LM2576T-ADJ/LF03 Part Information

Details for LM2576T-ADJ/LF03 by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Power Management

Part Description

The LM2576 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 3-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include fault protection and a fixed-frequency oscillator. The LM2576 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 LM2576 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. Other features include a ±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.

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Part Features

  • 3.3-V, 5-V, 12-V, 15-V, and Adjustable Output Versions
  • 52-kHz Fixed-Frequency Internal Oscillator
  • Adjustable Version Output Voltage Range,1.23 V to 37 V (57 V for HV Version) u00b14% Maximum Over Line and Load Conditions
  • High Efficiency
  • Requires Only 4 External Components
  • Specified 3-A Output Current
  • TTL-Shutdown Capability, Low-Power Standby Mode
  • Thermal Shutdown and Current Limit Protection
  • Uses Readily Available Standard Inductors
  • Wide Input Voltage Range: 40 V Up to 60 V for HV Version

Part Specifications

Topology Buck (Step Down)
Input Voltage Min 4V
Input Voltage Max 40V
No. of Outputs 1Outputs
DC / DC Converter IC Case TO-220
No. of Pins 5Pins
Output Current 3A
Output Voltage Min 1.23V
Output Voltage Max 37V
Switching Frequency 52kHz
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL -
SVHC No SVHC (27-Jun-2018)
Adjustable Output Voltage Min 1.23V
Frequency 52kHz
Operating Temperature Min -40°C
Output Voltage 37V
Primary Input Voltage 40V
Supply Voltage Min 4V
Termination Type Through Hole
Voltage Regulator Type Step Down (Buck)
RoHS Compliant

Alternative Part Descriptions

  • IC, DC/DC CONVERTOR, 52KHZ, TO220-5; Topology:Buck (Step Down); Input Voltage Min:4V; Input Voltage Max:40V; No. of Outputs:1Outputs; DC / DC Converter IC Case:TO-220; No. of Pins:5Pins; Output Current:3A; Output Voltage Min:1.23V; RoHS Compliant: Yes | Newark Electronics
  • Conv DC-DC Single Inv/Step Down 4V to 40V 5-Pin(5+Tab) TO-220 Rail | Avnet America
  • SIMPLE SWITCHER® 40V, 3A Low Component Count Step-Down Regulator | Texas Instruments
  • Switching Regulator IC [Texas Instruments] LM2576T-ADJ/LF03 Switching Regulator IC | Distrelec

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