TPS51117RGYR

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TPS51117RGYR Application Field and Working Principle

The TPS51117RGYR is a Step-Down (or Switching) DC to DC Converter Controller manufactured by Texas Instruments (TI). It is part of TI’s portfolio of Polyphase PMICs (Power Management Integrated Circuits), and belongs to the Voltage Regulators – DC DC Switching Controllers family. This device is specifically designed to supply high-current loads with a regulated voltage, in an efficient and economically viable way.

Features

Its features are many and include:

• Integrated high-side and low-side MOSFET.
• 7V to 25V DC operating input voltage range.
• Output voltage adjustable from 0.9V to 0.9 x VIN.
• Supports up to 4 phase configurations.
• Programmable PWM period.
• Automatic temperature compensated current limit.
• Soft start and slew rate control.
• 16-bit I2C interface for programming.
• Overheating, output short, overvoltage and undervoltage protection.
• Available in a 48-pin 6.1mm x 6.1mm TSSOP package.

The TPS51117RGYR can be used in a wide range of applications, from data center components cooling to automotive headlamp illumination, thanks to its multiple power management capabilities. Additionally, its internal circuitry simplifies the end user’s hardware design, taking the burden off its system designs.

Working Principle

The TPS51117RGYR is a voltage regulator that converts a DC input voltage (Vin) provided to its input pin to a regulated DC output voltage through pulse-width modulation (PWM) applied by its internal power MOSFETs.

The TPS51117RGYR charges an output capacitor through an internal high-side MOSFET controlled by its PHASE pin. The falling edge of the PHASE pin triggers the current discharge through an integrated low-side MOSFET and the output capacitor then follows. This cycle of the charging and discharging the capacitor results in a PWM, which varies in voltage and frequency depending on the input and output of the device.

The integrated internal circuitry (undervoltage, overvoltage, overtemperature and load overcurrent protection) ensures that the output is correctly regulated at all times, and independent of environmental conditions, as well as any external influences.

Conclusion

The TPS51117RGYR is a high-performance, flexible and easy to use power converter controller that is suitable for a wide array of applications. Its internal circuitry ensures a perfectly regulated output voltage, regardless of the input conditions or influence of external factors. Amazingly, all these features are packed in a modest 48-pin 6.1mm x 6.1mm TSSOP package.

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