ZHCSD91B
January 2015 – January 2022
TPS65251-1
,
TPS65251-2
,
TPS65251-3
PRODUCTION DATA
1
特性
2
应用
3
说明
4
Revision History
5
Pin Configuration and 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 for Buck 1
6.7
Typical Characteristics for Buck 2
6.8
Typical Characteristics for Buck 3
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Adjustable Switching Frequency
7.3.2
Synchronization
7.3.3
Out-of-Phase Operation
7.3.4
Delayed Start-Up
7.3.5
Soft-Start Time
7.3.6
Adjusting the Output Voltage
7.3.7
Input Capacitor
7.3.8
Bootstrap Capacitor
7.3.9
Error Amplifier
7.3.10
Slope Compensation
7.3.11
Power Good
7.3.12
3.3-V and 6.5-V LDO Regulators
7.3.13
Current Limit Protection
7.3.14
Overvoltage Transient Protection (OVP)
7.3.15
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
Low-Power/Pulse Skipping Operation
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
Loop Compensation Circuit
8.2.2.2
Selecting the Switching Frequency
8.2.2.3
Output Inductor Selection
8.2.2.4
Output Capacitor
8.2.2.5
Input Capacitor
8.2.2.6
Soft-Start Capacitor
8.2.2.7
Bootstrap Capacitor Selection
8.2.2.8
Adjustable Current Limiting Resistor Selection
8.2.2.9
Output Voltage and Feedback Resistors Selection
8.2.2.10
Compensation
8.2.2.11
3.3-V and 6.5-V LDO Regulators
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
接收文档更新通知
11.2
支持资源
11.3
Trademarks
11.4
Electrostatic Discharge Caution
11.5
术语表
12
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
RHA|40
MPQF135D
散热焊盘机械数据 (封装 | 引脚)
RHA|40
QFND227K
订购信息
zhcsd91b_oa
zhcsd91b_pm
7.2
Functional Block Diagram