LMH6321 Datasheet, PDF (1/21 Pages) National Semiconductor (TI) – 300 mA High Speed Buffer with Adjustable Current Limit

October 2006
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
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 fea-
tures 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
n High slew rate
n Wide bandwidth
n Continuous output current
n Output current limit tolerance
n Wide supply voltage range
n Wide temperature range
n Adjustable current limit
n High capacitive load drive
n Thermal shutdown error flag
Applications
n Line driver
n Pin driver
n Sonar driver
n 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
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© 2006 National Semiconductor Corporation DS201386
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