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MICROCHIP LM2576-3.3WT product image
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MICROCHIP LM2576-3.3WTRoHS

Manufacturer
MICROCHIP
MPN
LM2576-3.3WT
LCSC Part #
C641102
Packaging
TO-220-5
Customer #
Key Attributes
High Efficiency 3A Buck Regulator
Datasheetpdf iconMICROCHIP LM2576-3.3WT
In-Stock: 100
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QtyUnit PriceTotal Amount
1+$ 3.4$ 3.40
10+$ 2.9084$ 29.08
50+$ 2.6187$ 130.94
100+$ 2.3242$ 232.42
500+$ 2.1875$ 1093.75
1,000+$ 2.1272$ 2127.20
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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℃~+85℃
Frequency - Switching52kHz
FunctionStep-down type
Number of Outputs1
FeaturesCycle-by-cycle current limiting;Overcurrent Protection
TopologyBuck
Output TypeFixed
Operating Voltage4V~40V
Switch tube (built-in/external)Built-in
Output Voltage3.3V
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-bycycle 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
  • Guaranteed 3A output current
  • Wide input voltage range: 4V to 40V
  • Wide output voltage range 1.23V to 37V
  • Requires only 4 external components
  • 52kHz fixed frequency internal oscillator
  • Low power standby mode typically <200μA
  • 80% efficiency (adjustable version typically >80%)
  • Uses readily available standard inductors
  • Thermal shutdown and current limit protection
  • 100% electrical thermal limit burn-in

Applications

AI Translation
  • Simple high-efficiency step-down (buck) regulator
  • Efficient pre-regulator for linear regulators
  • On-card switching regulators
  • Positive to negative converter (inverting Buck-Boost)
  • Isolated Flyback Converter using minimum number of external components
  • Negative Boost Converter