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

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

Datasheets

Title		Size	Date	Other Language
	LM2722 High Speed Synchronous/Asynchronous MOSFET Driver	285 Kbytes	26-Sep-11

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM2722MX/NOPB LM2722MX RoHS Status	SOIC NARROW	Not recommended for new designs (as of 13-Jun-05) Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$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

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM2722.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM2722 is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM2722MX/NOPB LM2722MX	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT 2722 M

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM2722.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM2722 is located at RoHS Status.

CAD Symbols and Models Download LM2722 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM2722MX	ABCD150	0	42680	0	0	6394000	1	1814314958

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.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM2722.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM2722 is located at RoHS Status.

Obsolete Versions

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