1.4MHz High Efficiency Synchronous DC-DC Buck Converter
Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
General Description
The AP3407/A is ...
Description
Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A
General Description
The AP3407/A is a 1.4MHz fixed frequency, current mode, PWM synchronous buck (step-down) DC-DC converter, capable of driving a 1.2A load with high efficiency, excellent line and load regulation. The device integrates synchronous P-channel and N-channel power MOSFET switches with low on-resistance. It is ideal for powering portable equipment that runs from a single Li-ion battery.
A standard series of inductors are available from several different manufacturers optimized for use with the AP3407/A. This feature greatly simplifies the design of switch-mode power supplies.
The AP3407/A is available in SOT-23-5.
Features
Input Voltage Range: 2.5V to 5.5V Output Voltage: 0.6V to VIN ADJ Output Fixed 1.4MHz Frequency High Efficiency up to 95% Output Current: 1.2A Current Mode Control 100% Duty Cycle in Dropout Built-in Over Current Protection Built-in Short Circuit Protection Built-in Thermal Shutdown Protection Built-in UVLO Function Built-in Soft-start
Applications
Datacom Portable Device Smart Phone
Dec. 2011 Rev. 1. 3
SOT-23-5
Figure 1. Package Type of AP3407/A
BCD Semiconductor Manufacturing Limited 1
Data Sheet 1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A Pin Configuration
K Package (SOT-23-5)
EN 1 GND 2 SW 3
5 FB 4 VIN
VIN 1 GND 2 EN 3
5 SW 4 FB
(For AP3407)
(For AP3407A)
Figure 2. Pin Configuration of AP3...
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