LT1529CT#PBF [Linear]
暂无描述;
| 型号： | LT1529CT#PBF |
| 厂家： | 
Linear |
| 描述： | 暂无描述 稳压器 |
| 文件： | 总16页 (文件大小：217K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LT1584/LT1585/LT1587
7A, 4.6A, 3A Low Dropout
Fast Response
Positive Regulators
Adjustable and Fixed
U
DESCRIPTIO
FEATURES
The LT®1584/LT1585/LT1587 are low dropout three-
terminal regulators with 7A, 4.6A and 3A output current
capability, respectively. Design has been optimized for low
voltage applications where transient response and mini-
mum input voltage are critical. Similar to the LT1083/4/5
family, it has lower dropout voltage and faster transient
response. These improvements make it ideal for low volt-
age microprocessor applications requiring a regulated
2.5V to 3.6V output with an input supply below 7V.
■
Fast Transient Response
■
Guaranteed Dropout Voltage at Multiple Currents
■
Load Regulation: 0.05% Typical
Trimmed Current Limit
On-Chip Thermal Limiting
■
■
■
Standard 3-Pin PUower Package
APPLICATIO S
PentiumTM Processor Supplies
■
PowerPCTM Supplies
Current limit is trimmed to ensure specified output current
and controlled short-circuit current. On-chip thermal lim-
iting provides protection against any combination of over-
load that would create excessive junction temperatures.
■
■
Other 2.5V to 3.6V Microprocessor Supplies
■
Low Voltage Logic Supplies
Battery-Powered Circuitry
■
■
Post Regulator for Switching Supply
The LT1585/LT1587 are available in both the through-hole
and surface mount versions of the industry standard 3-pin
TO-220 power package. The LT1584 is available in the
through-hole 3-pin TO-220 power package.
LT1585/7CM, LT1584/5/7CT
Adjustable
3.3V Fixed
3.38V Fixed
3.45V Fixed
3.6V Fixed
LT1585/7CM-3.3, LT1584/5/7CT-3.3
LT1585CM-3.38, LT1584/5CT-3.38
LT1585/7CM-3.45, LT1584/5/7CT-3.45
LT1585/7CM-3.6, LT1584/5/7CT-3.6
, LTC and LT are registered trademarks of Linear Technology Corporation.
Pentium is a trademark of Intel Corporation. PowerPC is a trademark of IBM Corporation.
U
TYPICAL APPLICATIO
Dropout Voltage vs Output Current
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
3.3V, 7A, 4.6A, 3A Regulator
LT1584-3.3
LT1585-3.3
LT1587-3.3
3.3V
V
IN
≥ 4.75V
7A, 4.6A, 3A
+
+
C1
10µF
C2*
SOLID
TANTALUM
* REQUIRED FOR STABILITY
LT1584: C2 = 22µF,
LT1585/LT1587: C2 = 10µF
1585 TA01
NOTE: MICROPROCESSOR APPLICATIONS WITH LOAD TRANSIENTS OF 3.8A REQUIRE
OUTPUT DECOUPLING CAPACITANCE > 1300µF ON FIXED VOLTAGE PARTS TO ACHIEVE
< 50mV OF DEVIATION FROM NOMINAL OUTPUT. CONSULT FACTORY FOR DETAILS
0
I
FULL LOAD
OUTPUT CURRENT (A)
1585 TA02
158457a
1
LT1584/LT1585/LT1587
W W
U W
ABSOLUTE AXI U RATI GS
(Note 1)
Storage Temperature Range ................. –65°C to 150°C
VIN ............................................................................. 7V
Operating Junction Temperature Range
C-Grade
Lead TemperaU ture (Soldering, 10 sec).................. 300°C
U U
PRECONDITIONI G
Control Section ................................... 0°C to 125°C
Power Transistor ................................. 0°C to 150°C 100% Thermal Limit Functional Test
I-Grade
Control Section ............................... –40°C to 125°C
Power Transistor ............................. –40°C to 150°C
W U
U
PACKAGE/ORDER INFORMATION
ORDER PART
NUMBER
ORDER PART
NUMBER
FRONT VIEW
FRONT VIEW
3
LT1585CM
LT1587CM
LT1584CT
LT1585CT
LT1587CT
V
V
IN
3
2
1
V
V
IN
TAB
IS
OUTPUT
TAB
IS
OUTPUT
2
1
OUT
OUT
ADJ
ADJ
M PACKAGE
3-LEAD PLASTIC DD
T PACKAGE
3-LEAD PLASTIC TO-220
θJA = 30°C/W*
θJA = 50°C/W
LT1585CM-3.3
LT1585CM-3.38
LT1585CM-3.45
LT1585CM-3.6
LT1587CM-3.3
LT1587CM-3.45
LT1587CM-3.6
LT1584CT-3.3
LT1584IT-3.3
LT1585CT-3.3
LT1587CT-3.3
LT1584CT-3.38
LT1585CT-3.38
LT1584CT-3.45
LT1585CT-3.45
LT1587CT-3.45
LT1584CT-3.6
LT1585CT-3.6
LT1587CT-3.6
FRONT VIEW
FRONT VIEW
3
V
V
IN
3
2
1
V
V
IN
TAB
IS
OUTPUT
TAB
IS
OUTPUT
2
1
OUT
OUT
GND
GND
M PACKAGE
3-LEAD PLASTIC DD
T PACKAGE
3-LEAD PLASTIC TO-220
θJA = 30°C/W*
θJA = 50°C/W
* With package soldered to 0.5 square inch copper area over backside
ground plane or internal power plane. θJA can vary from 20°C/W to
>40°C/W with other mounting techniques.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
158457a
2
LT1584/LT1585/LT1587
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
1.5V ≤ (V – V ) ≤ 3V, 10mA ≤ I ≤ 7A
OUT
MIN
TYP
MAX
UNITS
Reference Voltage LT1584
LT1585
IN
OUT
1.5V ≤ (V – V ) ≤ 5.75V, 10mA ≤ I
≤ 4.6A, T ≥ 25°C
IN
OUT
OUT
OUT
OUT
J
1.5V ≤ (V – V ) ≤ 5.75V, 10mA ≤ I
≤ 4A, T < 25°C
IN
OUT
J
LT1587
1.5V ≤ (V – V ) ≤ 5.75V, 10mA ≤ I
≤ 3A
●
1.225 (– 2%)
1.250 1.275 (+2%)
V
IN
OUT
Output Voltage
LT1584-3.3
4.75V ≤ V ≤ 6.3V, 0mA ≤ I
≤ 7A
OUT
IN
LT1585-3.3
4.75V ≤ V ≤ 7V, 0mA ≤ I
≤ 4.6A, T ≥ 25°C
IN
OUT
OUT
OUT
J
4.75V ≤ V ≤ 7V, 0mA ≤ I
≤ 4A, T < 25°C
≤ 3A
IN
J
LT1587-3.3
4.75V ≤ V ≤ 7V, 0mA ≤ I
●
●
3.235 (– 2%)
3.313 (– 2%)
3.300 3.365 (+2%)
3.380 3.465 (+2.5%)
V
V
IN
LT1584-3.38
LT1585-3.38
4.75V ≤ V ≤ 6.38V, 0mA ≤ I
≤ 7A
IN
OUT
4.75V ≤ V ≤ 7V, 0mA ≤ I
≤ 4A
IN
OUT
LT1584-3.45
LT1585-3.45
LT1587-3.45
4.75V ≤ V ≤ 6.45V, 0mA ≤ I
≤ 7A
IN
OUT
4.75V ≤ V ≤ 7V, 0mA ≤ I
≤ 4A
IN
OUT
OUT
4.75V ≤ V ≤ 7V, 0mA ≤ I
≤ 3A
●
3.381 (– 2%)
3.450 3.519 (+2%)
V
IN
LT1584-3.6
LT1584-3.6
LT1584-3.6
LT1584-3.6
4.75V ≤ V ≤ 7V, 0mA ≤ I
≤ 6A
≤ 6A
●
●
●
●
3.400 (– 5.5%) 3.600 3.672 (+2%)
V
V
V
V
IN
OUT
OUT
4.80V ≤ V ≤ 7V, 0mA ≤ I
3.450 (– 4%)
3.600 3.672 (+2%)
IN
4.80V ≤ V ≤ 6.6V, 0mA ≤ I
≤ 7A
3.431 (– 4.7%) 3.600 3.672 (+2%)
3.481 (– 3.3%) 3.600 3.672 (+2%)
IN
OUT
OUT
4.85V ≤ V ≤ 6.6V, 0mA ≤ I
≤ 7A
IN
LT1585/7-3.6
LT1585/7-3.6
LT1585-3.6
LT1585-3.6
4.75V ≤ V ≤ 7V 0mA ≤ I
≤ 3A
●
●
●
●
3.474 (– 3.5%) 3.600 3.672 (+2%)
V
V
V
V
IN
,
OUT
OUT
OUT
OUT
4.80V ≤ V ≤ 7V 0mA ≤ I
≤ 3A
≤ 4A
≤ 4A
3.528 (– 2%)
3.450 (– 4%)
3.492 (– 3%)
3.600 3.672 (+2%)
3.600 3.672 (+2%)
3.600 3.672 (+2%)
IN
,
4.80V ≤ V ≤ 7V 0mA ≤ I
IN
,
4.85V ≤ V ≤ 7V 0mA ≤ I
IN
,
Line Regulation
(Notes 2, 3)
LT1584/5/7
2.75V ≤ V ≤ 7V, I
= 10mA
= 0mA
= 0mA
= 0mA
= 0mA
IN
OUT
OUT
OUT
OUT
OUT
LT1584/5/7-3.3
LT1584/5-3.38
4.75V ≤ V ≤ 7V, I
IN
4.75V ≤ V ≤ 7V, I
IN
LT1584/5/7-3.45 4.75V ≤ V ≤ 7V, I
LT1584/5/7-3.6
IN
4.75V ≤ V ≤ 7V, I
●
0.005
0.2
%
IN
Load Regulation
(Notes 2, 3, 4)
LT1584/5/7
(V – V ) = 3V, T = 25°C, 10mA ≤ I
≤ I
N
IN
IN
IN
IN
OUT
J
OUT FULL LOAD
LT1584/5/7-3.3
LT1584/5-3.38
LT1584/5/7-3.45
LT1584/5/7-3.6
V
V
V
V
= 5V, T = 25°C, 0mA ≤ I
≤ I
≤ I
≤ I
J
J
OUT
OUT
OUT
FULL LOAD
FULL LOAD
FULL LOAD
= 5V, T = 25°C, 0mA ≤ I
= 5V, T = 25°C, 0mA ≤ I
J
= 5.25V, T = 25°C, 0mA ≤ I
≤ I
0.05
0.05
0.3
0.5
%
%
J
OUT
FULL LOAD
●
●
Dropout Voltage
LT1585/7
∆V = 1%, I
= 3A
= 3A
= 3A
= 3A
= 3A
REF
OUT
LT1585/7-3.3
LT1585-3.38
LT1585/7-3.45
LT1585/7-3.6
∆V
∆V
∆V
∆V
= 1%, I
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
= 1%, I
= 1%, I
= 1%, I
1.150
1.200
1.300
1.400
V
V
LT1585
∆V = 1%, I
= 4.6A, T ≥ 25°C
J
REF
OUT
OUT
∆V = 1%, I
= 4A, T < 25°C
J
REF
LT1585-3.3
∆V
∆V
∆V
∆V
∆V
= 1%, I
= 4.6A, T ≥ 25°C
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
J
= 1%, I
= 1%, I
= 1%, I
= 1%, I
= 4A, T < 25°C
J
LT1585-3.38
LT1585-3.45
LT1585-3.6
= 4A
= 4A
= 4A
●
LT1584
∆V = 1%, I
= 6A
= 6A
= 6A
= 6A
= 6A
REF
OUT
LT1584-3.3
LT1584-3.38
LT1584-3.45
LT1584-3.6
∆V
∆V
∆V
∆V
= 1%, I
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
= 1%, I
= 1%, I
= 1%, I
T ≥ 25°C
●
●
●
1.200
1.200
1.200
1.300
1.350
1.450
V
V
V
J
T < 25°C
J
LT1584IT-3.3
T < 25°C
J
158457a
3
LT1584/LT1585/LT1587
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
∆V = 1%, I
MIN
TYP
MAX
UNITS
Dropout Voltage
LT1584
= 7A
= 7A
= 7A
= 7A
= 7A
REF
OUT
LT1584-3.3
LT1584-3.38
LT1584-3.45
LT1584-3.6
LT1584IT-3.3
∆V
∆V
∆V
∆V
= 1%, I
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
= 1%, I
= 1%, I
= 1%, I
●
●
1.250
1.250
1.400
1.500
V
V
T < 25°C
J
Current Limit
(Note 4)
LT1584
(V – V ) = 3V
IN OUT
LT1584-3.3
LT1584-3.38
LT1584-3.45
LT1584-3.6
(V – V ) = 3V
IN OUT
(V – V ) = 3V
IN
OUT
(V – V ) = 3V
IN
OUT
(V – V ) = 3V
●
7.100
8.250
A
IN
OUT
LT1585
LT1585-3.3
(V – V ) = 5.5V
IN OUT
(V – V ) = 5.5V
IN OUT
T ≥ 25°C
●
●
4.600
4.100
5.25
5.25
A
A
J
T < 25°C
J
LT1585-3.38
LT1585-3.45
LT1585-3.6
(V – V ) = 5.5V
IN OUT
(V – V ) = 5.5V
IN
OUT
(V – V ) = 5.5V
●
4.100
3.100
4.750
A
IN
OUT
LT1587
(V – V ) = 5.5V
IN OUT
LT1587-3.3
LT1587-3.45
LT1587-3.6
(V – V ) = 5.5V
IN OUT
(V – V ) = 5.5V
IN
OUT
(V – V ) = 5.5V
●
●
3.750
55
A
IN
OUT
Adjust Pin Current LT1584/5/7
Adjust Pin Current LT1584
120
µA
1.5V ≤ (V – V ) ≤ 3V, 10mA ≤ I
≤ I
OUT
IN
OUT
OUT
FULL LOAD
Change (Note 4)
LT1585/7
1.5V ≤ (V – V ) ≤ 5.75V, 10mA ≤ I
≤ I
●
●
0.2
2
5
µA
IN
OUT
FULL LOAD
Minimum
Load Current
LT1584/5/7
1.5V ≤ (V – V ) ≤ 5.75V
10
mA
IN
OUT
Quiescent Current LT1584/5/7-3.3
LT1584/5-3.38
V
V
V
V
V
= 5V
= 5V
= 5V
= 5V
= 5V
IN
IN
IN
IN
IN
LT1584/5/7-3.45
LT1584/5/7-3.6
LT1584IT-3.3
●
●
8
8
13
15
mA
mA
Ripple Rejection
LT1584
f = 120Hz, C
f = 120Hz, C
f = 120Hz, C
f = 120Hz, C
f = 120Hz, C
f = 120Hz, C
= 25µF Tant., (V – V ) = 2.5V, I
= 7A
OUT
OUT
OUT
OUT
OUT
OUT
IN
OUT
OUT
LT1584-3.3
LT1584-3.38
LT1584-3.45
LT1584-3.6
LT1585
= 25µF Tant., V = 5.8V, I
= 7A
IN
IN
OUT
OUT
OUT
= 25µF Tant., V = 5.88V, I
= 7A
= 25µF Tant., V = 5.95V, I
= 7A
IN
= 25µF Tant., V = 6.1V, I
= 7A
IN
OUT
= 25µF Tant., (V – V ) = 3V,
IN
OUT
I
= 4.6A, T ≥ 25°C
J
OUT
f = 120Hz, C
= 25µF Tant., (V – V ) = 3V,
IN OUT
OUT
I
= 4A, T < 25°C
J
OUT
LT1585-3.3
f = 120Hz, C
= 25µF Tant., V = 6.3V,
OUT IN
I
= 4.6A, T ≥ 25°C
J
OUT
f = 120Hz, C
= 25µF Tant., V = 6.3V,
IN
OUT
I
= 4A, T < 25°C
J
OUT
LT1585-3.38
LT1585-3.45
LT1585-3.6
LT1587
LT1587-3.3
LT1587-3.45
LT1587-3.6
f = 120Hz, C
f = 120Hz, C
f = 120Hz, C
f = 120Hz, C
f = 120Hz, C
f = 120Hz, C
f = 120Hz, C
= 25µF Tant., V = 6.38V, I
= 4A
= 4A
OUT
OUT
OUT
OUT
OUT
OUT
OUT
IN
OUT
OUT
= 25µF Tant., V = 6.45V, I
IN
IN
= 25µF Tant., V = 6.6V, I
= 4A
OUT
= 25µF Tant., (V – V ) = 3V, I = 3A
OUT
IN
OUT
= 25µF Tant., V = 6.3V, I
= 3A
OUT
IN
= 25µF Tant., V = 6.45V, I
= 3A
OUT
IN
= 25µF Tant., V = 6.6V, I
= 3A
OUT
●
60
72
dB
IN
158457a
4
LT1584/LT1585/LT1587
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
T = 25°C, 30ms pulse
MIN
TYP
MAX
UNITS
Thermal Regulation
LT1584/5/7
LT1584/5/7-3.3 T = 25°C, 30ms pulse
A
A
LT1584/5-3.38
LT1584/5/7-3.45 T = 25°C, 30ms pulse
T = 25°C, 30ms pulse
A
A
LT1584/5/7-3.6 T = 25°C, 30ms pulse
0.004
0.5
0.02
1.0
%/W
%
A
Temperature Stability
Long-Term Stability
RMS Output Noise
●
T = 125°C, 1000 Hrs.
A
0.03
0.003
%
T = 25°C, 10Hz ≤ f ≤ 10kHz
A
%
(% of V
)
OUT
Thermal Resistance
Junction to Case
LT1584
LT1585
LT1585
LT1587
LT1587
T Package: Control Circuitry/Power Transistor
T Package: Control Circuitry/Power Transistor
M Package: Control Circuitry/Power Transistor
T Package: Control Circuitry/Power Transistor
M Package: Control Circuitry/Power Transistor
0.65/2.7
0.7/3.0
0.7/3.0
0.7/3.0
0.7/3.0
°C/W
°C/W
°C/W
°C/W
°C/W
maximum output power will not be available over the full input/output
voltage range.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 4: I
is defined as the maximum value of output load current
Note 2: See thermal regulation specifications for changes in output voltage
due to heating effects. Load and line regulation are measured at a constant
junction temperature by low duty cycle pulse testing.
FULL LOAD
as a function of input-to-output voltage. I
is equal to 7A for the
FULL LOAD
LT1584, 4.6A at T ≥ 25°C and 4A at T < 25°C for the LT1585/LT1585-3.3
J
J
and 3A for the LT1587. The remaining LT1585 fixed voltage versions are
4A. The LT1585 and LT1587 have constant current limit with changes in
input-to-output voltage. The LT1584 has variable current limit which
decreases about 4A as input-to-output voltage increases from 3V to 7V.
Note 3: Line and load regulation are guaranteed up to the maximum power
dissipation (25W for the LT1584 in T package, 26.5W for the LT1585 in T
package, 18W for the LT1587 in T package). Power dissipation is
determined by input/output differential and the output current. Guaranteed
158457a
5
LT1584/LT1585/LT1587
W
U
TYPICAL PERFORMANCE CHARACTERISTICS
LT1584 Dropout Voltage
vs Output Current
LT1584 Short-Circuit Current
vs Input/Output Differential
LT1584 Load Regulation
vs Temperature
10
8
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.10
0.05
∆I = 7A
GUARANTEED
TEST POINTS
T = –5°C
0
6
T = 125°C
T = 25°C
T = –5°C
–0.05
–0.10
–0.15
–0.20
T = 125°C
T = 25°C
4
MINIMUM
2
0
0
2
3
4
5
6
7
–75 –50 –25
0
25 50 75 100 125 150 175
0
2
3
4
5
6
7
1
1
INPUT/OUTPUT DIFFERENTIAL (V)
TEMPERATURE (°C)
OUTPUT CURRENT (A)
LT1584 • TPC02
LT1584 • TPC03
LTC1584 • TPC01
LT1585 Dropout Voltage
vs Output Current
LT1585 Short-Circuit Current
vs Temperature
LT1585 Load Regulation
vs Temperature
6.0
5.5
5.0
4.5
4.0
0.10
0.05
1.5
1.4
∆I = 4.6A
GUARANTEED
TEST POINTS
1.3
1.2
T = –5°C
0
1.1
1.0
T = 125°C
–0.05
–0.10
–0.15
–0.20
T = 25°C
0.9
0.8
0.7
0.6
0.5
–75 –50 –25
0
25 50 75 100 125 150 175
–75 –50 –25
0
25 50 75 100 125 150 175
0
1
2
3
4
5
TEMPERATURE (°C)
TEMPERATURE (°C)
OUTPUT CURRENT (A)
LT1584 • TPC03
LT1584 • TPC05
LT1585 • TPC04
LT1587 Dropout Voltage
vs Output Current
LT1587 Short-Circuit Current
vs Temperature
LT1587 Load Regulation
vs Temperature
5.0
4.5
4.0
3.5
3.0
0.10
0.05
1.5
1.4
∆I = 3A
GUARANTEED
TEST POINTS
1.3
1.2
1.1
T = –5°C
0
–0.05
–0.10
–0.15
–0.20
1.0
0.9
T = 25°C
T = 125°C
0.8
0.7
0.6
0.5
–75 –50 –25
0
25 50 75 100 125 150 175
–75 –50 –25
0
25 50 75 100 125 150 175
0
0.5
1.5
2.0
2.5
3.0
1.0
TEMPERATURE (°C)
TEMPERATURE (°C)
OUTPUT CURRENT (A)
LT1584 • TPC09
LT1584 • TPC05
LT1584 • TPC07
158457a
6
LT1584/LT1585/LT1587
W
U
TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage vs Temperature
Using Adjustable LT1584/5/7
LT1584/5/7-3.XX Output Voltage
vs Temperature
LT1584/5/7 Reference Voltage
vs Temperature
1.275
1.270
1.265
1.260
3.70
3.65
3.60
3.55
3.50
3.45
3.40
3.35
3.30
3.25
3.70
3.65
V
SET WITH 1% RESISTORS
OUT
V
= 3.6V
V
= 3.6V
OUT
OUT
3.60
3.55
3.50
3.45
3.40
3.35
3.30
3.25
1.255
1.250
V
V
= 3.45V
= 3.38V
V
V
= 3.45V
= 3.38V
OUT
OUT
OUT
OUT
1.245
1.240
1.235
1.230
V
= 3.3V
V
= 3.3V
OUT
OUT
1.255
3.20
3.20
–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)
LT1584 • TPC10
LT1584 • TPC11
LT1584 • TPC12
LT1584/5/7 Minimum Load
Current vs Temperature
LT1584/5/7 Adjust Pin Current
vs Temperature
LT1584/5/7-3.XX Quiescent
Current vs Temperature
5
4
3
2
1
0
100
90
80
70
60
50
40
30
20
10
0
13
12
11
10
9
8
7
6
5
4
3
–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)
LT1584 • TPC13
LT1584 • TPC14
LT1584 • TPC15
LT1584/5/7 Ripple Rejection
vs Frequency
LT1585/7 Maximum Power
Dissipation*
LT1584 Maximum Power
Dissipation*
90
80
70
60
50
40
30
20
10
0
30
25
20
15
30
25
20
15
10
5
LT1585
LT1587
10
5
LT1584: (V – V ) ≤ 2.5V
IN
OUT
LT1585/87: (V – V ) ≤ 3V
IN
RIPPLE
OUT FULL LOAD
OUT
0.5V ≤ V
≤ 2V
I
= I
0
0
10
100
1k
10k
100k
50 60 70 80 90 100 110 120 130 140 150
CASE TEMPERATURE (˚C)
50 60 70 80 90 100 110 120 130 140 150
FREQUENCY (Hz)
CASE TEMPERATURE (°C)
LT1584 • TPC16
LT1584 • TPC17
LT1584 • TPC18
*AS LIMITED BY MAXIMUM JUNCTION TEMPERATURE
*AS LIMITED BY MAXIMUM JUNCTION TEMPERATURE
158457a
7
LT1584/LT1585/LT1587
W
W
SI PLIFIED SCHE ATIC
V
IN
+
–
THERMAL
LIMIT
V
OUT
ADJ
GND
LT1584 • BD
FOR FIXED VOLTAGE DEVICE
158457a
8
LT1584/LT1585/LT1587
U
W U U
APPLICATIONS INFORMATION
General
LT1585/LT1587 frequency compensation optimizes fre-
quency response with low ESR capacitors. In general, use
capacitors with an ESR of less than 1Ω.
The LT1584/LT1585/LT1587 family of three-terminal
regulatorsiseasytouseandhasalltheprotectionfeatures
expected in high performance linear regulators. The de-
vices are short-circuit protected, safe-area protected, and
provide thermal shutdown to turn off the regulators
shouldthejunctiontemperatureexceedabout150°C. The
LT1584/LT1585/LT1587 family includes adjustable and
fixed voltage versions.
On the adjustable LT1584/LT1585/LT1587, bypassing the
adjust terminal improves ripple rejection and transient
response. Bypassing the adjust pin increases the required
output capacitor value. The value of 22µF tantalum or
100µF aluminum covers all cases of bypassing the adjust
terminal. With no adjust pin bypassing, smaller values of
capacitors provide equally good results.
These ICs are pin compatible with the LT1083/LT1084/
LT1085 family of linear regulators but offer lower dropout
voltage and faster transient response. The trade-off for this
improved performance is a 7V maximum supply voltage.
Similar to the LT1083/LT1084/LT1085 family, the LT1584/
LT1585/LT1587 regulators require an output capacitor for
stability. However, the improved frequency compensation
permitstheuseofcapacitorswithmuchlowerESRwhilestill
maintaining stability. This is critical in addressing the needs
of modern, low voltage, high speed microprocessors.
Normally, capacitor values on the order of several hundred
microfarads are used on the output of the regulators to
ensure good transient response with heavy load current
changes. Output capacitance can increase without limit
andlargervaluesofoutputcapacitancefurtherimprovethe
stability and transient response of the LT1584/LT1585/
LT1587 family.
Large load current changes are exactly the situation pre-
sented by modern microprocessors. The load current step
contains higher order frequency components that the
output decoupling network must handle until the regulator
throttles to the load current level. Capacitors are not ideal
elements and contain parasitic resistance and inductance.
These parasitic elements dominate the change in output
voltage at the beginning of a transient load step change.
The ESR of the output capacitors produces an instanta-
neous step in output voltage (∆V = ∆I × ESR). The ESL of
the output capacitors produces a droop proportional to the
rate of change of output current (V = L × ∆I/∆t). The output
capacitance produces a change in output voltage propor-
tional to the time until the regulator can respond (∆V = ∆t
× ∆I/C). These transient effects are illustrated in Figure 1.
Current generation microprocessors cycle load current
from almost zero to amps in tens of nanoseconds. Output
voltage tolerances are tighter and include transient re-
sponse as part of the specification. The LT1584/LT1585/
LT1587 family is specifically designed to meet the fast
current load-step requirements of these microprocessors
and saves total cost by needing less output capacitance in
order to maintain regulation.
Stability
The circuit design in the LT1584/LT1585/LT1587 family
requires the use of an output capacitor as part of the
frequency compensation. For all operating conditions, the
addition of a 22µF solid tantalum or a 100µF aluminum
electrolytic on the output ensures stability. Normally, the
LT1584/LT1585/LT1587 can use smaller value capacitors.
Many different types of capacitors are available and have
widely varying characteristics. These capacitors differ in
capacitor tolerance (sometimes ranging up to ±100%),
equivalent series resistance, equivalent series inductance,
and capacitance temperature coefficient. The LT1584/
ESR
EFFECTS
ESL
CAPACITANCE
EFFECTS
EFFECTS
LT1584 • F01
V
t
∆I
C
SLOPE,
=
POINT AT WHICH REGULATOR
TAKES CONTROL
Figure 1
158457a
9
LT1584/LT1585/LT1587
U
W U U
APPLICATIONS INFORMATION
TheuseofcapacitorswithlowESR,lowESL,andgoodhigh
frequency characteristics is critical in meeting the output
voltage tolerances of these high speed microprocessors.
These requirements dictate a combination of high quality,
surface mount tantalum capacitors and ceramic capaci-
tors. The location of the decoupling network is critical to
transient response performance. Place the decoupling
networkascloseaspossibletotheprocessorpinsbecause
trace runsfromthe decouplingcapacitorstotheprocessor
pins are inductive. The ideal location for the decoupling
network is actually inside the microprocessor socket cav-
ity. In addition, use large power and ground plane areas to
minimize distribution drops.
put pin and the input pin or between the adjust pin and the
output pin to prevent die overstress.
On the adjustable LT1584/LT1585/LT1587, internal resis-
tors limit internal current paths on the adjust pin. There-
fore, even with bypass capacitors on the adjust pin, no
protection diode is needed to ensure device safety under
short-circuit conditions.
A protection diode between the input and output pins is
usuallynotneeded.Aninternaldiodebetweentheinputand
output pins on the LT1584/LT1585/LT1587 family can
handle microsecond surge currents of 50A to 100A. Even
with large value output capacitors it is difficult to obtain
those values of surge currents in normal operation. Only
with large values of output capacitance, such as 1000µF to
5000µF, and with the input pin instantaneously shorted to
ground can damage occur. A crowbar circuit at the input of
the LT1584/LT1585/LT1587 can generate those levels of
current, and a diode from output to input is then recom-
mended. This is shown in Figure 2. Usually, normal power
supply cycling or system “hot plugging and unplugging”
will not generate current large enough to do any damage.
Apossiblestabilityproblemthatoccursinmonolithiclinear
regulatorsiscurrentlimitoscillations.TheLT1585/LT1587
essentially have a flat current limit over the range of input
supply voltage. The lower current limit rating and 7V
maximum supply voltage rating for these devices permit
this characteristic. Current limit oscillations are typically
nonexistent, unless the input and output decoupling ca-
pacitors for the regulators are mounted several inches
from the terminals. The LT1584 differs from the LT1585/
LT1587 and provides current limit foldback as input-to-
output differential voltage increases. This safe-area char-
acteristic exhibits a negative impedance because increas-
ing voltage causes output current to decrease. Negative
resistance during current limit is not unique to the LT1584
devices and is present on many power IC regulators. The
valueofthenegativeresistanceisafunctionofhowfastthe
current limit is folded back as input-to-output voltage
increases. This negative resistance can react with capaci-
tors and inductors on the input and output to cause
oscillation during current limit. Depending on the values of
seriesresistances,theoverallsystemmayendupunstable.
However, the oscillation causes no problem and the IC
remainsprotected. Ingeneral, ifthisproblemoccursandis
unacceptable,increasingtheamountofoutputcapacitance
helps dampen the system.
The adjust pin can be driven on a transient basis ±7V with
respect to the output, without any device degradation. As
with any IC regulator, exceeding the maximum input-to-
outputvoltagedifferentialcausestheinternaltransistorsto
break down and none of the protection circuitry is then
functional.
D1
1N4002
(OPTIONAL)
LT1584-3.3
V
IN
OUT
V
OUT
IN
+
+
+
C1
C2
GND
10µF
22µF
D1
1N4002
(OPTIONAL)
LT1584
V
IN
OUT
V
OUT
IN
Protection Diodes
+
C1
10µF
C2
22µF
ADJ
R1
In normal operation, the LT1584/LT1585/LT1587 family
does not require any protection diodes. Older three-termi-
nal regulators require protection diodes between the out-
+
LT1584 • F02
R2
C
ADJ
Figure 2
158457a
10
LT1584/LT1585/LT1587
U
W U U
APPLICATIONS INFORMATION
Overload Recovery
adjust pin capacitor should be 22µF. At 10kHz, only 0.22µF
is needed.
The LT1584 devices have safe-area protection similar to
the LT1083/LT1084/LT1085. The safe-area protection de-
creases current limit as input-to-output voltage increases.
This behavior keeps the power transistor inside a safe
operating region for all values of input-to-output voltage.
The LT1584 protection circuitry provides some output
current at all values of input-to-output voltage up to the 7V
maximum supply voltage. When power is first applied, the
inputvoltagerisesandtheoutputvoltagefollowstheinput.
The input-to-output voltage remains small and the regula-
tor can supply large output currents. This action permits
the regulator to start-up into very heavy loads.
Output Voltage
TheLT1584/LT1585/LT1587adjustableregulatorsdevelop
a 1.25V reference voltage between the output pin and the
adjust pin (see Figure 3). Placing a resistor R1 between
these two terminals causes a constant current to flow
through R1 and down through R2 to set the overall output
voltage. Normally, this current is the specified minimum
loadcurrentof10mA.Thecurrentoutoftheadjustpinadds
to the current from R1 and is typically 55µA. Its output
voltage contribution is small and only needs consideration
when very precise output voltage setting is required.
With higher input voltages, a problem can occur where the
removal of an output short does not permit the output
voltage to recover. This problem is not unique to the
LT1584 devices and is present on the LT1083/LT1084/
LT1085 family and older generation linear regulators. The
problem occurs with a heavy output load, a high input
voltage, and a low output voltage. An example is immedi-
ately after the removal of a short circuit. The load line of
such a load may intersect the output current curve at two
points. If this happens, two stable output operating points
exist for the regulator. With this double intersection, the
powersupplymayrequirecyclingdowntozeroandbackup
again to make the output recover. This situation does not
occur with the LT1585/LT1587 because no foldback cir-
cuitry is required to provide safe-area protection.
LT1584
V
IN
OUT
V
OUT
C2
22µF
IN
+
+
C1
10µF
ADJ
V
REF
R1
R2
I
ADJ
55µA
(1 + R2/R1) + I
ADJ
V
= V
REF
(R2)
OUT
LT1585 • F03
Figure 3. Basic Adjustable Regulator
Load Regulation
It is not possible to provide true remote load sensing
because the LT1584/LT1585/LT1587 are three-terminal
devices. Load regulation is limited by the resistance of the
wire connecting the regulators to the load. Load regulation
per the data sheet specification is measured at the bottom
of the package.
Ripple Rejection
The typical curve for ripple rejection reflects values for the
LT1584/LT1585/LT1587 fixed output voltage parts be-
tween 3.3V and 3.6V. In applications that require improved
ripple rejection, use the adjustable devices. A bypass
capacitor from the adjust pin to ground reduces the output
ripple by the ratio of VOUT/1.25V. The impedance of the
adjust pin capacitor at the ripple frequency should be less
than the value of R1 (typically in the range of 100Ω to
120Ω) in the feedback divider network in Figure 2. There-
fore, the value of the required adjust pin capacitor is a
function of the input ripple frequency. For example, if R1
equals 100Ω and the ripple frequency equals 120Hz, the
For fixed voltage devices, negative side sensing is a true
Kelvin connection with the ground pin of the device re-
turned to the negative side of the load. This is illustrated in
Figure 4.
R
P
PARASITIC
LINE RESISTANCE
LT1584-3.3
IN OUT
V
IN
GND
R
L
LT1585 • F04
Figure 4. Connection for Best Load Regulation
158457a
11
LT1584/LT1585/LT1587
U
W U U
APPLICATIONS INFORMATION
For adjustable voltage devices, negative side sensing is a
trueKelvinconnectionwiththebottomoftheoutputdivider
returned to the negative side of the load. The best load
regulation is obtained when the top of resistor divider R1
connects directly to the regulator output and not to the
load. Figure 5 illustrates this point. If R1 connects to the
load, the effective resistance between the regulator and the
load is:
Thermal Considerations
The LT1584/LT1585/LT1587 family protects the device
under overload conditions with internal power and thermal
limiting circuitry. However, for normal continuous load
conditions, do not exceed maximum junction temperature
ratings. It is important to consider all sources of thermal
resistance from junction-to-ambient. These sources in-
clude the junction-to-case resistance, the case-to-heat
sink interface resistance, and the heat sink resistance.
Thermal resistance specifications have been developed to
moreaccuratelyreflectdevicetemperatureandensuresafe
operating temperatures. The electrical characteristics sec-
tion provides a separate thermal resistance and maximum
junction temperature for both the control circuitry and the
power transistor. Older regulators, with a single junction-
to-case thermal resistance specification, use an average of
the two values provided here and allow excessive junction
temperatures under certain conditions of ambient tem-
perature and heat sink resistance. Calculate the maximum
junction temperature for both sections to ensure that both
thermal limits are met.
RP × (1 + R2/R1), RP = Parasitic Line Resistance
The connection shown in Figure 5 does not multiply RP by
the divider ratio. As an example, RP is about four milliohms
perfootwith16-gaugewire.Thistranslatesto4mVperfoot
at 1A load current. At higher load currents, this drop
represents a significant percentage of the overall regula-
tion. It is important to keep the positive lead between the
regulator and the load as short as possible and to use large
wire or PC board traces.
R
P
PARASITIC
LINE RESISTANCE
LT1584
ADJ
V
IN
IN
OUT
Junction-to-case thermal resistance is specified from the
IC junction to the bottom of the case directly below the die.
This is the lowest resistance path for heat flow. Proper
mounting ensures the best thermal flow from this area of
the package to the heat sink. Linear Technology strongly
recommends thermal compound at the case-to-heat sink
interface. Use a thermally conductive spacer if the case of
the device must be electrically isolated and include its
R1*
R2*
R
L
*CONNECT R1 TO CASE
CONNECT R2 TO LOAD
LT1584 • F05
Figure 5. Connection for Best Load Regulation
158457a
12
LT1584/LT1585/LT1587
U
W U U
APPLICATIONS INFORMATION
contribution to the total thermal resistance. Please consult
“Mounting Considerations for Power Semiconductors”
1990 Linear Applications Handbook, Volume I, Pages
RR3-1 to RR3-20. The output connects to the case of all
devices in the LT1584/LT1585/LT1587 series.
Junction temperature will be equal to:
TJ = TA + PD(θHEAT SINK + θCASE-TO-HEAT SINK + θJC)
For the Control Section:
TJ = 70°C + 9W (4°C/W + 1°C/W + 0.7°C/W) = 121.3°C
121.3°C < 125°C = TJMAX (Control Section Commercial
range)
For example, using an LT1585CT-3.3 (TO-220, commer-
cial) and assuming:
For the Power Transistor:
VIN(Max Continuous) = 5.25V (5V + 5%), VOUT = 3.3V,
IOUT = 4.6A
TJ = 70°C + 9W (4°C/W + 1°C/W + 3°C/W) = 142°C
142°C < 150°C = TJMAX (Power Transistor Commercial
Range)
TA = 70°C, θHEAT SINK = 4°C/W
θCASE-TO-HEAT SINK = 1°C/W (with Thermal Compound)
Power dissipation under these conditions is equal to:
PD = (VIN – VOUT)(IOUT) = (5.25 – 3.3)(4.6) = 9W
In both cases the junction temperature is below the maxi-
mum rating for the respective sections, ensuring reliable
operation.
U
TYPICAL APPLICATIONS N
Recommended LT1587-3.45 Circuit for the Intel 486TM DX4TM Overdrive Microprocessor
PLACE AT MICROPROCESSOR SOCKET V PINS
CC
3.45V
V
IN
≥ 4.75V
IN
OUT
3A
C2
22µF
10V
C1
10µF
10V
C3 TO C6
47µF
10V
+
+
+
LT1587-3.45
C7 TO C15
0.1µF
C16 TO C24
0.01µF
GND
LT1584 • TA03
ESR OF THE 47µF IS <0.1Ω
Minimum Parts Count LT1585 Adjustable Circuit
for the Intel Pentium VRE Processor
LT1585 Transient Response
for 3.8A Load Current Step*
THERMALLOY
PLACE IN MICROPROCESSOR
7020B-MT
SOCKET CAVITY
VOUT
50mV/DIV
3.50V
4.6A
4.75V TO
5.25V
IN
OUT
LT1585CT
C1 TO C3
220µF
+
R1
110Ω
0.1%
C5 TO C10
100µF
C11 TO C20
1µF
+
10V
ADJ
IOUT
2A/DIV
16V
10V
AVX TPS
3 EACH
AVX Y5V 0805
10 EACH
AVX TPS
6 EACH
C4
330nF
16V
R2
197Ω
0.1%
1584/5/7 TA04
LT1584 • TA05
100µs/DIV
AVX CORP. (803) 448-9411
AVX X7R 0805
THERMALLOY INC. (214) 243-4321
DO NOT SUBSTITUTE COMPONENTS.
*TRANSIENT RESPONSE MEASURED WITH AN INTEL
POWER VALIDATOR. VOUT IS MEASURED AT THE
POWER VALIDATOR
486 and DX4 are trademarks of Intel Corporation.
158457a
13
LT1584/LT1585/LT1587
U W
U
PACKAGE I FOR ATIO
M Package
3-Lead Plastic DD Pak
(Reference LTC DWG # 05-08-1460)
.060
(1.524)
TYP
.390 – .415
(9.906 – 10.541)
.060
(1.524)
.165 – .180
(4.191 – 4.572)
.256
(6.502)
.045 – .055
(1.143 – 1.397)
15°
+.008
.004
–.004
.060
(1.524)
.183
(4.648)
.330 – .370
(8.382 – 9.398)
.059
(1.499)
+0.203
–0.102
0.102
(
)
.095 – .115
(2.413 – 2.921)
.075
(1.905)
.100
(2.54)
BSC
.050 ± .012
(1.270 ± 0.305)
.300
(7.620)
+.012
.143
.013 – .023
(0.330 – 0.584)
–.020
.050
(1.270)
+0.305
3.632
BOTTOM VIEW OF DD PAK
HATCHED AREA IS SOLDER PLATED
COPPER HEAT SINK
(
)
–0.508
.420
.276
.080
.420
.350
.325
.205
.565
.565
.320
.090
.090
M (DD3) 0204
.100
.070
.070
.100
RECOMMENDED SOLDER PAD LAYOUT
RECOMMENDED SOLDER PAD LAYOUT
FOR THICKER SOLDER PASTE APPLICATIONS
NOTE:
1. DIMENSIONS IN INCH/(MILLIMETER)
2. DRAWING NOT TO SCALE
158457a
14
LT1584/LT1585/LT1587
U W
U
PACKAGE I FOR ATIO
T Package
3-Lead Plastic TO-220
(Reference LTC DWG # 05-08-1420)
.147 – .155
(3.734 – 3.937)
DIA
.165 – .180
(4.191 – 4.572)
.390 – .415
(9.906 – 10.541)
.045 – .055
(1.143 – 1.397)
.230 – .270
(5.842 – 6.858)
.570 – .620
(14.478 – 15.748)
.460 – .500
(11.684 – 12.700)
.330 – .370
(8.382 – 9.398)
.980 – 1.070
(24.892 – 27.178)
.520 – .570
(13.208 – 14.478)
.218 – .252
(5.537 – 6.401)
.013 – .023
(0.330 – 0.584)
.100
(2.540)
BSC
.095 – .115
(2.413 – 2.921)
T3 (TO-220) 0801
.050
(1.270)
TYP
.028 – .038
(0.711 – 0.965)
158457a
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 represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
15
LT1584/LT1585/LT1587
U
TYPICAL APPLICATIONS N
Guaranteed LT1584/LT1431 Circuit for the Intel 90MHz and 100MHz Pentium Processors
(Meets Intel Specifications with Worst-Case Tolerances)
THERMALLOY
7021B-MT
PLACE IN MICROPROCESSOR
SOCKET CAVITY
5V
SEE NOTE 5
3
2
V
IN
OUT
LT1584
OUT
NOTES: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTOR VALUES ARE OHMS,
1/8W, 5%
2. ALL CAPACITORS ARE 50V, 20%
3. ALL POLARIZED CAPACITORS ARE AVX
TYPE TPS OR EQUIVALENT
R4
SEE NOTE 6
C8 TO C13
100µF
C14 TO C23
1µF
C2 TO C4
220µF
10V
AVX TPS
3 EACH
+
+
R1
1k
10V
16V
ADJ
1
AVX TPS
6 EACH
AVX Y5V 0805
10 EACH
C6
0.01µF
R2
1k
SENSE
4. INPUT CAPACITANCE MAY BE REDUCED
IF THE 5V SUPPLY IS WELL BYPASSED
5. FOR 100MHz PENTIUM PROCESSOR,
INPUT VOLTAGE MUST BE AT LEAST
4.85V AT THE REGULATOR INPUT
6. FOR PENTIUM VRE PROCESSOR,
R4 NOT INSTALLED
– FOR 3.3V OUTPUT, INSTALL 0Ω JUMPER
RESISTOR R4
7. R3A TO R3E ARE B.I. TECHNOLOGY 627V100
R3D
83Ω
R3E
117Ω
SEE NOTE 7
5
6
C5
33pF
NPO
4
2
1
R3C
800Ω
COMP COL
+
+
C7
3
4
8
7
100µF
V
REF
3
2
1
10V
LT1431S
R3B
R
R
T
M
1.35k
SGND FGND
C1
0.1µF
5
6
R3A
1.15k
SGND
PGND
PGND
LT1584 • TA06
LT1584/LT1431 Transient Response
for 3.8A Load Current Step*
VOUT
50mV/DIV
*TRANSIENT RESPONSE
MEASURED WITH AN INTEL
POWER VALIDATOR.
VOUT IS MEASURED AT THE
POWER VALIDATOR
IOUT
2A/DIV
LT1584 • TA07
100µs/DIV
RELATED PARTS
PART NUMBER
LT1083/84/85
LT1083/84/85
LT1086
DESCRIPTION
COMMENTS
Fixed Output at 3.3V, 3.6V, 5V and 12V, V to 25V
7.5A, 5A, 3A Low Dropout Linear Regulators
7.5A, 5A, 3A Low Dropout Linear Regulators
1.5A Low Dropout Linear Regulator
IN
Adjustable Output with up to 30V (V – V ) Differential
IN
OUT
Both Fixed and Adjustable Versions, (V – V ) to 30V
IN
OUT
LT1521
300mA Low Dropout Linear Regulator with 12µA Quiescent
Current and Shutdown
Both Fixed and Adjustable Versions, Surface Mount
Package Available
LT1529
LT1580
3A Low Dropout Linear Regulator with 50µA Quiescent
Current and Shutdown
Both Fixed and Adjustable Versions, Surface Mount
Package Available
7A Very Low Dropout Linear Regulator
540mV Dropout at 7A, Remote Sensing
158457a
LT/TP 0404 1K REV A • PRINTED IN USA
16 LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
●
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
LINEAR TECHNOLOGY CORPORATION 1995
相关型号：
LT1529CT-3.3#06PBF
LT1529 - 3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown; Package: TO-220; Pins: 5; Temperature Range: 0°C to 70°C
Linear
LT1529CT-3.3#PBF
LT1529 - 3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown; Package: TO-220; Pins: 5; Temperature Range: 0°C to 70°C
Linear
LT1529CT-5#06PBF
LT1529 - 3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown; Package: TO-220; Pins: 5; Temperature Range: 0°C to 70°C
Linear
LT1529CT-5#PBF
LT1529 - 3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown; Package: TO-220; Pins: 5; Temperature Range: 0°C to 70°C
Linear
LT1529IQ#PBF
LT1529 - 3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown; Package: DD PAK; Pins: 5; Temperature Range: -40°C to 85°C
Linear
LT1529IQ#TRPBF
LT1529 - 3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown; Package: DD PAK; Pins: 5; Temperature Range: -40°C to 85°C
Linear
LT1529IQ-3.3#PBF
LT1529 - 3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown; Package: DD PAK; Pins: 5; Temperature Range: -40°C to 85°C
Linear
LT1529IQ-3.3#TRPBF
LT1529 - 3A Low Dropout Regulators with Micropower Quiescent Current and Shutdown; Package: DD PAK; Pins: 5; Temperature Range: -40°C to 85°C
Linear
©2020 ICPDF网 联系我们和版权申明