LMH6321_07 Datasheet, PDF (1/22 Pages) National Semiconductor (TI) – 300mA High Speed Buffer with Adjustable Current Limit

April 2007
LMH6321
300 mA High Speed Buffer with Adjustable Current Limit
General 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 cur-
rent limit is continuously adjustable from 10 mA to 300 ma
with a ±5 mA ±5% accuracy. The current limit is set by ad-
justing 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.
Features
■ ^{High slew rate}
■ ^{Wide bandwidth}
■ ^{Continuous output current}
■ ^{Output current limit tolerance}
■ ^{Wide supply voltage range}
■ ^{Wide temperature range}
■ ^{Adjustable current limit}
■ ^{High capacitive load drive}
■ ^{Thermal shutdown error flag}
Applications
■ ^{Line driver}
■ ^{Pin driver}
■ ^{Sonar driver}
■ ^{Motor control}
1800 V/μs
110 MHz
±300 mA
±5 mA ±5%
5V to ±15V
−40°C to +125°C
Connection Diagrams
8-Pin PSOP
7-Pin TO-263
20138625
Note: V^− pin is connected to tab on back of each package
20138626
© 2007 National Semiconductor Corporation 201386
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