MIC4576-3.3WU-TR
Voltage Regulators - DC DC Switching Regulators
Technical Specifications
| Type | Description |
|---|---|
| Output Type | Fixed |
| Output Voltage | 3.3 V |
| Output Current | 3 A |
| Function | Step-down type |
| Working Voltage V | 20 V |
| Switching Freq Hz | 200 kHz |
| Channels | 1 |
| Type | Description |
|---|---|
| Iq A | 0.005 A |
| Switch tube (built-in/external) | Built-in |
| Operating Temp | -40°C ~ +85°C @(TA) |
| Features | Cycle-by-cycle current limiting;Overcurrent Protection |
| Topology | Buck |
| Package / Case | TO-263-5 |
Product Introduction
The MIC4576 is a series of easy-to-use fixed and adjustable BiCMOS step-down (buck) switch-mode voltage regulators. The 200 kHz MIC4576 duplicates the pinout and function of the 52 kHz 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 200 μA shutdown 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.
Features
- Fixed 200 kHz Operation
- 3.3V, 5V, and Adjustable Output Versions
- Voltage Over Specified Line and Load Conditions: - Fixed version: ±3% maximum output voltage - Adjustable version: ±2% maximum feedback voltage
- Guaranteed 3A Switch Current
- Wide 4V to 36V Input Voltage Range
- Wide 1.23V to 33V Output Voltage Range
- Requires Minimum External Components
- <200 μA Typical Shutdown Mode
- 75% Efficiency (Adjustable Version >75% Typical)
- Standard Inductors are 25% of Typical LM2576 Inductor Values
- Thermal Shutdown
- Overcurrent Protection
- 100% Electrical Thermal Limit Burn-In
Applications
- - Simple High-Efficiency Step-Down (Buck) Regulator - Efficient Preregulator for Linear Regulators - On-Card Switching Regulators - Positive-to-Negative Converter (Inverting Buck-Boost) - Battery Charger - Negative Boost Converter - Step-Down to 3.3V for Intel Pentium and Similar Microprocessors
Datasheet
Alternative Parts
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Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
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