TPS51117 - 针对轻载效率优化的具有 DCAP? 模式的 1.8V 至 28V 输入同步降压控制器

TPS51117是TI德州仪器公司的一款控制器（外部开关）产品，TPS51117是针对轻载效率优化的具有 DCAP? 模式的 1.8V 至 28V 输入同步降压控制器，本站介绍了TPS51117的封装应用图解、特点和优点、功能等，并给出了与TPS51117相关的TI元器件型号供参考。

TPS51117 - 针对轻载效率优化的具有 DCAP? 模式的 1.8V 至 28V 输入同步降压控制器 - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品特性

High Efficiency, Low Power Consumption, 4.5-μA Typical Shutdown Current
Fixed Frequency Emulated On-Time Control, Adjustable from 100 kHz to 550 kHz
D-CAP™ Mode With 100-ns Load Step Response
< 1% Initial Reference Accuracy
Output Voltage Range: 0.75 V to 5.5 V
Wide Input Voltage Range: 1.8 V to 28 V
Selectable Auto-Skip/PWM-Only Operation
Temperature Compensated (4500 ppm/°C) Low-Side RDS(on) Overcurrent Sensing
Negative Overcurrent Limit
Integrated Boost Diode
Integrated OVP/UVP and Thermal Shutdown
Powergood Signal
Internal 1.2-ms Voltage Soft-Start
Integrated Output Discharge (Soft-Stop)

产品应用

Notebook Computers
I/O Supplies
System Power Supplies

产品说明

The TPS51117 device is a cost-effective, synchronous buck controller for POL voltage regulation in notebook PC applications. The controller is dedicated for the operation of the Adaptive On-Time D-CAP mode. This mode provides ease-of-use, low external component count, and fast transient response. Auto-skip mode for high efficiency down to the milliampere load range, or PWM-only mode for low-noise operation is selectable.

The current-sensing scheme for positive overcurrent and negative overcurrent protection is loss-less low-side RDS(on) sensing plus temperature compensation. The device receives a 5-V (4.5 V to 5.5 V) supply from another regulator such as the TPS51120 or TPS51020. The conversion input can be either VBAT or a 5-V rail, ranging from 1.8 V to 28 V, and the output voltage range is from 0.75 V to 5.5 V.

The TPS51117 is available in a 14-pin VQFN or a 14-pin TSSOP package and is specified from –40°C to 85°C.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS51117	TSSOP (14)	4.40 mm × 5.00 mm
TPS51117	VQFN (14)	3.50 mm × 3.50 mm

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TPS51117 - 针对轻载效率优化的具有 DCAP? 模式的 1.8V 至 28V 输入同步 降压控制器

TPS51117 - 针对轻载效率优化的具有 DCAP? 模式的 1.8V 至 28V 输入同步降压控制器