ACT4501
Rev 2, 14-Nov-12
ELECTRICAL CHARACTERISTICS
(V
IN
= 14V, T
A
= 25°C, unless otherwise specified.)
PARAMETER
Input Voltage
V
IN
UVLO Turn-On Voltage
V
IN
UVLO Hysteresis
Standby Supply Current
Shutdown Supply Current
Feedback Voltage
Internal Soft-Start Time
Error Amplifier Transconductance
Error Amplifier DC Gain
Switching Frequency
Foldback Switching Frequency
Maximum Duty Cycle
Minimum On-Time
TEST CONDITIONS
Input Voltage Rising
Input Voltage Falling
V
EN
= 3V, V
FB
= 1V
V
EN
= 3V, V
O
= 5V, No load
V
EN
= 0V
MIN
10
9.05
TYP
9.35
1.1
1.0
2.5
75
MAX
30
9.65
UNIT
V
V
V
mA
mA
100
824
µA
mV
µs
µA/V
V/V
792
808
800
V
FB
= V
COMP
= 0.8V,
∆I
COMP
= ± 10µA
650
4000
V
FB
= 0.808V
V
FB
= 0V
115
10
85
125
16
88
800
1.75
1.8
0.75
1
130
38
93
kHz
kHz
%
ns
A/V
A
A
V
A/A
COMP to Current Limit Transconductance V
COMP
= 1.2V
Switch Current Limit
Slope Compensation
ISET Voltage
ISET to IOUT DC Room Temp Current
Gain
CC Controller DC Accuracy
EN Threshold Voltage
EN Hysteresis
EN Internal Pull-up Current
High-Side Switch ON-Resistance
SW Off Leakage Current
Thermal Shutdown Temperature
V
EN
= V
SW
= 0V
Temperature Rising
IOUT / ISET
R
ISET
= 19.6kΩ, V
IN
= 10V - 30V
EN Pin Rising
EN Pin Falling
1020
0.75
Duty = 50%
Duty = D
MAX
25000
1200
0.8
80
4
0.3
1
155
10
1380
0.85
mA
V
mV
µA
Ω
µA
°C
Innovative Power
TM
-4-
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ACTIVE-SEMI [ ACTIVE-SEMI, INC ]
