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LM2576HVR-ADJ

3A, 52kHz, Step-down Switching Regulator

HTC Korea 

3A, 52kHz, Step-down Switching Regulator

LM2576HV

FEATURES

 Step-down Switching Regulator

 Adjustable Version Output Voltage Range, 1.23V to 52V

± 4% Max over Line and Load conditions

 Guaranteed Output Current of 3A

 Fixed Output Voltages : 3.3V, 5.0V, 12V and 15V

 Wide Input Voltage Range 60V

 52 kHz Fixed Frequency Oscillator

 TTL Shutdown Capability, Low Power Standby Mode

 Requires only 4 External Components

 High Efficiency

 Use Readily Available Standard Inductors

 Available in TO-220, TO-263 and SOP-8PP Packages

 Thermal Shutdown and Current Limit Protection

 Moisture Sensitivity Level 3

SOP-8PP PKG

TO-263 PKG

TO-220 PKG

APPLICATION

 Simple high-efficiency step-down (buck) regulator

 Efficient pre-regulator for linear regulators

 On-card switching regulators

 Positive to negative converter (Buck-Boost)

DESCRIPSION

ORDERING INFORMATION

Device

Package

LM2576HVDP-ADJ

LM2576HVDP-X.X

SOP-8PP 8L

LM2576HVR-ADJ

LM2576HVR-X.X

TO-263 5L

LM2576HVT-ADJ

LM2576HVT-X.X

TO-220 5L

X.X = Output Voltage = 3.3, 5.0, 12, 15

The LM2576HV series of regulators are monolithic integrated circuits that provide all the active functions for a

step-down (buck) switching regulator, capable of driving 3A load with excellent line and load regulation. These

devices are available in fixed output voltages of 3.3V, 5.0V, 12V, 15V and adjustable output versions.

Requiring a minimum number of external components, these regulators are simple to use and include internal

frequency compensation and a fixed-frequency oscillator. The LM2576HV series offers a high-efficiency

replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in

some cases no heat sink is required. A standard series of inductors optimized for use with the LM2576HV are

available from several different manufacturers. This feature greatly simplifies the design of switch-mode power

supplies. Other features include a guaranteed ± 4% tolerance on output voltage within specified input voltages

and output load conditions, and ± 10% on the oscillator frequency. External shutdown is included, featuring 50uA

(typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown

for full protection under fault conditions.

Absolute Maximum Ratings (Note 1)

CHARACTERISTIC

Input Supply Voltage

ON/OFF Pin Input Voltage

Output Voltage to Ground (Steady State)

Lead Temperature (Soldering, 5 sec)

Storage Temperature Range

Maximum Junction Temperature Range

SYMBOL

VIN

TSOL

TSTG

TJOPR

MIN.

-

-0.3

-0.75

-65

-

MAX.

63

+ VIN

260

150

150

UNIT

V

V

V

℃

℃

℃

Feb. 2014 – R1.0

-1-

HTC

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