LMH6321 300 mA 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/碌s and has a small signal bandwidth of 110 MHz while
driving a 50鈩?load. It can drive 鹵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 鹵5 mA 鹵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
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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
1800 V/渭s
110 MHz
鹵300 mA
鹵5 mA 鹵5%
5V to 鹵15V
鈭?0擄C to +125擄C
Applications
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Line driver
Pin driver
Sonar driver
Motor control
Connection Diagrams
8-Pin PSOP
7-Pin TO-263
20138626
20138625
Note:
V
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pin is connected to tab on back of each package
漏 2007 National Semiconductor Corporation
201386
www.national.com
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