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LM2751 Datasheet White LED Driver

Manufacturer: Texas Instruments

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General Description

The LM2751 is a constant frequency switched capacitor charge pump with regulated output voltage options of 4.5V, and 5.0V.

Over the input voltage range of 2.8V to 5.5V the LM2751 provides up to 150mA of output current and requires only four lowcost ceramic capacitors.

Typical Application Circuit VIN = 2.8V - 5.5V 3 CIN 2.2 µF 2 C1 1 µF VIN C1+ 9 C110 C2+ C2 1 µF 7 C2- VOUT 1 VOUT = 4.5V, or 5.0V 2.2 µF LM2751 EN CS0 CS1 GND 6 4 5 8 COUT D1 R Capacitors: 1 µF - TDK C1608X7R1A105K 2.2 µF - TDK C2012X5R1A225K LM2751 2x/1.5x Efficiency vs.

Overview

LM2751 www.ti.com SNVS299B – APRIL 2005 – REVISED MAY 2013 LM2751 Regulated 2X, 1.

Key Features

  • 1.
  • 2 Regulated Output Options: 4.5V, 5.0V.
  • Output Voltage Regulated Within 3%.
  • Peak Efficiency Over 90%.
  • 150mA (4.5V) or 80mA (5.0V) Output Current Capability.
  • Input Voltage Range: 2.8V to 5.5V.
  • Low Input and Output Voltage Ripple.

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National Semiconductor Logo LM2751 Capacitor White LED Driver National Semiconductor

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