Features: Ultra low dropout voltage
Low ground pin current
Load regulation of 0.02%
15A 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 to +125 junction temperature rangeApplicationMicroprocessor 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 applicationsPinout
SpecificationsStorage Temperature Range ...................................................-65 to +150
Lead Temperature(Soldering, 5 sec.) ......................................................260
ESD Rating (Note 3) 2 kV
Power Dissipation (Note 2)................................................... Internally Limited
Input Supply Voltage (Survival)................................................. -0.3V to +7.5V
Shutdown Input Voltage (Survival)..................................... -0.3V to VIN +0.3V
Output Voltage (Survival), (Note6), (Note 7)............................. -0.3V to +7.5V
IOUT (Survival) Short Circuit Protected
Maximum Voltage for ERROR Pin .......................................................VIN +0.3V
Maximum Voltage for SENSE Pin .....................................................VOUT+0.3V
| Output Current |
800 mA |
| Output Min |
1.8, 2.5, 3.3, 1.215 Volt |
| Input Min Voltage |
2.5 Volt |
| Input Max Voltage |
7 Volt |
| Dropout Voltage |
0.24 Volt |
| Adjustable Output |
No, Yes |
| Quiescent Current |
3 mA |
| On/Off Pin |
Yes |
| Error Flag |
No |
| RegType |
LDO |
| Temperature Min |
-40 deg C |
| Temperature Max |
125 deg C |
| Output Voltage |
1.8, 2.5, 3.3 Volt |
| Output Max |
1.8, 2.5, 3.3, 5 Volt |
| View Using Catalog |
DescriptionThe 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. Theseultra 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 de- veloped 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 of LP3964: Ultra low dropout voltage; typically 24mV at 80mA load current and 240mV at 800mA load current. Ground Pin Current: Typically 4mAat 800mAload current. Shutdown Mode: Typically 15A quiescent current when the shutdown pin is pulled low.
Error Flag of LP3964: 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, with a guaranteed accuracy of ±1.5% at room temperature, and ±3.0% over all conditions ( varying line, load, and tempera- ture).
LP3964 Data Sheet
