AT1391
Preliminary Product Information
1-Channel Step-Down PWM Controller
Electrical Characteristics
(VCC = 5V,Ta =+25℃ , unless otherwise noted. )
Parameter
Input Supply Range
Quiescent Current
Current in standby mode
Entire device
Reference Voltage
Reference Voltage
line-regulation
Rference Variation
with Temperature
Input Offset Voltage
Source Current
Sink Current
Source current Variation
with temperature
Sink current Variation
with temperature
Unity Gain Bandwidth
Common Mode Input
Voltage Range
DC Open Loop Gain
Frequency
High Level Voltage
Sawtooth wave
oscillator (OSC)
Low Level Voltage
Variation with Power
Supply
Variation with
temperature
Charge Current of
SS
Invalid threshold
voltage of SS
Charge Current of
SS
Threshold Voltage of
SCP
Output source current
Symbol
V
CC
I
CC
I
ST
V
REF
V
REF-Line
Condition
2.5
Duty=50%,
fOSC=600KHz
PDRV/NDRV No Load
CTL=0V
Ta =-20℃ to +85℃
VCC=2.5V to 6.0V
Ta =-20℃ to +85℃
Values
Min. Typ. Max.
--
1.0
6.0
1.5
10
1.20 1.22 1.24
1
0.5
-1.0
160
-1.5
120
5
1.5
10
-2.0
80
20
20
10.0
0.2
500
110
600
1.0
0.5
1.5
Unit
V
mA
µA
V
mV
%
mV
mA
μA
%
%
MHz
V
dB
700 KHz
V
V
2
7
%
%
µA
V
µA
V
mA
V
IO
I
OH
I
OL
V
COMP
= V
REF
–0.5V
V
COMP
= 0.5V
Ta =-20℃ to +85℃
Ta =-20℃ to +85℃
Error amplifier
f
T
V
COM
A
V
fosc
Vcc=2.5V to 6V
Ta =-20℃ to +85℃
I
CSS
-1.0
1.0
I
CSCP
Soft-Start
-1.5 -1.25 -1.0
0.8
0.9
-130
1.0
-80
Short-Circuit
I
source
Duty≥95% OUT=0V
-
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW:
http://www.aimtron.com.tw
3/15/2006 REV:1.1
Email:service@aimtron.com.tw
4
AIMTRON [ AIMTRON TECHNOLOGY ]
