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
1
特性
符合面向汽车应用的 AEC-Q100 标准
温度等级 1:–40°C 至 125°C T
A
用于升压或降压直流/直流转换的单电感器降压/升压控制器
宽 V
IN
:4.2V(2.5V 偏置)至 30V(42V 最大输入电压)
灵活的 V
OUT
:0.8 V 至 30 V
输出电压
短路保护
高效降压/升压转换
可调开关频率
可选频率同步和抖动
集成 2A MOSFET 栅极驱动器
逐周期电流限制和可选断续模式
可选输入或输出平均电流限制
可编程输入 UVLO 和软启动
电源正常和输出过压保护
采用带有
PowerPAD™
的 28 引脚 HTSSOP 封装
使用 LM34936-Q1 并借助
WEBENCH Power Designer
创建定制设计方案