Diodes AP3410 - Manual

Preliminary Datasheet
1.5MHz Synchronous Step-down DC-DC Converter AP3410
Mar. 2013 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
1
General Description
The AP3410 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 AP3410 is available in SOT-23-5 and
DFN-2×2-6 packages.
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:200m
Ω (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
Figure 1. Package Types of AP3410
SOT-23-5 DFN-2Ч2-6