LP38798 800-mA Ultra-Low-Noise, High-PSRR LDO | TI.com

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
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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

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Parametrics Compare all products in Linear regulators (LDO)

 
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
Output Capacitor Type
PSRR @ 100KHz (dB)
Accuracy (%)
Vdo (Typ) (mV)
Iq (Typ) (mA)
Package Size: mm2:W x L (PKG)
LP38798
Adjustable Output    
0.8    
20    
3    
19.8    
1.2    
WSON | 12    
Enable    
1    
-40 to 125    
35    
5    
1.30 | 1ku    
Catalog    
Ceramic
Non-Ceramic    
65    
2    
200    
1.4    
See datasheet (WSON)    

Design tool

New!
WEBENCH® Power Designer is now even easier to use. Try it now.

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


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