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Part: LP3963-3.3
Category:
Power Management
-> Regulators
-> Linear Voltage Regulators
-> LDO (Low Drop Out)
-> Positive Voltage->Fixed
Description: LP3963 - 3A Fast Ultra Low Dropout Linear Regulator, Package: to 263, Pin Nb=5
Company: National Semiconductor Corporation
Datasheet: Download LP3963-3.3 datasheet File size : 1121 kB
Request For quote: Find where to buy LP3963-3.3
Datasheet text preview:
LP3963/LP3966 3A Fast Ultra Low Dropout Linear Regulators
May 2003
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 quickly to step changes in load which makes them suitable for low voltage microprocessor applications. The LP3963/LP3966 are developed 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 (LP3966), with a guaranteed accuracy of ± 1.5% at room temperature, and ± 3.0% over all conditions (varying line, load, and temperature).
Features
n n n n n n n n n n n n 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 load regulation (LP3966) Minimum output capacitor requirements Overtemperature/overcurrent protection -40°C to +125°C junction temperature range
Applications
n n n n n n n n 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
10126701
*SD and ERROR pins must be pulled high through a 10k pull-up resistor. Connect the ERROR pin to ground if this function is not used. See applications section for more information. ** See Application Hints
© 2003 National Semiconductor Corporation
DS101267
www.national.com
LP3963/LP3966
Typical Application Circuits
(Continued)
10126734
*SD and ERROR pins must be pulled high through a 10k pull-up resistor. Connect the ERROR pin to ground if this function is not used. See applications section for more information. ** See Application Hints
Block Diagram LP3963
10126703
www.national.com
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LP3963/LP3966
Block Diagram LP3966
10126729
Block Diagram LP3966-ADJ
10126735
Connection Diagrams
10126705
10126706
Top View TO220-5 Package Bent, Staggered Leads
Top View TO263-5 Package
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