ZHCSD26E
August 2012 – August 2018
LMZ21701
PRODUCTION DATA.
1
特性
2
应用
3
说明
Device Images
简化原理图
VIN = 12V 时的效率
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
Package Construction
7.4
Feature Description
7.4.1
Input Undervoltage Lockout
7.4.2
Enable Input (EN)
7.4.3
Soft Start and Tracking Function (SS)
7.4.4
Power Good Function (PG)
7.4.5
Output Voltage Setting
7.4.6
Output Current Limit and Output Short Circuit Protection
7.4.7
Thermal Protection
7.5
Device Functional Modes
7.5.1
PWM Mode Operation
7.5.2
PSM 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
Custom Design With WEBENCH® Tools
8.2.2.2
Input Capacitor (CIN)
8.2.2.3
Output Capacitor (COUT)
8.2.2.4
Soft-start Capacitor (CSS)
8.2.2.5
Power Good Resistor (RPG)
8.2.2.6
Feedback Resistors (RFBB and RFBT)
8.2.3
Application Curves
8.2.3.1
VOUT = 1.2 V
8.2.3.2
VOUT = 1.8 V
8.2.3.3
VOUT = 2.5 V
8.2.3.4
VOUT = 3.3 V
8.2.3.5
VOUT = 5.0 V
8.3
Do's and Don'ts
9
Power Supply Recommendations
9.1
Voltage Range
9.2
Current Capability
9.3
Input Connection
9.3.1
Voltage Drops
9.3.2
Stability
10
Layout
10.1
Layout Guidelines
10.1.1
Minimize the High di/dt Loop Area
10.1.2
Protect the Sensitive Nodes in the Circuit
10.1.3
Provide Thermal Path and Shielding
10.2
Layout Example
10.2.1
High Density Layout Example for Space Constrained Applications
10.2.1.1
35 mm² Solution Size (Single Sided)
11
器件和文档支持
11.1
器件支持
11.1.1
开发支持
11.1.1.1
使用 WEBENCH® 工具创建定制设计
11.2
商标
11.3
静电放电警告
11.4
术语表
12
机械、封装和可订购信息
12.1
Tape and Reel Information
封装选项
请参考 PDF 数据表获取器件具体的封装图。
机械数据 (封装 | 引脚)
SIL|8
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcsd26e_oa
zhcsd26e_pm
10.2.1
High Density Layout Example for Space Constrained Applications