ACT8942
Rev 2, 15-Nov-12
LOW-NOISE LDO ELECTRICAL CHARACTERISTICS
(VINL = 3.6V, COUT4 = 1.5µF, COUT5 = COUT6 = COUT7 = 3.3µF, LOWIQ[ ] = [0], TA = 25°C, unless otherwise specified.)
PARAMETER
TEST CONDITIONS
MIN
2.5
TYP
MAX
5.5
UNIT
Operating Voltage Range
V
ꢀ
V
OUT ≥ 1.2V, TA = 25°C, IOUT = 10mA
-1%
-2%
VNOM
VNOM
2%
Output Voltage Accuracy
Line Regulation
V
ꢀ
VOUT < 1.2V, TA = 25°C, IOUT = 10mA
INL = Max (VOUT + 0.5V, 3.6V) to 5.5V
4%
V
0.05
0.5
LOWIQ[ ] = [0]
mV/V
VINL = Max (VOUT + 0.5V, 3.6V) to 5.5V
LOWIQ[ ] = [1]
Load Regulation
IOUT = 1mA to IMAX2
0.08
75
65
37
31
0
V/A
dB
f = 1kHz, IOUT = 20mA, VOUT =1.2V
f = 10kHz, IOUT = 20mA, VOUT =1.2V
Regulator Enabled, LOWIQ[ ] = [0]
Regulator Enabled, LOWIQ[ ] = [1]
Regulator Disabled
Power Supply Rejection Ratio
60
52
1
Supply Current per Output
µA
Soft-Start Period
VOUT = 2.9V
VOUT Rising
VOUT Falling
140
89
3
µs
%
%
Power Good Threshold
Power Good Hysteresis
I
OUT = 20mA, f = 10Hz to 100kHz, VOUT =
Output Noise
50
µVRMS
1.2V
Discharge Resistance
REG4
LDO Disabled, DIS[ ] = 1
1.5
kꢀ
Dropout Voltageꢂ
Maximum Output Current
Current Limitꢃ
IOUT = 40mA, VOUT > 3.1V
90
140
90
180
mV
mA
mA
µF
80
100
1.5
VOUT = 95% of regulation voltage
Stable COUT4 Range
REG5
20
Dropout Voltage
Maximum Output Current
Current Limit
IOUT = 160mA, VOUT > 3.1V
280
mV
mA
mA
µF
320
400
3.3
VOUT = 95% of regulation voltage
Stable COUT5 Range
REG6
20
Dropout Voltage
Maximum Output Current
Current Limit
IOUT = 160mA, VOUT > 3.1V
180
mV
mA
mA
µF
320
400
3.3
VOUT = 95% of regulation voltage
Stable COUT6 Range
REG7
20
Dropout Voltage
Maximum Output Current
Current Limit
IOUT = 160mA, VOUT > 3.1V
140
280
mV
mA
mA
µF
320
400
3.3
VOUT = 95% of regulation voltage
Stable COUT7 Range
20
ꢀ: 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)
ꢃ: LDO current limit is defined as the output current at which the output voltage drops to 95% of the respective regulation voltage.
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