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LP3853ET-5.0 Datasheet

  • LP3853ET-5.0

  • 3A Fast Response Ultra Low Dropout Linear Regulators

  • 18頁

  • NSC

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LP3853/LP3856 3A Fast Ultra Low Dropout Linear Regulators
March 2004
LP3853/LP3856
3A Fast Response Ultra Low Dropout Linear Regulators
General Description
The LP3853/LP3856 series of fast ultra low-dropout linear
regulators operate from a +2.5V to +7.0V input supply. Wide
range of preset output voltage options are available. These
ultra low dropout linear regulators respond very quickly to
step changes in load, which makes them suitable for low
voltage microprocessor applications. The LP3853/LP3856
are developed on a CMOS process which allows low quies-
cent current operation independent of output load current.
This CMOS process also allows the LP3853/LP3856 to op-
erate under extremely low dropout conditions.
Dropout Voltage:
Ultra low dropout voltage; typically 39mV
at 300mA load current and 390mV at 3A load current.
Ground Pin Current:
Typically 4mA at 3A load current.
Shutdown Mode:
Typically 10nA quiescent current when
the shutdown pin is pulled low.
Error Flag:
Error flag goes low when the output voltage
drops 10% below nominal value.
SENSE:
Sense pin improves regulation at remote loads.
Precision Output Voltage:
Multiple output voltage options
are available ranging from 1.8V to 5.0V with a guaranteed
accuracy of
鹵
1.5% at room temperature, and
鹵
3.0% over all
conditions (varying line, load, and temperature).
Features
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Ultra low dropout voltage
Stable with selected ceramic capacitors
Low ground pin current
Load regulation of 0.08%
10nA quiescent current in shutdown mode
Guaranteed output current of 3A DC
Available in TO-263 and TO-220 packages
Output voltage accuracy
鹵
1.5%
Error flag indicates output status
Sense option improves load regulation
Overtemperature/overcurrent protection
鈭?0藲C to +125藲C junction temperature range
Applications
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Microprocessor power supplies
Stable with ceramic output capacitors
GTL, GTL+, BTL, and SSTL bus terminators
Power supplies for DSPs
SCSI terminator
Post regulators
High efficiency linear regulators
Battery chargers
Other battery powered applications
Typical Application Circuits
20030901
**SD and ERROR pins must be pulled high through a 10k鈩?pull-up resistor. Connect the ERROR pin to ground if this function is not used. See Application Hints
for more information.
漏 2004 National Semiconductor Corporation
DS200309
www.national.com

LP3853ET-5.0 產(chǎn)品屬性

  • National Semiconductor (TI)

  • 7 V

  • 5 V

  • 0.05 V at 300 mA, 0.45 V at 3A

  • 3 A

  • 0.08 %

  • 1

  • Fixed

  • + 125 C

  • Through Hole

  • TO-220

  • 0.02 %

  • - 40 C

  • Tube

  • 45

  • +/- 1.5 %

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