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ACT4303 Datasheet(PDF) 4 Page - Active-Semi, Inc

Part # ACT4303
Description  30V/3A Sensorless CC/CV Step-Down DC/DC Converter
PDF  15 Pages
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Manufacturer  ACTIVE-SEMI [Active-Semi, Inc]
Direct Link  http://www.active-semi.com
Logo ACTIVE-SEMI - Active-Semi, Inc

ACT4303 Datasheet(HTML) 4 Page - Active-Semi, Inc

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ACT4303
Rev 0, 05-Dec-11
Active-Semi
Innovative Power
TM
- 4 -
www.active-semi.com
Copyright © 2011 Active-Semi, Inc.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input Voltage
10
30
V
VIN UVLO Turn-On Voltage
Input Voltage Rising
9.0
9.4
9.7
V
VIN UVLO Hysteresis
Input Voltage Falling
1.1
V
Standby Supply Current
VEN = 3V, VFB = 1V
0.9
1.4
mA
VEN = 3V, VOUT = 5V, No load
3.0
mA
Shutdown Supply Current
VEN = 0V
75
115
µA
Feedback Voltage
792
808
824
mV
Internal Soft-Start Time
400
µs
Error Amplifier Transconductance
VFB = VCOMP = 0.8V,
∆ICOMP = ± 10µA
650
µA/V
Error Amplifier DC Gain
4000
V/V
Switching Frequency
VFB = 0.808V
200
225
250
kHz
Foldback Switching Frequency
VFB = 0V
30
kHz
Maximum Duty Cycle
85
88
91
%
Minimum On-Time
200
ns
COMP to Current Limit Transconductance
VCOMP = 1.2V
5.25
A/V
Secondary Cycle-by-Cycle Current Limit
Duty = DMAX
4.5
A
Slope Compensation
Duty = DMAX
1.2
A
ISET Voltage
1
V
ISET to IOUT DC Room Temp Current Gain
IOUT / ISET, RISET = 19.6kΩ
25000
A/A
CC Controller DC Accuracy
RISET = 19.6kΩ, VOUT = 3.5V
Open-Loop DC Test
1175
1190
1205
mA
EN Threshold Voltage
EN Pin Rising
1.47
1.6
1.73
V
EN Hysteresis
EN Pin Falling
125
mV
EN Internal Pull-up Current
4
µA
High-Side Switch ON-Resistance
0.18
Ω
SW Off Leakage Current
VEN = VSW = 0V
1
10
µA
Thermal Shutdown Temperature
Temperature Rising
150
°C
Thermal Shutdown Temperature Hysteresis Temperature Falling
20
°C
ELECTRICAL CHARACTERISTICS
(VIN = 20V, TA = 25°C, unless otherwise specified.)



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