Datasheet
2.5A 150KHZ PWM Buck DC/DC Converter
TD1507
October, 20, 2005.
Techcode Semiconductor Limited
1
General Description
The TD1507 is a easy to use adjustable
step-down (buck) switch-mode voltage regulators.
The device is available in an adjustable output
version. It is capable of driving a 2.5A load with
excellent line and load regulation.
Requiring
a
minimum
number
of
external
components, the regulator is simple to use and
include internal frequency compensation, and a
fixed-frequency oscillator.
The
output
voltage
is
guaranteed
to
±3%
tolerance under specified input voltage and
output load conditions. The oscillator frequency is
guaranteed to ±15%. External shutdown is
included, featuring typically 80 µA standby current.
Self protection features include a two stage
frequency reducing current limit for the output
switch and an over temperature shutdown for
complete protection under fault conditions.
The TD1507 is available in TO252-5L package.
Features
•
Adjustable output version
•
Output adjustable from 1.23v to 34V
•
Fixed 150KHz frequency internal oscillator
•
Guaranteed 2.5A output load current
•
Input voltage range up to 36V
•
Low power standby mode, IQ typically 70 µA
•
TTL shutdown capability
•
Excellent line and load regulation
•
High efficiency
•
Thermal shutdown and current limit protection
•
Available in TO252-5L package
Applications
•
Simple High-efficiency step-down regulator
•
On-card switching regulators
•
Positive to negative converter
•
LCD monitor and LCD TV
•
DVD recorder and PDP TV
•
Battery charger
•
Step-down to 3.3V for microprocessors
Package Types
TO252-5L
Figure 1. Package Types of TD1507