ACT8740
Rev PrB, 25-Feb-08
STEP-DOWN DC/DC CONVERTER
ELECTRICAL CHARACTERISTICS
(VVP1 = 3.6V, TA = 25°C, unless otherwise specified.)
PARAMETER
VP1 Operating Voltage Range
VP1 UVLO Threshold
TEST CONDITIONS
MIN
3.1
TYP
MAX
5.5
UNIT
V
Input Voltage Rising
Input Voltage Falling
2.9
3
3.1
V
VP1 UVLO Hysteresis
80
mV
µA
µA
Standby Supply Current
Shutdown Supply Current
130
0.1
200
1
ON1 = GA, VVP1 = 4.2V
c
V
V
V
NOM1 < 1.3V, IOUT1 = 10mA
-2.4%
-1.2%
VNOM1
VNOM1
0.15
0.0017
0.6
+1.8%
+1.8%
Output Voltage Regulation Accuracy
V
NOM1 ≥ 1.3V, IOUT1 = 10mA
Line Regulation
Load Regulation
Current Limit
VP1 = Max(VNOM1 + 1V, 3.2V) to 5.5V
%/V
%/mA
A
IOUT1 = 10mA to 350mA
0.45
1.35
VOUT1 ≥ 20% of VNOM1
1.6
1.85
MHz
kHz
Ω
Oscillator Frequency
V
OUT1 = 0V
530
PMOS On-Resistance
NMOS On-Resistance
SW1 Leakage Current
Power Good Threshold
Minimum On-Time
I
SW1 = -100mA
ISW1 = 100mA
VP1 = 5.5V, VSW1 = 5.5V or 0V
0.45
0.3
0.75
0.5
1
Ω
V
µA
94
70
%VNOM1
ns
c: VNOM1 refers to the nominal output voltage level for VOUT1 as defined by the Ordering Information section.
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