TPS54678 - 具有集成 FET 的 2.95V 至 6V 输出 2MHz 同步降压开关

TPS54678是TI德州仪器公司的一款转换器（集成开关）产品，TPS54678是具有集成 FET 的 2.95V 至 6V 输出 2MHz 同步降压开关，本站介绍了TPS54678的封装应用图解、特点和优点、功能等，并给出了与TPS54678相关的TI元器件型号供参考。

TPS54678 - 具有集成 FET 的 2.95V 至 6V 输出 2MHz 同步降压开关 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品特性

Two 12-mΩ (Typical) MOSFETs for High-Efficiency 6-A Continuous Output Current
200-kHz to 2-MHz Switching Frequency
0.6-V ±1% Voltage Reference Over Temperature (–40°C to 150°C)
Synchronizes to External Clock
Start-Up With Prebiased Voltage
Power Good Output
Adjustable Slow Start and Sequencing
Cycle-by-Cycle Current Limit and Hiccup Current Protection
Adjustable Input Voltage UVLO
Thermally Enhanced 16-Pin 3-mm × 3-mm WQFN (RTE)

产品应用

Low-Voltage, High-Density Power Systems
Point-of-Load Regulation for High-Performance DSPs, FPGAs, ASICs, and Microprocessors
Broadband, Networking, and Optical
Communications Infrastructure
Gaming, DTV, and Set-Top Boxes

产品说明

TPS54678 device is a full-featured 6-V, 6-A, synchronous step-down current mode converter with two integrated MOSFETs.

TPS54678 enables small designs by integrating the MOSFETs, implementing current mode control to reduce external component count, reducing inductor size by enabling up to 2-MHz switching frequency, and minimizing the IC footprint with a small 3-mm × 3-mm thermally enhanced WQFN package.

TPS54678 provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (VREF) over temperature.

Efficiency is maximized through the integrated 12-mΩ MOSFETs. Using the enable pin, shutdown supply current is reduced by disabling the device.

The output voltage start-up ramp is controlled by the soft-start pin that can also be configured for sequencing or tracking. Monotonic start-up is achieved with prebiased voltage. Undervoltage lockout can be increased by programming the threshold with a resistor divider on the enable pin. An open-drain power good signal indicates the output is within 93% to 105% of its nominal voltage.

Cycle-by-cycle current limit, hiccup overcurrent protection and thermal shutdown protect the device during an overcurrent condition.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS54678	WQFN (16)	3.00 mm × 3.00 mm

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