Inicio Gestión de la energía Convertidores de CA/CC y CC/CC (FET integrado)

LMR70503

ACTIVO

Regulador de voltaje Buck/Boost de salida negativa de 2,8 V a 5,5 V, 300 mA

Detalles del producto

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Inverting Type Converter Vin (min) (V) 2.8 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 1000 Features Enable Vout (min) (V) -5.5 Vout (max) (V) -0.9 Iq (typ) (µA) 300 Duty cycle (max) (%) 90 Switch current limit (typ) (A) 0.32
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Inverting Type Converter Vin (min) (V) 2.8 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 1000 Features Enable Vout (min) (V) -5.5 Vout (max) (V) -0.9 Iq (typ) (µA) 300 Duty cycle (max) (%) 90 Switch current limit (typ) (A) 0.32
DSBGA (YFX) 8 1.8 mm² 1.8 x 1
  • Tiny 8-Bump Thin DSBGA Package: 0.84 mm × 1.615 mm × 0.6 mm
  • 2.8 V to 5.5 V Input Voltage Range
  • Adjustable Output Voltage: -0.9 V to -5.5 V
  • 320 mA Switch Current Limit
  • 500 kHz Minimum Switching Frequency
  • Ground Referred Enable Input
  • Under Voltage Lock Out (UVLO)
  • No External Compensation
  • Internal Soft Start
  • 1 µA Shutdown Supply Current
  • Small Output Voltage Ripple
  • WEBENCH Enabled

Performance Benefits

  • Easy To Use
  • Tiny Overall Solution Size Reduces System Cost

SIMPLE SWITCHER is a trademark of Texas Instruments. WEBENCH is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

  • Tiny 8-Bump Thin DSBGA Package: 0.84 mm × 1.615 mm × 0.6 mm
  • 2.8 V to 5.5 V Input Voltage Range
  • Adjustable Output Voltage: -0.9 V to -5.5 V
  • 320 mA Switch Current Limit
  • 500 kHz Minimum Switching Frequency
  • Ground Referred Enable Input
  • Under Voltage Lock Out (UVLO)
  • No External Compensation
  • Internal Soft Start
  • 1 µA Shutdown Supply Current
  • Small Output Voltage Ripple
  • WEBENCH Enabled

Performance Benefits

  • Easy To Use
  • Tiny Overall Solution Size Reduces System Cost

SIMPLE SWITCHER is a trademark of Texas Instruments. WEBENCH is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

The LMR70503 is a buck-boost converter with adjustable negative output voltage in a tiny 8-bump thin DSBGA package. Its unique control method is designed to provide fast transient response, low output noise, high efficiency, and tight regulation in the smallest possible PCB area. The LMR70503 has built in soft start, peak current limit, minimum switching frequency, and Under Voltage Lock Out (UVLO), with no external compensation required. For ease of use, the Enable pin is referred to the IC ground, instead of the lowest potential of the IC: the negative output voltage.

The LMR70503 is a buck-boost converter with adjustable negative output voltage in a tiny 8-bump thin DSBGA package. Its unique control method is designed to provide fast transient response, low output noise, high efficiency, and tight regulation in the smallest possible PCB area. The LMR70503 has built in soft start, peak current limit, minimum switching frequency, and Under Voltage Lock Out (UVLO), with no external compensation required. For ease of use, the Enable pin is referred to the IC ground, instead of the lowest potential of the IC: the negative output voltage.

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Documentación técnica

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Tipo Título Fecha
* Data sheet LMR70503 Buck-Boost Converter For Negative Output Voltage in DSBGA datasheet (Rev. A) 04 abr 2013
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25 mar 2024
Application brief Buck-Boost Converters Solving Power Challenges in Optical Modules 13 may 2019
Application note Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 12 mar 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 jun 2018
EVM User's guide AN-2264 LMR70503 Demo Board (Rev. A) 25 abr 2013
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24 abr 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23 abr 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23 abr 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23 abr 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23 abr 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23 abr 2013
Application note Input and Output Capacitor Selection 19 sep 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) 03 may 2004

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

LMR70503EVM — Módulo de evaluación LMR70503

The LMR70503 is an inverting buck-boost converter with adjustable negative output voltage in a tiny 8-bump thin micro SMD package (0.84 mm × 1.615 mm × 0.6 mm). Its unique control method is designed to provide fast transient response, low outputnoise, high efficiency, and tight regulation in the (...)
Guía del usuario: PDF
Modelo de simulación

LMR70503 Unencrypted PSpice Transient Model

SNVM973.ZIP (3 KB) - PSpice Model
Modelo de simulación

LMR70503 Unencrypted PSpice Transient Model Package (Rev. A)

SNVM473A.ZIP (84 KB) - PSpice Model
Diseños de referencia

TIDA-00431 — Diseño de referencia ADC de 4 GSPS de muestreo RF con amplificador diferencial de acoplamiento de CC

Wideband radio frequency (RF) receivers allow greatly increased flexibility in radio designs. The wide instantaneous bandwidth allows flexible tuning without changing hardware and the ability to capture multiple channels at widely separated frequencies.

This reference design describes a wideband RF (...)

Design guide: PDF
Esquema: PDF
Diseños de referencia

TIDA-00826 — Diseño de referencia de extremo frontal del osciloscopio de 2 GHz de 50 ohmios

This reference design is part of an analog front-end for 50Ω-input oscilloscope application. System designers can readily use this evaluation platform to process input signals from DC to 2 GHz in both frequency-domain and time-domain applications.
Design guide: PDF
Esquema: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
DSBGA (YFX) 8 Ultra Librarian

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

Soporte y capacitación

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El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.

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