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LP38690

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1-A, 10-V, low-dropout voltage regulator

Data sheet
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1-A, 10-V, low-dropout voltage regulator

LP38690

ACTIVE
Data sheet Order now

Product details

Parameters

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

TO-252 (NDP) 3 40 mm² 7.3 x 6.58 WSON (NGG) 6 9 mm² 3 x 3 open-in-new Find other Linear regulators (LDO)

Features

  • 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)

Description

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)
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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
Application note A Topical Index of TI LDO Application Notes (Rev. F) Jun. 27, 2019
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

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
149
Description

80-V 10A Power Stage EVM - The LMG1205 half-bridge EVM board is a small, easy to use, power stage with an external PWM signal. The EVM is suitable for evaluating the performance of the LMG1205 driving a GaN half-bridge in many different DC-DC converter topologies. It can be used to estimate the (...)

Features
  • Input voltage operates up to 80V
  • Simple open loop design to evaluate performance of LMG1205 driving a GaN Half-Bridge
  • VDD supply generated from an onboard linear regulator
  • Single PWM  input on board for PWM signal with < 8ns dead time
  • Kelvin sense capability for input and output to measure efficiency
  • (...)
View details
EVALUATION BOARD Download
document-generic User guide
199
Description
80-V 10A Power Stage EVM - The LMG5200 EVM board is a small easy to use power stage with an external PWM signal. The EVM is suitable for evaluating the performance of LMG5200 power stage in many different DC-DC converter topologies. It can be used to estimate the performance of LMG5200 to measure (...)
Features
  • Input voltage operates up to 80V
  • Simple open loop design to evaluate performance of LMG5200
  • VCC supply generated on board from a loosely regulated supply
  • Single PWM  input on board for PWM signal with < 8ns dead time
  • Kelvin sense capability for input and output to measure efficiency
View details

Design tools & simulation

SIMULATION MODEL Download
SNVM578.ZIP (38 KB) - PSpice Model
SIMULATION MODEL Download
SNVM579.ZIP (38 KB) - PSpice Model
SIMULATION MODEL Download
SNVM580.ZIP (38 KB) - PSpice Model
SIMULATION MODEL Download
SNVM581.ZIP (38 KB) - PSpice Model
SIMULATION MODEL Download
SNVMA96.ZIP (1 KB) - PSpice Model
SIMULATION MODEL Download
SNVMA97.ZIP (1 KB) - PSpice Model
SIMULATION MODEL Download
SNVMA98.ZIP (1 KB) - PSpice Model
SIMULATION MODEL Download
SNVMA99.ZIP (1 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
Self-Booting Audio System
TIDA-00609 — The purpose of this TI Design is to provide the designer hardware and software tools that can be used as reference for audio systems. The new revision of the PurePath™ Console Motherboard (RevF) adds stand-alone, self-booting capabilities to allow making compelling demos with any EVM that is (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
TO-252 (NDP) 3 View options
WSON (NGG) 6 View options

Ordering & quality

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

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

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