1 Features

• 4.5V to 28V input voltage range

• 0.6V to 13V output voltage range

• Supports 8A continuous output current

• Integrated 20.4mΩ and 9.5mΩ MOSFETs

• 0.6V ±1 reference voltage at 25°C

• 45uA low quiescent current of TPS56837

• D-CAP3™ control mode for fast transient response

• TPS56837 with Eco-mode (auto-skip mode) for

high light-load efficiency

• TPS56838 with forced continuous conduction

mode (FCCM)

• TPS56836 with Out-of-Audio™ (OOA) mode

• 500kHz, 800kHz, and 1200kHz selectable

switching frequencies by mode selection

• Adjustable cycle-by-cycle over current limit for lowside

MOSFETs by mode selection

• Adjustable soft-start time with default 1.8ms

• 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

• Create a customer design using the TPS5683x

with the WEBENCH® Power Designer

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

TPS56837H

2 Applications

• 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 TPS5683x 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

0.6V and 13V.

The TPS5683x 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 TPS56837 operates at Eco-mode to attain high

efficiency at light load. The TPS56838 operates in

forced continuous conduction mode which maintains

lower output ripple during all load conditions. The

TPS56836 operates in Out-of-Audio mode to avoid

audible noise.

The TPS5683x has three selectable switching

frequencies, 500kHz, 800kHz, and 1200kHz,

and selectable current limit through MODE pin

configuration. The TPS5683x has adjustable soft-start

time by connecting the SS capacitor and with default

1.8ms with the SS pin floating.

The TPS5683x 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 TPS5683x 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.