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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Microchip Technology LM2575-5.0YWM

Name: LM2575-5.0YWM
Brand: Microchip Technology
SKU: LM2575-5.0YWM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM2575-5.0YWM

Manufacturer:: Microchip Technology

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 24-SOIC (0.295", 7.50mm Width)

Datasheet:: LM2575-5.0YWM.pdf

Description:: IC REG BUCK 5V 1A 24SOIC

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Product details

Overview

LM2575-5.0YWM from Micrel is a fixed-output 5.0V, 1A step-down (buck) switching regulator with 52kHz fixed-frequency operation, ±3% output voltage tolerance over line/load, and integrated thermal shutdown and cycle-by-cycle current limiting. It operates from 4V to 40V input and delivers high-efficiency regulation in industrial power supplies and embedded DC-DC conversion.

For engineers reviewing the LM2575-5.0YWM datasheet, LM2575-5.0YWM pinout, LM2575-5.0YWM application, or LM2575-5.0YWM equivalent, key selection factors include guaranteed 1A output current, TO-263-compatible 24-pin wide SOIC package, 82% typical efficiency at 12V_IN/5V_OUT/1A, and ON/OFF control with <200µA standby current.

Technical Context

The LM2575-5.0YWM integrates a 52kHz oscillator, error amplifier with 1.23V internal reference, PWM comparator, and 1A NPN switch driver in a monolithic IC. Its feedback loop uses a fixed-resistor divider for 5.0V output, eliminating external resistor selection.

Thermal shutdown activates at 150°C junction temperature, and current limiting protects against overload by clamping peak switch current to 1.7–3.2A. The ON/OFF pin accepts TTL/CMOS logic levels (V_IL ≤ 1.0V, V_IH ≥ 2.2V) to enable/disable regulation with <200µA standby quiescent current.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 5.0V ±3% over full operating range - ensures stable logic supply without external feedback resistors.
Max Output Current	1A continuous - supports microcontroller, FPGA, and sensor subsystems without external current boosting.
Input Voltage Range	4V to 40V - accommodates 5V, 12V, 24V, and 36V industrial bus rails with margin for transients.
Switching Frequency	52kHz ±10% - enables use of low-cost, standard 330µH inductors and reduces EMI filtering complexity.
Efficiency	82% typical at 12V_IN, 5V_OUT, 1A - cuts heat sink requirements versus linear regulators and improves system thermal design.
Standby Current	<200µA when ON/OFF pin = 5V - enables low-power sleep modes in battery-backed or energy-sensitive systems.
Protection Features	Thermal shutdown + cycle-by-cycle current limit - prevents damage during short-circuit or overtemperature events without external circuitry.

Pinout & Package

LM2575-5.0YWM uses a 24-pin wide SOIC (WM) package with exposed thermal pad (pin 13 = PWR GND). Pin pitch is 1.27mm; body width is 7.5mm; thermal resistance θ_JA = 100°C/W (1 in² copper).

Pin/Terminal	Circuit Role	Design Meaning
1, 16, 23	VIN	Main input supply connection - must be decoupled with ≥100µF electrolytic capacitor near pin.
3, 4, 5, 6, 7, 8, 10, 11, 12, 14, 15, 17, 18, 19, 20, 21, 22	NC	No-connect pins - left unconnected per datasheet; no internal function or routing.
2	OUT	Switched output node - connects to inductor and catch diode; carries pulsed 1A current.
9	GND	Signal ground reference - separate from PWR GND (pin 13); requires low-impedance trace to feedback network.
13	PWR GND	Power ground return for switch and thermal pad - must be tied to large copper area for thermal dissipation.
24	ON/OFF	Active-low enable control - pulled low to enable regulation; >2.2V disables output and reduces IQ to <200µA.

Key Features

Feature	Design Value
Fixed 5.0V output	Eliminates external feedback resistors - reduces BOM count and layout sensitivity in cost-sensitive designs.
Integrated 1A NPN switch	Removes need for external MOSFET and gate driver - simplifies PCB layout and improves reliability.
52kHz oscillator	Enables use of off-the-shelf, low-DCR 330µH inductors - avoids custom magnetics and accelerates prototyping.
ON/OFF logic control	Supports system-level power sequencing and sleep/wake protocols without external logic-level translators.
Thermal shutdown + current limit	Provides autonomous fault recovery - eliminates need for external current-sense amplifiers or thermal sensors.

Applications

Industrial PLC Power Supply	Automotive Body Control Module
Use Scenario: Providing regulated 5V rail for microcontrollers and CAN transceivers in programmable logic controllers operating from 24V DC bus. IC Role / Device Role / Timing Role: Primary buck regulator converting 24V input to isolated 5V logic supply with ripple <100mV. Use Value: Delivers 1A continuously with 82% efficiency, reducing thermal load on enclosure and enabling convection-only cooling.	Use Scenario: Generating 5V for infotainment MCU and sensor interfaces in 12V automotive systems with cold-crank (4.5V) and load-dump (40V) transients. IC Role / Device Role / Timing Role: Input-tolerant buck converter maintaining regulation across wide automotive voltage range. Use Value: 4V–40V input range and ±3% output tolerance ensure stable operation during cranking and alternator surges.
Medical Point-of-Care Device	IoT Edge Gateway
Use Scenario: Powering ARM Cortex-M4-based diagnostic controller and display interface in portable medical equipment with battery backup. IC Role / Device Role / Timing Role: High-efficiency DC-DC stage minimizing battery drain while delivering clean 5V for analog front-end and digital logic. Use Value: <200µA standby current extends battery life in sleep mode; thermal shutdown prevents overheating in sealed enclosures.	Use Scenario: Converting 12V PoE-derived supply to 5V for Wi-Fi SoC, Ethernet PHY, and sensor hub in smart building gateway. IC Role / Device Role / Timing Role: Compact, low-noise buck regulator supporting burst-mode operation for intermittent data transmission. Use Value: 24-pin SOIC package allows dense layout; 52kHz frequency eases compliance with CISPR-22 Class B conducted emissions limits.

Industrial PLC Power Supply

Automotive Body Control Module

Use Scenario: Providing regulated 5V rail for microcontrollers and CAN transceivers in programmable logic controllers operating from 24V DC bus.

IC Role / Device Role / Timing Role: Primary buck regulator converting 24V input to isolated 5V logic supply with ripple <100mV.

Use Value: Delivers 1A continuously with 82% efficiency, reducing thermal load on enclosure and enabling convection-only cooling.

Use Scenario: Generating 5V for infotainment MCU and sensor interfaces in 12V automotive systems with cold-crank (4.5V) and load-dump (40V) transients.

IC Role / Device Role / Timing Role: Input-tolerant buck converter maintaining regulation across wide automotive voltage range.

Use Value: 4V–40V input range and ±3% output tolerance ensure stable operation during cranking and alternator surges.

Medical Point-of-Care Device

IoT Edge Gateway

Use Scenario: Powering ARM Cortex-M4-based diagnostic controller and display interface in portable medical equipment with battery backup.

IC Role / Device Role / Timing Role: High-efficiency DC-DC stage minimizing battery drain while delivering clean 5V for analog front-end and digital logic.

Use Value: <200µA standby current extends battery life in sleep mode; thermal shutdown prevents overheating in sealed enclosures.

Use Scenario: Converting 12V PoE-derived supply to 5V for Wi-Fi SoC, Ethernet PHY, and sensor hub in smart building gateway.

IC Role / Device Role / Timing Role: Compact, low-noise buck regulator supporting burst-mode operation for intermittent data transmission.

Use Value: 24-pin SOIC package allows dense layout; 52kHz frequency eases compliance with CISPR-22 Class B conducted emissions limits.

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM2575-5.0WU	Same electrical specs; TO-263-5 package with exposed tab for lower θ_JA (45°C/W with 4 in² copper)	Better thermal performance in high-ambient or high-duty-cycle applications; requires different footprint and reflow profile	Select LM2575-5.0WU when board space permits larger thermal pad and higher continuous power is needed.
LM2596-5.0	Higher 150kHz switching frequency, 3A output, ±2% output tolerance, but requires external compensation	Enables smaller inductors/capacitors; supports higher current loads but increases design complexity	Choose LM2596-5.0 only if 3A output or 150kHz operation is required; LM2575-5.0YWM offers simpler, proven 1A solution.

Compared with LM2575-5.0WU, the LM2575-5.0YWM trades thermal performance for compact SOIC layout; versus LM2596-5.0, it prioritizes design simplicity and legacy compatibility over higher frequency or current capability.

Availability

LM2575-5.0YWM is available at Aetrix Electronics and suitable for industrial PLC power supplies, automotive body control modules, medical point-of-care devices, and IoT edge gateways requiring stable component supply and long-term manufacturability.

Supply support for LM2575-5.0YWM includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Micrel Inc. was a U.S.-based semiconductor company specializing in power management, analog, and mixed-signal ICs before its acquisition by Microchip Technology in 2015.

The LM2575 series was designed as a drop-in, high-efficiency replacement for three-terminal linear regulators in industrial and embedded DC-DC conversion, emphasizing simplicity, thermal robustness, and minimal external component count.

FAQ

What is the maximum input voltage rating for LM2575-5.0YWM?

The absolute maximum input voltage for LM2575-5.0YWM is 45V, but the recommended operating range is 4V to 40V. Exceeding 40V may trigger internal protection or reduce reliability. This rating allows safe operation across 24V industrial buses and automotive load-dump conditions while maintaining regulation stability.

Does LM2575-5.0YWM require an external feedback resistor network?

No, LM2575-5.0YWM does not require external feedback resistors because it is a fixed-output variant with internal resistor divider set to 5.0V. This eliminates tuning errors and layout sensitivity associated with adjustable versions, making LM2575-5.0YWM ideal for production designs where consistency and BOM reduction are critical.

What thermal management considerations apply to LM2575-5.0YWM in SOIC package?

LM2575-5.0YWM in 24-pin wide SOIC has θ_JA = 100°C/W with ~1 in² copper. To maintain T_J < 125°C at 1A load, keep ambient below 50°C or add thermal vias under pin 13 (PWR GND) to inner ground planes. Avoid enclosing the IC in sealed plastic housings without airflow.

Can LM2575-5.0YWM be used in negative-output configurations?

Yes, LM2575-5.0YWM can be configured as a positive-to-negative inverting buck-boost converter per Micrel Application Note AN-8. In this topology, the IC regulates the magnitude of the negative output (e.g., –5V), using the same 52kHz oscillator and protection features - though efficiency drops to ~70% and output capacitance requirements increase.

Is LM2575-5.0YWM RoHS compliant?

Yes, LM2575-5.0YWM is RoHS compliant per the ordering information table, which lists it under "Pb-Free / RoHS Compliant" with "Y" suffix. It meets EU Directive 2011/65/EU and contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits.

LM2575-5.0YWM Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 24-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Active

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Fixed

Number of Outputs:: 1

Voltage - Input (Min):: 4V

Voltage - Input (Max):: 40V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Current - Output:: 1A

Frequency - Switching:: 52kHz

Synchronous Rectifier:: No

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-SOIC

LM2575-5.0YWM FAQ

1.How can I place an order for LM2575-5.0YWM through Aetrix?

Please submit a Request for Quotation (RFQ) for LM2575-5.0YWM on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LM2575-5.0YWM reliable?

The price and inventory of LM2575-5.0YWM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575-5.0YWM is usually 5 days.

3.What payment methods are accepted for LM2575-5.0YWM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575-5.0YWM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM2575-5.0YWM?

LM2575-5.0YWM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM2575-5.0YWM order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LM2575-5.0YWM?

For technical support, including LM2575-5.0YWM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575-5.0YWM requirements.

6.How does Aetrix verify that LM2575-5.0YWM is sourced from the original manufacturer or authorized distributors?

All LM2575-5.0YWM products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM2575-5.0YWM meets industry standards.

7.What is the process for return or replacement of LM2575-5.0YWM?

All LM2575-5.0YWM units undergo pre-shipment inspection (PSI). If there is an issue with LM2575-5.0YWM, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LM2575-5.0YWM part is unused and in its original packaging.

Return procedure for LM2575-5.0YWM:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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