AP3406 Datasheet, PDF (1/2 Pages) BCD Semiconductor Manufacturing Limited – 1.1MHz, 650mA SYNCHRONOUS DC-DC BUCK CONVERTER

Product Brief
1.1MHz, 650mA SYNCHRONOUS DC-DC BUCK CONVERTER AP3406
Description
The AP3406 is a 1.1MHz fixed frequency, current
mode, PWM synchronous buck (step-down)
DC-DC converter, capable of driving a 650mA
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 AP3406. This feature greatly simplifies
the design of switch-mode power supplies.
This IC is available in TSOT-23-5 and SOT-23-5
packages.
Parametric Table
Input Voltage Range (V)
Maximum Output Current
(Min) (mA)
Feedback Voltage (V)
2.5 to 5.5
650
0.6
Oscillator Frequency (MHz)
1.1
Efficiency V_IN=4.2V, V_OUT=3.3V 95
@200mA
(%)
V_IN=3.6V, V_OUT=1.8V 92
Features
• High Efficiency: up to 95%
• Output Current: 650mA
• 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
Benefits
• High Efficiency
• High Output Current
• Easy to Use


Additional Available Materials
• Samples
• Preliminary Datasheet
• Demo Board
• Demo Board Manual
• Application Note
• ESD Report
Jun. 2008
BCD Semiconductor Manufacturing Limited
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