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LP38691

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500-mA, 10-V, low-dropout voltage regulator

Data sheet
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500-mA, 10-V, low-dropout voltage regulator

LP38691

ACTIVE
Data sheet Order now

Product details

Parameters

Output options Fixed Output Iout (Max) (A) 0.5 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 Approx. price (US$) 0.50 | 1ku Load capacitance (Min) (µF) 1 Rating Catalog Regulated outputs (#) 1 Features Foldback Overcurrent Protection Accuracy (%) 4 PSRR @ 100 KHz (dB) 50 Dropout voltage (Vdo) (Typ) (mV) 250 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)
  • All WSON Options are Available as AEC-Q100 Grade 1
  • 2% Output Accuracy (25°C)
  • Low Dropout Voltage: 250 mV at 500 mA (Typical,
    5 V Out)
  • Precision (Trimmed) Bandgap Reference
  • Ensured Specifications for –40°C to 125°C
  • 1-µA Off-State Quiescent Current
  • Thermal Overload Protection
  • Foldback Current Limiting
  • Ground Pin Current: 55 µA (typical) at full load
  • Enable Pin (LP38693)
 open-in-new Find other Linear regulators (LDO)

Description

The LP3869x low-dropout CMOS linear regulators provide tight output tolerance (2% typical), extremely low dropout voltage (250 mV at 500-mA load current, VOUT = 5 V), and excellent AC performance using ultralow equivalent series resistance (ESR) ceramic output capacitors.

The low thermal resistance of the WSON, SOT-223, and TO-252 packages allow use of the full operating current 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, thus 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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TPS7A90 ACTIVE 500-mA, low-noise, high-PSRR, adjustable ultra-low-dropout voltage regulator with high-accuracy This is a lower noise (4.7uVrms), 500-mA LDO regulator

Technical documentation

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Type Title Date
* Datasheet LP3869x/-Q1 500-mA Low-Dropout CMOS Linear Regulators Stable With Ceramic Output Capacitors datasheet (Rev. O) Dec. 02, 2015
Technical articles LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical articles LDO Basics: Preventing reverse current Jul. 25, 2018
Technical articles LDO basics: introduction to quiescent current Jun. 20, 2018
Selection guides Low Dropout Regulators Quick Reference Guide (Rev. P) Mar. 21, 2018
Technical articles 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.

Design tools & simulation

SIMULATION MODELS Download
SNVM582.ZIP (38 KB) - PSpice Model
SIMULATION MODELS Download
SNVMA74.ZIP (1 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
Protected DC-bus input power and control power supply reference design for low-voltage servo drives
TIDA-010070 — This reference design uses an ORing controller, the LM5050-1 to provide protection against reverse polarity and reverse current. In conjunction, the LM5069 hot swap controller is used for overcurrent, over voltage, under voltage protection, and inrush current limitation. The design also features (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
48V 3-Phase Inverter with Shunt-based In-line Motor Phase Current Sensing Reference Design
TIDA-00913 — The TIDA-00913 reference design realizes a 48V/10A 3-phase GaN inverter with precision in-line shunt-based phase current sensing for accurate control of precision drives such as servo drives. One of the largest challenges with in-line shunt-based phase current sensing is the high common-mode voltage (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Isolated IGBT Gate Driver Evaluation Platform for 3-Phase Inverter System Reference Design
TIDA-00195 — The TIDA-00195 reference design consists of a 22kW power stage with TI’s new reinforced isolated IGBT gate driver ISO5852S intended for motor control in various applications. This design allows performance evaluation of the ISO5852S in 3-phase inverter incorporating 1200V rated IGBT modules of (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
48V/10A High Frequency PWM 3-Phase GaN Inverter Reference Design for High-Speed Drives
TIDA-00909 — Low voltage, high-speed drives and/or low inductance brushless motors require higher inverter switching frequencies in the range of 40 kHz to 100 kHz to minimize losses and torque ripple in the motor. The TIDA-00909 reference design achieves that by using a 3-phase inverter with three 80V/10A (...)
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

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Training series

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Videos

Low-dropout linear voltage regulators (LDOs)

Looking for a new LDO? Get an overview of our newly released devices, including key specifications and unique features. Find the right product for you!

Posted: 01-Jan-2019
Duration: 19:11

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