AP3410B Datasheet, PDF (1/12 Pages) BCD Semiconductor Manufacturing Limited – 1.5MHz Synchronous Step-down DC-DC Converter

Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter
AP3410B
General Description
The AP3410B is a high efficiency step-down DC-DC
voltage converter. The chip operation is optimized by
peak-current mode architecture with built-in
synchronous power MOSFET switchers. The
oscillator and timing capacitors are all built-in
providing an internal switching frequency of 1.5MHz
that allows the use of small surface mount inductors
and capacitors for portable product implementations.
Integrated Soft Start (SS), Under Voltage Lock Out
(UVLO), Thermal Shutdown Detection (TSD) and
Short Circuit Protection are designed to provide
reliable product applications.
The device is available in adjustable output voltage
version ranging from 0.6V to 0.9×V_IN when input
voltage range is from 2.5V to 5.5V, and is able to
deliver up to 1.2A.
The AP3410B is available in SOT-23-5 package.
Features
• High Efficiency Buck Power Converter
• Wide Input Voltage Range: 2.5V to 5.5V
• Adjustable Output Voltage: 0.6V to 0.9×V_IN
• Low R_DS(ON) Internal Switches:200mΩ (V_IN=5V)
• Built-in Power Switches for Synchronous
Rectification with High Efficiency
• Output Current: 1.2A
• Feedback Voltage: 600mV
• 1.5MHz Constant Frequency Operation
• Thermal Shutdown Protection
• Low Dropout Operation at 100% Duty Cycle
• No Schottky Diode Required
• Input Over Voltage Protection
• Output Over Voltage Protection
• Over Current Protection
Applications
• Post DC-DC Voltage Regulation
• PDA and Notebook Computer
Jun. 2013 Rev. 1. 0
SOT-23-5
Figure 1. Package Type of AP3410B
BCD Semiconductor Manufacturing Limited
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