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AT1308 Datasheet

  • AT1308

  • Preliminary Product Information Micro-Power Step up DC-DC Co...

  • 15頁

  • ETC

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AT1308
Preliminary Product Information
Micro-Power Step up DC-DC Converter
Feature
鈥perating Voltage:2.5V~6.0V
鈥igh Operating Frequency: 1MHz
鈥uilt-in N-MOS, R
ds(on)
鈮?/div>
0.3惟 (TYP)
鈥igh Output Voltage: Up to 28V
鈥hutdown Current <1碌A(chǔ)
鈥uilt-in Cycle-by-Cycle Current-limited.
鈥uilt-in Soft-Start Function.
鈥?.5% 1.23V Reference.
鈥iny SOT-25 Package
Description
The AT1308 step-up converter is designed for
small or medium size LCD panel of high bias
voltage with a constant current to provide PDAs,
and other hand-held devices. It features a fast 1.0
MHz current-mode PWM control with a built-in
0.3惟 N-MOS that allows for smaller capacitor and
inductor. Fault condition protection uses cycle-by-
cycle current limiting to sense maximum inductor
current and thermal protection. Also included
soft-start circuitry eliminates inrush current during
start-up. The AT1308 is available in 5-pin SOT-25
packages.
Application
鈥?STN/OLED Bias
鈥?Personal Digital Assistants (PDAs)
鈥?DSC
Block Diagram
VIN
LX
EN
ON/OFF
Control
Logic
VBG
1.23V
Soft-Start
Thermal
Protection
VBG
N
+
Control Logic
FB
-
Current Limit
400mA
+
-
GND
Aimtron reserves the right without notice to change this circuitry and specifications.
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW:
http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email:
service@aimtron.com.tw
1
Rev A ; 01/18/05

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