MIC4576-3.3WU 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.

Prices starting from US$2.56


Distributor Starting From Stock
Logo for Microchip Technology Microchip Technology US$2.62
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Logo for Newark Electronics Newark Electronics US$3.96
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Logo for Future Electronics Future Electronics US$3.14
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Logo for Avnet America Avnet America US$4.46
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Logo for element14 element14 US$2.56
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Features

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

Specifications

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

IC, BUCK REG, 3.0A, 3.3V | Farnell
Ic, Buck Reg, 3.0A, 3.3V | Newark Electronics
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 MIC4576-3.3WU?

Additional datasheets, footprints and schematics for MIC4576-3.3WU are listed on our Part Details page. You can also find images and similar parts to MIC4576-3.3WU on this page.

What pricing and inventory information can I view?

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Is the MIC4576-3.3WU RoHS compliant?

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

Which authorised distributors for MIC4576-3.3WU have stock available?

Authorised distributors including Microchip Technology, Farnell, Newark Electronics, Future Electronics and Avnet America have stock available or on a lead time for MIC4576-3.3WU.

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