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

LP2951

ACTIVO

Regulador de voltaje de 100 mA, 30 V, de baja caída, con señal power good y habilitación

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LP2951

ACTIVO
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Detalles del producto

Output options Adjustable Output, Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 30 Vin (min) (V) 2 Vout (max) (V) 29 Vout (min) (V) 1.2 Fixed output options (V) 3, 3.3, 5 Rating Catalog Noise (µVrms) 160 PSRR at 100 KHz (dB) 57 Iq (typ) (mA) 0.075 Thermal resistance θJA (°C/W) 52, 97 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 3 Dropout voltage (Vdo) (typ) (mV) 380 Operating temperature range (°C) -40 to 125
Output options Adjustable Output, Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 30 Vin (min) (V) 2 Vout (max) (V) 29 Vout (min) (V) 1.2 Fixed output options (V) 3, 3.3, 5 Rating Catalog Noise (µVrms) 160 PSRR at 100 KHz (dB) 57 Iq (typ) (mA) 0.075 Thermal resistance θJA (°C/W) 52, 97 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 3 Dropout voltage (Vdo) (typ) (mV) 380 Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² 4.9 x 6 WSON (DRG) 8 9 mm² 3 x 3
  • Wide input voltage range
    • VIN range : 2V to 30V
  • Wide output voltage range VOUT
    • Fixed option: 3V (legacy Chip), 3.3V, 5.0V
    • Adjustable option: 1.2V to 29V
  • Output current: 100mA
  • VOUT accuracy:
    • ±2% over line, load, and temperature (legacy chip)
    • ±1% over line, load, and temperature (new chip)
  • Quiescent current IQ (new chip): 50µA (typical)
  • Low dropout (new chip):: 340mV (typical)
  • Output current limiting and thermal shutdown
  • Stable over a wide range of ceramic output capacitor values
    • COUT range: 1µF to 100µF (new chip)
    • ESR range: 0 to 2Ω (new chip)
  • Operating junction temperature: –40°C to 125°C
  • Package option:
    • LP (3-pin TO-92)
    • D (8-pin SOIC)
    • DRG (8-pin WSON)
  • Wide input voltage range
    • VIN range : 2V to 30V
  • Wide output voltage range VOUT
    • Fixed option: 3V (legacy Chip), 3.3V, 5.0V
    • Adjustable option: 1.2V to 29V
  • Output current: 100mA
  • VOUT accuracy:
    • ±2% over line, load, and temperature (legacy chip)
    • ±1% over line, load, and temperature (new chip)
  • Quiescent current IQ (new chip): 50µA (typical)
  • Low dropout (new chip):: 340mV (typical)
  • Output current limiting and thermal shutdown
  • Stable over a wide range of ceramic output capacitor values
    • COUT range: 1µF to 100µF (new chip)
    • ESR range: 0 to 2Ω (new chip)
  • Operating junction temperature: –40°C to 125°C
  • Package option:
    • LP (3-pin TO-92)
    • D (8-pin SOIC)
    • DRG (8-pin WSON)

The LP2951 is a wide input low-dropout regulator (LDO) supporting an input voltage range from 2V to 30V and can supply up to 100mA of load current. The LP2951 is able to output either a fixed or adjustable output from the same device. By tying the OUTPUT and SENSE pins together, and the FEEDBACK and VTAP pins together, the LP2951 gives 3.3V or 5V fixed output voltages. Alternatively, leave the SENSE and VTAP pins open and connect FEEDBACK to an external resistor divider. This configuration allows the output to be set to any value between 1.2V to 29V.

The LP2951-Q1 has a ERROR output that monitors the voltage at the feedback pin to indicate the status of the output voltage. The SHUTDOWN input and ERROR output are used for sequencing multiple power supplies in the system.

The LP2951 is a wide input low-dropout regulator (LDO) supporting an input voltage range from 2V to 30V and can supply up to 100mA of load current. The LP2951 is able to output either a fixed or adjustable output from the same device. By tying the OUTPUT and SENSE pins together, and the FEEDBACK and VTAP pins together, the LP2951 gives 3.3V or 5V fixed output voltages. Alternatively, leave the SENSE and VTAP pins open and connect FEEDBACK to an external resistor divider. This configuration allows the output to be set to any value between 1.2V to 29V.

The LP2951-Q1 has a ERROR output that monitors the voltage at the feedback pin to indicate the status of the output voltage. The SHUTDOWN input and ERROR output are used for sequencing multiple power supplies in the system.
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Documentación técnica

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Tipo Título Fecha
* Data sheet LP295x 100-mA, 30-V, adjustable voltage regulator with shutdown datasheet (Rev. K) PDF | HTML 13 dic 2024
Application note L1 and L2 EV Charger Electric Vehicle Service Equipment Design Considerations (Rev. B) 09 jun 2021
Application note LDO Noise Demystified (Rev. B) PDF | HTML 18 ago 2020
Application note ESR, Stability, and the LDO Regulator (Rev. A) 07 ene 2020
Application note A Topical Index of TI LDO Application Notes (Rev. F) 27 jun 2019
Application note Fundamental Theory of PMOS LDO Voltage Regulators (Rev. A) 17 ago 2018
EVM User's guide LP2951 EVM User's Guide (Rev. A) 05 ene 2018
Application note LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 09 ago 2017
Technical article How to use an LDO as a load switch PDF | HTML 01 feb 2016
Technical article Two ways LDOs save power in the IoT PDF | HTML 17 ago 2015
Technical article How to use an LDO to protect a power source PDF | HTML 25 jul 2015
Application note A Topical Index of TI Supply Voltage Supervisor (SVS) Application Notes 15 jun 2015
Analog Design Journal Techniques for accurate PSRR measurements 28 oct 2013
Application note AN-1028 Maximum Power Enhancement Techniques for Power Packages (Rev. B) 06 may 2013
Application note AN-1482 LDO Regulator Stability Using Ceramic Output Capacitors (Rev. A) 25 abr 2013
Application note AN-1815 LDOs Ease the Stress of Start-Up (Rev. A) 24 abr 2013
Application note AN-1061 Power Conversion in Line-Powered Equipment (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 3.6V – 5.5V Input, LDO Reference Design for MSP430 (Rev. A) 14 jun 2010
Application note 3.6V – 5.5V Input, LDO with Dual-Level Output Reference Design for MSP430 (Rev. A) 14 jun 2010
Application note Packaging Limits Range of Linear Regulators 08 may 2010
Application note Simple Power Solution Using LDOs for the DM365 (Rev. A) 11 sep 2009
Application note Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) 04 jun 2008
Application note Low-Voltage Current Loop Transmitter 02 ago 2007
Application note Battery Charging 21 mar 2007
Application note Linear and Switching Voltage Regulator Fundamental Part 1 21 mar 2007
Application note Ceramic Capacitors Replace Tantalum Capacitors in LDOs (Rev. A) 13 oct 2006
Application note Understanding LDO Dropout 09 may 2005
White paper Versatility of the LM5030 PWM Push-Pull Controller 01 dic 2003
Application note Extending the Input Voltage Range of an LDO Regulator 16 ago 2002
Application note Understanding the Terms and Definitions of LDO Voltage Regulators 21 oct 1999
Application note Technical Review of Low Dropout Voltage Regulator Operation And Performance 30 ago 1999
Application brief Low Power 150-mA LDO Linear Regulators. Extended Output Voltage Adjustment Range 11 jun 1999

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

LP2951EVM — Módulo de evaluación de reguladores de baja caída (LDO) fijos/ajustables de microalimentación LP2951

The LP2951 devices are bipolar low-dropout (LDO) voltage regulators that can accommodate a wide input supply-voltage range of up to 30 V with an output load up to 100 mA. The LP2951EVM allows for flexibility in design, allowing the user to add or remove input and output capacitors, as well as (...)
Guía del usuario: PDF
No disponible en TI.com
Modelo de simulación

LP2951 PSpice Transient Model (Rev. A)

SNVM037A.ZIP (23 KB) - PSpice Model
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Modelo de simulación

LP2951 Unencrypted PSpice Transient Model

SNVMAO3.ZIP (1 KB) - PSpice Model
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This reference design realizes a reinforced isolated three-phase inverter subsystem using isolated IGBT gate drivers and isolated current/voltage sensors. The UCC23513 gate driver used has a 6-pin wide body package with optical LED emulated inputs which enables its use as pin-to-pin replacement to (...)
Design guide: PDF
Esquema: PDF
Diseños de referencia

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Se trata de un diseño de referencia compacto de 30 V de CC y 400 W para aplicaciones de aviónica que funciona con una frecuencia de red de entre 400 Hz y 800 Hz. Para corregir el factor de potencia y minimizar el contenido armónico de la corriente de entrada se utiliza una corrección del factor de (...)
Test report: PDF
Diseños de referencia

TIDA-010076 — Diseño de referencia de alimentación y datos en cadena margarita a través de Ethernet de un solo par

The TIDA-010076 shows the transfer of 220-W power and 100-Mbit/s data over SPE. Communication systems in daisy-chain topology need significantly less hardware and wiring than conventional systems in star-topology. When combined with single-pair Ethernet (SPE, 100BASE-T1) and power over data line, (...)
Design guide: PDF
Esquema: PDF
Diseños de referencia

PMP21872 — Diseño de referencia buck sincrónico de 12 V, 1 salida de 40 A de formato pequeño

This reference design is a dual-phase synchronous buck solution using TPS53622 controller with two CSD95490Q5MC power-stage ICs. It takes a 12-V input and converts it to 1-V out at 40 A; 20 A per phase.
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP20852 — Diseño de referencia de convertidor Flyback de triple salida aislado de 3 W

PMP20852 is an isolated flyback converter reference design with primary-side regulation using the UCC2805 controller IC. There are three independently isolated outputs on the secondary side, each of which use LP2951 linear regulators to provide a well-regulated 16V output on each of the three (...)
Test report: PDF
Esquema: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
SOIC (D) 8 Ultra Librarian
WSON (DRG) 8 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

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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