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LM2751 - Capacitor White LED Driver

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 low-cost ceramic capacitors.

Features

  • 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 < 1µA Typical Shutdown Current Small Solution Size - NO.

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LM2751 Regulated 2X, 1.5X Switched Capacitor White LED Driver April 2005 LM2751 Regulated 2X, 1.5X Switched Capacitor White LED Driver www.datasheet4u.com 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 low-cost ceramic capacitors. The LM2751 provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2 or 2. The proper gain for maintaining regulation is chosen so that efficiency is maximized over the input voltage range.
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