ZHCSJU8G
February 2011 – March 2022
LM21215
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 Ratings
6.4
Electrical Characteristics
6.5
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Precision Enable
7.3.2
UVLO
7.3.3
Current Limit
7.3.4
Short-Circuit Protection
7.3.5
Thermal Protection
7.3.6
Light Load Operation
7.3.7
Power Good Flag
7.4
Device Functional Modes
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Typical Application 1
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Custom Design With WEBENCH® Tools
8.2.1.2.2
Output Voltage
8.2.1.2.3
Precision Enable
8.2.1.2.4
Soft Start
8.2.1.2.5
Inductor Selection
8.2.1.2.6
Output Capacitor Selection
8.2.1.2.7
Input Capacitor Selection
8.2.1.2.8
Programmable Current Limit
8.2.1.2.9
Control Loop Compensation
8.2.1.3
Application Curves
8.2.2
Typical Application Schematic 2
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
9
Layout
9.1
Layout Considerations
9.2
Layout Example
9.2.1
Thermal Considerations
10
Device and Documentation Support
10.1
Device Support
10.1.1
第三方产品免责声明
10.1.2
Development Support
10.1.2.1
Custom Design With WEBENCH® Tools
10.2
接收文档更新通知
10.3
支持资源
10.4
Trademarks
10.5
Electrostatic Discharge Caution
10.6
术语表
11
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
PWP|20
MHTS001G
散热焊盘机械数据 (封装 | 引脚)
PWP|20
PPTD299
订购信息
zhcsju8g_oa
zhcsju8g_pm
1
特性
集成式 7 mΩ 高侧和 4.3 mΩ 低侧 FET 开关
可调节电流限制
可调输出电压范围为 0.6V 至 V
IN
(支持 100% 占空比),基准为 ±1%
2.95V 至 5.5V 输入电压范围
500 kHz 固定开关频率
启动至预偏置负载
输出电压跟踪功能
高带宽电压环路误差放大器
通过外部电容器进行可调软启动
具有迟滞功能的精密使能引脚
集成 OVP、OTP、UVLO 和电源正常状态
热增强型 20 引脚 HTSSOP 外露焊盘封装
使用 LM21215 并借助
WEBENCH®
Power Designer
创建定制设计