A7431
DC-DC CONVERTER BUCK (STEP-DOWN)
42V 3A CC/CV
AiT Semiconductor Inc.
www.ait-ic.com
ELECTRICAL CHARACTERISTICS
VIN = 20V, TA = +25℃, unless otherwise noted.
Parameter
Conditions
Min.
10
Typ.
Max.
36
Unit
V
Input Voltage
Input Voltage Surge
VIN UVLO Turn-On Voltage
VIN UVLO Hysteresis
Standby Supply Current
Feedback Voltage
42
V
Input Voltage Rising
Input Voltage Falling
VFB = 1V
6.7
0.1
2.5
808
3
V
V
mA
mV
ms
792
824
Internal Soft-Start Time
V
FB = VCOMP = 0.8V,
Error Amplifier Transconductance
500
μA/V
ΔICOMP = ± 10μA
Error Amplifier DC Gain
4000
125
50
V/V
kHz
kHz
%
Switching Frequency
VFB = 0.808V
VFB = 0V
Foldback Switching Frequency
Maximum Duty Cycle
98
Minimum On-Time
200
4
ns
COMP to Current Limit Transconductance
Secondary Cycle-by-Cycle Current Limit
Slope Compensation
VCOMP = 1.2V
Vout=3.5V
A/V
A
4.5
1.2
1
Duty = DMAX
A
ISET Voltage
V
ISET to IOUT DC Room Temp Current Gain
IOUT / ISET, RISET = 11.5kΩ
RISET = 22kΩ,
27500
A/A
CC Controller DC Accuracy
VIN = 14V, VOUT = 3.5V
Open-Loop DC Test
OVP Pin Rising
1250
mA
OVP pin Voltage
0.8
0.57
0.12
1.0
V
V
OVP pin Voltage
OVP Pin Voltage Falling
High-Side Switch ON-Resistance
SW Off Leakage Current
Thermal Shutdown Temperature
Ω
VIN = VSW = 0V
10
μA
°C
°C
Temperature Rising
160
40
Thermal Shutdown Temperature Hysteresis Temperature Falling
REV1.1
- JAN 2016 RELEASED, SEP 2016 UPDATED -
- 4 -
AITSEMI [ AiT Semiconductor ]
