Inicio Gestión de la energía Reguladores lineales y de baja salida (LDO)

LM317

ACTIVO

Regulador de tensión lineal ajustable de 1.5 A y 40 V

Detalles del producto

Output options Adjustable Output Iout (max) (A) 1.5 Vin (max) (V) 40 Vin (min) (V) 3 Vout (max) (V) 37 Vout (min) (V) 1.25 Noise (µVrms) 38 Iq (typ) (mA) 5 Thermal resistance θJA (°C/W) 24 Rating Catalog Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Accuracy (%) 5 PSRR at 100 KHz (dB) 38 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) 0 to 125
Output options Adjustable Output Iout (max) (A) 1.5 Vin (max) (V) 40 Vin (min) (V) 3 Vout (max) (V) 37 Vout (min) (V) 1.25 Noise (µVrms) 38 Iq (typ) (mA) 5 Thermal resistance θJA (°C/W) 24 Rating Catalog Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Accuracy (%) 5 PSRR at 100 KHz (dB) 38 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) 0 to 125
SOT-223 (DCY) 4 45.5 mm² 6.5 x 7 TO-220 (KCS) 3 46.228 mm² 10.16 x 4.55 TO-263 (KTT) 3 154.8384 mm² 10.16 x 15.24
  • Output voltage range adjustable
    from 1.25 V to 37 V
  • Output current greater than 1.5 A
  • Internal short-circuit current limiting
  • Thermal overload protection
  • Output safe-area compensation
  • Output voltage range adjustable
    from 1.25 V to 37 V
  • Output current greater than 1.5 A
  • Internal short-circuit current limiting
  • Thermal overload protection
  • Output safe-area compensation

The LM317 device is an adjustable three-terminal positive-voltage regulator capable of supplying more than 1.5 A over an output-voltage range of 1.25 V to 37 V. It requires only two external resistors to set the output voltage. The device features a typical line regulation of 0.01% and typical load regulation of 0.1%. It includes current limiting, thermal overload protection, and safe operating area protection. Overload protection remains functional even if the ADJUST terminal is disconnected.

The LM317 device is an adjustable three-terminal positive-voltage regulator capable of supplying more than 1.5 A over an output-voltage range of 1.25 V to 37 V. It requires only two external resistors to set the output voltage. The device features a typical line regulation of 0.01% and typical load regulation of 0.1%. It includes current limiting, thermal overload protection, and safe operating area protection. Overload protection remains functional even if the ADJUST terminal is disconnected.

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Documentación técnica

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Tipo Título Fecha
* Data sheet LM317 3-Terminal Adjustable Regulator datasheet (Rev. Y) PDF | HTML 29 abr 2020
Application note LDO Noise Demystified (Rev. B) PDF | HTML 18 ago 2020
Application note A Topical Index of TI LDO Application Notes (Rev. F) 27 jun 2019
Application note Accurate Thermal Calculations on the Back of a Napkin 03 jun 2019
Application note Fundamental Theory of PMOS LDO Voltage Regulators (Rev. A) 17 ago 2018
Selection guide Low Dropout Regulators Quick Reference Guide (Rev. P) 21 mar 2018
Application note LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 09 ago 2017
Technical article Designing an IoT modular light PDF | HTML 17 jun 2016
Technical article How to create power solutions: solar power PDF | HTML 19 ene 2016
Application note A Topical Index of TI Supply Voltage Supervisor (SVS) Application Notes 15 jun 2015
Application note Linear power for automated industrial systems 09 ene 2015
Analog Design Journal Techniques for accurate PSRR measurements 28 oct 2013
Application note AB-12 Wide Adjustable Range PNP Voltage Regulator (Rev. B) 06 may 2013
Application note AN-1028 Maximum Power Enhancement Techniques for Power Packages (Rev. B) 06 may 2013
Application note AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B) 06 may 2013
Application note AN-42 IC Provides On-Card Regulation for Logic Circuits (Rev. B) 06 may 2013
Application note AN-178 Applications for an Adjustable IC Power Regulator (Rev. B) 05 may 2013
Application note AN-182 Improving Power Supply Reliability with IC Power Regulators (Rev. B) 05 may 2013
Application note Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) 05 may 2013
Application note AN-1482 LDO Regulator Stability Using Ceramic Output Capacitors (Rev. A) 25 abr 2013
Application note AN-1061 Power Conversion in Line-Powered Equipment (Rev. B) 23 abr 2013
Application note High-Efficiency Reg has Low Drop-Out Voltage (Rev. B) 23 abr 2013
Application note AN-1950 Silently Powering Low Noise Applications (Rev. A) 22 abr 2013
Application note LDO Performance Near Dropout 08 oct 2010
Application note Linear and Switching Voltage Regulator Fundamental Part 1 21 mar 2007
Application note A New Production Technique for Trimming Voltage Regulators 03 oct 2002
Application note Adjustable 3-Terminal Regulator for Low-Cost Battery Charging Systems 03 oct 2002
Application note High Stability Regulators 03 oct 2002

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

LM317A-337N-EVM — Módulo de evaluación de regulador ajustable de 3 pines

The LM317A-337N-EVM demonstrates canonical application of the LM317A adjustable regulator and its negative complement, the LM337-N. The evaluation module (EVM) is assesmbled with the SOT-223 package option for each device, supplying up to 1 A of load current. The EVM is designed for easy (...)

Guía del usuario: PDF
Modelo de simulación

LM317 PSpice Transient Model

SBVM440.ZIP (34 KB) - PSpice Model
Modelo de simulación

LM317 TINA-TI Transient Model

SBVM441.ZIP (8 KB) - TINA-TI Spice Model
Modelo de simulación

LM317 TINA-TI Transient Reference Design

SBVM442.TSC (606 KB) - TINA-TI Reference Design
Modelo de simulación

LM317 Unencrypted PSpice Transient Model

SLVMC40.ZIP (1 KB) - PSpice Model
Diseños de referencia

TIDM-SOLARUINV — Microinversor solar vinculado a la red con MPPT

This design is a digitally-controlled, grid-tied, solar micro inverter with maximum power point tracking (MPPT). Solar micro inverters are an emerging segment of the solar power industry. Rather than linking every solar panel in an installation to a central inverter, solar micro inverter-based (...)
Guía del usuario: PDF
Esquema: PDF
Diseños de referencia

PMP20396 — Diseño de referencia de fuente de alimentación de polarización de 400 V de entrada y 50 W de salida

PMP20396 is a multiple-output isolated bias supply reference design. With 100V or above input voltage, this design can provide maximum 2W output power. With 300V or above input voltage, this design can provide maximum 50W output power. Four different outputs are provided in this design - 5V/500mA (...)
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP8930 — Diseño de referencia de retorno regulado por el lado primario con entrada CA de 85 V a 265 V y almac

The PMP8930 reference design uses the UCC28710 primary-side regulated flyback controller to generate a 20V output from a univeral AC input. a bulk capacitor with slow-charge-fast-discharge circuit is placed at flyback output to provide long hold up time for the following step-down DC-DC stages. (...)
Test report: PDF
Paquete Pasadores Descargar
SOT-223 (DCY) 4 Ver opciones
TO-220 (KCS) 3 Ver opciones
TO-263 (KTT) 3 Ver opciones

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

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