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Linear & low-dropout (LDO) regulators

LP38798

ACTIVE

800-mA, 20-V, low-noise, high-PSRR, adjustable low-dropout voltage regulator with enable

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Data sheet

LP38798

ACTIVE
Data sheet Order now

Product details

Output options Adjustable Output Iout (max) (A) 0.8 Vin (max) (V) 20 Vin (min) (V) 3 Vout (max) (V) 19.8 Vout (min) (V) 1.2 Rating Catalog Noise (µVrms) 5 PSRR at 100 KHz (dB) 65 Iq (typ) (mA) 1.4 Thermal resistance θJA (°C/W) 35 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 200 Operating temperature range (°C) -40 to 125
Output options Adjustable Output Iout (max) (A) 0.8 Vin (max) (V) 20 Vin (min) (V) 3 Vout (max) (V) 19.8 Vout (min) (V) 1.2 Rating Catalog Noise (µVrms) 5 PSRR at 100 KHz (dB) 65 Iq (typ) (mA) 1.4 Thermal resistance θJA (°C/W) 35 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 200 Operating temperature range (°C) -40 to 125
WSON (DNT) 12 16 mm² 4 x 4
  • 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
  • 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

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.

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.

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Technical documentation

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Type Title Date
* Data sheet LP38798 800-mA Ultra-Low-Noise, High-PSRR LDO datasheet (Rev. F) PDF | HTML 24 Jan 2017
Application note A Topical Index of TI LDO Application Notes (Rev. F) 27 Jun 2019
Selection guide Low Dropout Regulators Quick Reference Guide (Rev. P) 21 Mar 2018
Technical article Decrease power consumption with an LDO PDF | HTML 19 Jul 2016
EVM User's guide LP38798EVM User's Guide 26 Mar 2013

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LP38798 PSpice Transient Model

SNOM471.ZIP (20 KB) - PSpice Model
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Simulation model

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