AT1314
Preliminary Product Information
High-Efficiency Step-Down
Current Regulator For LEDs
Electrical Characteristics
(IN=12V, EN=5V, Ta=+25℃, unless otherwise noted)
Parameter
Symbol
IN
Test Condition
Min. Typ. Max. Units
Input operating voltage
4.75
3.8
12
16
V
V
Input under-voltage lockout
threshold
UVLO hysteresis
VUVLO
IN Rising
4.2
4.6
-
500
-
mV
Quiescent Current
Iin
VFB=1.5V
EN =GND
Ta=+25℃
Ta=+25℃
VFB=0.4V
-
3.5
20
600
0.4
-
-
50
-
mA
uA
KHz
V
Shutdown Current
ISHDN
fSW
VFB
IFB
-
Oscillator Frequency
Feedback Regulation voltage
FB Input Bias Current
Current limit
-
0.39
0.41
50
-
-50
nA
A
-
-
1
Maximum Duty Cycle
Minimum Duty Cycle
SW Switch On-Resistance
SW Leakage Current
DMAIN
DMIIN
FB=1.0V
FB=1.5V
-
100
-
%
0
-
-
%
RSW-DS(ON) ISW=1A
100
130
mΩ
ISW
IN=13.5V,VSW=GND
-
0.1
0.2
20
µA
, EN=0V
Load Regulation
0 A<ISW< 1A
%
Line Regulation
4.75V < IN<16V
-
-
1.0
70
-
-
%/V
dB
Error Amplifier Voltage Gain
Error Amplifier Trans-conductance
Soft-Start Time
500
-
800 1000
µA/V
ms
0.8
-
EN Threshold Voltage
EN Pull Up Current
Hysteresis 150mV
EN=0V
-
-
1
1
-
-
-
V
µA
V
VIH
VIL
2.0
-
-
EN Trip Level
-
0.5
V
Thermal Shutdown
-
160
-
℃
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
1/17/2006 REV:1.0
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
4
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
