ZHCSH69
December 2017
TPS40345
PRODUCTION DATA.
1
特性
2
应用
3
说明
Device Images
简化应用示意图
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
Voltage Reference
7.3.2
Enable Functionality, Start-Up Sequence and Timing
7.3.3
Soft-Start Time
7.3.4
Oscillator and Frequency Spread Spectrum (FSS)
7.3.5
Overcurrent Protection
7.3.6
Drivers
7.3.7
Prebias Start-Up
7.3.8
Power Good
7.3.9
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
Modes of Operation
7.4.1.1
UVLO
7.4.1.2
Disable
7.4.1.3
Calibration
7.4.1.4
Converting
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Selecting the Switching Frequency
8.2.2.2
Inductor Selection (L1)
8.2.2.3
Output Capacitor Selection (C12)
8.2.2.4
Peak Current Rating of Inductor
8.2.2.5
Input Capacitor Selection (C8)
8.2.2.6
MOSFET Switch Selection (Q1 and Q2)
8.2.2.7
Bootstrap Capacitor (C6)
8.2.2.8
VDD Bypass Capacitor (C7)
8.2.2.9
BP Bypass Capacitor (C5)
8.2.2.10
Short-Circuit Protection (R11)
8.2.2.11
Feedback Divider (R4, R5)
8.2.2.12
Compensation: (C2, C3, C4, R3, R6)
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
器件和文档支持
11.1
器件支持
11.1.1
Third-Party Products Disclaimer
11.2
文档支持
11.2.1
相关文档
11.3
接收文档更新通知
11.4
社区资源
11.5
商标
11.6
静电放电警告
11.7
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
zhcsh69_oa
zhcsh69_pm
1
特性
输入电压范围:3V 至 20V
600kHz 开关频率
高侧和低侧 FET R
DS(on)
电流检测
可编程热补偿 OCP 电平
可编程软启动
600mV、1.3% 基准电压
电压前馈补偿
支持预偏置输出
扩频频谱
145°C 的热关断保护限制
10 引脚 3mm × 3mm VSON 封装,散热垫具有接地连接