at1799 Aimtron Technology, at1799 Datasheet - Page 4

• Manufacturer Part Number: at1799
• Description: 2a Step-down Voltage Regulator
• Manufacturer: Aimtron Technology

Electrical Characteristics
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 Voltage Gain
Error Amplifier Trans-conductance
Soft-Start Time
EN Threshold Voltage
EN Pull Up Current
Thermal Shutdown
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: [phone]
8/23/2006 REV:1.1
Parameter
Fax: [phone]
IN
V
Iin
I
f
V
I
D
D
R
I
SHDN
SW
FB
SW
SW-DS(ON)
UVLO
FB
MAIN
MIIN
Symbol
IN Rising
V
EN =GND
Ta=+25℃
FB=0V
Ta=+25℃
V
FB=1.0V
FB=1.5V
I
IN=13.5V,V
, EN=0V
0 A<I
4.75V < IN<16V
Hysteresis 150mV
EN=0V
SW
4
(IN=12V, EN=5V, Ta=+25℃, unless otherwise noted)
FB
FB
Test Condition
=2A
=1.5V
=1.215V
SW
2A Step-Down Voltage Regulator
< 2A
SW
=GND
WWW:
Email:
Min.
4.75
1.20
500
-50
3.8
2.5
0
http://www.aimtron.com.tw
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[e-mail]
1.215 1.233
Typ.
2.75
500
380
100
800
160
4.2
3.5
0.1
0.2
1.0
12
20
42
70
10
1
1
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AT1799
Max. Units
1000 µA/V
440
100
130
4.6
16
50
50
20
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KHz
KHz
%/V
mV
mA
mΩ
uA
nA
µA
µA
dB
ms
℃
%
%
%
V
V
V
A
V