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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