Product details


Output options Fixed Output Iout (Max) (A) 1 Vin (Max) (V) 10 Vin (Min) (V) 2.7 Vout (Max) (V) 5 Vout (Min) (V) 1.8 Fixed output options (V) 1.8, 2.5, 3.3, 5 Noise (uVrms) 80 Iq (Typ) (mA) 0.055 Thermal resistance θJA (°C/W) 51 Load capacitance (Min) (µF) 1 Rating Catalog Regulated outputs (#) 1 Features Enable, Foldback Overcurrent Protection Accuracy (%) 2.5 PSRR @ 100 KHz (dB) 50 Dropout voltage (Vdo) (Typ) (mV) 450 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

SOT-223 (NDC) 5 45 mm² 6.5 x 6.96 WSON (NGG) 6 9 mm² 3 x 3 open-in-new Find other Linear regulators (LDO)


  • Wide Input Voltage Range (2.7 V to 10 V)
  • 2.5% Output Accuracy (25°C)
  • Low Dropout Voltage: 450 mV at 1 A
    (typical, 5 VOUT)
  • Precision (Trimmed) Bandgap Reference
  • Ensured Specifications for –40°C to 125°C
  • 1-µA Off-State Quiescent Current
  • Thermal Overload Protection
  • Foldback Current Limiting
  • 3-Lead TO-252, 5-Lead SOT-223, and 6-Bump WSON Packages
  • Enable Pin (LP38692)
  • Ground Pin Current: 55 µA (typical) at Full Load
  • Precision Output Voltage: 2.5% (25°C) Accuracy
open-in-new Find other Linear regulators (LDO)


The LP38690 and LP38692 low-dropout CMOS linear regulators provide tight output tolerance (2.5% typical), extremely low dropout voltage (450 mV at a 1-A load current, VOUT = 5 V), and excellent AC performance utilizing ultra low ESR ceramic output capacitors.

The low thermal resistance of the WSON, SOT-223, and TO-252 packages allow the full operating current to be used even in high ambient temperature environments.

The use of a PMOS power transistor means that no DC base drive current is required to bias it allowing ground pin current to remain below 100 µA regardless of load current, input voltage, or operating temperature.

For all available packages, see the orderable addendum at the end of the data sheet.
open-in-new Find other Linear regulators (LDO)

Technical documentation

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Type Title Date
* Datasheet LP38690, LP38692 1-A Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors datasheet (Rev. M) Dec. 03, 2015
Technical article LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical article LDO Basics: Preventing reverse current Jul. 25, 2018
Technical article LDO basics: introduction to quiescent current Jun. 20, 2018
Selection guide Low Dropout Regulators Quick Reference Guide (Rev. P) Mar. 21, 2018
Technical article LDO basics: noise – part 1 Jun. 14, 2017
User guide AN-1424 LP38692-ADJ Evaluation Board (Rev. C) Dec. 11, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

LP38692-Adj 1A Low Dropout CMOS Linear Regulators with Adjustable Output

  • Output voltage range of 1.25V - 9V
  • 2.5% adjustable pin voltage accuracy (25°C)
  • Low dropout voltage: 450mV @ 1A (typ. 5V out)
  • Wide input voltage range (2.7V to 10V)
  • Precision (trimmed) bandgap reference
  • Guaranteed specs for -40°C to +125°C
  • 1mA off-state quiescent current
  • Thermal overload protection
  • Foldback (...)

Design tools & simulation

SNVM599.ZIP (38 KB) - PSpice Model
SNVMAA1.ZIP (1 KB) - PSpice Model

Reference designs

Low Cost, Small Solution Size Power Management Reference Design for CC3200 SimpleLink Wi-Fi
TIDA-00534 The TIDA-00534 reference design provides guideline and test data of a cost effective small size power solution to power the main 3.3V voltage rails of the CC3200 wireless MCU or any other noise sensitive system from a 5V voltage source.
document-generic Schematic document-generic User guide
Power Solution for Terasic DE2-115 (Cyclone IV)
PMP10581 The PMP10581 reference design provides all the power supply rails necessary to power Altera’s Cyclone® IV E FPGA. DE2-115 was developed by Terasic and this board is available for purchase through Terasic’s website.
document-generic Schematic document-generic User guide
Design files

CAD/CAE symbols

Package Pins Download
SOT-223 (NDC) 5 View options
WSON (NGG) 6 View options

Ordering & quality

Information included:
  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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Support & training

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