ACT8740
Rev PrB, 25-Feb-08
LOW-NOISE, LOW-DROPOUT, LINEAR REGULATORS
ELECTRICAL CHARACTERISTICS
(VINL = 3.6V, COUT4 = 1µF, TA = 25°C, unless otherwise specified.)
PARAMETER
INL Operating Voltage Range
INL UVLO Threshold
TEST CONDITIONS
MIN
3.1
TYP
MAX UNIT
5.5
3.1
V
V
V
V
INL Input Rising
INL Input Falling
2.9
3
UVLO Hysteresis
V
0.1
c
TA = 25°C
-1.2
-2.5
VNOM4
VNOM4
0
+2
+3
Output Voltage Accuracy
%
TA = -40°C to 85°C
Line Regulation Error
Load Regulation Error
VINL = Max(VOUT4 + 0.5V, 3.6V) to 5.5V
mV
I
OUT4 = 1mA to 250mA
-0.004
70
%/mA
f = 1kHz, IOUT4 = 250mA, COUT4 = 1µF
f = 10kHz, IOUT4 = 250mA, COUT4 = 1µF
Regulator Enabled
Power Supply Rejection Ratio
dB
60
40
Supply Current per Output
µA
Regulator Disabled
0
Dropout Voltaged
IOUT4 = 120mA, VOUT4 > 3.1V
100
200
250
mV
mA
mA
µs
Output Current
Current Limite
VOUT4 = 95% of regulation voltage
280
Internal Soft-Start
100
89
Power Good Flag High Threshold
Output Noise
V
OUT4, hysteresis = -4%
OUT4 = 10µF, f = 10Hz to 100kHz
%
C
40
µVRMS
µF
Stable COUT4 Range
Discharge Resistor in Shutdown
1
20
LDO Disabled, DIS4[ ] = [1]
650
ꢀ
c: VNOM4 refers to the nominal output voltage level for VOUT4 as defined by the Ordering Information section.
d: Dropout Voltage is defined as the differential voltage between input and output when the output voltage drops 100mV below the
regulation voltage at 1V differential voltage.
e: LDO current limit is defined as the output current at which the output voltage drops to 95% of the respective regulation voltage. Un-
der heavy overload conditions the output current limit folds back by 30% (typ)
Innovative Products. Active Solutions.
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