A7596
DC-DC CONVERTER/ BUCK (STEP-DOWN)
150KHz, 3A PWM BUCK DC-DC CONVERTER
AiT Semiconductor Inc.
www.ait-ic.com
ELECTRICAL CHARACTERISTICS
These specifications apply VIN = 12V for 5.0V options, and VIN = 24V for Adj option, and the operating ambient
temperatures TA = 25°C, Unless otherwise specified
Parameter
Symbol
Conditions
4.5V≦VIN≦40V
Min.
Typ.
Max.
Unit
ADJ 1.193 1.230 1.267
5.0 4.850 5.000 5.150
0.2A≦IOUT≦2A,VOUT=3V
7V≦VIN≦40V
Output VoltageNOTE1
VOUT
V
0.2A≦IOUT≦3A
VIN=12V, ILOAD=3A, VOUT=3V ADJ
90
80
Efficiency
ꢃ
%
VIN=12V, ILOAD=3A
VFB=1.3V
5.0
Feeback Bias Current
IB
10
50
nA
(Adjustable Version Only)
IOUT=3ANOTE1,2
NOTE2
Saturation Voltage
Duty Cycle (ON)
Duty Cycle (OFF)
Oscillator Frequency
Output Leakage
Current
VSAT
DC
DC
fO
1.16
100
0
1.4
V
%
%
NOTE3
127
150
173
100
KHz
μA
mA
mA
μA
NOTE4
Output=0VNOTE1, 3
Output=-0.9VNOTE5
NOTE3
IL
2
5
Quiescent Current
Standby Current
IQ
ISTBY
VIH
VIL
IH
/EN Pin=5V
Low (ON)
100
1.3
1.4
5
200
0.6
V
High (OFF)
2.0
/EN Pin Input Level
VLEVEL= 2.5V (OFF)
VLEVEL= 0.5V (ON)
15
5
μA
IL
0.02
NOTE1: No diode, inductor or capacitor connected to output pin.
NOTE2: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
NOTE3: Feedback pin removed from output and connected to 5V and the ADJ version
NOTE4: The switching frequency is reduced when the second stage current limit is activated.
NOTE5: VIN = 40V.
REV1.2
- MAY 2009 RELEASED, MAR 2015 UPDATE -
- 4 -
AITSEMI [ AiT Semiconductor ]
