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MICROCHIP LM2576WT product image
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MICROCHIP LM2576WTRoHS

Manufacturer
MICROCHIP
MPN
LM2576WT
LCSC Part #
C641105
Packaging
TO-220-5
Customer #
Key Attributes
52 kHz Simple 3A Buck Regulator
Datasheetpdf iconMICROCHIP LM2576WT
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QtyUnit PriceTotal Amount
1+$ 4.881$ 4.88
10+$ 4.2022$ 42.02
30+$ 3.7974$ 113.92
100+$ 3.3895$ 338.95
500+$ 3.2005$ 1600.25
1,000+$ 3.1154$ 3115.40
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Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Voltage Regulators - DC DC Switching Regulators
ManufacturerMICROCHIP
PackagingTO-220-5
Operating Temperature-40℃~+125℃@(TJ)
Frequency - Switching52kHz
FunctionStep-down type
Number of Outputs1
FeaturesCycle-by-cycle current limiting;Overcurrent Protection
Output TypeAdjustable
TopologyBuck
Operating Voltage4V~40V
Switch tube (built-in/external)Built-in
Output Voltage1.23V~37V
Output Current3A
Quiescent Current5mA
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Introduction

AI Translation

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.

Features

AI Translation
  • 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
  • Specified 3A Output Current
  • Wide Input Voltage Range of 4V to 40V
  • Wide Output Voltage Range of 1.23V to 37V
  • Requires Only Four External Components
  • 52kHz Fixed-Frequency Internal Oscillator
  • Low Power Standby Mode |Q Typically <200μA
  • 80% Efficiency (Adjustable Version Typically >80%)
  • Uses Readily Available Standard Inductors
  • Thermal Shutdown and Current Limit Protection
  • 100% Electrical Thermal Limit Built-In

Applications

AI Translation
  • Simple High-Efficiency Step-Down (Buck) Regulator
  • Efficient Pre-Regulator for Linear Regulators
  • On-Card Switching Regulators
  • Positive and Negative Converter (Inverting Buck-Boost)
  • Isolated Flyback Converter using Minimum Number of External Components
  • Negative Boost Converter