AT1796
Preliminary Product Information
150kHz, 3A Step-Down Switching Regulator
Electrical characteristics
(VCC = 12V , T =+25℃ , unless otherwise noted. )
a
Values
Unit
Parameter
Symbol
Condition
Min. Typ. Max.
Quiescent Current
IOC
--
5
10
mA
Stand-by
quiescent Current
ISQC
SHDN = 5V
--
80
200
µA
VIL
VIH
IIL
Active mode
Standby mode
Active mode
Standby mode
--
2.0
--
--
--
0.6
--
V
V
SHDN pin logic input
voltage threshold
0.02
5
5
SHDN pin logic input
current
µA
µA
IIH
--
15
<AT1796-3.3V>
4.75≦Vcc≦28V
0.2A≦ILOAD≦3A
Output voltage
VOUT
3.168
73
3.3
--
3.432
--
V
Efficiency
η
Vin = 12V , ILOAD = 3A
%
<AT1796-5.0V>
4.75≦Vcc≦28V
0.2A≦ILOAD≦3A
Output voltage
VOUT
4.8
--
5.0
80
5.2
--
V
Efficiency
η
Vin = 12V , ILOAD = 3A
%
<AT1796-ADJ>
4.75≦Vcc≦28V
0.2A≦ILOAD≦3A
Vin = 12V , ILOAD = 3A ,
FB voltage
Efficiency
VFB
1.193 1.230 1.267
V
η
--
73
--
%
VOUT = 3V
<Device parameters>
Saturation voltage
Oscillator frequency
Maximum duty cycle
Minimum duty cycle
Current limit
VSAT ILOAD = 3A
FOSC
--
127
--
1.15
150
100
0
1.5
173
--
V
kHz
%
DMAX FB = 0V
DMIN FB = 3.3V or 5V
--
--
%
ICL
IL1
IL2
Peak current
3.6
4.5
5.0
A
No diode . capacitor , inductor
FB = 12V ,
Switching OFF , OUT = 0V
--
--
50
2
--
µA
Output leakage current
Vcc =28V
30
mA
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
2/15/2006 REV : 1.1
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
4
AIMTRON [ AIMTRON TECHNOLOGY ]
