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Convertidores de CA/CC y CC/CC (FET integrado)
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TPS55285

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Convertidor buck-boost de 22 V y 8 A con interfaz de I²C

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TPS55285

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Detalles del producto

Rating Catalog Topology Buck-Boost Switch current limit (typ) (A) 8 Vin (max) (V) 22 Vin (min) (V) 2.4 Vout (max) (V) 15 Vout (min) (V) 0.8 Features Adjustable current limit, Dynamic voltage scaling, Enable, Frequency synchronization, I2C interface, Light-load efficiency, Load Disconnect, Output discharge, Spread Spectrum, Synchronous rectification, USB C/PD compatible, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Switching frequency (min) (kHz) 360 Switching frequency (max) (kHz) 2400 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 720 Duty cycle (max) (%) 100 Type Converter
Rating Catalog Topology Buck-Boost Switch current limit (typ) (A) 8 Vin (max) (V) 22 Vin (min) (V) 2.4 Vout (max) (V) 15 Vout (min) (V) 0.8 Features Adjustable current limit, Dynamic voltage scaling, Enable, Frequency synchronization, I2C interface, Light-load efficiency, Load Disconnect, Output discharge, Spread Spectrum, Synchronous rectification, USB C/PD compatible, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Switching frequency (min) (kHz) 360 Switching frequency (max) (kHz) 2400 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 720 Duty cycle (max) (%) 100 Type Converter
WQFN-HR (VAL) 15 8.75 mm² 3.5 x 2.5
  • Programmable power supply (PPS) support for USB power delivery (USB PD)
    • Wide input voltage range: 2.4V to 22V
    • 3.0V Minimum input voltage for start-up
    • Programmable output voltage range: 0.8V to 15V with 10mV step
    • ±1% reference voltage accuracy
    • Adjustable output voltage compensation for voltage drop over the cable
    • Programmable output current limit up to 6.35A with 50mA step
  • High efficiency over entire load range
    • 92.0% efficiency at VIN = 20V, VOUT = 5V and IOUT = 5A
    • 95.7% efficiency at VIN = 12V, VOUT = 15V and IOUT = 5A
  • I2C Programming
    • Output enable(OE) On/Off
    • Slew rate of output voltage change
    • Switching frequency: 400kHz, 800kHz, 1.6MHz, 2.1MHz
    • Programmable PFM and FPWM mode at light load
    • Spread spectrum enable/disable
    • Output discharge enable/disable
  • Rich protection features
    • Input overvoltage protection
    • Output relative overvoltage protection
    • Hiccup mode for output short-circuit protection
    • Thermal shutdown protection
    • 8A average inductor current limit
  • Small solution size
    • Four low RDS(ON) internal MOSFETs
    • Maximum switching frequency up to 2.1MHz
    • 2.5mm × 3.5mm HotRod™ WQFN package
  • Programmable power supply (PPS) support for USB power delivery (USB PD)
    • Wide input voltage range: 2.4V to 22V
    • 3.0V Minimum input voltage for start-up
    • Programmable output voltage range: 0.8V to 15V with 10mV step
    • ±1% reference voltage accuracy
    • Adjustable output voltage compensation for voltage drop over the cable
    • Programmable output current limit up to 6.35A with 50mA step
  • High efficiency over entire load range
    • 92.0% efficiency at VIN = 20V, VOUT = 5V and IOUT = 5A
    • 95.7% efficiency at VIN = 12V, VOUT = 15V and IOUT = 5A
  • I2C Programming
    • Output enable(OE) On/Off
    • Slew rate of output voltage change
    • Switching frequency: 400kHz, 800kHz, 1.6MHz, 2.1MHz
    • Programmable PFM and FPWM mode at light load
    • Spread spectrum enable/disable
    • Output discharge enable/disable
  • Rich protection features
    • Input overvoltage protection
    • Output relative overvoltage protection
    • Hiccup mode for output short-circuit protection
    • Thermal shutdown protection
    • 8A average inductor current limit
  • Small solution size
    • Four low RDS(ON) internal MOSFETs
    • Maximum switching frequency up to 2.1MHz
    • 2.5mm × 3.5mm HotRod™ WQFN package

The TPS55285 is a fully integrated synchronous buck-boost converter that is optimized for converting battery voltage, USB Power Delivery (USB PD) or adaptor voltage into power supply rails. The TPS55285 integrates four 15mΩ MOSFETs to provide a high efficiency and small size solution.

The TPS55285 has a wide input voltage range from 2.4V (3.0V rising) to 22V and is capable of outputting 0.8V to 15V voltage with 10mV step to support a variety of applications. The TPS55285 features 8A average inductor current limit and supplies up to 7A output current in buck mode. In boost mode, it is able to deliver 60W from 12V input or 30W from 5V input.

Through the I2C interface, the output voltage of the TPS55285 is programmed dynamically. The default output voltage is 5V when the device is enabled. The I2C interface allows for configuration of slew rate of the output voltage change, switching frequency, forced PWM mode operation.

The TPS55285 offers input and output overvoltage protection, average inductor current limit, cycle-by-cycle peak current limit and output short circuit protection. The TPS55285 also allows for safe operating with output current limit without external output current sense resistor and hiccup mode protection in sustained overload conditions.

The TPS55285 allows the use of small inductor and capacitor with high switching frequency. The TPS55285 is available in 2.5mm × 3.5mm QFN package.

The TPS55285 is a fully integrated synchronous buck-boost converter that is optimized for converting battery voltage, USB Power Delivery (USB PD) or adaptor voltage into power supply rails. The TPS55285 integrates four 15mΩ MOSFETs to provide a high efficiency and small size solution.

The TPS55285 has a wide input voltage range from 2.4V (3.0V rising) to 22V and is capable of outputting 0.8V to 15V voltage with 10mV step to support a variety of applications. The TPS55285 features 8A average inductor current limit and supplies up to 7A output current in buck mode. In boost mode, it is able to deliver 60W from 12V input or 30W from 5V input.

Through the I2C interface, the output voltage of the TPS55285 is programmed dynamically. The default output voltage is 5V when the device is enabled. The I2C interface allows for configuration of slew rate of the output voltage change, switching frequency, forced PWM mode operation.

The TPS55285 offers input and output overvoltage protection, average inductor current limit, cycle-by-cycle peak current limit and output short circuit protection. The TPS55285 also allows for safe operating with output current limit without external output current sense resistor and hiccup mode protection in sustained overload conditions.

The TPS55285 allows the use of small inductor and capacitor with high switching frequency. The TPS55285 is available in 2.5mm × 3.5mm QFN package.
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* Data sheet TPS55285 22V, 8A Buck-Boost Converter with I2 C Interface datasheet (Rev. A) PDF | HTML 09 oct 2025

Diseño y desarrollo

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Placa de evaluación

TPS55285EVM — Módulo de evaluación TPS55285

El módulo de evaluación (EVM) TPS55285EVM-053 está diseñado para demostrar las características y la funcionalidad del dispositivo TPS55285, que es un convertidor buck-boost sincrónico de alto rendimiento y alta eficiencia con interfaz I²C. El TPS55285 también verifica que haya un funcionamiento (...)

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Modelo de simulación

TPS55285 PSpice Transient Model

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