2A 380KHz 32V PWM Buck DC/DC Converter
Description
T echcode®
2A 380KHz 32V PWM Buck DC/DC Converter
DATASHEET
TD1591
General Description
Features
The TD1591 is a 380 KHz fixed frequency monolithic step down switch mode regulator with a built in internal Power MOSFET.
It achieves 2A continuous output current over a wide input supply range with excellent load and line regulation.
The device includes a voltage reference, oscillation circuit, error amplifier, internal PMOS and etc.
The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%.
An enable function, an over current protection function and a short circuit protection function are built inside.
An internal compensation block is built in to minimize external component count.
z 2A Constant Output Current z 80mΩ RDSON Internal Power PMOSFET Switch z Up to 95% Efficiency z Fixed 380KHz Frequency z Wide 3.
6V to32V Input Voltage Range z Output Adjustable from 1.
222V to 30V z Built in Frequency Compensation z Built in Thermal Shutdown Function z Built in Current Limit Function z SOP-8 Package is Available z The minimum dropout up to 0.
3V
The TD1591 serves as ideal power supply units for Applications
portable devices.
z Portable DVD z LCD Monitor / TV z Battery Charger z ADSL Modem
z Telecom / Networking Equipment
Package Types
Figure 1.
Package Types of TD1591
December, 23, 2009.
Techcode Semiconductor Limited www.
techcodesemi.
com 1
T echcode®
2A 380KHz 32V PWM Buck DC/DC Converter
Pin Configurations
DATASHEET
TD1591
Pin Description
Figure 2 Pin Configuration of TD1591 (Top View)
Pin Number Pin Name Description
1,6, 8 2 3
4
5 7
NC Vin SW
GND
FB EN
Not Connect.
Supply Voltage Input Pin.
TD1591 operates from a 3.
6V to 32V DC voltage.
Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input.
Power Switch Output Pin.
SW is the switch node that...
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