A7404
DC-DC CONVERTER/BUCK (STEP-DOWN)
AiT Semiconductor Inc.
www.ait-ic.com
42V INPUT STANDOFF VOLTAGE, 0.4A STEP-DOWN CONVERTER
ABSOLUTE MAXIMUM RATINGS
Input Voltage Range
-0.3V~42V
150°C
TJ, Max Operating Junction Temperature
SW, EN Voltage
-0.3V~VIN+0.3V
-0.3V~SW+6V
-0.3V~6V
BST Voltage
FB Voltage
SW to ground current
TO, Operating Temperature
θJC, Package Thermal Resistance
TS, Storage Temperature
Internally limited
-40°C~85°C
SOT-26
110°C/W
-55°C~150°C
Stress beyond above listed ꢀAbsolute Maximum Ratingsꢁ may lead permanent damage to the device. These are stress ratings only and
operations of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not
implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
VIN=12V, unless otherwise specified. Typical values are at TA=25°C.
Parameter
Input Standoff Voltage
Input Voltage Range
Input UVLO
Conditions
Min.
42
4
Typ.
Max.
38
Unit
V
V
Rising, Hysteresis=140mV
Rising, Hysteresis=1.3V
VFB=0.85V
3.80
38
V
Input OVP
V
Input Supply Current
Input Shutdown Current
FB Feedback Voltage
FB Input Current
0.6
mA
μA
V
6
0.780
90
0.800
0.01
750
0.820
μA
kHz
%
Switching Frequency
Maximum Duty Cycle
FoldBack Frequency
High side Switch On Resistance
High side Switch Current Limit
SW Leakage Current
EN Input Current
VFB=0V
95
550
0.7
kHz
mΩ
A
ISW=200mA
VIN=12V, VSW=0, EN=GND
VIN=12V, VEN=5V
10
5
μA
μA
V
1
EN Input Low Voltage
Thermal Shutdown
Rising, Hysteresis=100mV
Hysteresis=40°C
0.8
1.1
150
1.4
°C
REV1.0
- DEC 2015 RELEASED -
- 3 -
AITSEMI [ AiT Semiconductor ]
