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LP3855ET-5.0 Datasheet

  • LP3855ET-5.0

  • 1.5A Fast Response Ultra Low Dropout Linear Regulators

  • 19頁

  • NSC

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LP3852/LP3855 1.5A Fast Response Ultra Low Dropout Linear Regulators
March 2004
LP3852/LP3855
1.5A Fast Response Ultra Low Dropout Linear
Regulators
General Description
The LP3852/LP3855 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 LP3852/LP3855
are developed on a CMOS process which allows low quies-
cent current operation independent of output load current.
This CMOS process also allows the LP3852/LP3855 to op-
erate under extremely low dropout conditions.
Dropout Voltage:
Ultra low dropout voltage; typically 24mV
at 150mA load current and 240mV at 1.5A load current.
Ground Pin Current:
Typically 4mA at 1.5A 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 0.06%
10nA quiescent current in shutdown mode
Guaranteed output current of 1.5A DC
Available in TO-263, TO-220 and SOT-223 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
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
20031001
**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
DS200310
www.national.com

LP3855ET-5.0 產品屬性

  • National Semiconductor (TI)

  • 7 V

  • 5 V

  • 0.035 V at 150 mA, 0.28 V at 1.5A

  • 1.5 A

  • 0.06 %

  • 1

  • Fixed

  • + 125 C

  • Through Hole

  • TO-220

  • 0.02 %

  • - 40 C

  • Tube

  • 45

  • +/- 1.5 %

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