AT1792
Preliminary Product Information
2A/18V/300KHz Step-Down Voltage Regulator
Electrical Characteristics
(IN=12V, EN=5V, Ta=+25℃, unless otherwise noted)
Parameter
Input operating voltage
Input under-voltage lockout
threshold
UVLO hysteresis
Quiescent Current
Shutdown Current
Oscillator Frequency
Short-Circuit Frequency
Feedback Regulation voltage
FB Input Bias Current
Current limit
Maximum Duty Cycle
Minimum Duty Cycle
SW Switch On-Resistance
SW Leakage Current
Load Regulation
Line Regulation
Error Amplifier Trans-conductance
Soft-Start Time
EN Threshold Voltage
EN Pull Up Current
Symbol
IN
V
UVLO
Test Condition
IN Rising
Min.
4.75
3.8
-
Typ.
12
4.2
700
3.5
25
300
32
Max. Units
18
4.6
-
-
50
330
-
V
V
mV
mA
uA
KHz
KHz
V
nA
A
%
%
mΩ
µA
%
-
400
-
-
-
%/V
µA/V
ms
V
µA
Iin
I
SHDN
f
SW
V
FB
I
FB
D
MAIN
D
MIIN
R
SW-DS(ON)
I
SW
V
FB
=1.5V
EN =GND
Ta=+25℃
FB=0V
Ta=+25℃
V
FB
=1.225V
Min. On-time>0.5µs
FB=1.0V
FB=1.5V
I
SW
=2A
IN=13.5V,V
SW
=GND
, EN=0V
0 A<I
SW
< 1.5A
4.75V < IN<18V
-
-
-
-
1.206 1.225 1.244
-50
2.5
-
0
-
-
-
-
-
-
100
0.1
0.2
-
200
-
1.0
300
10
1.5
--
50
-
100
-
-
20
Hysteresis 150mV
EN=0V
-
2
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW:
http://www.aimtron.com.tw
11/21/2007 REV:0.5
Email:
service@aimtron.com.tw
4
AIMTRON [ AIMTRON TECHNOLOGY ]
