ZHCSL19C
May 2019 – June 2021
LM61440
PRODUCTION DATA
1
特性
2
应用
3
说明
4
Revision History
5
Device Comparison Table
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
Timing Characteristics
7.7
Systems Characteristics
7.8
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
EN/SYNC Uses for Enable and VIN UVLO
8.3.2
EN/SYNC Pin Uses for Synchronization
8.3.3
Clock Locking
8.3.4
Adjustable Switching Frequency
8.3.5
PGOOD Output Operation
8.3.6
Internal LDO, VCC UVLO, and BIAS Input
8.3.7
Bootstrap Voltage and VCBOOT-UVLO (CBOOT Pin)
8.3.8
Adjustable SW Node Slew Rate
8.3.9
Spread Spectrum
8.3.10
Soft Start and Recovery From Dropout
8.3.11
Output Voltage Setting
8.3.12
Overcurrent and Short Circuit Protection
8.3.13
Thermal Shutdown
8.3.14
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
9.2.2.3
Inductor Selection
9.2.2.4
Output Capacitor Selection
9.2.2.5
Input Capacitor Selection
9.2.2.6
BOOT Capacitor
9.2.2.7
BOOT Resistor
9.2.2.8
VCC
9.2.2.9
BIAS
9.2.2.10
CFF and RFF Selection
9.2.2.11
External UVLO
9.2.3
Application Curves
9.2.4
USB Type-C System Example
9.2.4.1
Design Requirements
9.2.4.2
Detailed Design Procedure
9.2.4.3
Application Curves
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)
RJR|14
MPQF507D
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcsl19c_oa
zhcsl19c_pm
12.1.1
Related Documentation
For related documentation see the following:
Texas Instruments,
LM61460-Q1 EVM User's Guide
Texas Instruments,
30 W Power for Automotive Dual USB Type-C Charge Port Reference Design
Texas Instruments,
EMI Filter Components and Their Nonidealities for Automotive DC/DC Regulators Technical Brief
Texas Instruments,
AN-2020 Thermal Design by Insight, Not Hindsight Application Report
Texas Instruments
Optimizing the Layout for the TPS54424/TPS54824 HotRod QFN Package for Thermal Performance Application Report
Texas Instruments,
AN-2162 Simple Success With Conducted EMI From DC-DC Converters Application Report
Texas Instruments,
Practical Thermal Design With DC/DC Power Modules Application Report