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AP3431

BCD Semiconductor
Part Number AP3431
Manufacturer BCD Semiconductor
Description Synchronous Step Down DC-DC Converter
Published Aug 17, 2015
Detailed Description Data Sheet 1.0MHz, 2.0A, Synchronous Step Down DC-DC Converter AP3431 General Description The AP3431 is a high effici...
Datasheet PDF File AP3431 PDF File

AP3431
AP3431

Overview
Data Sheet 1.
0MHz, 2.
0A, Synchronous Step Down DC-DC Converter AP3431 General Description The AP3431 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 MOS switchers.
The oscillator and timing capacitors are all built-in providing an internal switching frequency of 1MHz 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 versions ranging from 0.
8V to 0.
9×VIN when input voltage range is from 2.
7V to 5.
5V , and is able to deliver up to 2.
0A.
The AP3431 is available in SOIC-8 package.
Features • High Efficiency Buck Power Converter • Output Current: 2A • Low RDS(ON) Internal Switches : 120mΩ(VIN=5V) • Adjustable Output Voltage from 0.
8V to 0.
9×VIN • Wide Operating Voltage Range: 2.
7V to 5.
5V • Built-in Power Switches for Synchronous Rectification with High Efficiency • Feedback Voltage: 800mV • Switching Frequency: 1.
0MHz • Thermal Shutdown Protection • Internal Soft Start Applications • LCD TV • Set Top Box • Post DC-DC Voltage Regulation • PDA and Notebook Computer Nov.
2011 Rev.
1.
0 SOIC-8 Figure 1.
Package Type of AP3431 BCD Semiconductor Manufacturing Limited 1 1.
0MHz, 2.
0A, Synchronous Step Down DC-DC Converter Pin Configuration Data Sheet AP3431 M Package (SOIC-8) 18 27 36 45 Figure 2.
Pin Configuration of AP3431 (Top View) Pin Description Pin Number 1 2 3 4 5 6 7 8 Pin Name VCC NC GND FB EN PGND SW VIN Function Supply input for the analog circuit No connection Ground pin Feedback pin.
Receives the feedback voltage from a resistive divider connected across the output Chip enable pin.
Active high, internal pull-high with 200kΩ resistor Power switch ground pin Switch ou...


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