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LP3966ES-ADJ 参数 Datasheet PDF下载

LP3966ES-ADJ图片预览
型号: LP3966ES-ADJ
PDF下载: 下载PDF文件 查看货源
内容描述: 3A快速超低压降线性稳压器 [3A Fast Ultra Low Dropout Linear Regulators]
分类和应用: 稳压器
文件页数/大小: 15 页 / 243 K
品牌: NSC [ NATIONAL SEMICONDUCTOR ]
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LP3963/LP3966 3A Fast Ultra Low Dropout Linear Regulators
April 2000
LP3963/LP3966
3A Fast Ultra Low Dropout Linear Regulators
General Description
The LP3963/LP3966 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 fast to step
changes in load which makes them suitable for low voltage
microprocessor applications. The LP3963/LP3966 are de-
veloped on a CMOS process which allows low quiescent
current operation independent of output load current.This
CMOS process also allows the LP3963/LP3966 to operate
under extremely low dropout conditions.
Dropout Voltage:
Ultra low dropout voltage; typically 80mV
at 300mA load current and 800mV at 3A load current.
Ground Pin Current:
Typically 6mA at 3A load current.
Shutdown Mode:
Typically 15µA quiescent current when
the shutdown pin is pulled low.
Error Flag:
Error flag goes low when the output voltage
drops 10% below nominal value (for LP3963).
SENSE:
Sense pin improves regulation at remote loads.
(For LP3966)
Precision Output Voltage:
Multiple output voltage options
are available ranging from 1.2V to 5.0V and adjustable, with
a guaranteed accuracy of
±
1.5% at room temperature, and
±
3.0% over all conditions ( varying line, load, and tempera-
ture).
Features
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Ultra low dropout voltage
Low ground pin current
Load regulation of 0.06%
15µA quiescent current in shutdown mode
Guaranteed output current of 3A DC
Available in TO-263 and TO-220 packages
Output voltage accuracy
±
1.5%
Error flag indicates output status (LP3963)
Sense option improves better load regulation (LP3966)
Extremely low output capacitor requirements
Overtemperature/overcurrent protection
−40˚C to +125˚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
DS101267-1
#
Minimum output capacitance is 10 µF to ensure stability over full load current range. More capacitance provides superior dynamic performance and additional
stability margin.
*SD and ERROR pins must be pulled high through a 10kΩ pull-up resistor. Connect the ERROR pin to ground if this function is not used. See applications sec-
tion for more information.
© 2000 National Semiconductor Corporation
DS101267
www.national.com