LM2576-12WU by Microchip Technology

3A Step-Down SMPS Regulator

Status: Active
Series: LM2576
RoHS: Compliant
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The LM2576 series of monolithic integrated circuits provide all the active functions for a step-down (buck) switching regulator. Fixed versions are available with a 3.3V, 5V, or 12V fixed output. Adjustable versions have an output voltage range from 1.23V to 37V. Both versions are capable of driving a 3A load with excellent line and load regulation.

These regulators are simple to use because they require a minimum number of external components and include internal frequency compensation and a fixed-frequency oscillator.

The LM2576 series offers a high efficiency replacement for popular three-terminal adjustable 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 available from several different manufacturers are ideal for use with the LM2576 series. This feature greatly simplifies the design of switch-mode power supplies.

The feedback voltage is guaranteed to ±2% tolerance for adjustable versions, and the output voltage is guaranteed to ±3% for fixed versions, within specified input voltages and output load conditions. The oscillator frequency is guaranteed to±10%. External shutdown is included, featuring less than 200µA standby current. The output switch includes cycle-by-cycle current limiting and thermal shutdown for full protection under fault conditions.

Prices starting from US$1.29


Distributor Starting From Stock
Logo for Microchip Technology Microchip Technology US$1.29
733
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Logo for Newark Electronics Newark Electronics US$1.40
187
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Logo for Farnell Farnell US$1.52
187
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Logo for Future Electronics Future Electronics US$1.46
-
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Logo for Avnet America Avnet America US$1.79
-
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Logo for EBV Elektronik EBV Elektronik -
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Logo for Avnet Silica Avnet Silica -
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Features

3.3V, 5V, 12V, and adjustable output versions
Voltage over specified line and load conditions:
Fixed version: ±3% max. output voltage
Adjustable version: ±2% max. feedback voltage
Guaranteed 3A output current
Wide input voltage range: 4V to 40V
Wide output voltage range: 1.23V to 37V
Requires only 4 external components
52kHz fixed frequency internal oscillator
Low power standby mode IQ typically < 200µA
80% efficiency (adjustable version typically > 80%)
Uses readily available standard inductors
Thermal shutdown and current limit protection
100% electrical thermal limit burn-in

Specifications

Regulator Type Step Down (Buck)
pricing 0
Supported Output 0
Minimum Input Voltage (V) 0
Maximum Input Voltage (V) 40
Output Current (mA) Max 0
Maximum Frequency (kHz) 0
Vref (V) 0
Duty Cycle Min (%) 0
Duty Cycle Max (%) 0.98
Switching Frequency (kHz) 52
Input Voltage Range Min 4
Input Voltage Range Max 40
Output Current 3000
Temp Range Min -40
Temp Range Max 125
Vout Min (V) 1.23
Quiescent Current (mA) typ 30
Light Load Efficiency Mode No
Switch current (A) typ 0
Automotive Rated No
SHUTDOWN Current (µA) (Typ) 50
# of Outputs 1
Vfb (V) 1.23
Synchronous Rectifier No
Pins | Packaging 5 | DDPAK
Temp Range -40C to +85C
Packing Media Tube (50)

Environmental Information

JEDEC Indicator e3
ROHS Compliant
China EFUP Compliant
Device Weight (g) 1.4625
Shipping Weight (kg) 2.52
Lead Count 5
Package Type DDPAK
Soldering Composition Matte Tin

Alternative Descriptions

Dc/Dc Conv, Buck, 52Khz, To-263-5 | Newark Electronics
DC/DC CONV, BUCK, 52KHZ, TO-263-5 | Farnell
LM2576 Series 40 V 52 kHz 3 A Simple Step-Down Buck Regulator - TO-263-5 | Future Electronics
3A STEP-DOWN SMPS REGULATOR | Avnet America


Frequently Asked Questions

Where can I find additional details, specifications and documents for a LM2576-12WU?

Additional datasheets, footprints and schematics for LM2576-12WU are listed on our Part Details page. You can also find images and similar parts to LM2576-12WU on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for LM2576-12WU on our Product Comparison page. Access via the 'View Pricing & Stock' button to view LM2576-12WU price breaks, MOQs, lead times, inventory and SKUs from distributors.

Who can I contact for technical support of the product?

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Is the LM2576-12WU RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Microchip Technology.

Which authorised distributors for LM2576-12WU have stock available?

Authorised distributors including Microchip Technology, RS, Newark Electronics, Farnell and Future Electronics have stock available or on a lead time for LM2576-12WU.

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