MIC4576WU More Semiconductors - ICs by Microchip Technology

200kHz 3.0A Step-down Regulator

Status: Active
Series: MIC4576
RoHS: Compliant
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The MIC4576 is a series of easy to use fixed and adjustable BiCMOS step-down (buck) switch-mode voltage regulators. The 200kHz MIC4576 duplicates the pinout and function of the 52kHz LM2576. The higher switching frequency may allow up to a 2:1 reduction in output filter inductor size.

The MIC4576 is available in 3.3V, and 5V fixed output versions or a 1.23V to 33V adjustable output version. Both versions are capable of driving a 3A load with excellent line and load regulation.

The feedback voltage is guaranteed to ±2% tolerance for adjustable versions, and the output voltage is guaranteed to ±3% for fixed versions, within specified voltages and load conditions. The oscillator frequency is guaranteed to ±10%.

In shutdown mode, the regulator draws less than 200µA standby current. The regulator performs cycle-by-cycle current limiting and thermal shutdown for protection under fault conditions.

This series of simple switch-mode regulators requires a minimum number of external components and can operate using a standard series of inductors. Frequency compensation is provided internally.

The MIC4576 is available in TO-220 (T) and TO-263 (U) packages for the industrial temperature range.

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Prices starting from US$3.47

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Fixed 200kHz operation
3.3V, 5V, 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 switch current
Wide input voltage range: 4V to 36V
Wide output voltage range: 1.23V to 33V
Requires minimum external components
< 200µA typical shutdown mode
75% efficiency (adjustable version > 75% typical)
Standard inductors are 25% of typical LM2576 values
Thermal shutdown
Overcurrent protection
100% electrical thermal limit burn-in


Regulator Type Step Down (Buck)
pricing 0
Supported Output 0
Minimum Input Voltage (V) 0
Maximum Input Voltage (V) 36
Output Current (mA) Max 0
Maximum Frequency (kHz) 0
Vref (V) 0
Duty Cycle Min (%) 0
Duty Cycle Max (%) 0.95
Switching Frequency (kHz) 200
Input Voltage Range Min 4
Input Voltage Range Max 36
Output Current 3000
Temp Range Min -40
Temp Range Max 85
Vout Min (V) 1.23
Quiescent Current (mA) typ 5
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, 200Khz-To-263-5 | Newark Electronics
VOLTAGE REG, BUCK, 3A, TO-263-5 | element14
Microchip Switching Voltage Regulator TO-263 3A | Distrelec
IC: PMIC | Transfer Multisort Elektronik
MIC4576 Series 36 V 200 kHz 3 A Surface Mount Simple Buck Regulator - TO-263-5 | Future Electronics
Conv DC-DC Single Step Down 4V to 36V 5-Pin TO-263 Tube | Avnet America

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MIC4576WU?

Additional datasheets, footprints and schematics for MIC4576WU are listed on our Part Details page. You can also find images and similar parts to MIC4576WU on this page.

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What category does MIC4576WU fall under?

The MIC4576WU is listed under Semiconductors - ICs > More Semiconductors - ICs.

Can I view similar or alternative parts?

You can view similar parts to MIC4576WU when available in the More Semiconductors - ICs range under the specifications section at the bottom of the details page.

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Is the MIC4576WU RoHS compliant?

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

Which authorised distributors for MIC4576WU have stock available?

Authorised distributors including Newark Electronics, element14, Farnell, Distrelec and Transfer Multisort Elektronik have stock available or on a lead time for MIC4576WU.

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