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TD1583 Datasheet

3A 380Khz 28V PWM Buck DC/DC Converter

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3A 380KHZ 28V PWM Buck DC/DC Converter
Datasheet
TD1583
General Description
Features
The TD1583 is a 380 KHz fixed frequency
monolithic step down switch mode regulator
with a built in internal Power MOSFET. It
achieves 3A 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.
The TD1583 serves as ideal power supply
units for portable devices.
 3A Constant Output Current
 80mRDSON Internal Power PMOSFET
Switch
 Up to 95% Efficiency
 Fixed 380KHz Frequency
 Wide 3.6V to 28V Input Voltage Range
 Output Adjustable from 1.222V to 26V
 Built in Frequency Compensation
 Built in Thermal Shutdown Function
 Built in Current Limit Function
 SOP-8 Package is Available
 The minimum dropout up to 0.3V
 Applications
 Portable DVD
 LCD Monitor / TV
 Battery Charger
 ADSL Modem
 Telecom / Networking Equipment
Figure 1 Package Type of TD1583
September, 2006
Techcode Semiconductor Limited
1



Techcode
Techcode

TD1583 Datasheet Preview

TD1583 Datasheet

3A 380Khz 28V PWM Buck DC/DC Converter

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TD1583 pdf
www.DataSheet4U.com
3A 380KHZ 28V PWM Buck DC/DC Converter
Pin Configurations
Datasheet
TD1583
Figure 2 Pin Configuration of TD1583 (Top View)
Pin Description
Pin Number Pin Name Description
1,6, 8
NC Not Connect.
Supply Voltage Input Pin. TD1583 operates from a 3.6V to 28V
2 Vin DC voltage. Bypass Vin to GND with a suitably large capacitor
to eliminate noise on the input.
3
SW
Power Switch Output Pin. SW is the switch node that supplies
power to the output.
Ground Pin. Care must be taken in layout. This pin should be
4
GND
placed outside of the Schottky Diode to output capacitor ground
path to prevent switching current spikes from inducing voltage
noise into TD1583.
Feedback Pin. Through an external resistor divider network, FB
5 FB senses the output voltage and regulates it. The feedback
threshold voltage is 1.222V.
Enable Pin. EN is a digital input that turns the regulator on or
7 EN off.Drive EN pin high to turn on the device, drive it low to turn
it off.
Ordering Information
TD1583
X
X
Circuit Type
Package
P: SOP8
September, 2006
Packing
Blank: Tube
R: Type and Reel
Techcode Semiconductor Limited
2


Part Number TD1583
Description 3A 380Khz 28V PWM Buck DC/DC Converter
Maker Techcode
Total Page 13 Pages
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