LP38798 (ACTIVE)

800-mA Ultra-Low-Noise, High-PSRR LDO

 

Recommended alternative parts

  • TPS7A47  -  TPS7A47 is a single-channel, low-noise, high voltage, 1-A LDO
  • TPS7A33  -  TPS7A33 is a negative voltage (–36 V), ultralow-noise (16-µVRMS), 1A LDO

Description

The LP38798-ADJ is a high-performance, low-noise LDO that can supply up to 800 mA output current. Designed to meet the requirements of sensitive RF/Analog circuitry, the LP38798-ADJ implements a novel linear topology on an advanced CMOS process to deliver ultra-low output noise and high PSRR at switching power supply frequencies. The LP38798SD-ADJ is stable with both ceramic and tantalum output capacitors and requires a minimum output capacitance of only 1 µF for stability.

The LP38798-ADJ can operate over a wide input voltage range (3 V to 20 V) making it well suited for many post-regulation applications.

For all available packages, see the orderable addendum at the end of the data sheet.

Features

  • Wide Operating Input Voltage Range:
    3 V to 20 V
  • Ultra-Low Output Noise: 5 µVRMS
    (10 Hz to 100 kHz)
  • High PSRR: 90 dB at 10 kHz, 60 dB at 100 kHz
  • ±1% Output Voltage Initial Accuracy (TJ = 25°C)
  • Very Low Dropout: 200 mV (Typical) at 800 mA
  • Stable with Ceramic or Tantalum Output Capacitors
  • Excellent Line and Load Transient Response
  • Current Limit and Overtemperature Protection
  • Create a Custom Design Using the LP38798 With the WEBENCH Power Designer

View more

Parametrics Compare all products in Single Channel LDO

 
Iout (Max) (A)
Output Options
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iq (Typ) (mA)
Vdo (Typ) (mV)
Accuracy (%)
Noise (uVrms)
PSRR @ 100KHz (dB)
Output Capacitor Type
Rating
Operating Temperature Range (C)
Pin/Package
LP38798
0.8   
Adjustable Output   
3   
20   
1.2   
19.8   
1.4   
200   
2   
5   
65   
Ceramic
Non-Ceramic   
Catalog   
-40 to 125   
12WSON   
New! Interactive Design
Click to instantly view a schematic, charts, Bill of Materials, and Operating Values.

WEBENCH® Designer LP38798

  Min   Max Range
Vin  V 3.0 to 20.0V
Vout  V 1.2 to 19.65V
Iout  A ≤ 0.8A
Ambient Temp  °C -40 to 125°C


Footprint BOM Cost Efficiency


Preview design