ZHCSJ68A
December 2018 – September 2021
LM34936-Q1
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 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
Feature Description
7.3.1
Fixed Frequency Valley/Peak Current Mode Control with Slope Compensation
7.3.2
VCC Regulator and Optional BIAS Input
7.3.3
Enable/UVLO
7.3.4
Soft Start
7.3.5
Overcurrent Protection
7.3.6
Average Input/Output Current Limiting
7.3.7
Operation Above 28-V Input
7.3.8
CCM Operation
7.3.9
Frequency and Synchronization (RT/SYNC)
7.3.10
Frequency Dithering
7.3.11
Output Overvoltage Protection (OVP)
7.3.12
Power Good (PGOOD)
7.3.13
Gm Error Amplifier
7.3.14
Integrated Gate Drivers
7.3.15
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
Shutdown, Standby, and Operating Modes
7.4.2
MODE Pin Configuration
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
Frequency
8.2.2.3
VOUT
8.2.2.4
Inductor Selection
8.2.2.5
Output Capacitor
8.2.2.6
Input Capacitor
8.2.2.7
Sense Resistor (RSENSE)
8.2.2.8
Slope Compensation
8.2.2.9
UVLO
8.2.2.10
Soft-Start Capacitor
8.2.2.11
Dither Capacitor
8.2.2.12
MOSFETs QH1 and QL1
8.2.2.13
MOSFETs QH2 and QL2
8.2.2.14
Frequency Compensation
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
第三方产品免责声明
11.1.2
Development Support
11.1.2.1
Custom Design with WEBENCH Tools
11.2
Documentation Support
11.2.1
Related Documentation
11.3
接收文档更新通知
11.4
支持资源
11.5
Trademarks
11.6
静电放电警告
11.7
术语表
12
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
PWP|28
MPDS373B
散热焊盘机械数据 (封装 | 引脚)
PWP|28
PPTD396
订购信息
zhcsj68a_oa
zhcsj68a_pm
8.2.3
Application Curves
Figure 8-2
Efficiency vs Load
Figure 8-4
Output Voltage Ripple
Figure 8-3
Efficiency vs Input Voltage
Figure 8-5
Line Transient Response (8 V – 24 V, I
OUT
= 2 A)