AP1522
AP1522 is Step-Up DC/DC Converter manufactured by Anachip.
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 ponents. A low 1.25V feedback voltage minimizes power loss in the current setting resistor for better efficiency.
- Applications
- Cellular Phones
- PDAs, Handhelp puters
- 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
SOT23-5L
- 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 acpany the sale of the product.
Rev. 1.0 May. 5, 2005 1/8
Step-Up DC/DC Converter
- Block Diagram
1 SW Driver R S Q Q1 parator
A2
+
FB 3 VIN 5 VREF 1.25V
A1
+
Σ
RAMP Generator
SHDN 4 Shutdown 1MHz Oscillator 2 GND
- Absolute Maximum Ratings
Symbol VIN VSW VFB VSHDN TJ TLEAD TOPR VIN Pin Voltage SW Voltage Feedback Pin Voltage SHDN Pin Voltage Maximum Junction Temperature Power Dissipation Operating Temperature Range Parameter Rating 10 36 10 10 125 300 -40 to +85 Unit V V V V o o o...
