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TPS51285B

ACTIVO

Controlador reductor síncrono doble de 5 V a 24 V con corriente quiescente ultrabaja

Detalles del producto

Rating Catalog Topology Buck Iout (max) (A) 20 Vin (max) (V) 24 Vin (min) (V) 5 Vout (max) (V) 5.5 Vout (min) (V) 4.5 Control mode D-CAP Features Enable, Light-load efficiency, Power good, Synchronous rectification Duty cycle (max) (%) 100 Iq (typ) (A) 0.000084 Number of phases 1 Operating temperature range (°C) -40 to 85
Rating Catalog Topology Buck Iout (max) (A) 20 Vin (max) (V) 24 Vin (min) (V) 5 Vout (max) (V) 5.5 Vout (min) (V) 4.5 Control mode D-CAP Features Enable, Light-load efficiency, Power good, Synchronous rectification Duty cycle (max) (%) 100 Iq (typ) (A) 0.000084 Number of phases 1 Operating temperature range (°C) -40 to 85
WQFN (RUK) 20 9 mm² (3 mm × 3 mm)
  • Input Voltage Range: 5 V to 24 V
  • Output Voltages: 5 V and 3.3 V
    (Adjustable Range ±10%)
  • Built-in, 100-mA, 5-V and 3.3-V
    LDOs
  • Clock Output for Charge-Pump
  • ±1% Reference Accuracy
  • Adaptive On-Time D-CAP Mode Control
    Architecture with 400 kHz (CH1) and
    475 kHz (CH2) Frequency
  • Auto-skip and ULQ modes for long
    battery life in system stand-by mode
  • Internal 0.8-ms Voltage Servo Soft-Start
  • Low-Side RDS(on) Current Sensing Scheme
  • Built-In Output Discharge Function
  • Separate Enable Input for Switchers
  • Dedicated OC Setting Terminals
  • Power Good Indicator
  • OVP, UVP and OCP Protection
  • Non-Latch UVLO and OTP Protection
  • 20-Pin, 3 mm × 3 mm, QFN (RUK)
  • Input Voltage Range: 5 V to 24 V
  • Output Voltages: 5 V and 3.3 V
    (Adjustable Range ±10%)
  • Built-in, 100-mA, 5-V and 3.3-V
    LDOs
  • Clock Output for Charge-Pump
  • ±1% Reference Accuracy
  • Adaptive On-Time D-CAP Mode Control
    Architecture with 400 kHz (CH1) and
    475 kHz (CH2) Frequency
  • Auto-skip and ULQ modes for long
    battery life in system stand-by mode
  • Internal 0.8-ms Voltage Servo Soft-Start
  • Low-Side RDS(on) Current Sensing Scheme
  • Built-In Output Discharge Function
  • Separate Enable Input for Switchers
  • Dedicated OC Setting Terminals
  • Power Good Indicator
  • OVP, UVP and OCP Protection
  • Non-Latch UVLO and OTP Protection
  • 20-Pin, 3 mm × 3 mm, QFN (RUK)

The TPS51285A and TPS51285B are cost-effective, dual synchronous buck controllers with 5-V and 3.3-V LDOs, targeted for notebook system-power supply solutions. The device achieves low power consumption by the use of auto-skip and ULQ™ modes, which is beneficial for long battery life in system stand-by mode. The 256-kHz VCLK output is provided to drive an external charge pump, generating gate drive voltage for the load switches with minimum power consumption in the main converter. The device employs adaptive on-time D-CAP™ mode control which enables fast load transient response without external compensation network. The TPS51285A/B operates with supply input voltage ranging from 5V to 24V and supports output voltages of 5 V and 3.3 V. The TPS51285A and TPS51285B are available in a 20-pin 3 x 3 (mm) QFN package and is specified from –40°C to 85°C.

The TPS51285A and TPS51285B are cost-effective, dual synchronous buck controllers with 5-V and 3.3-V LDOs, targeted for notebook system-power supply solutions. The device achieves low power consumption by the use of auto-skip and ULQ™ modes, which is beneficial for long battery life in system stand-by mode. The 256-kHz VCLK output is provided to drive an external charge pump, generating gate drive voltage for the load switches with minimum power consumption in the main converter. The device employs adaptive on-time D-CAP™ mode control which enables fast load transient response without external compensation network. The TPS51285A/B operates with supply input voltage ranging from 5V to 24V and supports output voltages of 5 V and 3.3 V. The TPS51285A and TPS51285B are available in a 20-pin 3 x 3 (mm) QFN package and is specified from –40°C to 85°C.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos Ultra-Low Quiescent (ULQ) Dual Synchronous Step-Down Controller with 5V/ 3.3V datasheet 12/04/2013
Nota sobre la aplicación Mosfet Driver Circuit Design Guide for TPS512xx (Rev. A) 1/04/2019

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.

Modelo de simulación

TPS51285B Unencrypted PSpice Transient Model Package (Rev. A)

SLVM846A.ZIP (87 KB) - Modelo PSpice
Productos y hardware compatibles
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
WQFN (RUK) 20 Ultra Librarian

Pedidos y calidad

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