Key Features

• Fixed 200 kHz operation
• 3.3V, 5V, and adjustable output versions
• Voltage over-specified line and load conditions: ±3% maximum output voltage for fixed versions and ±2% maximum feedback voltage for adjustable versions
• Guaranteed 3A switch current
• Wide 4V to 36V input voltage range and 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 and overcurrent protection
• 100% electrical thermal limit burn-in

Applications

• Simple high-efficiency step-down (buck) regulator
• Efficient pre-regulator 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

Technical Specifications

Electrical Characteristics

• Absolute Maximum Ratings:Supply Voltage (VIN): +40VShutdown Voltage (VSHDN): –0.3V to +36VOutput Switch (VSW), Steady State: –1VFeedback Voltage (VFB) [Adjustable]: +3.8VStorage Temperature (TS): –65°C to +150°CJunction Temperature (TJ): +150°C
• Operating Ratings:Supply Voltage (VIN): +36VJunction Temperature (TJ): –40°C to +85°CPackage Thermal Resistance (TO-220, TO-263): θJA = 65°C/W, θJC = 2°C/W
• Typical Application Circuit:Output Voltage: 5V/3AInput Voltage Range: 8V to 36V

Package Information

• Package Type: 5-Pin TO-263 (DDPAK)
• Package Marking: MIC 4576-5.0WU-TR
• Package Outline Drawing: 5-Lead Transistor Outline Type LB03 (B8X) - [TO-263]

Ordering Information

• Part Number: MIC4576-5.0WU-TR
• Output Voltage: 5.0V Fixed
• Temperature Range: W = –40°C to +85°C, Industrial, RoHS-Compliant
• Package: U = 5-Lead TO-263 (DDPAK)
• Media Type: TR = 750/Reel (U, DDPAK)