TPS54428 - 具有自动跳过 Eco Mode 的 4.5V 至 18V 输入、4A 同步降压转换器

TPS54428是TI德州仪器公司的一款转换器（集成开关）产品，TPS54428是具有自动跳过 Eco Mode 的 4.5V 至 18V 输入、4A 同步降压转换器，本站介绍了TPS54428的封装应用图解、特点和优点、功能等，并给出了与TPS54428相关的TI元器件型号供参考。

TPS54428 - 具有自动跳过 Eco Mode 的 4.5V 至 18V 输入、4A 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

产品特性

D-CAP2™ Mode Enables Fast Transient Response
Low Output Ripple and Allows Ceramic Output Capacitor
Wide VIN Input Voltage Range: 4.5 V to 18 V
Output Voltage Range: 0.76 V to 7.0 V
Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications – 70 mΩ (High Side) and 53 mΩ (Low Side)
High Efficiency, Less Than 10 μA at Shutdown
High Initial Bandgap Reference Accuracy
Adjustable Soft Start
Pre-Biased Soft Start
650-kHz Switching Frequency (fSW)
Cycle By Cycle Over Current Limit
Auto-Skip Eco-mode™ for High Efficiency at Light Load

产品应用

Wide Range of Applications for Low Voltage System
- Digital TV Power Supply
- High Definition Blu-ray Disc™ Players
- Networking Home Terminal
- Digital Set Top Box (STB)

产品说明

The TPS54428 is an adaptive on-time D-CAP2™ mode synchronous buck converter.

The TPS54428 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution.

The main control loop for the TPS54428 uses the D-CAP2™ mode control that provides a fast transient response with no external compensation components.

The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ operation at light loads.

Eco-mode™ allows the TPS54428 to maintain high efficiency during lighter load conditions.

The TPS54428 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input.

The output voltage can be programmed between 0.76 V and 7.0 V.

The device also features an adjustable soft start time.

The TPS54428 is available in 8-pin DDA package and 10-pin DRC packages, and is designed to operate over the ambient temperature range of –40°C to 85°C.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS54428	HSOP (8)	4.90 mm × 3.90 mm
TPS54428	VSON (10)	3.00 mm × 3.00 mm

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