TPS56921 - 具有 VID 控制的 4.5V 至 17V 输入、9A 同步降压 SWIFT? 转换器

TPS56921是TI德州仪器公司的一款转换器（集成开关）产品，TPS56921是具有 VID 控制的 4.5V 至 17V 输入、9A 同步降压 SWIFT? 转换器，本站介绍了TPS56921的封装应用图解、特点和优点、功能等，并给出了与TPS56921相关的TI元器件型号供参考。

TPS56921 - 具有 VID 控制的 4.5V 至 17V 输入、9A 同步降压 SWIFT? 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 TPS56921 in thermally enhanced 20-pin HTSSOP package is a full featured 17V, 9A synchronous step down converter which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. After the initial power-up, the output voltage can be changed by codes sent to the IC via an I2C compatible VID Control bus. Current mode control provides space savings and easy compensation.

The output voltage startup ramp is controlled by the SS pin which helps to control startup inrush current. Power sequencing is supported by configuring the enable and the open drain power good pins. The output voltage is user-configurable at startup by external voltage divider.

Cycle by cycle current limiting on the high-side fet protects the TPS56921 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 part when die temperature exceeds thermal shutdown temperature and enables the part again after the built-in thermal hiccup time.

产品特性

VID Control Range via I2C Compatible Interface: 0.72V to 1.48V in 10mV Steps
I2C Addressing Flexibility: 2 Bits by IC pins
±1.5% Output Voltage over Temperature for VID Control
±1% Reference Voltage over Temperature for External Regulation Mode
Integrated 26m? / 19mΩ MOSFETs
Power Input PVIN Voltage Range: 1.6V to 17V
Switching Frequency: 200kHz to 1.6MHz Internal Oscillator or Synchronizing to External Clock
Shutdown Current: 2µA
Monotonic Start-Up into Pre-biased Output Voltage
Overcurrent Protection for Both MOSFETs with Hiccup Mode for Severe Fault Conditions
Thermal and Overvoltage Protection
Adjustable Soft Start
Power Good Monitor for Under- and Over- Voltage Conditions
Operating Junction Temperature Range: –40°C to 125°C
Available in 20-Pin HTSSOP Package with PowerPADTM

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