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HomeCommunitySubjectLM2575 Step-Down Switching Regulators: Datasheet pdf, Equivalents and Circuit

LM2575 Step-Down Switching Regulators: Datasheet pdf, Equivalents and Circuit

PMIC - Voltage Regulators - DC DC Switching Regulators TO-263-6, D2Pak (5 Leads + Tab), TO-263BA -40°C~125°C TJ 52kHz LM2575 82 % IC REG BUCK ADJ 1A TO263-5

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Oct 30, 2021

Bonnie Bauer

How to make Step down voltage regulator using LM2576

PMIC - Voltage Regulators - DC DC Switching Regulators TO-263-6, D2Pak (5 Leads Tab), TO-263BA -40°C~125°C TJ 52kHz LM2575 82 % IC REG BUCK ADJ 1A TO263-5

The LM2575 step-down switching regulator is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5A load with excellent line and load regulation. This article will explain datasheet pdf, pinout, circuit, equivalents, and other details about LM2575 regulators.

LM2575WU

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LM2575 Pinout

A pinout schematic for an LM2576 buck voltage regulator is shown here. It can operate in either a fixed or variable voltage mode. Refer to the following section for more information about each pin.

LM2575 Pinout

 

Pin No Pin Name Description
1 Vin Input Voltage Pin
2 OUT Output Pin
3 GND Ground Pin
4 FB Feedback Pin
5 ON’/OFF Complement On/Off Pin

LM2575 Description

The LM2575 regulators are monolithic integrated circuits that are perfect for designing a step-down switching regulator quickly and easily (buck converter). This series' circuits can all drive a 1.0 A load with excellent line and load regulation. Its fixed output voltages of 3.3 V, 5.0 V, 12 V, and 15 V, as well as an adjustable output version, are offered.

These regulators were created to reduce the number of external components in the power supply architecture. Several inductor manufacturers offer standard series inductors that are tailored for use with the LM2575.

LM2575 CAD Model

LM2575 Symbol

LM2575 Footprint

LM2575 3D Model

Specifications

LM2575WU Tech Specifications

Microchip Technology LM2575WU technical specifications, attributes, parameters and parts with similar specifications to Microchip Technology LM2575WU.

Product Attribute Attribute Value
Factory Lead Time6 Weeks
MountSurface Mount
Mounting TypeSurface Mount
Package / CaseTO-263-6, D2Pak (5 Leads + Tab), TO-263BA
Number of Pins5Pins
Supplier Device PackageTO-263-5
Operating Temperature-40°C~125°C TJ
PackagingTube
Published2009
Part StatusActive
Moisture Sensitivity Level (MSL)3 (168 Hours)
Max Operating Temperature85°C
Min Operating Temperature-40°C
Product Attribute Attribute Value
Base Part NumberLM2575
FunctionStep-Down
Number of Outputs1Output
Efficiency82 %
Voltage - Input (Max)40V
Output Voltage37V
Output TypeAdjustable
Max Output Current1A
Voltage - Input (Min)4V
Nominal Supply Current5mA
Output ConfigurationPositive
Max Output Voltage37V
Voltage - Output (Min/Fixed)1.23V
Product Attribute Attribute Value
TopologyBuck
Min Input Voltage4V
Frequency - Switching52kHz
Max Input Voltage40V
Synchronous RectifierNo
Min Output Voltage1.23V
Height4.59mm
Length10.67mm
Width9.17mm
REACH SVHCNo SVHC
RoHS StatusROHS3 Compliant
Lead FreeLead Free
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LM2575 Block Diagram

LM2575 Block Diagram

LM2575 Features

  • Requires only 4 external components

  • 52 kHz fixed-frequency internal oscillator

  • Adjustable version output voltage range, 1.23V to 37V (57V for HV version) ±4% max over

  • Guaranteed 1A output current

  • Wide input voltage range, 40V up to 60V for HV version

  • TTL shutdown capability, low power standby mode High efficiency

  • Uses Readily Available Standard Inductors

  • Thermal Shutdown and Current Limit Protection

  • Moisture Sensitivity Level (MSL) Equals 1

LM2575 Applications

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

  • Efficient pre-regulator for linear regulators

  • On-card switching regulators

  • Positive to the negative converter (Buck-Boost)

LM2575 Equivalents

LM2576, LM2677, LM1117, CS51411, LM723, LM7912

How to use LM2575 in circuit?

The LM2575 circuit is a basic step-down dc-regulated switching IC with an adjustable output current of 1A and voltages of 3.3V, 5V, 12V, and 15V.

LM2575 Application Circuit

Both continuous and discontinuous operation modes are supported by the LM2575. The circuit functions in the continuous mode (inductor current continually flowing) while the load currents are relatively high, but when the load currents are low, the circuit is forced to operate in the discontinuous mode (inductor current falls to zero for some time). This intermittent style of operation is OK. It may be preferable to run the regulator in the discontinuous mode for light loads (less than 200 mA), owing to the lower inductor values required in the discontinuous mode.

LM2575 Package Dimensions

 LM2575 Package Dimensions

LM2575 Manufacturer

Microchip Technology Inc., is a leader that provides microcontroller and analog semiconductors. The microchip was headquartered in Chandler, Arizona. We are dedicated to offering low-risk product development, reducing total system cost, and accelerating time to market. We mainly serve different fields of customers applications around the world. To provide prominent technical support along with reliable delivery and quality is our goal.

Datasheet PDF

LM2575WU Documents

Download datasheets and manufacturer documentation for LM2575WU

Frequently Asked Questions

What is the use of LM2575?
The LM2575 is characterized for operation over the virtual junction temperature range of –40°C to 125°C. The LM2575 device greatly simplifies the design of switching power supplies by conveniently providing all the active functions needed for a step-down (buck) switching regulator in an integrated circuit.
How does LM2575 work?
LM2575 is specially designed to simplify the design of switching power supplies. It can be done by providing all the necessary active functions required in Integrated Circuit (IC) for step-down regulators. LM-2575 can deliver a load current of around 1A along with good line regulation as well as load regulation.
What is the current of LM2575?
Accepting a wide input voltage range and available in an adjustable output version, the LM2575 has an integrated switch capable of delivering 1 A of load current, with excellent line and load regulation.
What is the voltage of LM2575?
These devices are available in fixed output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version. These regulators were designed to minimize the number of external components to simplify the power supply design.
FAQ
What is the use of LM2575?
The LM2575 is characterized for operation over the virtual junction temperature range of –40°C to 125°C. The LM2575 device greatly simplifies the design of switching power supplies by conveniently providing all the active functions needed for a step-down (buck) switching regulator in an integrated circuit.
How does LM2575 work?
LM2575 is specially designed to simplify the design of switching power supplies. It can be done by providing all the necessary active functions required in Integrated Circuit (IC) for step-down regulators. LM-2575 can deliver a load current of around 1A along with good line regulation as well as load regulation.
What is the current of LM2575?
Accepting a wide input voltage range and available in an adjustable output version, the LM2575 has an integrated switch capable of delivering 1 A of load current, with excellent line and load regulation.
What is the voltage of LM2575?
These devices are available in fixed output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version. These regulators were designed to minimize the number of external components to simplify the power supply design.

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