PDF《端稳压器》

4 修 修订 订历 历史 史记 记录 录25Pin Configuration and Functions.3

6 Specifications.4 6.1 Absolute Maximum Ratings

4 6.2 ESD Ratings

4 6.3 Recommended Operating Conditions.5 6.4 Thermal Information.5 6.5 Electrical Characteristics.5 6.6 Typical Characteristics.8

7 Detailed Description

15 7.1 Overview

15 7.2 Functional Block Diagram

16 7.3 Feature Description.17 7.4 Device Functional Modes.23

8 Application and Implementation

24 8.1 Application Information.24 8.2 Typical Application

25 9 Power Supply Recommendations.34

10 Layout.34 10.1 Layout Guidelines

34 10.2 Layout Example

35 11 器 器件 件和 和文 文档 档支 支持 持36 11.1 接收文档更新通知

36 11.2 社区资源.36 11.3 商标.36 11.4 静电放电警告.36 11.5 Glossary.36

12 机 机械 械、 、封 封装 装和 和可 可订 订购 购信 信息 息.36

4 修 修订 订历 历史 史记 记录 录Changes from Original (August 2016) to Revision A Page ? Changed pin

18 From: RT/CLK To: RT/SYNC in the Pin Functions table.4 ? Changed R(RT/CLK) To: R(RT/SYNC) in 图16 and 图17.9 ? Changed The RT/CLK is typically 0.5 V.. To: The RT/SYNC is typically 0.5 V.. in Constant Switching Frequency and Timing Resistor (RT/SYNC)20

3 TPS54116-Q1 www.ti.com.cn ZHCSFG9A CAUGUST 2016CREVISED AUGUST

2016 Copyright ? 2016, Texas Instruments Incorporated

5 Pin Configuration and Functions RTW Package WQFN

24 Pins Top View Pin Functions PIN I/O DESCRIPTION NAME NO. SW 1, 23,

24 O Switching node of the buck converter. BOOT

2 I Bootstrap capacitor node for high-side MOSFET gate driver of the buck converter. Connect the bootstrap capacitor from this pin to the SW pin. AVIN

3 I The input supply pin to the IC, powering the control circuits of both the buck converter and DDR termination regulator. Connect AVIN to a supply voltage between 2.95 V and

6 V. ENSW

4 I Buck converter enable pin with internal pull-up current source. Floating this pin will enable the IC. Pull below 1.17 V to enter low current standby mode. Pull below 0.4 V to enter shutdown mode. The ENSW pin can be used to implement adjustable under-voltage lockout (UVLO) using two resistors. ENLDO

5 I VTT LDO enable pin with internal pull-up current source. Floating this pin will enable the IC. Pull below 1.17 V to enter low current standby mode. Pull below 0.4 V to enter shutdown mode. The ENLDO pin can be used to implement adjustable under-voltage lockout (UVLO) using two resistors. PGOOD

6 O Power good indicator for the buck regulator. This pin is an open-drain output. A 10-kΩ pull- up resistor is recommended between PGOOD and AVIN or an external logic supply pin. VDDQSNS

7 I VDDQ sense input to generate VDDQ/2 reference for VTTREF. LDOIN

8 I Power supply input for VTT LDO. Connected VDDQ in typical application. Alternatively this pin can be used for split-rail configuration to reduce power dissipation when sourcing current to the VTT output by powering........