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AT1391 데이터시트 PDF




Aimtron Technology에서 제조한 전자 부품 AT1391은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 AT1391 자료 제공

부품번호 AT1391 기능
기능 1-Channel Step-Down PWM Controller
제조업체 Aimtron Technology
로고 Aimtron Technology 로고


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AT1391 데이터시트, 핀배열, 회로
www.DataSheet4U.com
Features
• High efficiency
• Using external P channel MOSFET
• Maximum Duty 100%
• Oscillation frequency 600KHz
• Soft Start by an external capacity
• Output voltage accuracy ±2%
• Built-in ON/OFF Function
• Built-in Short-circuit Protection
• Stand-by current max. 10µA
• Quiescent Current 1mA
• Input voltage: 2.5V ~7.0V
Applications
• Power Supply for portable devices
Block Diagram
AT1391
Preliminary Product Information
1-Channel Step-Down PWM Controller
General Description
The AT1391 provides complete control and
protection for a DC/DC converter optimized for
high-performance microprocessor applications. It
is designed to drive one P-Channel in a buck
topology. The AT1391 integrates all of the control,
output adjustment, and protection functions into a
single package. The output voltage of the converter
can be precisely regulated with a maximum
tolerance of ±2% over temperature and line voltage
variations. The AT1391 is a family of low-noise
step-down DC/DC converters that is ideally suited
for systems powered from a 1-cell Li-ion battery or
from a 3-cell to 4-cell NiCd, NiMH, or alkaline
battery. It can also be used to USB-Based power
system.
Aimtron reserves the right without notice to change this circuitry and specifications.
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
1




AT1391 pdf, 반도체, 판매, 대치품
AT1391
Preliminary Product Information
1-Channel Step-Down PWM Controller
Electrical Characteristics
Parameter
Symbol
(VCC = 5V,Ta =+25, unless otherwise noted. )
Condition
Values
Unit
Min. Typ. Max.
Entire device
Input Supply Range
VCC
2.5 -- 6.0 V
Duty=50%,
Quiescent Current
ICC fOSC=600KHz
PDRV/NDRV No Load
CTL=0V
Current in standby mode IST
1.0 1.5 mA
10 µA
Reference Voltage
VREF Ta =-20to +851.20 1.22 1.24 V
Error amplifier
Sawtooth wave
oscillator (OSC)
Soft-Start
Short-Circuit
Reference Voltage
line-regulation
VCC=2.5V to 6.0V
VREF-Line
Rference Variation
with Temperature
Ta =-20to +85
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
VIO
IOH
IOL
fT
VCOM
AV
fosc
VCOMP = VREF –0.5V
VCOMP = 0.5V
Ta =-20to +85
Ta =-20to +85
High Level Voltage
Low Level Voltage
Variation with
Supply
Variation with
temperature
Power
Charge Current of
SS
Invalid threshold
voltage of SS
Charge Current of
SS
Threshold Voltage of
SCP
Output source current
ICSS
ICSCP
Isource
Vcc=2.5V to 6V
Ta =-20to +85
Duty95% OUT=0V
1 5 mV
0.5 1.5 %
10 mV
-1.0 -1.5 -2.0 mA
160 120 80 μA
20 %
20 %
10.0 MHz
0.2 1.5 V
110 dB
500 600 700 KHz
1.0 V
0.5 V
2%
7%
-1.0 µA
1.0 V
-1.5 -1.25 -1.0 µA
0.8 0.9 1.0 V
- -130 -80 mA
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
4

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AT1391 전자부품, 판매, 대치품
AT1391
Preliminary Product Information
1-Channel Step-Down PWM Controller
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
7

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