ZHCSG87E
February 2017 – August 2019
TPS61178
PRODUCTION DATA.
1
特性
2
应用
3
说明
Device Images
典型应用
4
修订历史记录
5
Device Comparison Table
6
Pin Configuration and Functions
Pin Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Timing Requirements
7.7
Switching Characteristics
7.8
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Under-voltage Lockout
8.3.2
Enable and Disable
8.3.3
Startup
8.3.4
Load Disconnect Gate Driver
8.3.5
Adjustable Peak Current Limit
8.3.6
Output Short Protection (with load disconnected FET)
8.3.7
Adjustable Switching Frequency
8.3.8
External Clock Synchronization (TPS611781)
8.3.9
Error Amplifier
8.3.10
Slope Compensation
8.3.11
Start-up with the Output Pre-Biased
8.3.12
Bootstrap Voltage (BST)
8.3.13
Over-voltage Protection
8.3.14
Thermal Shutdown
8.4
Device Functional Modes
8.4.1
Operation
8.4.2
Auto PFM Mode (TPS61178)
8.4.3
Forced PWM Mode (TPS611781)
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Custom Design With WEBENCH® Tools
9.2.2.2
Setting the Switching Frequency
9.2.3
Setting the Current Limit
9.2.4
Setting the Output Voltage
9.2.4.1
Selecting the Inductor
9.2.4.2
Selecting the Output Capacitors
9.2.4.3
Selecting the Input Capacitors
9.2.4.4
Loop Stability and Compensation
9.2.4.4.1
Small Signal Model
9.2.4.4.2
Loop Compensation Design Steps
9.2.4.4.3
Selecting the Disconnect FET
9.2.4.4.4
Selecting the Bootstrap Capacitor
9.2.4.4.5
VCC Capacitor
9.2.5
TPS61178 Application Waveform
9.3
System Examples
9.3.1
TPS61178 with 14-V Output from 2.7-V to 4.4-V Input Voltage
9.3.2
TPS61178 Without Load Disconnect Function
9.3.3
TPS611781 External Clock Synchronization
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
器件和文档支持
12.1
器件支持
12.1.1
第三方产品免责声明
12.1.2
开发支持
12.1.2.1
使用 WEBENCH® 工具创建定制设计
12.2
文档支持
12.2.1
相关文档
12.3
相关链接
12.4
接收文档更新通知
12.5
社区资源
12.6
商标
12.7
静电放电警告
12.8
Glossary
13
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
RNW|13
MPDS580B
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcsg87e_oa
zhcsg87e_pm
1
特性
输入电压范围:2.7V 至 20V
输出电压范围:4.5V 至 20V
可编程开关峰值电流:高达 10A
集成了两个 16mΩ FET
效率高达 96%:V
IN
= 7.2V,V
OUT
= 16V,I
OUT
= 2A
可调节开关频率:高达 2.2MHz
外部时钟同步:
200kHz 至 2.2MHz
可提供负载断开功能的栅极驱动器
自动切断短路保护功能
过压保护
自动 PFM 操作 - TPS61178
强制 PWM 模式 - TPS611781
3mm x 3.5mm 13 引脚 VQFN Hotrod 封装
使用 TPS61178 并借助
WEBENCH® 电源设计器
创建定制设计方案