8 Package, 8 Lead TSOT-23
COPPER AREA
BOARD AREA
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
TOPSIDE* BACKSIDE
2
2
2
(mm )
(mm )
(mm )
2500
1000
225
100
50
2500
2500
2500
2500
2500
2500
2500
2500
2500
2500
57°C/W
58°C/W
59°C/W
63°C/W
67°C/W
Current limit protection and thermal overload protection
protect the device against current overload conditions at
the output of the device. The typical thermal shutdown
temperatureis165°C.Fornormaloperation,donotexceed
a junction temperature of 125°C (LT3060E, LT3060I) or
150°C (LT3060MP, LT3060H).
*Device is mounted on topside
3060fc
20
For more information www.linear.com/LT3060
LT3060 Series
applicaTions inForMaTion
The LT3060 IN pin withstands reverse voltages up to 50V.
The device limits current flow to less than 300µA (typi-
cally less than 50µA) and no negative voltage appears at
OUT. The device protects both itself and the load against
batteries that are plugged in backwards.
The LT3060 incurs no damage if the ADJ pin is pulled
above or below ground by less than 50V. For the adjust-
able version, if the input is left open-circuit or grounded,
the ADJ pin performs like a large resistor (typically 30k)
in series with a diode when pulled below ground, and like
30k in series with two diodes when pulled above ground.
The SHDN pin cannot be driven below GND unless tied to
the IN pin. If the SHDN pin is driven below GND while IN is
powered, the output may turn on. SHDN pin logic cannot
be referenced to a negative supply voltage.
In circuits where a backup battery is required, several
different input/output conditions can occur. The output
voltage may be held up while the input is either pulled to
ground, pulled to some intermediate voltage or left open-
circuit. Current flow back into the output follows the curve
shown in Figures 7 and 8.
The LT3060 incurs no damage if its output is pulled be-
low ground. If the input is left open-circuit or grounded,
the output can be pulled below ground by 50V. No cur-
rent flows through the pass transistor from the output.
However, current flows in (but is limited by) the resistor
divider that sets the output voltage. Current flows from
the bottom resistor in the divider and from the ADJ pin’s
internal clamp through the top resistor in the divider to
the external circuitry pulling OUT below ground. If the
input is powered by a voltage source, the output sources
current equal to its current limit capability and the LT3060
protects itself by thermal limiting. In this case, grounding
the SHDN pin turns off the device and stops the output
from sourcing current.
If the LT3060’s IN pin is forced below the OUT pin or the
OUT pin is pulled above the IN pin, input current typically
drops to less than 1µA. This occurs if the LT3060 input
is connected to a discharged (low voltage) battery and
either a backup battery or a second regulator holds up
the output. The state of the SHDN pin has no effect on
the reverse current if the output is pulled above the input.
2.0
350
T = 25°C
IN
J
V
T = 25°C
IN
J
LT3060-1.2
LT3060-1.5
LT3060-1.8
LT3060-2.5
LT3060-3.3
LT3060-5
LT3060-15
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
= 0V
V
= 0V
300
250
200
150
100
50
CURRENT FLOWS
INTO OUT PIN
V
= V
OUT
ADJ
ADJ
OUT
0
0
5
10 15 20 25 30 35 40 45
OUTPUT VOLTAGE (V)
0
5
10 15 20 25 30 35 40 45
OUTPUT VOLTAGE (V)
3060 F08
3060 F07
Figure 7. LT3060 Reverse Output Current
Figure 8. LT3060-1.2/-1.5/-1.8/-2.5/-3.3/-5/-15
Reverse Output Current
3060fc
21
For more information www.linear.com/LT3060
LT3060 Series
Typical applicaTion
Paralleling of Regulators for Higher Output Current
R1
0.15Ω
2.5V
200mA
IN
OUT
ADJ
R8
1.91k
1%
+
C2
LT3060
C1
2.2µF
V
IN
> 2.9V
4.7µF
SHDN
R9
604Ω
1%
GND REF/BYP
C3
1nF
R2
0.15Ω
IN
OUT
LT3060
SHDN
GND REF/BYP
R6
1.74k
1%
SHDN
ADJ
R7
604Ω
1%
C4
1nF
R3
200Ω
R4
200Ω
R5
1k
7
3
+
–
6
LT1637
4
2
C5
10nF
3060 TA03
3060fc
22
For more information www.linear.com/LT3060
LT3060 Series
package DescripTion
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
DC Package
8-Lead Plastic DFN (2mm × 2mm)
(Reference LTC DWG # 05-08-1719 Rev A)
0.70 ±0.05
2.55 ±0.05
0.64 ±0.05
1.15 ±0.05
(2 SIDES)
PACKAGE
OUTLINE
0.25 ± 0.05
0.45 BSC
1.37 ±0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
R = 0.115
TYP
5
8
R = 0.05
TYP
0.40 ± 0.10
2.00 ±0.10 0.64 ± 0.10
PIN 1 NOTCH
R = 0.20 OR
0.25 × 45°
CHAMFER
(4 SIDES)
(2 SIDES)
PIN 1 BAR
TOP MARK
(SEE NOTE 6)
(DC8) DFN 0409 REVA
4
1
0.23 ± 0.05
0.45 BSC
0.75 ±0.05
0.200 REF
1.37 ±0.10
(2 SIDES)
BOTTOM VIEW—EXPOSED PAD
0.00 – 0.05
NOTE:
1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
3060fc
23
For more information www.linear.com/LT3060
LT3060 Series
package DescripTion
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
TS8 Package
8-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1637 Rev A)
2.90 BSC
(NOTE 4)
0.40
MAX
0.65
REF
1.22 REF
1.4 MIN
1.50 – 1.75
(NOTE 4)
2.80 BSC
3.85 MAX 2.62 REF
PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.22 – 0.36
8 PLCS (NOTE 3)
0.65 BSC
0.80 – 0.90
0.20 BSC
DATUM ‘A’
0.01 – 0.10
1.00 MAX
0.30 – 0.50 REF
1.95 BSC
TS8 TSOT-23 0710 REV A
0.09 – 0.20
(NOTE 3)
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
3060fc
24
For more information www.linear.com/LT3060
LT3060 Series
revision hisTory
REV
DATE
7/10
5/11
DESCRIPTION
PAGE NUMBER
A
Added fixed voltage options for 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and 5V
Extended MP-Grade to 150°C
1-26
2-7
B
Updated test conditions for ADJ Pin Bias Current and Reverse Output Current in Applications Information section
Added fixed voltage options for 15V
19-20
1 to 14, 17, 21
26
C
9/14
Updated available packaging in Related Parts section
3060fc
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
25
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
LT3060 Series
Typical applicaTion
12V Low Noise Regulator
V
C
= 13V
= 0
IN
FF
V
OUT
12V AT 100mA
30µV NOISE
IN
OUT
ADJ
RMS
V
IN
2.37M
1%
C
FF
10nF
LT3060
SHDN
1µF
10µF
13V TO
45V
124k
1%
C
= 10nF
FF
GND REF/BYP
10nF
∆I = 10mA TO 100mA
L
LOAD
CURRENT
100mA/DIV
3060 TA04
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
TIME (ms)
3060 TA04b
relaTeD parTs
PART
DESCRIPTION
NUMBER
COMMENTS
LT1761
LT1762
LT1763
LT1764/
100mA, Low Noise LDO
150mA, Low Noise LDO
500mA, Low Noise LDO
3A, Fast Transient Response,
300mV Dropout Voltage, Low Noise: 20µV
300mV Dropout Voltage, Low Noise: 20µV
, V = 1.8V to 20V, ThinSOT Package
RMS IN
, V = 1.8V to 20V, MS8 Package
RMS IN
300mV Dropout Voltage, Low Noise: 20µV
, V = 1.8V to 20V, SO8 and 4mm × 3mm DFN Packages
RMS IN
340mV Dropout Voltage, Low Noise: 40µV
Version Stable Also with Ceramic Capacitors
, V = 2.7V to 20V, TO-220 and DD Packages, LT1764A
RMS IN
LT1764A Low Noise LDO
LT1962
LT1963/
300mA, Low Noise LDO
1.5A Low Noise, Fast Transient
270mV Dropout Voltage, Low Noise: 20µV
340mV Dropout Voltage, Low Noise: 40µV
, V = 1.8V to 20V, MS8 Package
RMS IN
, V = 2.5V to 20V, LT1963A Version Stable with
RMS IN
LT1963A Response LDO
Ceramic Capacitors; TO-220, DD, SOT-223 and SO8 Packages
LT1964
LT1965
LT3008
200mA, Low Noise, Negative LDO
340mV Dropout Voltage, Low Noise 30µV
Packages
, V = –1.8V to –20V, ThinSOT and 3mm × 3mm DFN
RMS IN
1.1A, Low Noise, Low Dropout
Linear Regulator
290mV Dropout Voltage, Low Noise: 40µV
Ceramic Capacitors; TO-220, DD-Pak, MSOP and 3mm × 3mm DFN Packages
, V : 1.8V to 20V, V : 1.2V to 19.5V, Stable with
RMS IN OUT
20mA, 45V, 3µA I Micropower LDO 300mV Dropout Voltage, Low I : 3µA, V = 2V to 45V, V
OUT
= 0.6V to 39.5V; ThinSOT and
Q
Q
IN
2mm × 2mm DFN-6 Packages
LT3009
LT3050
20mA, 3µA I Micropower LDO
Q
280mV Dropout Voltage, Low I : 3µA, V = 1.6V to 20V, 2mm × 2mm DFN and SC70 Packages
Q
IN
100mA, Low Noise Linear Regulator 340mV Dropout Voltage, Low Noise: 30µV
with Precision Current Limit and
Diagnostic Functions.
, V : 1.6V to 45V, V : 0.6V to 44.5V, Programmable
OUT
RMS IN
Precision Current Limit: 5%, Programmable Minimum I
Monitor, Output Current Monitor, Fault
OUT
Indicator, Reverse Protection; 12-Lead 2mm × 3mm DFN and MSOP Packages.
LT3080/
1.1A, Parallelable, Low Noise,
300mV Dropout Voltage (2-Supply Operation), Low Noise: 40µV
, V : 1.2V to 36V,
RMS IN
LT3080-1 Low Dropout Linear Regulator
V
: 0V to 35.7V, Current-Based Reference with 1-Resistor V
Set; Directly Parallelable (No Op
OUT
OUT
Amp Required), Stable with Ceramic Capacitors; TO-220, SOT-223, MSOP and 3mm × 3mm DFN
Packages; LT3080-1 Version Has Integrated Internal Ballast Resistor
LT3082
200mA, Parallelable, Single Resistor, Outputs May Be Paralleled for Higher Output, Current or Heat Spreading, Wide Input Voltage Range:
Low Dropout Linear Regulator
1.2V to 40V Low Value Input/Output Capacitors Required: 0.22μF, Single Resistor Sets Output Voltage,
Initial Set Pin Current Accuracy: 1%, Low Output Noise: 40μV
(10Hz to 100kHz) Reverse-Battery
RMS
Protection, Reverse-Current Protection; 8-Lead SOT-23, 3-Lead SOT-223 and
8-Lead 3mm × 3mm DFN Packages
LT3085
LT3092
500mA, Parallelable, Low Noise,
Low Dropout Linear Regulator
275mV Dropout Voltage (2-Supply Operation), Low Noise: 40µV
, V : 1.2V to 36V,
RMS IN
V
: 0V to 35.7V, Current-Based Reference with 1-Resistor V
Set, Directly Parallelable
OUT
OUT
(No Op Amp Required), Stable with Ceramic Capacitors; MS8E and 2mm × 3mm DFN-6 Packages
200mA 2-Terminal Programmable
Current Source
Programmable 2-Terminal Current Source, Maximum Output Current: 200mA, Wide Input Voltage
Range: 1.2V to 40V, Resistor Ratio Sets Output Current, Initial Set Pin Current Accuracy: 1%, Current
Limit and Thermal Shutdown Protection, Reverse-Voltage Protection, Reverse-Current Protection;
8-Lead SOT-23, 3-Lead SOT-223 and 8-Lead 3mm × 3mm DFN Packages
3060fc
LT 0914 REV C • PRINTED IN USA
26 LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
●
(408)432-1900 FAX: (408) 434-0507 www.linear.com/LT3060
LINEAR TECHNOLOGY CORPORATION 2010
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