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TPS40345

ACTIVO

Controlador reductor síncrono de 3 V a 20 V, 25 A para aplicaciones de costo optimizado

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TPS40345

ACTIVO
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Detalles del producto

Rating Catalog Topology Buck Iout (max) (A) 25 Vin (max) (V) 20 Vin (min) (V) 3 Vout (max) (V) 18 Vout (min) (V) 0.6 Control mode Voltage mode Features Enable, Power good, Prebias startup, Spread Spectrum, Synchronous rectification EMI & noise features Spread Spectrum Duty cycle (max) (%) 90 Iq (typ) (A) 0.0025 Number of phases 1 Operating temperature range (°C) -20 to 85
Rating Catalog Topology Buck Iout (max) (A) 25 Vin (max) (V) 20 Vin (min) (V) 3 Vout (max) (V) 18 Vout (min) (V) 0.6 Control mode Voltage mode Features Enable, Power good, Prebias startup, Spread Spectrum, Synchronous rectification EMI & noise features Spread Spectrum Duty cycle (max) (%) 90 Iq (typ) (A) 0.0025 Number of phases 1 Operating temperature range (°C) -20 to 85
VSON (DRC) 10 9 mm² (3 mm × 3 mm)
  • Input Voltage Range From 3 V to 20 V
  • 600-kHz Switching Frequency
  • High- and Low-Side FET RDS(on) Current Sensing
  • Programmable Thermally Compensated OCP Levels
  • Programmable Soft-Start
  • 600-mV, 1.3% Reference Voltage
  • Voltage Feed-Forward Compensation
  • Supports Prebiased Output
  • Frequency Spread Spectrum
  • Thermal Shutdown Protection at 145°C
  • 10-Pin 3-mm × 3-mm VSON Package With Ground Connection to Thermal Pad
  • Input Voltage Range From 3 V to 20 V
  • 600-kHz Switching Frequency
  • High- and Low-Side FET RDS(on) Current Sensing
  • Programmable Thermally Compensated OCP Levels
  • Programmable Soft-Start
  • 600-mV, 1.3% Reference Voltage
  • Voltage Feed-Forward Compensation
  • Supports Prebiased Output
  • Frequency Spread Spectrum
  • Thermal Shutdown Protection at 145°C
  • 10-Pin 3-mm × 3-mm VSON Package With Ground Connection to Thermal Pad

The TPS40345 is a synchronous buck controller that operates from 3-V to 20-V input and which can be used in cost-optimized applications. The controller implements a voltage-mode control architecture with input-voltage feed-forward compensation that responds instantly to a change in input voltage. The switching frequency is fixed at 600 kHz.

The frequency spread spectrum (FSS) feature adds to the switching frequency, significantly reducing the peak EMI noise and making it much easier to comply with EMI standards.

The TPS40345 offers design with a variety of user-programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation.

OCP level may be programmed by a single external resistor connected from the LDRV pin to circuit ground. During initial power on, the TPS40345 enters a calibration cycle, measures the voltage at the LDRV pin, and sets an internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop across the low-side FET when it is on to determine whether there is an overcurrent condition. The TPS40345 then enters a shutdown and restart cycle until the fault is removed.

The TPS40345 is a synchronous buck controller that operates from 3-V to 20-V input and which can be used in cost-optimized applications. The controller implements a voltage-mode control architecture with input-voltage feed-forward compensation that responds instantly to a change in input voltage. The switching frequency is fixed at 600 kHz.

The frequency spread spectrum (FSS) feature adds to the switching frequency, significantly reducing the peak EMI noise and making it much easier to comply with EMI standards.

The TPS40345 offers design with a variety of user-programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation.

OCP level may be programmed by a single external resistor connected from the LDRV pin to circuit ground. During initial power on, the TPS40345 enters a calibration cycle, measures the voltage at the LDRV pin, and sets an internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop across the low-side FET when it is on to determine whether there is an overcurrent condition. The TPS40345 then enters a shutdown and restart cycle until the fault is removed.
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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 TPS40345 3-V to 20-V Input Synchronous Buck Controller datasheet PDF | HTML 7/12/2017
Analog Design Journal Maximizing power density and thermal performance in power-module designs 12/12/2018

Diseño y desarrollo

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Placa de evaluación

TPS40345EVM-353 — Módulo de evaluación de controlador reductor síncrono de entrada de 8 V a 14 V y salida de 1.2 V TPS

El módulo de evaluación (EVM) TPS40345EVM-353 es un convertidor buck sincrónico que proporciona una salida 1.2 V fija a un máximo de 20 A desde un bus de entrada de 12 V.
Guía del usuario: PDF | HTML
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Modelo de simulación

TPS40345 PSpice Transient Model

SLUM612.ZIP (85 KB) - Modelo PSpice
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Modelo de simulación

TPS40345 Unencrypted PSpice Transient Model

SLUM611.ZIP (9 KB) - Modelo PSpice
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VSON (DRC) 10 Ultra Librarian
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