ZHCSMW2B
December 2021 – December 2022
LM5123-Q1
PRODUCTION DATA
1
特性
2
应用
3
说明
4
Revision History
5
说明(续)
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Device Enable/Disable (EN, VH Pin)
8.3.2
High Voltage VCC Regulator (BIAS, VCC Pin)
8.3.3
Light Load Switching Mode Selection (MODE Pin)
8.3.4
VOUT Range Selection (RANGE Pin)
8.3.5
Line Undervoltage Lockout (UVLO Pin)
8.3.6
Fast Restart using VCC HOLD (VH Pin)
8.3.7
Adjustable Output Regulation Target (VOUT, TRK, VREF Pin)
8.3.8
Overvoltage Protection (VOUT Pin)
8.3.9
Power Good Indicator (PGOOD Pin)
8.3.10
Dynamically Programmable Switching Frequency (RT)
8.3.11
External Clock Synchronization (SYNC Pin)
8.3.12
Programmable Spread Spectrum (DITHER Pin)
8.3.13
Programmable Soft Start (SS Pin)
8.3.14
Wide Bandwidth Transconductance Error Amplifier and PWM (TRK, COMP Pin)
8.3.15
Current Sensing and Slope Compensation (CSP, CSN Pin)
8.3.16
Constant Peak Current Limit (CSP, CSN Pin)
8.3.17
Maximum Duty Cycle and Minimum Controllable On-Time Limits
8.3.18
Deep Sleep Mode and Bypass Operation (HO, CP Pin)
8.3.19
MOSFET Drivers, Integrated Boot Diode, and Hiccup Mode Fault Protection (LO, HO, HB Pin)
8.3.20
Thermal Shutdown Protection
8.4
Device Functional Modes
8.4.1
Device Status
8.4.1.1
Shutdown Mode
8.4.1.2
Configuration Mode
8.4.1.3
Active Mode
8.4.1.4
Sleep Mode
8.4.1.5
Deep Sleep Mode
8.4.2
Light Load Switching Mode
8.4.2.1
Forced PWM (FPWM) Mode
8.4.2.2
Diode Emulation (DE) Mode
8.4.2.3
Forced Diode Emulation Operation in FPWM Mode
8.4.2.4
Skip Mode
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Application Ideas
9.2.3
Application Curves
9.3
System Example
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Device Support
12.1.1
第三方产品免责声明
12.2
接收文档更新通知
12.3
支持资源
12.4
Trademarks
12.5
Electrostatic Discharge Caution
12.6
术语表
13
Mechanical, Packaging, and Orderable 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)
RGR|20
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcsmw2b_oa
zhcsmw2b_pm
8
Detailed Description