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Details, datasheet, quote on part number:LP3964-3.3
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| Part: | LP3964-3.3 |
| Category: | Power Management => Regulators => Linear Voltage Regulators => LDO (Low Drop Out) => Positive Voltage->Adjustable |
| Description: | LP3964 - 800mA Fast Ultra Low Dropout Linear Regulator, Package: SOT-223, Pin Nb=5 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LP3964-3.3 datasheet File size : 546 kB |
| Request For quote: | Find where to buy LP3964-3.3
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Datasheet text preview:
LP3961/LP3964 800mA Fast Ultra Low Dropout Linear Regulators
May 2003
LP3961/LP3964 800mA Fast Ultra Low Dropout Linear Regulators
General Description
The LP3961/LP3964 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 LP3961/LP3964 are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3961/LP3964 to operate under extremely low dropout conditions. Dropout Voltage: Ultra low dropout voltage; typically 24mV at 80mA load current and 240mV at 800mA load current. Ground Pin Current: Typically 4mA at 800mA 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 LP3961). SENSE: Sense pin improves regulation at remote loads. (For LP3964) Precision Output Voltage: Multiple output voltage options are available ranging from 1.2V to 5.0V and adjustable (LP3964), 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 0.02% 15µA quiescent current in shutdown mode Guaranteed output current of 0.8A DC Available in SOT-223,TO-263 and TO-220 packages Output voltage accuracy ± 1.5% Error flag indicates output status (LP3961) Sense option improves better load regulation (LP3964) Extremely low 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
10112901
*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
DS101129
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LP3961/LP3964
Typical Application Circuits
(Continued)
10112902
*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 LP3961
10112903
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LP3961/LP3964
Block Diagram LP3964
10112929
Block Diagram LP3964-ADJ
10112930
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