Part Number: TPS54824RNVR

Manufacturer: Texas Instruments


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TPS54824RNVR Introduction

Texas Instruments TPS54824RNVR is a synchronous step-down converter with an 8A current and an input voltage range of 4.5V to 18V. (TI). This article will serve as a comprehensive resource for everything related to the TPS54824RNVR, from its features and uses to its advantages and technical specs.

TPS54824RNVR Description

The TPS54824 comes in a tiny 3.5 mm HotRodTM QFN package, but it’s a full-featured synchronous step-down DC/DC converter capable of outputting 17 V (19 V maximum). The high efficiency and combined high-side and low-side MOSFETs make this device ideal for compact solutions. By controlling the current at its peak, we can reduce the number of components needed, and by using a high switching frequency, we can shrink the size of the inductor, so saving even more room. Simpler loop correction and quicker transient response benefit the peak current mode control.

When overloaded, the device is protected by a current restriction on the source side and a peak current limit on the high side. If a MOSFET experiences an intermittent fault like a short circuit or overloading, the power dissipation can’t get too high. The output of the regulator is tracked by a power good supervisor circuit. When the output voltage is within specification, the PGOOD pin, an open-drain output, becomes high-impedance. The PGOOD pin will not pull low unless a fault has occurred, thanks to an included de glitch time. Using the designated EN pin, you can turn the regulator on and off and fine-tune the input undervoltage lockout. The SS/TRK pin regulates the output voltage ramp-up in solo or tracking modes of operation.

Detailed Description

The TPS54824 has two n-channel MOSFETs built and operates as a 17-V, 8-A synchronous step-down (buck) converter. The device utilizes a constant frequency peak current mode control to boost performance during line and load transients and to make external frequency compensation more straightforward. Because of the broad range of switching frequencies available, anywhere from 200 kHz to 1600 kHz, output filter components can be optimized for efficiency and compactness. The switching frequency can be modified by connecting a resistor to the ground on the RT/CLK pin. The TPS54824 contains a built-in phase lock loop (PLL) that can synchronize the switching cycle with the falling edge of an external system clock through the RT/CLK pin.

Thanks to the MOSFETs included in the design, high-efficiency power supply systems are now possible with continuous output currents of up to 8 amperes. For reduced-duty cycle applications, the MOSFETs have been sized for maximum efficiency. The gadget incorporates a bootstrap recharge circuit, which decreases the number of external components needed. For the high-side MOSFET, the bias voltage is provided by a capacitor linked to the BOOT and SW pins. To charge the BOOT capacitor, one can use a BOOT to SW UVLO (BOOT-SW UVLO) circuit, which monitors the voltage on the BOOT capacitor and allows the SW pin to be pulled low.

As long as the BOOT capacitor voltage exceeds the configured BOOT-SW UVLO threshold, typically 2.2 V, the device can function at a 100% duty cycle. TPS54824 is built for risk-free monotonic startup into pre-biased loads. When VIN is normally 4.1 V, the device will start up automatically. Using two external resistors and the EN pin’s inbuilt pull-up current source, the input voltage under voltage lockout (UVLO) can be fine-tuned. The gadget can still function with the EN pin floating thanks to the internal pull-up current of the EN pin. Current consumption by the TPS54824 with no load and no switching is typically 580 A. If the gadget is turned off, the supply current is usually only 3 A. To reduce power-on inrush currents or to sequence the power supply, utilize the SS/ pin.

Connect a capacitor or resistor divider to this pin if you need a gentle start or precise sequencing of your power supplies. As low as the 0.6 V voltage reference is, the output voltage can be ramped down to (VREF). The FB pin on the device is connected to a power good comparator (PGOOD) that hysteretically checks the output voltage. When the value on the FB pin is less than 89% or greater than 108% of the reference voltage VREF, the PGOOD pin, which is an open drain MOSFET, is pushed low, and when the voltage is between 91% and 106% of VREF, it asserts high. The gadget’s output is safeguarded against overvoltage, overload, and overheating.

The gadget reduces excessive output overvoltage transients by taking advantage of the overvoltage circuit’s power good comparator. The high-side MOSFET is disabled until the FB pin voltage drops below 106% of the VREF, which the overvoltage comparator enables. To help regulate the inductor current and prevent current runaway, the circuit uses both unidirectional low-side MOSFET over current protection and unidirectional high-side MOSFET over current protection. If the junction temperature rises above the thermal shutdown trip point, the gadget also turns off. When the junction temperature falls 15 degrees Celsius below the thermal shutdown trip point, the device is immediately restarted under the supervision of the soft start circuit.

TPS54824RNVR Features

The input voltage range of the TPS54824RNVR, a DC/DC converter, is very large, going from 4.5V to 18V, making it useful in many different contexts. The constant output current can be up to 8A, with a switching frequency of 1MHz. The TPS54824RNVR also has other high-end additions, such as:

  • With an efficiency rating of up to 95%, the TPS54824RNVR is a great option for power-hungry applications that need a lot of juice but can’t afford to waste much on waste heat.
  • The TPS54824RNVR has built-in thermal protection to turn off the converter if the device becomes too hot, protecting it from malfunction and potential damage.
  • The TPS54824RNVR has a readily adjustable output voltage that can be modified with an external resistor. This allows designers more leeway to tailor systems to individual needs.
  • The TPS54824RNVR has a soft-start feature that lowers the inrush current at startup, making it easier on the input power supply.
  • The output voltage may be reliably monitored with the help of the TPS54824RNVR’s power good (PG) indicator, which lights up when the voltage is within the unit’s acceptable range.


  • As a result of its many advantages, the TPS54824RNVR is a popular component among architects and engineers. The TPS54824RNVR has several advantages.
  • The TPS54824RNVR is an extremely efficient gadget, with an efficiency rating of up to 95%. As a result of its high efficiency, heat dissipation is limited, and energy waste is kept to a minimum, making it a great option for power-intensive programs.
  • The TPS54824RNVR’s small size and low profile allow it to integrate into various product designs seamlessly.
  • The TPS54824RNVR’s adaptability means that it may be used for various purposes, giving designers more options.
  • The TPS54824RNVR’s straightforward, user-friendly interface makes it a breeze for designers to implement the device into their projects.


In conclusion, the TPS54824RNVR is a highly efficient, versatile, and user-friendly DC/DC converter well-suited for various applications, including telecom and networking devices, industrial automation, and consumer electronics. With its high efficiency, small footprint, and advanced features such as thermal protection and configurable output voltage, the TPS54824RNVR is an excellent choice for designers seeking a high-performance DC/DC converter.

ICRFQ, a reputable supplier of premium electrical components, is the ideal source for obtaining this high-quality component. With our excellent products and outstanding customer service, you can rest assured that you’ll receive the best possible experience. Don’t miss out on the opportunity to elevate your project’s performance – order the TPS54824RNVR now from ICRFQ and enjoy the benefits of this outstanding DC/DC converter.

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Kevin Chen