AT1391
Preliminary Product Information
1-Channel Step-Down PWM Controller
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
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.
Applications
• Power Supply for portable devices
Block Diagram
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
Email:service@aimtron.com.tw
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AIMTRON [ AIMTRON TECHNOLOGY ]
