Features
| • | Standard output voltage: 1.00V, 1.20V |
| • | Custom voltages available from 1.0V to 1.2V (50 mV increments) |
| • | Input voltage: 2.5 to 6V |
| • | 1% initial output accuracy |
| • | Designed for use with low ESR ceramic capacitors |
| • | Very low output noise |
| • | Sense option improves load regulation |
| • | 8 Lead PSOP and LLP surface mount packages |
| • | <10 µA quiescent current in shutdown |
| • | Low ground pin current at all loads |
| • | High peak current capability |
| • | Over-temperature/over-current protection |
| • | -40°C to +125°C junction temperature range |
General Description
The LP3879 is a 800 mA fixed-output voltage regulator designed to provide high performance and low noise in applications requiring output voltages between 1.0V and 1.2V.
Using an optimized VIP™ (Vertically Integrated PNP) process, the LP3879 delivers superior performance:
Ground Pin Current: Typically 5.5 mA @ 800 mA load, and 200 µA @ 100 µA load.
Low Power Shutdown: The LP3879 draws less than 10 µA quiescent current when shutdown pin is pulled low.
Precision Output: Guaranteed output voltage accuracy is 1% at room temperature.
Low Noise: Broadband output noise is only 18 µV (typical) with 10 nF bypass capacitor.
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Applications
| • | ASIC Power Supplies In: - Desktops, Notebooks and Graphic Cards - Set Top Boxes, Printers and Copiers |
| • | DSP and FPGA Power Supplies |
| • | SMPS Post-Regulator |
| • | Medical Instrumentation |
| |
Typical Application
*click for larger image
| Parameters | Values |
|---|
| Output Current |
800 mA |
| Output Min |
1, 1.2 Volt |
| Input Min Voltage |
2.5 Volt |
| Input Max Voltage |
6 Volt |
| Dropout Voltage |
Undefined Volt |
| Adjustable Output |
No |
| Quiescent Current |
0.2 mA |
| PSRR |
60 dB |
| Voltage Noise (rms) |
18 uV |
| On/Off Pin |
Yes |
| Error Flag |
No |
| RegType |
LDO |
| Temperature Min |
-40 deg C |
| Temperature Max |
125 deg C |
| Output Voltage |
1, 1.2 Volt |
| Output Max |
1, 1.2 Volt |
Typical Performance
*click for larger image
| |
Also Recommended
| LP3878-ADJ▲ | Adjustable Voltage For 1V To 5V Applications |
| LP3881▲ | Vin Down To 1.3V, Vout Down To 1.2V |
| LP38841▲ | Vin Down To 1.05V, Vout Down To 0.56V |
| LP3891▲ | Vin Down To 1.6V, Vout Down To 1.2V |
Additional Resources
Application Notes
Block Diagram
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RoHS Compliance Information
