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 INDUCTOR • Programmable 725kHz, 300kHz, 37kHz, or 9.5kHz Switching Frequencies • 10-pin LLP No-Pullback Package: 3mm × 3mm × 0.8mm 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. LM2751 uses constant frequency pre-regulation to minimize conducted noise on the input and provide a predictable switching frequency. The switching frequency is programmable to 725kHz, 300kHz, 37kHz, or 9.5kHz. LM2751 is available in a 10-pin Leadless Leadframe No-Pullback Package: LLP-10. Applications • White LED Display Backlights • White LED Keypad Backlights • General Purpose 2×, 1.5× Regulated Charge Pump

LM2751   2.80 <= V in Lower  V   <= V in Upper  V   <= 5.50 V out 4.50 <=  V <= 5.00 I out    A <= 0.15 Ambient Temperature  °C <= 100 What are WEBENCH® tools? MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image	Block Diagram click for larger image
Typical Performance click for larger image

Datasheet

Title		Size	Date	Other Language
	LM2751 Regulated 2X, 1.5X Switched Capacitor White LED Driver	953 Kbytes	25-Apr-05

Featured Application Notes

Title		Size	Date	Other Language
	AN-1269: Application Note 1269 LM2750-5.0 Evaluation Board	233 Kbytes	2-Oct-03
	AN-1302: Application Note 1302 LM2750-ADJ Evaluation Board	194 Kbytes	26-Mar-04

More Application Notes

Title		Size	Date	Other Language
	AN-1269: Application Note 1269 LM2750-5.0 Evaluation Board	233 Kbytes	2-Oct-03
	AN-1302: Application Note 1302 LM2750-ADJ Evaluation Board	194 Kbytes	26-Mar-04
	AN-1777: Application Note 1777 Designing Energy-Efficient Handheld Illumination Solutions	156 Kbytes	27-Feb-08	中文
	AN-1998: Application Note 1998 How to Meet the HDMI 5V Source Requirement	117 Kbytes	28-Aug-09
	AN-1546: Application Note 1546 LM2754 Evaluation Board	927 Kbytes	3-Nov-06	中文
	AN-1778: Application Note 1778 LM2755 Charge Pump LED Controller with I2C Compatible Interface in µSMD	4110 Kbytes	30-Apr-08
	AN-1779: Application Note 1779 LM2756 Multi-Display Inductorless LED Driver with 32 Exponential Dimming Steps in µSMD	2288 Kbytes	31-Mar-08
	AN-1695: Application Note 1695 LM2758 Flash LED Driver Evaluation Board	347 Kbytes	9-Apr-08
	AN-1731: Application Note 1731 LM2757 Evaluation Board	573 Kbytes	19-Feb-08

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM2751SD-A	CMOS7	0	18406	0	0	1089000	4	309006723
LM2751SD-B	CMOS7	0	18406	0	0	1089000	4	309006723
LM2751SDX-A	CMOS7	0	18406	0	0	1089000	4	309006723
LM2751SDX-B	CMOS7	0	18406	0	0	1089000	4	309006723

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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