ZHCSKX8B
September 2019 – September 2020
LMR36503-Q1
PRODUCTION DATA
1
特性
2
应用
3
说明
4
Revision History
5
Device Comparison Table
6
Pin Configuration and Functions
Pin Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD (Automotive) Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Timing Characteristics
7.7
Switching Characteristics
7.8
System Characteristics
7.9
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Enable, Start-up and Shutdown
8.3.2
External CLK SYNC (with MODE/SYNC)
8.3.2.1
Pulse-Dependent MODE/SYNC Pin Control
8.3.3
Adjustable Switching Frequency (with RT)
8.3.4
Power-Good Output Operation
8.3.5
Internal LDO, VCC UVLO, and VOUT/BIAS Input
8.3.6
Bootstrap Voltage and VCBOOT-UVLO (CBOOT Terminal)
8.3.7
Output Voltage Selection
8.3.8
Soft Start and Recovery from Dropout
8.3.8.1
Recovery from Dropout
8.3.9
Current Limit and Short Circuit
8.3.10
Thermal Shutdown
8.3.11
Input Supply Current
8.4
Device Functional Modes
8.4.1
Shutdown Mode
8.4.2
Standby Mode
8.4.3
Active Mode
8.4.3.1
CCM Mode
8.4.3.2
Auto Mode - Light Load Operation
8.4.3.2.1
Diode Emulation
8.4.3.2.2
Frequency Reduction
8.4.3.3
FPWM Mode - Light Load Operation
8.4.3.4
Minimum On-time (High Input Voltage) Operation
8.4.3.5
Dropout
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
Choosing the Switching Frequency
9.2.2.2
Setting the Output Voltage
9.2.2.2.1
FB for Adjustable Output
9.2.2.3
Inductor Selection
9.2.2.4
Output Capacitor Selection
9.2.2.5
Input Capacitor Selection
9.2.2.6
CBOOT
9.2.2.7
VCC
9.2.2.8
CFF Selection
9.2.2.8.1
External UVLO
9.2.2.9
Maximum Ambient Temperature
9.2.3
Application Curves
9.3
What to Do and What Not to Do
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.1.1
Ground and Thermal Considerations
11.2
Layout Example
12
Device and Documentation Support
12.1
Documentation Support
12.1.1
Related Documentation
12.2
接收文档更新通知
12.3
支持资源
12.4
Trademarks
12.5
静电放电警告
12.6
术语表
13
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
RPE|9
MPQF528A
散热焊盘机械数据 (封装 | 引脚)
RPE|9
QFND681A
订购信息
zhcskx8b_oa
zhcskx8b_pm
8.2
Functional Block Diagram
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