TPS54821RHLR Part Information

Details for TPS54821RHLR by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Power Management

Buy TPS54821RHLR Directly from Texas Instruments (0 in stock) at $1.1000

Part Description

The TPS54821 in thermally enhanced 3.5 mm x 3.5 mm QFN package is a full featured 17 V, 8 A synchronous step down converter which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. Further space savings are achieved through current mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor's footprint. The output voltage startup ramp is controlled by the SS/TR pin which allows operation as either a stand alone power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and the open drain power good pins. Cycle by cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the device when the die temperature exceeds the thermal shutdown temperature and enables the part again after the built-in thermal shutdown hiccup time.

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Part Features

  • 0.6V u00b11% Voltage Reference Over Temperature
  • 200 kHz to 1.6 MHz Switching Frequency
  • Adjustable Input Undervoltage Lockout
  • Adjustable Slow Start/Power Sequencing
  • Integrated 26 mu2126 / 19 mu2126 MOSFETs
  • Low 2 u00b5A Shutdown Quiescent Current
  • Monotonic Start-Up into Pre-biased Outputs
  • Power Good Output Monitor for Undervoltage and Overvoltage
  • Software Tools Available
  • Split Power Rail: 1.6 V to 17 V on PVIN
  • Synchronizes to External Clock

Part Specifications

Topology Synchronous Buck (Step Down)
Input Voltage Min 4.5V
Input Voltage Max 17V
No. of Outputs 1Outputs
DC / DC Converter IC Case VQFN
No. of Pins 14Pins
Output Current 8A
Output Voltage Min 600mV
Output Voltage Max 15V
Switching Frequency 1.6MHz
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
MSL -
SVHC No SVHC (27-Jun-2018)
RoHS Compliant

Alternative Part Descriptions

  • DC/DC CONV, SYNC BUCK, 1.6MHZ, VQFN-14; Topology:Synchronous Buck (Step Down); Input Voltage Min:4.5V; Input Voltage Max:17V; No. of Outputs:1Outputs; DC / DC Converter IC Case:VQFN; No. of Pins:14Pins; Output Current:8A; Output RoHS Compliant: Yes | Newark Electronics
  • 4.5-V to 17-V, 8-A synchronous buck converter with hiccup current limit | Texas Instruments

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