AT1361 Datasheet, PDF (4/15 Pages) Aimtron Technology – 1MHz,1A Synchronous Buck Converter

AT1361
1MHz,1A Synchronous Buck Converter
Electrical Characteristics
Parameter
Symbol
(VIN =5V, T_A=+25°C , unless otherwise noted. )
Condition
Values
Unit
Min. Typ. Max.
Input Supply Range
Input Under-Voltage
Lock Out threshold
UVLO hysteresis
V_IN
V_UVLO
IN Rising
2.5 -- 5.5 V
-- 2.3 -- V
-- 0.1 -- V
Quiescent Current^*
FB=0.6V,I_LOAD=0A
I_{S Active Mode}
--
70 100 µA
RUN=0V, VIN=5.5V
Current in standby mode I_ST
-- 0.5 1 µA
Feedback Voltage
V_FB
0.588 0.600 0.612 V
Feedback Voltage
line-regulation
Feedback Variation
with Temperature
V_IN =2.5V to 5.5V
V_FB-Line
T_A=-20°C to +85°C
-- 0.1 0.5 %/V
-- 0.5 1.0 %
Feedback current
I_FB
--
Peak Inductor Current*
I_PK ^{VIN=5V,VOUT=3.3V}
1.2
Maximum Output
Current*
VIN=5V±5%, VOUT=3.3V,
I_{O L=4.7µH, TA=25°C}
1
fosc1 ^FB=0.6V
0.8
Oscillator Frequency
fosc2 ^FB=0V
--
RDS(ON) _{of P-Channel}
MOSFET
R_PFET
ISW=600mA
--
RDS(ON) _{of N-Channel}
MOSFET
R_NFET
ISW=-600mA
--
SW Leakage Current
I_LSW ^{RUN=0V,SW=0V or 5V,VIN=5V} --
RUN High-Level Input
Voltage
V_RUNÅ_H
V_IN =2.5V to 5.5V
1.5
RUN Low-Level Input
Voltage
V_RUNÅ_L
V_IN =2.5V to 5.5V
--
RUN leakage Current
I_RUN
--
-- ±200 nA
1.8 -- A
--
-- A
1.0 1.2 _MHz
200 -- _KHz
0.4 0.5 Ω
0.35 0.45 Ω
±0.1 ±1 µA
--
-- V
-- 0.3 V
±0.1 ±1 µA
* I _PK
= I_O
+
∆I
2
=
I_O
+ ^(VIN
−V_OUT ) × t_ON
2× L
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: [phone] Fax: [phone]
WWW: http://www.aimtron.com.tw
1/11/2008 REV:1.0
Email:[e-mail]
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