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Switching Voltage Regulators 1A SD Vtg Reg

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LM2575HVT-15/NOPB General Description

The LM2575 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator.

The LM2575 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in many cases no heat sink is required.

A standard series of inductors optimized for use with the LM2575 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.

Other features include a specified ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50 μA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.


Key Features

  • 3.3V, 5V, 12V, 15V, and Adjustable Output Versions
  • Adjustable Version Output Voltage Range,
    • ?1.23V to 37V (57V for HV Version) ±4% Max Over
    • ?Line and Load Conditions
  • Specified 1A Output Current
  • Wide Input Voltage Range, 40V up to 60V for HV Version
  • Requires Only 4 External Components
  • 52 kHz Fixed Frequency Internal Oscillator
  • TTL Shutdown Capability, Low Power Standby Mode
  • High Efficiency
  • Uses Readily Available Standard Inductors
  • Thermal Shutdown and Current Limit Protection
  • P+ Product Enhancement Tested

All trademarks are the property of their respective owners.


  • Simple and High-Efficiency Step-Down (Buck) Regulators
  • Efficient Pre-Regulator for Linear Regulators
  • On-Card Switching Regulators
  • Positive to Negative Converters (Buck-Boost)
  • Negative Step-Up Converters
  • Power Supply for Battery Chargers


Vin (min) (V) 4 Vin (max) (V) 60
Vout (min) (V) 3.3 Vout (max) (V) 57
Iout (max) (A) 1 Iq (typ) (mA) 10
Switching frequency (min) (kHz) 42 Switching frequency (max) (kHz) 63
Features Enable, Over Current Protection Operating temperature range (°C) -40 to 125
Rating Catalog Regulated outputs (#) 1
Control mode Voltage mode Duty cycle (max) (%) 98
Type Converter Case/Package TO-220
Contact Plating Tin Mount Through Hole
Number of Pins 5 Weight 4.535924 g
Efficiency 88 % Max Input Voltage 60 V
Max Operating Temperature 125 °C Max Output Current 1 A
Max Output Voltage 15 V Min Input Voltage 4 V
Min Operating Temperature -40 °C Number of Channels 1
Number of Outputs 1 Operating Supply Voltage 60 V
Output Current 1 A Output Type Fixed
Output Voltage 15 V Quiescent Current 10 mA
Schedule B 8542390000 Switching Frequency 58 kHz
Height 4.7 mm Length 10.16 mm
Thickness 4.58 mm

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Ratings and Reviews

C**b Mar 04, 2024

Everything fits perfectly. Pancake only almost the entire period waited and until the completion of the order i have two days left. And so i recommend.



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