Data Sheet
ADM7171
SPECIFICATIONS
VIN = (VOUT + 0.5 V) or 2.3 V (whichever is greater), EN = VIN, ILOAD = 10 mA, CIN = COUT = 4.7 µF, TA = 25°C for typical specifications,
TJ = −40°C to +125°C for minimum/maximum specifications, unless otherwise noted.
Table 2.
Parameter
Symbol
VIN
Test Conditions/Comments
Min
Typ
Max
6.5
1
Unit
V
INPUT VOLTAGE RANGE
LOAD CURRENT
2.3
ILOAD
A
OPERATING SUPPLY CURRENT
IGND
ILOAD = 0 µA
ILOAD = 1 A
0.7
4.0
2.0
6.3
3.8
mA
mA
µA
SHUTDOWN CURRENT
IGND-SD
EN = GND, VIN = 5 V
0.25
OUTPUT VOLTAGE ACCURACY
Fixed Output Voltage Accuracy VOUT
ILOAD = 10 mA, TJ = 25°C
100 μA< ILOAD < 1A VIN = (VOUT + 0.5V) to 6.5 V
ILOAD = 10 mA
−0.5
−1.5
+1
+1.5
%
%
V
Adjustable Output Voltage
Accuracy
VSENSE
1.194 1.200 1.212
10 mA < ILOAD < 2 A, VIN = (VOUT + 0.5 V) to 6.5 V
VIN = (VOUT + 0.5 V) to 6.5 V
1.182
−0.1
1.218
V
REGULATION
Line
Load
∆VOUT/∆VIN
+0.1
0.4
%/V
%/A
nA
∆VOUT/∆ILOAD ILOAD = 100 μA to 1 A
0.1
1
SENSE INPUT BIAS CURRENT
DROPOUT VOLTAGE1
SENSEI-BIAS
VDROPOUT
100 μA< ILOAD < 1 A, VIN = (VOUT + 0.5 V) to 6.5 V
ILOAD = 500 mA, VOUT = 3 V
ILOAD = 1 A, VOUT = 3 V
42
84
6
70
135
mV
mV
OUTPUT NOISE
OUTNOISE
10 Hz to 100 kHz, all fixed output voltages
100 Hz to 100 kHz, all fixed output voltages
100 Hz, all fixed output voltages
1 kHz, all fixed output voltages
10 kHz, all fixed output voltages
µV rms
µV rms
nV/√Hz
nV/√Hz
nV/√Hz
nV/√Hz
dB
dB
dB
dB
dB
5
Noise Spectral Density
110
40
20
12
60
53
42
31
30
20
1.5
100 kHz, all fixed output voltages
POWER SUPPLY REJECTION RATIO PSRR
100 kHz, VIN = 4.0 V, VOUT = 3 V, ILOAD = 1 A, CSS = 0 nF
100 kHz, VIN = 3.5 V, VOUT = 3 V, ILOAD = 1 A, CSS = 0 nF
100 kHz, VIN = 3.3 V, VOUT = 3 V, ILOAD = 1 A, CSS = 0 nF
1 MHz, VIN = 4.0 V, VOUT = 3 V, ILOAD = 1 A, CSS = 0 nF
1 MHz, VIN = 3.5 V, VOUT = 3 V, ILOAD = 1 A, CSS = 0 nF
1 MHz, VIN = 3.3 V, VOUT = 3 V, ILOAD = 1 A, CSS = 0 nF
dB
TRANSIENT LOAD RESPONSE
tTR-REC
Time for output voltage to settle within VSETTLE
from VDEV for a 1 mA to 500 mA load step, load step
rise time = 400 ns
μs
VDEV
Output voltage deviation due to 1 mA to 500 mA load
step
Output voltage deviation after transient load response
time (tTR-REC) has passed, VOUT = 5 V, COUT = 4.7 µF
35
mV
%
VSETTLE
tSTART-UP
0.1
START-UP TIME2
VOUT = 5 V, CSS = 0 nF
VOUT = 5 V, CSS = 1 nF
VIN = 5 V
380
1.0
1
µs
ms
µA
A
SOFT START CURRENT
ISS
0.5
1.3
1.5
2.7
CURRENT-LIMIT THRESHOLD 3
VOUT PULL-DOWN RESISTANCE
THERMAL SHUTDOWN
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
UNDERVOLTAGE THRESHOLDS
Input Voltage Rising
ILIMIT
2.1
11
VOUT-PULL
EN = 0 V, VOUT = 1 V
TJ rising
kΩ
TSSD
TSSD-HYS
150
15
°C
°C
UVLORISE
UVLOFALL
UVLOHYS
2.28
V
V
mV
Input Voltage Falling
Hysteresis
1.94
200
Rev. C | Page 3 of 23