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Diodes Semiconductor Electronic Components Datasheet

AP3427M Datasheet

1.5MHZ Synchronous Step-down DC-DC Converter

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AP3427M pdf
Preliminary Datasheet
Dual 1A, 1.5MHZ Synchronous Step-down DC-DC Converter AP3427M
General Description
The AP3427M is a high efficiency step-down dual
channel 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
ranging from 0.6V to 0.9×VIN when input voltage
range is from 2.5V to 5.5V, and is able to deliver up
to 1A.
The AP3427M is available in standard DFN-3×3-10
package.
Features
• High Efficiency Buck Power Converter
• Output Current: 1.0A
• Low RDS(ON) Internal Switches:200mΩ (VIN=5V)
• Adjustable Output Voltage from 0.6V to 0.9×VIN
• Wide Operating Voltage Range: 2.5V to 5.5V
• Built-in Power Switches for Synchronous
Rectification with High Efficiency
• Feedback Voltage: 600mV
• 1.5MHz Constant Frequency Operation
• Thermal Shutdown Protection
• Low Drop-out Operation at 100% Duty Cycle
• Input Over Voltage Protection
• No Schottky Diode Required
Applications
Post DC-DC Voltage Regulation
• PDA and Notebook Computer
DFN-3×3-10
Figure 1. Package Type of AP3427M
Mar. 2013 Rev. 1.0
BCD Semiconductor Manufacturing Limited
1


Diodes Semiconductor Electronic Components Datasheet

AP3427M Datasheet

1.5MHZ Synchronous Step-down DC-DC Converter

No Preview Available !

AP3427M pdf
Preliminary Datasheet
Dual 1A, 1.5MHZ Synchronous Step-down DC-DC Converter AP3427M
Pin Configuration
DN Package
DFN-3×3-10
Figure 2. Pin Configuration of AP3427M (Top View)
Pin Description
Pin Number
1
2
3
4, 9, Exposed Pad
5
6
7
8
10
Pin Name
EN1
FB1
VIN2
GND
LX2
EN2
FB2
VIN1
LX1
Function
Enable signal input of channel 1, active high
Feedback voltage of channel 1
Power supply input of channel 2
GND. It should be connected to system ground
Connected from channel 2’s Power MOSFET to inductor
Enable signal input of channel 2, active high
Feedback voltage of channel 2
Power supply input of channel 1
Connected from channel 1’s Power MOSFET to inductor
Mar. 2013 Rev. 1.0
BCD Semiconductor Manufacturing Limited
2


Part Number AP3427M
Description 1.5MHZ Synchronous Step-down DC-DC Converter
Maker BCD Semiconductor
Total Page 11 Pages
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1 AP3427M 1.5MHZ Synchronous Step-down DC-DC Converter BCD Semiconductor
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AP3427M pdf




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