TPS56837H中文资料德州仪器数据手册PDF规格书

1 Features

• Support for USB power delivery (USB PD)

– 4.5V to 28V input voltage range

– 4V to 22V output voltage range

– Supports 8A continuous output current

– Three adjustable cycle-by-cycle over current

limit for low-side MOSFET by mode selection

• High efficiency over entire load range

– Integrated 20.4mΩ and 9.5mΩ MOSFETs

– 45uA low quiescent current

– Fixed 500kHz switching frequency

– 98.7 efficiency at VIN = 24V, VOUT = 20V and

IOUT = 3A

– Eco-mode for high light-load efficiency

• 0.6V ±1 reference voltage at 25°C

• D-CAP3™ control mode for fast transient response

• Adjustable soft-start time by SS capacitor

• Built-in output discharge function

• Power-good indicator to monitor output voltage

• Supports up to 98 duty operation

• Non-latched protections for UV, OV, OT, and UVLO

• –40°C to +150°C operating junction temperature

• Small 10-pin 3.0mm × 3.0mm HotRod™QFN

Package

• Pin-to-pin compatible with 6A TPS56637 and 8A

TPS56837

2 Applications

• USB Power Supplies with PD

• Industrial PC, EPOS, factory automation and

control

• Multifunction printers, video conference system

• Monitors, TV, speakers, PC and notebooks,

portable electronics

• General purposes for 12V,19V, 24V power-bus

supply

3 Description

The TPS56837H is a high-efficiency, easy-to-use,

synchronous buck converter with a wide input voltage

range of 4.5V to 28V. The device supports up to 8A

continuous output current at output voltages between

4V and 22V, and supports 5V, 9V, 15V, 20V dynamic

output change for USB Power Delivery (USB PD)

application.

The TPS56837H uses D-CAP3 control mode to

provide fast transient response, good line and load

regulation, no requirement for external compensation,

and supports low equivalent series resistance (ESR)

output capacitors like MLCC.

The TPS56837H operates at Eco-mode to attain

high efficiency at light load with fixed 500kHz

switching frequency and three selectable current limit

through MODE pin configuration. The TPS56837H

has adjustable soft-start time by the SS pin capacitor

configuration.

The TPS56837H provides complete non-latched OV

(overvoltage), UV (undervoltage), OC (overcurrent),

OT (overtemperature), and UVLO (undervoltage

lockout) protections combined with power-good

indicator and output discharge function features.

The TPS56837H is available in a 10-pin, 3.0mm

× 3.0mm, HotRod QFN package, and the junction

temperature is specified from –40°C to 150°C.