AT1799 Datasheet, PDF (4/14 Pages) Aimtron Technology – 2A Step-Down Voltage Regulator

AT1799
2A Step-Down Voltage Regulator
Electrical Characteristics
Parameter
Symbol
(IN=12V, EN=5V, Ta=+25Ċ, unless otherwise noted)
Test Condition Min. Typ. Max. Units
Input operating voltage
Input under-voltage lockout
threshold
UVLO hysteresis
IN
V_UVLO
IN Rising
4.75 12 16 V
3.8 4.2 4.6 V
- 500 - mV
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
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=+25Ċ
FB=0V
Ta=+25Ċ
V_FB=1.215V
- 3.5 - mA
- 20 50 uA
- 380 440 KHz
- 42 - KHz
1.20 1.215 1.233 V
-50 - 50 nA
2.5 2.75 - A
FB=1.0V
-
- 100 %
FB=1.5V
0
-
-%
I_SW=2A
- 100 130 mΩ
IN=13.5V,V_SW=GND
, EN=0V
-
0 A<I_SW< 2A
0.1 20 µA
0.2
%
Line Regulation
Error Amplifier Voltage Gain
Error Amplifier Trans-conductance
Soft-Start Time
4.75V < IN<16V
- 1.0 - %/V
- 70 - dB
500 800 1000 µA/V
- 10 - ms
EN Threshold Voltage
EN Pull Up Current
Thermal Shutdown
Hysteresis 150mV
EN=0V
-
1
-V
-
1
- µA
- 160 - Ċ
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: [phone] Fax: [phone]
WWW: http://www.aimtron.com.tw
8/23/2006 REV:1.1
Email: [e-mail]
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