ACT4523
Active- Semi
Rev 4, 21-Jul-11
ELECTRICAL CHARACTERISTICS
(VIN = 20V, TA = 25°C, unless otherwise specified.)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
Input Voltage
Input Voltage Surge
10
38
40
V
V
V
IN UVLO Turn-On Voltage
IN UVLO Hysteresis
Input Voltage Rising
Input Voltage Falling
9.0
9.4
1.1
0.9
3.0
75
9.7
V
V
V
VEN = 3V, VFB = 1V
1.4
mA
mA
µA
mV
µs
Standby Supply Current
VEN = 3V, VOUT = 5V, No load
Shutdown Supply Current
Feedback Voltage
VEN = 0V
115
824
792
808
400
Internal Soft-Start Time
V
FB = VCOMP = 0.8V,
Error Amplifier Transconductance
650
µA/V
∆ICOMP = ± 10µA
Error Amplifier DC Gain
Switching Frequency
4000
225
30
V/V
kHz
kHz
%
V
V
FB = 0.808V
FB = 0V
200
85
250
91
Foldback Switching Frequency
Maximum Duty Cycle
88
Minimum On-Time
200
5.25
4.5
1.2
1
ns
COMP to Current Limit Transconductance
Secondary Cycle-by-Cycle Current Limit
Slope Compensation
V
COMP = 1.2V
A/V
A
Duty = DMAX
Duty = DMAX
A
ISET Voltage
V
ISET to IOUT DC Room Temp Current Gain IOUT / ISET, RISET = 19.6kꢀ
25000
1190
A/A
mA
RISET = 19.6kꢀ, VOUT = 3.5V
CC Controller DC Accuracy
1175
1.47
1205
1.73
Open-Loop DC Test
EN Threshold Voltage
EN Pin Rising
EN Pin Falling
1.6
125
4
V
mV
µA
ꢀ
EN Hysteresis
EN Internal Pull-up Current
High-Side Switch ON-Resistance
SW Off Leakage Current
Thermal Shutdown Temperature
0.16
1
V
EN = VSW = 0V
10
µA
°C
Temperature Rising
150
Thermal Shutdown Temperature Hysteresis Temperature Falling
20
°C
Innovative PowerTM
- 4 -
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