AT1361
1MHz,1A Synchronous Buck Converter
Electrical Characteristics
(VIN =5V, TA=+25°C , unless otherwise noted. )
Parameter
Symbol
Condition
Values
Unit
Min. Typ. Max.
Input Supply Range
VIN
2.5
--
--
5.5
--
V
V
V
Input Under-Voltage
Lock Out threshold
UVLO hysteresis
IN Rising
VUVLO
2.3
0.1
--
--
FB=0.6V,ILOAD=0A
Active Mode
Quiescent Current*
Current in standby mode
Feedback Voltage
IS
IST
--
--
70
100
1
µA
µA
V
RUN=0V, VIN=5.5V
0.5
VFB
0.588 0.600 0.612
VIN =2.5V to 5.5V
Feedback Voltage
line-regulation
VFB-Line
--
--
0.1
0.5
0.5
1.0
%/V
%
TA=-20°C to +85°C
Feedback Variation
with Temperature
Feedback current
IFB
IPK
--
--
nA
A
±200
VIN=5V,VOUT=3.3V
Peak Inductor Current*
1.2
1.8
--
VIN=5V±5%, VOUT=3.3V,
Maximum Output
Current*
IO
1
--
--
A
L=4.7µH, T
°C
A=25
FB=0.6V
0.8
--
1.0
1.2
--
fosc1
fosc2
MHz
KHz
Oscillator Frequency
FB=0V
200
R
I
=600mA
DS(ON) of P-Channel
MOSFET
SW
SW
RPFET
--
0.4
0.5
Ω
R
I
=-600mA
DS(ON) of N-Channel
RNFET
ILSW
--
--
0.35
0.45
Ω
µA
V
MOSFET
RUN=0V,SW=0V or 5V,VIN=5V
VIN =2.5V to 5.5V
SW Leakage Current
±0.1
±1
RUN High-Level Input
Voltage
VRUN＿
1.5
--
--
H
RUN Low-Level Input
Voltage
VIN =2.5V to 5.5V
VRUN＿
--
--
--
0.3
V
L
RUN leakage Current
IRUN
±0.1
±1
µA
(VIN −VOUT )×tON
2× L
∆I
2
*IPK = IO
+
= IO +
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
1/11/2008 REV:1.0
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email:service@aimtron.com.tw
4
AIMTRON [ AIMTRON TECHNOLOGY ]
