Features • Synchronous or Asynchronous Operation • Adaptive shoot-through protection • Input Under-Voltage-Lock-Out • Typical 20ns internal delay • Plastic 8-pin SO package Description The LM2722, part of the LM2726 family, is designed to be used with multi-phase controllers. This part differs from the LM2726 by changing the functionality of the SYNC_EN pin from a whole chip enable to a low side MOSFET enable. As a result, the SYNC_EN pin now provides control between Synchronous and Asynchronous operations. Having this control can be advantageous in portable systems since Asynchronous operations can be more efficient at very light loads. The LM2722 drives both top and bottom MOSFETs in a push-pull structure simultaneously. It takes a logic level PWM input and splits it into two complimentary signals with a typical 20ns dead time in between. The built-in cross-conduction protection circuitry prevents the top and bottom FETs from turning on simultaneously. The cross-conduction protection circuitry detects both the driver outputs and will not turn on a driver until the other driver output is low. With a bias voltage of 5V, the peak sourcing and sinking current for each driver of the LM2722 is typically 3A. In an SO-8 package, each driver is able to handle 50mA average current. Input UVLO (Under-Voltage-Lock-Out) forces both driver outputs low to ensure proper power-up and power-down operation. The gate drive bias voltage needed by the high side MOSFET is obtained through an external bootstrap. Minimum pulse width is as low as 55ns. Applications • Driver for LM2723 Intel Mobile Northwood CPU core power supply. • High Current DC/DC Power Supplies • High Input Voltage Switching Regulators • Fast Transient Microprocessors

Also Recommended LM5104 100V Max Vin LM27222 Recommended Replacement Part For New Designs MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

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

Datasheet

Title		Size	Date	Other Language
	LM2722 High Speed Synchronous/Asynchronous MOSFET Driver	162 Kbytes	19-Dec-01

Featured Application Notes

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Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM2722M/NOPB RoHS	SOIC NARROW	Lifetime buy Lead Time: 12 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$1.30 each at 1K+ pcs	rail of 95
LM2722MX/NOPB RoHS	SOIC NARROW	Not recommended for new designs (as of 13-Jun-05) Lead Time: 8 weeks	Contact your distributor	$1.30 each at 1K+ pcs	reel of 2500

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM2722M	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM2722M	ABCD150	0	34175	0	0	4234000	1	1201409060
LM2722MX	ABCD150	0	34175	0	0	4234000	1	1201409060

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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Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM2722M	NONE	NATIONAL SEMICONDUCTOR	01 Dec 2009