Features: Ultra low dropout voltage
Low ground pin current
Load regulation of 0.06%
15A 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
-40to +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
Specifications
| Output Current |
3000 mA |
| Output Min |
2.5, 3.3 Volt |
| Input Min Voltage |
2.5 Volt |
| Input Max Voltage |
7 Volt |
| Dropout Voltage |
0.8 Volt |
| Adjustable Output |
No |
| Quiescent Current |
5 mA |
| On/Off Pin |
Yes |
| Error Flag |
Yes |
| RegType |
LDO |
| Temperature Min |
-40 deg C |
| Temperature Max |
125 deg C |
| Output Voltage |
2.5, 3.3 Volt |
| Output Max |
2.5, 3.3 Volt |
| View Using Catalog |
Storage 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
DescriptionThe 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).
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LP3963ES-1.8 |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LP3963ES-2.5 |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LP3963ES-3.3 |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LP3963ES-5.0 |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LP3963ESX-1.8 |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LP3963ESX-2.5 |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LP3963ESX-3.3 |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LP3963ESX-5.0 |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LP3963ET-1.8 |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LP3963ET-2.5 |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LP3963ET-3.3 |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
| LP3963ET-5.0 |
CS065 |
2 |
34108 |
59 |
0 |
3862000 |
1 |
1095853045 |
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.For more information on Reliability Metrics, please click here.
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 of LP3963: 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 15A quiescent current when the shutdown pin is pulled low.
Error Flag of LP3963: 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).
LP3963 Data Sheet
