DC-DC降压IC TD1501 (替代LM2576 LM2596)

General Description
The TD1501H is a series of easy to use fixed and
adjustable step-down (buck) switch-mode voltage
regulators. These devices are available in fixed output
voltage of 3.3V, 5V, and an adjustable output version.
Both versions are capable of driving a 3A load with
excellent line and load regulation.
Requiring a minimum number of external components,
these regulators are simple to use and include internal
frequency compensation, and a fixed-frequency
oscillator.
The output voltage is guaranteed to &plun;3% tolerance under
specified input voltage and output load conditions. The
oscillator frequency is guaranteed to &plun;15%. External
shutdown is included, featuring tically 80 μA standby
current. Self proteion features include a two stage
frequency reducing current limit for the output switch and
an over temperature shutdown for complete proteion
under fault conditions.
The TD1501H is available in TO-220B-5L TO220-5L and
TO-263-5L packages.
Features
z 3.3V, 5V and adjustable output versions
z Output adjustable from 1.23v to 54V
z Fixed 150KHz frequency internal oscillator
z Guaranteed 3A output load current
z Input voltage range up to 60V
z Low power standby mode, IQ tically 80 μA
z TTL shutdown capability
z Excellent line and load regulation
z Requires only 4 external components
z High efficiency
z Thermal shutdown and current limit proteion
z Available in TO-220B/TO220 and TO-263
Applications
z Simple High-efficiency step-down regulator
z On-card switching regulators
z Positive to negative converter
z LCD monitor and LCD TV
z DVD recorder and PDP TV
z Battery charger
z Step-down to 3.3V for microprocessors