TPS54521 - 17V 输入、5A 同步降压转换器

TPS54521是TI德州仪器公司的一款转换器（集成开关）产品，TPS54521是17V 输入、5A 同步降压转换器，本站介绍了TPS54521的封装应用图解、特点和优点、功能等，并给出了与TPS54521相关的TI元器件型号供参考。

TPS54521 - 17V 输入、5A 同步降压转换器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The TPS54521 is a full featured 17V, 5A synchronous step down converter which is optimized for small designs through high efficiency and integrated 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. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal shutdown disables the part when die temperature exceeds thermal shutdown temperature. The TPS54521 is available in a 14 pin, 3.5mm × 3.5mm QFN, thermally enhanced package.

产品特性

Integrated 57mΩ / 50mΩ MOSFETs
Split Power Rail: 1.6V to 17V on PVIN
200kHz to 900kHz Switching Frequency
Synchronizes to External Clock
0.8V Voltage Reference
Low 2µA Shutdown Quiescent Current
Hiccup Overcurrent Protection
Monotonic Start-Up into Prebiased Outputs
–40°C to 125°C Operating Junction Temperature Range
Pin-to-Pin Compatible with the TPS54620
Adjustable Slow Start/Power Sequencing
Power Good Output for Undervoltage and Overvoltage Monitoring
Adjustable Input Undervoltage Lockout
Supported by SwitcherPro Software Tool
APPLICATIONS
- Flat Panel Digital TVs
- Set Top Boxes, Personal Video Recorders
- Net Books
- High Density 3.3V/5V Power Distribution from 12 V Bus

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