ZHCSE52B
September 2015 – May 2019
TPS57140-EP
PRODUCTION DATA.
1
特性
2
应用范围
3
说明
Device Images
简化原理图
效率与负载电流间的关系
4
修订历史记录
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Fixed Frequency PWM Control
7.3.2
Slope-Compensation Output Current
7.3.3
Bootstrap Voltage (Boot)
7.3.4
Low-Dropout Operation
7.3.5
Error Amplifier
7.3.6
Voltage Reference
7.3.7
Adjusting the Output Voltage
7.3.8
Enable and Adjusting UVLO
7.3.9
Slow-Start or Tracking Pin (SS/TR)
7.3.10
Overload Recovery Circuit
7.3.11
Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
7.3.12
Overcurrent Protection and Frequency Shift
7.3.13
Selecting the Switching Frequency
7.3.14
How to Interface to RT/CLK Pin
7.3.15
Power Good (PWRGD Pin)
7.3.16
Overvoltage Transient Protection (OVTP)
7.3.17
Thermal Shutdown
7.3.18
Small-Signal Model for Loop Response
7.3.19
Simple Small-Signal Model for Peak-Current-Mode Control
7.3.20
Small-Signal Model for Frequency Compensation
7.4
Device Functional Modes
7.4.1
Sequencing
7.4.2
Pulse-Skip Eco-mode Control Scheme
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Selecting the Switching Frequency
8.2.2.2
Output Inductor Selection (LO)
8.2.2.3
Output Capacitor
8.2.2.4
Catch Diode
8.2.2.5
Input Capacitor
8.2.2.6
Slow-Start Capacitor
8.2.2.7
Bootstrap Capacitor Selection
8.2.2.8
UVLO Set Point
8.2.2.9
Output Voltage and Feedback Resistors Selection
8.2.2.10
Compensation
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.3
Power-Dissipation Estimate
11
器件和文档支持
11.1
接收文档更新通知
11.2
社区资源
11.3
商标
11.4
静电放电警告
11.5
Glossary
12
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
DRC|10
MPDS117L
散热焊盘机械数据 (封装 | 引脚)
DRC|10
QFND013N
订购信息
zhcse52b_oa
zhcse52b_pm
10.2
Layout Example
Figure 66.
PCB Layout Example