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AP3406A

BCD Semiconductor
Part Number AP3406A
Manufacturer BCD Semiconductor
Description 1.1MHz 800mA SYNCHRONOUS DC-DC BUCK CONVERTER
Published Jul 9, 2014
Detailed Description Data Sheet 1.1MHz, 800mA SYNCHRONOUS DC-DC BUCK CONVERTER AP3406A General Description The AP3406A is a 1.1MHz fixed fre...
Datasheet PDF File AP3406A PDF File

AP3406A
AP3406A

Overview
Data Sheet 1.
1MHz, 800mA SYNCHRONOUS DC-DC BUCK CONVERTER AP3406A General Description The AP3406A is a 1.
1MHz fixed frequency, current mode, PWM synchronous buck (step-down) DC-DC converter, capable of driving a 800mA load with high efficiency, excellent line and load regulation.
The device integrates a main switch and a synchronous switch without an external Schottky diode.
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 AP3406A.
This feature greatly simplifies the design of switch-mode power supplies.
This IC is available in TSOT-23-5, MSOP-10 and DFN-2×2-6(1) packages.
Features • • • • • • • • • • High Efficiency: up to 95% Output Current: 800mA Input Voltage Range: 2.
5V to 5.
5V Fixed 1.
1MHz Frequency Current Mode Control 100% Duty Cycle in Dropout Built-in Short Circuit Protection Built-in Thermal Shutdown Function Built-in Current Limit Function Shutdown Current: <1µA Applications • • • • GPS WiFi Card Portable Media Player Digital Still and Video Cameras TSOT-23-5 MSOP-10 DFN-2×2-6(1) Figure 1.
Package Types of AP3406A Feb.
2013 Rev.
1.
5 1 BCD Semiconductor Manufacturing Limited Data Sheet 1.
1MHz, 800mA SYNCHRONOUS DC-DC BUCK CONVERTER AP3406A Pin Configuration KT Package TSOT-23-5 MM Package MSOP-10 DN Package DFN-2×2-6(1) P in 1 Mark EN GND SW 1 2 3 5 FB VIN NC GND 1 2 3 4 5 10 9 8 7 6 PGND SW EN NC NC NC EN VIN 1 6 FB GND SW 2 5 4 VIN NC FB 3 4 Figure 2.
Pin Configuration of AP3406A (Top View) Pin Description Pin Number Pin Name TSOT-23-5 MSOP-10 DFN-2×2-6(1) Control input pin.
Forcing this pin above 1.
5V enables the IC.
Forcing this pin below 0.
6V shuts down the IC.
When the IC is in shutdown mode, all functions are disabled to decrease the supply current below 1µA Ground pin Power switch output pin.
Inductor connection to drain of the internal PFET and NFET switches Supply input ...


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