LP3855 1.5A Fast Response Ultra Low Dropout Linear Regulators | TI.com


1.5A Fast Response Ultra Low Dropout Linear Regulators

1.5A Fast Response Ultra Low Dropout Linear Regulators - LP3855


The LP3852 and LP3855 series of fast ultra-low dropout linear regulators operate from a 2.5-V to 7-V input supply. A 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 LP3852 and LP3855 are developed on a CMOS process which allows low quiescent-current operation independent of output load current, typically 4 mA at 1.5-A load current. This CMOS process also allows the LP3852 and LP3855 to operate under extremely low dropout conditions, typically 24 mV at 150-mA load current and 240 mV at 1.5-A load current.

The LP3852 has an ERROR pin; it goes low when the output voltage drops 10% below nominal value. The LP3855 has a SENSE pin to improves regulation at remote loads.

The LP3852 and LP3855 are available with fixed output voltages from 1.8 V to 5 V with a specified accuracy of ±1.5% at room temperature, and ±3% over all conditions (varying line, load, and temperature). Contact Texas Instruments Sales for specific voltage option needs.


  • Input Supply Voltage: 2.5 V to 7 V
  • Ultra-Low Dropout Voltage
  • Stable with Selected Ceramic Capacitors
  • Low Ground-Pin Current
  • Load Regulation of 0.06%
  • 10-nA Quiescent Current in Shutdown Mode
  • Specified Output Current of 1.5 A DC
  • Output Voltage Accuracy ± 1.5%
  • ERROR Pin Indicates Output Status
  • SENSE Option Improves Load Regulation
  • Overtemperature/Overcurrent Protection
  • −40°C to 125°C Junction Temperature Range

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Parametrics Compare all products in Single Channel LDO

Iout (Max) (A)
Output Options
Vin (Min) (V)
Vin (Max) (V)
Fixed Output Options (V)
Vout (Min) (V)
Vout (Max) (V)
Iq (Typ) (mA)
Vdo (Typ) (mV)
Accuracy (%)
Noise (uVrms)
Output Capacitor Type
Operating Temperature Range (C)
LP3855 LP3855-ADJ
1.5     1.5    
Fixed Output     Adjustable Output    
2.5     2.5    
7     7    
1.8     1.23    
5     6.6    
4     4    
240     240    
2     2    
100     100    
Ceramic     Ceramic    
Catalog     Catalog    
-40 to 125     -40 to 125