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TPS54821 - 产品图解:
TPS54821-具有打嗝过流保护的 4.5V 至 17V 输入、8A 同步降压 SWIFT 转换器
TPS54821-转换器(集成开关)-DC/DC开关稳压器-电源管理
TPS54821-4.5V 至 17V 输入 8A 同步降压 SWIFT? 转换器
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TI产品 - TPS54821介绍
TPS54821 - 具有打嗝过流保护的 4.5V 至 17V 输入、8A 同步降压 SWIFT 转换器

TPS54821是TI公司的一款转换器(集成开关)产品,TPS54821是具有打嗝过流保护的 4.5V 至 17V 输入、8A 同步降压 SWIFT 转换器,本页介绍了TPS54821的产品说明、应用、特性等,并给出了与TPS54821相关的TI元器件型号供参考。

TPS54821 - 具有打嗝过流保护的 4.5V 至 17V 输入、8A 同步降压 SWIFT 转换器 - 转换器(集成开关) - DC/DC开关稳压器 - TI公司(Texas Instruments,德州仪器)

产品特性
  • Integrated 26 mΩ / 19 mΩ MOSFETs
  • Split Power Rail: 1.6 V to 17 V on PVIN
  • 200 kHz to 1.6 MHz Switching Frequency
  • Synchronizes to External Clock
  • 0.6V ±1% Voltage Reference Over Temperature
  • Low 2 µA Shutdown Quiescent Current
  • Monotonic Start-Up into Pre-biased Outputs
  • Adjustable Slow Start/Power Sequencing
  • Power Good Output Monitor for Undervoltage and Overvoltage
  • Adjustable Input Undervoltage Lockout
  • Software Tools Available
  • For SWIFT™ Documentation visit http://www.ti.com/swift
产品应用
  • Digital TV Power Supplies
  • Set Top Boxes
  • Blu-ray DVDs
  • Home Terminals
  • High Performance Point of Load Regulation
产品说明

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.

产品器件信息
PART NUMBERPACKAGEBODY SIZE (NOM)
TPS54821VQFN (14)3.50 mm x 3.50 mm
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