LD2985G-C0-AF5-R [UTC]
VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR LOW ESR CAP. COMPATIBLE;
| 型号： | LD2985G-C0-AF5-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | VERY LOW DROP AND LOW NOISE VOLTAGE REGULATOR LOW ESR CAP. COMPATIBLE 光电二极管 输出元件 调节器 |
| 文件： | 总15页 (文件大小：292K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
LD2985
LINEAR INTEGRATED CIRCUIT
VERY LOW DROP AND LOW
NOISE VOLTAGE REGULATOR
LOW ESR CAP. COMPATIBLE,
WITH INHIBIT FUNCTION
DESCRIPTION
The UTC LD2985 is a 150mA fixed output voltage regulator. The
ultra low drop voltage and the low quiescent current make them
particularly suitable for low noise, low power applications, and in
battery powered systems. In sleep mode quiescent current is less
than 1μA when INHIBIT pin is pulled low. Shutdown Logic Control
Function is available on pin 3 (TTL compatible). This means that
when the device is used as local regulator, it is possible to put a part
of the board in standby, decreasing the total power consumption.
An external capacitor, CBYP=10nF, connected between bypass
pin and GND reduce the noise to 30μVrms.
Typical applications are in cellular phone, palmtop laptop
computer, personal digital assistant (PDA), personal stereo,
camcorder and camera.
FEATURES
* Very Low Dropout Voltage (280mV at 150mA and 7mV at 1mA load)
* Very Low Quiescent current
* Output Current up to 150mA
* Logic Controlled Electronic Shutdown
* Output Voltage of 1.5, 1.8, 2.5, 2.8, 2.85, 3, 3.1, 3.2, 3.3, 3.5, 3.6, 3.8, 4, 4.7, 5V
* Internal Current and Thermal Limit
* Low Output Noise Voltage 30μVrms
ORDERING INFORMATION
Ordering Number
Package
SOT-25
Packing
Lead Free
Halogen Free
LD2985G-xx-AF5-R
LD2985L-xx-AF5-R
Tape Reel
Note: xx: Output Voltage, refer to Marking Information.
www.unisonic.com.tw
1 of 15
Copyright © 2017 Unisonic Technologies Co., Ltd
QW-R102-024.M
LD2985
LINEAR INTEGRATED CIRCUIT
MARKING INFORMATION
PACKAGE
VOLTAGE
1.5V
1.8V
2.5V
2.8V
2.85V
3.0V
3.1V
3.2V
3.3V
3.5V
3.6V
3.8V
4.0V
4.7V
5.0V
VOLTAGE CODE
MARKING
A5
A8
B5
B8
BJ
C0
C1
C2
C3
C5
C6
C8
D0
D7
E0
SOT-25
PIN CONFIGURATION
PIN DESCRIPTION
PIN NO.
PIN NAME
IN
DESCRIPTION
1
2
Input port
GND
Ground pin
Control switches ON/OFF. Inhibit is not internally pulled-up; it cannot be left floating.
Disable the device when connected to GND or to a positive voltage less than 0.18V
Bypass pin: Capacitor to be connected to GND in order to improve the thermal noise
performances.
3
INHIBIT
4
5
Bypass
OUT
Output port
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www.unisonic.com.tw
2 of 15
QW-R102-024.M
LD2985
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
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www.unisonic.com.tw
3 of 15
QW-R102-024.M
LD2985
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
ViN
RATINGS
16
UNIT
V
DC Input Voltage
INHIBIT Input Voltage
Output Current
VINH
16
V
IOUT
Internally limited
Internally limited
-40 ~ +125
-40 ~ +150
Power Dissipation
PD
Operating Junction Temperature (Note 2)
Storage Temperature
TOPR
TSTG
°C
°C
Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. This condition is only determined from design. It can't be 100% tested in mass production.
THERMAL DATA
PARAMETER
SYMBOL
RATINGS
81
UNIT
°C/W
Junction to Case
θJC
ELECTRICAL CHARACTERISTICS
(TJ=25°C, VI N=VOUT+1V, IOUT=1mA, VSHDN=2V, CI =1μF, CO=1μF, unless otherwise specified)
FOR VOUT=1.5V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
VIN=2.5V
MIN
TYP
1.5
MAX
16
UNIT
Operating Input Voltage
V
1.470
1.455
1.530
1.545
V
Output Voltage
VOUT
IOUT=1 ~ 150mA
RL=0
V
Short Circuit Current
Line Regulation
ISC
600
mA
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
△VOUT
VIN=VOUT+1V ~ 16V, IOUT=1mA
IOUT=0
30
3
1
7
IOUT=1mA
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
IOUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, CO=10μF, f=1KHz
TJ=-20 ~125°C
TJ=-20 ~125°C
TJ=-20 ~125°C, VSHDN=VIN
TJ=-20 ~125°C, VSHDN=0V
B=300Hz ~ 50KHz,
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
2
V
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IINH
eN
30
μV
CBYP=0.01μF, CO=10μF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 15
QW-R102-024.M
LD2985
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=1.8V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
VIN=2.8V
MIN
TYP
1.8
MAX UNIT
Operating Input Voltage
16
V
1.764
1.746
1.836
1.854
V
Output Voltage
VOUT
IOUT=1 ~ 150mA
RL=0
V
Short Circuit Current
Line Regulation
ISC
600
mA
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
△VOUT
VIN=VOUT+1V ~ 16V, IOUT=1mA
IOUT=0
30
3
1
7
IOUT=1mA
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
IOUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, Co=10μF, f=1KHz
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C, VSHDN=VIN
TJ=-20 ~ 125°C, VSHDN=0V
B=300Hz ~ 50KHz
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
2
V
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IiNH
eN
30
μV
CBYP=0.01μF, Co=10μF
FOR VOUT=2.5V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
VIN=3.5V
MIN
TYP
2.5
MAX UNIT
Operating Input Voltage
16
V
2.450
2.425
2.550
2.575
V
Output Voltage
VOUT
IOUT=1 ~ 150mA
RL=0
V
Short Circuit Current
Line Regulation
ISC
600
mA
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
△VOUT
VIN=VOUT+1V ~ 16V, IOUT=1mA
IOUT=0
30
3
1
7
IOUT=1mA
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
IOUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, Co=10μF, f=1KHz
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C, VSHDN=VIN
TJ=-20 ~ 125°C, VSHDN=0V
B=300Hz ~ 50KHz
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
2
V
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IINH
eN
30
μV
CBYP=0.01μF, Co=10μF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 15
QW-R102-024.M
LD2985
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=2.8V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
VIN=3.8V
MIN
TYP
2.8
MAX UNIT
Operating Input Voltage
16
V
2.744
2.716
2.856
2.884
V
Output Voltage
VOUT
IOUT=1 ~ 150mA
RL=0
V
Short Circuit Current
Line Regulation
ISC
600
mA
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
△VOUT
VIN=VOUT+1V ~ 16V, IOUT=1mA
IOUT=0
30
3
1
7
IOUT=1mA
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
I
OUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, Co=10μF, f=1KHz
TJ=-20 ~ 125°C
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
TJ=-20 ~ 125°C
2
V
TJ=-20 ~ 125°C, VSHDN=VIN
TJ=-20 ~ 125°C, VSHDN=0V
B=300Hz ~ 50KHz
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IINH
eN
30
μV
CBYP=0.01μF, Co=10μF
FOR VOUT=2.85V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
MIN
TYP
2.85
600
MAX
16
UNIT
V
Operating Input Voltage
VIN=3.85V
OUT=1 ~ 150mA
2.793
2.764
2.907
2.936
V
Output Voltage
VOUT
I
V
Short Circuit Current
Line Regulation
ISC
RL=0
mA
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
△VOUT
VIN=VOUT+1V ~ 16V, IOUT=1mA
IOUT=0
30
3
1
7
IOUT=1mA
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
IOUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, CO=10μF, f=1KHz
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C, VSHDN=VIN
TJ=-20 ~ 125°C, VSHDN=0V
B=300Hz ~ 50KHz
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
2
V
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IINH
eN
30
μV
C
BYP=0.01μF, CO=10μF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
6 of 15
QW-R102-024.M
LD2985
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=3.0V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
VIN=4.0V
MIN
TYP
3.0
MAX
16
UNIT
V
Operating Input Voltage
2.940
2.910
3.060
3.090
V
Output Voltage
VOUT
IOUT=1 ~ 150mA
RL=0
V
Short Circuit Current
Line Regulation
ISC
600
mA
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
△VOUT
VIN=VOUT+1V ~ 16V, IOUT=1mA
IOUT=0
30
3
1
7
IOUT=1mA
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
I
OUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, CO=10μF, f=1KHz
TJ=-20 ~ 125°C
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
TJ=-20 ~ 125°C
2
V
TJ=-20 ~ 125°C, VSHDN=VIN
TJ=-20 ~ 125°C, VSHDN=0V
B=300Hz ~ 50KHz
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IINH
eN
30
μV
CBYP=0.01μF, CO=10μF
FOR VOUT=3.1V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
MIN
TYP
3.1
MAX
16
UNIT
V
Operating Input Voltage
VIN=4.1V
OUT=1 ~ 150mA
RL=0
3.038
3.007
3.162
3.193
V
Output Voltage
VOUT
I
V
Short Circuit Current
Line Regulation
ISC
600
mA
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
△VOUT
VIN=VOUT+1V ~ 16V, IOUT=1mA
IOUT=0
30
3
1
7
IOUT=1mA
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
IOUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, CO=10μF, f=1KHz
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C, VSHDN=VIN
TJ=-20 ~ 125°C, VSHDN=0V
B=300Hz ~ 50KHz
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
2
V
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IINH
eN
30
μV
C
BYP=0.01μF, CO=10μF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
7 of 15
QW-R102-024.M
LD2985
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=3.2V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
VIN=4.2V
MIN
TYP
3.2
MAX
16
UNIT
V
Operating Input Voltage
3.136
3.104
3.264
3.296
V
Output Voltage
VOUT
IOUT=1 ~ 150mA
RL=0
V
Short Circuit Current
Line Regulation
ISC
600
mA
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
△VOUT
VIN=VOUT+1V ~ 16V, IOUT=1mA
IOUT=0
30
3
1
7
IOUT=1mA
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
I
OUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, CO=10μF, f=1KHz
TJ=-20 ~ 125°C
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
TJ=-20 ~ 125°C
2
V
TJ=-20 ~ 125°C, VSHDN=VIN
TJ=-20 ~ 125°C, VSHDN=0V
B=300Hz ~ 50KHz
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IINH
eN
30
μV
CBYP=0.01μF, CO=10μF
FOR VOUT=3.3V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
MIN
TYP
3.3
MAX
16
UNIT
V
Operating Input Voltage
VIN=4.3V
OUT=1 ~ 150mA
RL=0
3.234
3.201
3.366
3.399
V
Output Voltage
VOUT
I
V
Short Circuit Current
Line Regulation
ISC
600
mA
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
△VOUT
VIN=VOUT+1V ~ 16V, IOUT=1mA
IOUT=0
30
3
1
7
IOUT=1mA
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
IOUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, CO=10μF, f=1KHz
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C, VSHDN=VIN
TJ=-20 ~ 125°C, VSHDN=0V
B=300Hz ~ 50KHz
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
2
V
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IINH
eN
30
μV
C
BYP=0.01μF, CO=10μF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
8 of 15
QW-R102-024.M
LD2985
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=3.5V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
VIN=4.5V
MIN
TYP
3.5
MAX
16
UNIT
V
Operating Input Voltage
3.430
3.395
3.570
3.605
V
Output Voltage
VOUT
IOUT=1 ~ 150mA
RL=0
V
Short Circuit Current
Line Regulation
ISC
600
mA
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
△VOUT
VIN=VOUT+1V ~ 16V, IOUT=1mA
IOUT=0
30
3
1
7
IOUT=1mA
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
I
OUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, CO=10μF, f=1KHz
TJ=-20 ~ 125°C
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
TJ=-20 ~ 125°C
2
V
TJ=-20 ~ 125°C, VSHDN=VIN
TJ=-20 ~ 125°C, VSHDN=0V
B=300Hz ~ 50KHz
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IINH
eN
30
μV
CBYP=0.01μF, CO=10μF
FOR VOUT=3.6V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
MIN
TYP
3.6
MAX
16
UNIT
V
Operating Input Voltage
VIN=4.6V
OUT=1 ~ 150mA
RL=0
3.528
3.492
3.672
3.708
V
Output Voltage
VOUT
I
V
Short Circuit Current
Line Regulation
ISC
600
mA
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
△VOUT
VIN=VOUT+1V ~ 16V, IOUT=1mA
IOUT=0
30
3
1
7
IOUT=1mA
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
IOUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, CO=10μF, f=1KHz
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C, VSHDN=VIN
TJ=-20 ~ 125°C, VSHDN=0V
B=300Hz ~ 50KHz
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
2
V
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IINH
eN
30
μV
C
BYP=0.01μF, CO=10μF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
9 of 15
QW-R102-024.M
LD2985
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=3.8V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
VIN=4.8V
MIN
TYP
3.8
MAX
16
UNIT
V
Operating Input Voltage
3.724
3.686
3.876
3.914
V
Output Voltage
VOUT
IOUT=1 ~ 150mA
RL=0
V
Short Circuit Current
Line Regulation
ISC
600
mA
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
△VOUT
VIN=VOUT+1V ~ 16V, IOUT=1mA
IOUT=0
30
3
1
7
IOUT=1mA
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
I
OUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, CO=10μF, f=1KHz
TJ=-20 ~ 125°C
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
TJ=-20 ~ 125°C
2
V
TJ=-20 ~ 125°C, VSHDN=VIN
TJ=-20 ~ 125°C, VSHDN=0V
B=300Hz ~ 50KHz
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IINH
eN
30
μV
CBYP=0.01μF, CO=10μF
FOR VOUT=4.0V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
MIN
TYP
4
MAX
16
UNIT
V
Operating Input Voltage
VIN=5.0V
OUT=1 ~ 150mA
3.920
3.880
4.080
4.120
V
Output Voltage
VOUT
ISC
I
V
Short Circuit Current
RL=0
600
1
mA
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
IOUT=0
3
IOUT=1mA
7
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
IOUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, CO=10μF, f=1KHz
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C, VSHDN=VIN
TJ=-20 ~ 125°C, VSHDN=0V
B=300Hz ~ 50KHz
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
2
V
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IINH
eN
30
μV
C
BYP=0.01μF, CO=10μF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
10 of 15
QW-R102-024.M
LD2985
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
FOR VOUT=4.7V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
VIN=5.7V
MIN
TYP
4.7
MAX
16
UNIT
V
Operating Input Voltage
4.606
4.559
4.794
4.841
V
Output Voltage
VOUT
IOUT=1 ~ 150mA
RL=0
V
Short Circuit Current
Line Regulation
ISC
600
mA
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
△VOUT
VIN=VOUT+1V ~ 16V, IOUT=1mA
IOUT=0
30
3
1
7
IOUT=1mA
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
I
OUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, CO=10μF, f=1KHz
TJ=-20 ~ 125°C
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
TJ=-20 ~ 125°C
2
V
TJ=-20 ~ 125°C, VSHDN=VIN
TJ=-20 ~ 125°C, VSHDN=0V
B=300Hz ~ 50KHz
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IINH
eN
30
μV
CBYP=0.01μF, CO=10μF
FOR VOUT=5.0V
PARAMETER
SYMBOL
VI(OPR)
TEST CONDITIONS
MIN
TYP
5
MAX
16
UNIT
V
Operating Input Voltage
VIN=6.0V
OUT=1 ~ 150mA
RL=0
4.900
4.850
5.100
5.150
V
Output Voltage
VOUT
I
V
Short Circuit Current
Line Regulation
ISC
600
mA
mV
mV
mV
mV
mV
mV
μA
μA
μA
μA
μA
μA
dB
V
△VOUT
VIN=VOUT+1V ~ 16V, IOUT=1mA
IOUT=0
30
3
1
7
IOUT=1mA
10
Dropout Voltage
VD
IOUT=10mA
40
60
IOUT=50mA
120
280
80
150
350
100
150
330
1300
3300
IOUT=150mA
IOUT=0
IOUT=1mA
100
280
1050
2900
1.5
45
IOUT=10mA
Quiescent Current
IQ
IOUT=50mA
IOUT=150mA
OFF MODE VINH<0.18V
CBYP=0.01μF, CO=10μF, f=1KHz
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C
TJ=-20 ~ 125°C, VSHDN=VIN
TJ=-20 ~ 125°C, VSHDN=0V
B=300Hz ~ 50KHz
Supply Voltage Rejection
Control Input Logic Low
Control Input Logic High
SVR
VIL
0.15
VIH
2
V
5
0
20
-1
μA
μA
Control Input Current
Output Noise Voltage
IINH
eN
30
μV
C
BYP=0.01μF, CO=10μF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
11 of 15
QW-R102-024.M
LD2985
LINEAR INTEGRATED CIRCUIT
REVERSE CURRENT TEST CIRCUIT
APPLICATION INFORMATION
EXTERNAL CAPACITORS
Like any low-dropout regulator, the UTC LD2985 requires external capacitors for regulator stability. This
capacitor must be selected to meet the requirements of minimum capacitance and equivalent series resistance. We
suggest soldering input and outputting capacitors as close as possible to the relative pins.
INPUT CAPACITOR
An input capacitor whose value is 1μF is required with the UTC LD2985 (amount of capacitance can be
increased without limit). This capacitor must be located a distance of not more than 0.5" from the input pin of the
device and returned to a clean analog ground. Any good quality ceramic, tantalum or film capacitors can be used for
this capacitor.
OUTPUT CAPACITOR
The UTC LD2985 is designed specifically to work with ceramic output capacitors. It may also be possible to use
Tantalum capacitors, but these are not as attractive for reasons of size and cost. By the way, the output capacitor
must meet both the requirement for minimum amount of capacitance and E.S.R. (equivalent series resistance) value.
Due to the different loop gain, the stability improves for higher output versions and so the suggested minimum output
capacitor value, if low E.S.R. ceramic type is used, is 1μF for output voltages equal or major than 3.8V, 2.2μF for VO
going from 1.8 ~ 3.3V, and 3.3μF for the other versions. However, if an output capacitor lower than the suggested
one is used, it's possible to make stable the regulator adding a resistor in series to the capacitor.
IMPORTANT:
The output capacitor must maintain its ESR in the stable region over the full operating temperature to assure
stability. Also, capacitor tolerance and variation with temperature must be considered to assure the minimum amount
of capacitance is provided at all times. This capacitor should be located not more than 0.5" from the output pin of the
device and returned to a clean analog ground.
INHIBIT INPUT OPERATION
The inhibit pin can be used to turn OFF the regulator when pulled low, so drastically reducing the current
consumption down to less than 1μA. When the inhibit feature is not used, this pin must be tied to Vi to keep the
regulator output ON at all times. To assure proper operation, the signal source used to drive the inhibit pin must be
able to swing above and below the specified thresholds listed in the electrical characteristics section under VIH VIL.
Any slew rate can be used to drive the inhibit.
REVERSE CURRENT
The power transistor used in the UTC LD2985 has not an inherent diode connected between the regulator input
and output. If the output is forced above the input, no current will flow from the output to the input across the series
pass transistor. When a VREV voltage is applied on the output, the reverse current measured flows to the GND
across the two feedback resistors. This current typical value is 160μA. R1 and R2 resistors are implanted type; typical
values are, respectively, 42.6KΩ and 51.150KΩ.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
12 of 15
QW-R102-024.M
LD2985
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (TJ=25°C, CI=1μF, CO=2.2μF, CBYP=100nF)
Output Voltage vs Temperature
Quiescent Current vs Load Current
2.60
2.58
2.56
3000
2500
2000
1500
1000
VIN=3.5V
IOUT=1mA
VOUT=2.5V
CBY=10nF
2.54
2.52
2.50
2.48
2.46
2.44
2.42
500
0
2.40
-50
-25
0
25
Tc (°C)
Dropout Voltage vs Temperature
50
75
100
125
0
25
50
75
100
125 150
175
I
OUT (mA)
Quiescent Current vs Temperature
0.4
VOUT=2.5V
Cby=10nF
IOUT=150mA
VOUT=2.5V
BY=10nF
C
3.5
3.0
IOUT=150mA
0.3
2.5
2.0
1.5
1.0
0.5
0
0.2
0.1
IOUT=50mA
IOUT=10mA
IOUT=1mA
0
-50
-50
-25
0
25
50
)
75
100
125
-25
0
25
50
Tc (°C)
75
100
125
TC
(
Supply Voltage Rejection vs Temperature
fosc=1KHz
Dropout Voltage vs Output Current
VIN=3.5 ~ 6.5V
90
IOUT=10mA
250
200
150
80
70
Co=10μF
Co=1μF
60
50
100
50
0
40
30
20
VOUT=2.5V
0
25
125
Output Current, IOUT (mA)
150
175
0
50
25
Tc (°C)
75
-50
-25
75
100
125
50
100
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
13 of 15
QW-R102-024.M
LD2985
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.) (TJ=25°C, CI=1μF, CO=2.2μF, CBYP=100nF)
Supply Voltage Rejection vs Output Current
Supply Voltage Rejection vs Frequency
100
80
80
70
60
50
40
30
20
10
0
60
40
VIN=3.5 ~ 6.5V
IOUT=10mA
VOUT=2.5V
CO=1μF
20
0
VIN=3.5 ~ 6.5V
CO=10μF
fosc=1KHz
105
104
1
0
25
50
75
100
125
150
10
102
103
175
Frequency, f (KHz)
Output Current, IOUT (mA)
Line Transient
Supply Voltage Rejection vs Output Current
100
80
60
40
20
0
Tek Run:5.00MS/s
VIN
1
VOUT
1
VIN=3.5 ~ 6.5V
CO=1μF
fosc=1KHz
Ch1
500mV Ch2 20.0mV
Ch1
3.96V
M 10.0μs
2
175
0
25
50
75
100
125
150
VOUT=2.5V, IOUT=50mA, no CIN, COUT=4.7μF, tr=tf=20ns
Output Current, IOUT (mA)
Line Transient
Supply Voltage Rejection vs Frequency
70
60
Tek Run:5.00MS/s
VIN
50
40
30
20
10
0
1
VOUT
2
VIN=2.8 ~ 5.8V
IOUT=10mA
VOUT=1.8V
CO=10μF
1
105
CH2
104
10
102
103
500mV Ch2 20.0mV
Ch1
3.96V
Ch1
M 10.0μs
Frequency, f (KHz)
VOUT=2.5V, IOUT=50mA, no CIN, COUT=4.7μF, tr=tf=1μs
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
14 of 15
QW-R102-024.M
LD2985
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.) (TJ=25°C, CI=1μF, CO=2.2μF, CBYP=100nF)
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all UTC products described or contained herein.
UTC products are not designed for use in life support appliances, devices or systems where malfunction
of these products can be reasonably expected to result in personal injury. Reproduction in whole or in
part is prohibited without the prior written consent of the copyright owner. UTC reserves the right to
make changes to information published in this document, including without limitation specifications and
product descriptions, at any time and without notice. This document supersedes and replaces all
information supplied prior to the publication hereof.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
15 of 15
QW-R102-024.M
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