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Introduction, characteristics, and applications of Texas Instruments TPS568236 synchronous buck converter

2/19/2024 9:15:34 AM

Summary: Monolithic, 8A output current, buck converter with adaptive on-time D-CAP3 control mode.

TPS568236 Texas Instruments

The Texas Instruments TPS568236 synchronous buck converter is an integrated monolithic synchronous buck converter with adaptive real-time D-CAP3 control mode. The converter offers an integrated low R(DS(on)) power MOSFET, providing high efficiency and ease of use with minimal external component count for space-constrained power systems. The D-CAP3 control mode allows low external component count, ease of design, and optimizes power supply design for cost, size, and efficiency. The TPS568236 buck converter features an accurate voltage reference, fast load transient response, auto-skip mode and forced PWM mode for light load efficiency. This buck converter includes OVP, UVP, OCP, OTP, UVLO and adjustable soft-start. The TPS568236 buck converter consists of an internal fixed soft-start of 1ms. For longer soft-start times, this can be achieved using the external SS pin by connecting an external capacitor. The buck converter operates from an input voltage range (V(IN)) of 4.5V to 18V and an output voltage range from 0.6V to 5.5V. The TPS568236 is available in a thermally enhanced 12-pin QFN package with a junction temperature range of -40°C to 125°C.


characteristic

  • 4.5V to 18V input voltage range

  • Output voltage range 0.6V to 5.5V

  • Integrated 22 milliohm and 11 milliohm mosfets

  • Support 8A continuous I(OUT)

  • 84μA low quiescent current

  • ±1% reference voltage (0.6V), 25°C

  • ±1.5% reference voltage (0.6V), -40℃~ 125℃

  • 600kHz switching frequency

  • D-CAP3 control mode, fast transient response

  • Supports POSCAP and all MLCC output capacitors

  • Output discharge function

  • Adjustable soft start

  • PSM and FCCM can be selected under light load

  • Power - Good indicator light, monitors output voltage

  • Automatic recovery of output OV and UV protection

  • Non-latching UVLO and OT protection

  • Cycle-by-cycle overcurrent protection

  • Built-in output discharge function

  • Small 2mm x 3mm HotRod QFN package


app

  • TVs, set-top boxes and points of load (POL)

  • Servers, storage and network load points

  • Industrial PCs and factory automation equipment

  • Distributed power systems have typical 5V, 12V and 15V inputs


efficiency curve



Typical application diagram



Functional block diagram


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