A7142
DC-DC CONVERTER/ BUCK (STEP-DOWN)
AiT Semiconductor Inc.
www.ait-ic.com
SIMPLE SWITCHER POWER CONVERTER 150kHz, 2A PWM
ELECTRICAL CHARACTERISTICSNOTE1
VIN= 12V Unless otherwise specified
Parameter
Symbol
Conditions
Min.
Typ.
5.0
Max.
Unit
V
System Parameters (Test Circuit Figure 1)
7V ≤ VIN ≤ 40V,
4.800
4.750
5.200
5.250
(NOTE7) 5.0V
0.2A ≤ ILOAD ≤ 2A
VOUT
7V ≤ VIN ≤ 40V,
0.2A ≤ ILOAD ≤ 2A
VOUT programmed for 5V
VIN =12V, ILOAD =2A
VIN =12V, ILOAD =2A
VOUT programmed for 5V
1.193
1.180
1.267
1.280
(NOTE7) ADJ
1.230
V
Output Voltage
5.0V
ADJ
77
77
%
%
η
All Output Voltage Versions
Feedback Bias
Current
VOUT =5V (Adjustable
Version Only)
100
500
170
180
1.4
IFB
(NOTE7)
(NOTE7)
(NOTE7)
50
nA
130
120
Oscillator Frequency
FO
(NOTE6)
150
kHz
Saturation Voltage
Max Duty Cycle (ON)
Current Limit
VSAT
DC
ICL
IOUT =2A (NOTE2)
(NOTE3)
1.2
98
V
%
A
1.6
93
2.5
2.3
4.6
5.2
Peak Current (NOTE2, 6) (NOTE7)
3.2
(NOTE4, 5):
Output = 0V
Output = -0.8V
(NOTE 4)
ON/OFF Pin = 5V
(OFF)
Output Leakage
Current
IOL
0.4
10
5
2
30
10
mA
Quiescent Current
Standby Quiescent
Current
IQ
mA
uA
ISTBY
60
200
ON/OFF Control
2.2
2.4
VIH
VIL
VOUT=0V
(NOTE7)
(NOTE7)
1.4
1.2
V
V
ON/OFF Pin Logic
Input Level
VOUT=Nominal Output
Voltage
ON/OFF Pin = 5V (OFF)
ON/OFF Pin = 0V (ON)
1.0
0.8
30
IIH
IIL
12
0
uA
uA
ON/OFF Pin Input
Current
10
NOTE1: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance.
NOTE2: Output pin sourcing current. No diode, inductor or capacitor connected to output.
NOTE3: Feedback pin removed from output and connected to 0V.
NOTE4: Feedback pin removed from output and connected to +12V for the adjustable and 5V, versions to force the output transistor OFF
NOTE5: VIN =40V.
NOTE6: The oscillator frequency reduces to approximately 36 kHz in the event of an output short or an overload which causes the
regulated output voltage to drop approximately 40% from the nominal output voltage. This self protections feature lowers the
average power dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%.
NOTE7: denotes the specifications which apply over full operating temperature range TJ = -40…+125°C.
REV2.1
- JUN 2011 RELEASED, MAY 2016 UPDATED -
- 4 -
AITSEMI [ AiT Semiconductor ]
