LP3878-ADJ Micropower 800mA Low Noise 'Ceramic Stable' Adjustable Voltage Regulator for 1V to 5V App. | TI.com

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Micropower 800mA Low Noise 'Ceramic Stable' Adjustable Voltage Regulator for 1V to 5V App.


Recommended alternative parts

  • LP3879  -  Fixed Versions 1.0V And 1.2V
  • 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


The LP3878-ADJ is an 800-mA, adjustable output, voltage regulator designed to provide high performance and low noise in applications requiring output voltages as low as 1 V.

Using an optimized VIP (Vertically Integrated PNP) process, the LP3878-ADJ delivers superior performance:

  • Ground Pin Current: Typically 5.5 mA at 800-mA load, and 180 µA at 100-µA load.
  • Low Power Shutdown: The LP3878-ADJ draws less than 10-µA quiescent current when the SHUTDOWN pin is pulled low.
  • Precision Output: Ensured output voltage accuracy is 1% at room temperature.
  • Low Noise: Broadband output noise is only 18 µV (typical) with a 10-nF bypass capacitor.


  • Input Supply Voltage: 2.5 V to 16V
  • Output Voltage Range: 1 V to 5.5 V
  • Designed for Use With Low-ESR Ceramic
  • Very Low Output Noise
  • 8-Lead SO PowerPAD and WSON Surface-
    Mount Packages
  • < 10-µA Quiescent Current in Shutdown
  • Low Ground Pin Current at all Loads
  • Overtemperature and Overcurrent Protection
  • –40°C to 125°C Operating Junction Temperature

WEBENCH® Designer LP3878-ADJ

  Min   Max Range
Vin  V 2.5 to 16.0V
Product Option
Vout  V
Iout  A ≤ 0.8A
Ambient Temp  °C -40.0 to 125.0°C


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Part number Order Output options Iout (Max) (A) Vin (Max) (V) Vin (Min) (V) Vout (Max) (V) Vout (Min) (V) Package Group Features Regulated outputs (#) Operating temperature range (C) Thermal resistance θJA (°C/W) Noise (uVrms) Approx. price (US$) Rating PSRR @ 100 KHz (dB) Accuracy (%) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
LP3878-ADJ Order now Adjustable Output     0.8     16     2.5     5.5     1     SO PowerPAD | 8
WSON | 8    
Enable     1     -40 to 125     43     18     0.70 | 1ku     Catalog     35     3     475     5.5     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
8WSON: 16 mm2: 4 x 4 (WSON | 8)