ACT8847
Rev 5, 15-Nov-12
LOW-INPUT VOLTAGE LDO ELECTRICAL CHARACTERISTICS
(VINL3 = 3.6V, COUT10 = COUT11 = COUT12 = 2.2µF, TA = 25°C, unless otherwise specified.)
PARAMETER
TEST CONDITIONS
MIN
1.7
-1
TYP
MAX
5.5
1
UNIT
V
Operating Voltage Range
c
VOUT ≥ 1.0V, IOUT = 10mA
OUT < 1.0V, IOUT = 10mA
VINL = Max (VOUT + 0.5V, 3.6V) to 5.5V
OUT = 1mA to IMAX2
VNOM
%
Output Voltage Accuracy
V
-10
10
mV
Line Regulation
Load Regulation
0.5
0.1
50
40
22
0
mV
V/A
I
f = 1kHz, IOUT = 20mA, VOUT = 1.2V
f = 10kHz, IOUT = 20mA, VOUT = 1.2V
Regulator Enabled
Power Supply Rejection Ratio
Supply Current per Output
dB
µA
Regulator Disabled
2
Soft-Start Period
VOUT = 3.0V
VOUT Rising
VOUT Falling
100
92
3.5
µs
%
%
Power Good Threshold
Power Good Hysteresis
I
OUT = 20mA, f = 10Hz to 100kHz, VOUT =
Output Noise
30
µVRMS
1.2V
Discharge Resistance
LDO rated at 150mA (REG10)
Dropout Voltagee
LDO Disabled, DIS[ ] = 1
1.5
kꢀ
IOUT = 80mA, VOUT > 3.1V
100
200
200
mV
mA
mA
µF
Maximum Output Current
Current Limitf
150
180
VOUT = 95% of regulation voltage
Recommend Output Capacitor
2.2
LDO rated at 350mA (REG11 & REG12)
Dropout Voltagee
IOUT = 160mA, VOUT > 3.1V
100
mV
mA
mA
µF
Maximum Output Current
Current Limitf
350
400
VOUT = 95% of regulation voltage
Recommend Output Capacitor
2.2
c: VNOM refers to the nominal output voltage level for VOUT as defined by the Ordering Information section.
2: IMAX Maximum Output Current.
3: Dropout Voltage is defined as the differential voltage between input and output when the output voltage drops 100mV below the
regulation voltage (for 3.1V output voltage or higher).
f: LDO current limit is defined as the output current at which the output voltage drops to 95% of the respective regulation voltage.
Under heavy overload conditions the output current limit folds back by 50% (typ)
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