Features High slew rate 1800 V/μs Wide bandwidth 110 MHz Continuous output current ±300 mA Output current limit tolerance ±5 mA ±5% Wide supply voltage range 5V to ±15V Wide temperature range −40°C to +125°C Adjustable current limit High capacitive load drive Thermal shutdown error flag Description The LMH6321 is a high speed unity gain buffer that slews at 1800 V/µs and has a small signal bandwidth of 110 MHz while driving a 50Ω load. It can drive ±300 mA continuously and will not oscillate while driving large capacitive loads. The LMH6321 features an adjustable current limit. The current limit is continuously adjustable from 10 mA to 300 ma with a ±5 mA ±5% accuracy. The current limit is set by adjusting an external reference current with a resistor. The current can be easily and instantly adjusted, as needed by connecting the resistor to a DAC to form the reference current. The sourcing and sinking currents share the same current limit. The LMH6321 is available in a space saving 8-pin PSOP or a 7-pin TO-263 power package. The PSOP package features an exposed pad on the bottom of the package to increase its heat sinking capability. The LMH6321 can be used within the feedback loop of an operational amplifier to boost the current output or as a stand alone buffer. Applications • Line driver • Pin driver • Sonar driver • Motor control

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Typical Application *click for larger image	Connection Diagram click for larger image
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Datasheets

Title		Size	Date	Other Language
	LMH6321 300 mA High Speed Buffer with Adjustable Current Limit	590 Kbytes	10-Apr-07	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1461: Application Note 1461 LMH6321 (PSOP and TO-263) Single Open Loop High Speed Buffer Evaluation Boards	6341 Kbytes	27-Nov-06	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LMH6321MR/NOPB LMH6321MR RoHS Status	PSOP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 190 DIGIKEY Worldwide 876 FARNELL Europe and Asia 5 FUTURE Worldwide 70 NEWARK Americas 155 RS COMPONENTS Worldwide 39	$2.25 each at 1K+ pcs	rail of 95
LMH6321MRX/NOPB LMH6321MRX RoHS Status	PSOP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$2.25 each at 1K+ pcs	reel of 2500
LMH6321TS/NOPB LMH6321TS RoHS Status	TO-263	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 135 DIGIKEY Worldwide 73 FARNELL Europe and Asia 338 NEWARK Americas 39	$2.25 each at 1K+ pcs	rail of 45
LMH6321TSX/NOPB LMH6321TSX RoHS Status	TO-263	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$2.25 each at 1K+ pcs	reel of 500

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

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

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

Part Number(s) (NSID)	Top View	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LMH6321MR/NOPB LMH6321MR		PSOP	8	3 3	260 260	Detail	Download	LMH6321.MOD	NSXYTT LMH63 21MR
LMH6321MRX/NOPB LMH6321MRX		PSOP	8	3 3	260 260	Detail	Download	LMH6321.MOD	NSXYTT LMH63 21MR
LMH6321TS/NOPB LMH6321TS		TO-263	7	3 3	245 235	Detail	Download	LMH6321.MOD	NSUZXYTTE# LMH6321TS
LMH6321TSX/NOPB LMH6321TSX		TO-263	7	3 3	245 235	Detail	Download	LMH6321.MOD	NSUZXYTTE# LMH6321TS

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

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

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

CAD Symbols and Models Download LMH6321 CAD Symbols

Models LMH6321.MOD

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LMH6321MR	VIP III	0	15575	0	0	1212500	3	344050185
LMH6321MRX	VIP III	0	15575	0	0	1212500	3	344050185
LMH6321TS	VIP III	0	15575	0	0	1212500	3	344050185
LMH6321TSX	VIP III	0	15575	0	0	1212500	3	344050185

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/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

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