AP1603_10 Datasheet, PDF (1/10 Pages) Diodes Incorporated – STEP-UP DC/DC CONVERTER

AP1603
STEP-UP DC/DC CONVERTER
Description
Pin Assignments
The AP1603 is a high efficiency step-up DC/DC converter for
applications using as few as a single NiMH or Li-Ion battery
cells. Only four external components are required to deliver a
fixed output voltage of 3.3V. The AP1603 starts up from less
than 0.9V input with 1mA load. Pulse Frequency Modulation
scheme brings optimized performance for applications with
light output loading and low input voltages. The output ripple
and noise are lower compared with the circuits operating in
PSM mode.
The PFM control circuit operating in 150KHz (max.) switching
rate results in smaller passive components. The space saving
SOT26 packages make the AP1603 an ideal choice of DC/DC
converter for space conscious applications, like pagers,
electronic cameras, and wireless microphones.
( Top View )
FB ¹
6 SHDN
GND ^{2 AP1603 5} OUT
REF 3
74 LX
SOT26
Features
Applications
• A Guaranteed Start-Up from less than 0.9 V
• High Efficiency
• Low Quiescent Current
• Less Number of External Components needed
• Low Ripple and Low Noise
• Space Saving Lead Free Package: SOT26
• Lead Free Finish/ RoHS Compliant (Note 1)
• Pagers
• Cameras
• Wireless Microphones
• Pocket Organizers
• Battery Backup Suppliers
• Portable Instruments
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
AP1603
Document number: DS31131 Rev. 3 - 2
1 of 10
www.diodes.com
June 2010
© Diodes Incorporated