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AP1522
Step-Up DC/DC Converter Features
- High Efficiency: 84% Typical - 36V High Output Voltage ...
www.DataSheet4U.com
AP1522
Step-Up DC/DC Converter Features
- High Efficiency: 84% Typical - 36V High Output
Voltage - Fast 1MHz Switching Frequency - Low Profile SOT23-5 Pb-Free Packaging
General Description
The AP1522 is a step-up DC/DC converter in a 5-Lead low profile SOT23-5 package. The AP1522 switches at 1MHz that allows the use of tiny external components. A low 1.25V feedback
voltage minimizes power loss in the current setting resistor for better efficiency.
Applications
- Cellular Phones - PDAs, Handhelp Computers - Digital Cameras - LCD Bias
Voltage, Battery Backup -
Pin Assignments
Top View VIN SHDN
Pin Descriptions
Name SW VSS FB SHDN Description Switch Pin. Connect inductor/diode here. Minimize trace area at this pin to reduce EMI. GND pin Feedback Pin. Reference
voltage is 1.25V. Shutdown Pin. Tie to 0.6V or higher to enable device ； 0.5Vor less to disable device. Input Supply Pin. Must be locally bypassed.
SW VSS
FB
SOT23-5L
VIN
Ordering Information
AP1522 Package W: SOT23-5L X X Packing Blank : Tube A : Taping
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
Rev. 1.0 May. 5, 2005 1/8
AP1522
Step-Up DC/DC Converter Block Diagram
1 SW Driver R S Q Q1
Comparator
A2
+
FB 3 VIN 5 VREF 1.25V
A1
RC
+
CC
Σ
RAMP Generator
S...
