ZHCSIY8B
October 2018 – October 2019
LM5143-Q1
PRODUCTION DATA.
1
特性
2
应用
3
说明
Device Images
高效的双路降压稳压器
4
修订历史记录
5
说明 (续)
6
Pin Configuration and Functions
Pin Functions
6.1
Wettable Flanks
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
Switching Characteristics
7.7
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Input Voltage Range (VIN)
8.3.2
High-Voltage Bias Supply Regulator (VCC, VCCX, VDDA)
8.3.3
Enable (EN1, EN2)
8.3.4
Power Good Monitor (PG1, PG2)
8.3.5
Switching Frequency (RT)
8.3.6
Clock Synchronization (DEMB)
8.3.7
Synchronization Out (SYNCOUT)
8.3.8
Spread Spectrum Frequency Modulation (DITH)
8.3.9
Configurable Soft-Start (SS1, SS2)
8.3.10
Output Voltage Setpoint (FB1, FB2)
8.3.11
Minimum Controllable On-Time
8.3.12
Error Amplifier and PWM Comparator (FB1, FB2, COMP1, COMP2)
8.3.13
Slope Compensation
8.3.14
Inductor Current Sense (CS1, VOUT1, CS2, VOUT2)
8.3.14.1
Shunt Current Sensing
8.3.14.2
Inductor DCR Current Sensing
8.3.15
Hiccup Mode Current Limiting (RES)
8.3.16
High-Side and Low-Side Gate Drivers (HO1/2, LO1/2, HOL1/2, LOL1/2)
8.3.17
Output Configurations (MODE, FB2)
8.3.17.1
Independent Dual-Output Operation
8.3.17.2
Single-Output Interleaved Operation
8.3.17.3
Single-Output Multiphase Operation
8.4
Device Functional Modes
8.4.1
Standby Modes
8.4.2
Diode Emulation Mode
8.4.3
Thermal Shutdown
9
Application and Implementation
9.1
Application Information
9.1.1
Power Train Components
9.1.1.1
Buck Inductor
9.1.1.2
Output Capacitors
9.1.1.3
Input Capacitors
9.1.1.4
Power MOSFETs
9.1.1.5
EMI Filter
9.1.2
Error Amplifier and Compensation
9.2
Typical Applications
9.2.1
Design 1 – High Efficiency, Dual-Output Buck Regulator for Automotive Body Applications
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.2.1
Custom Design With WEBENCH® Tools
9.2.1.2.2
Custom Design With Excel Quickstart Tool
9.2.1.2.3
Inductor Calculation
9.2.1.2.4
Current-Sense Resistance
9.2.1.2.5
Output Capacitors
9.2.1.2.6
Input Capacitors
9.2.1.2.7
Compensation Components
9.2.1.3
Application Curves
9.2.2
Design 2 – Two-Phase, Single-Output Buck Regulator for Automotive ADAS Applications
9.2.2.1
Design Requirements
9.2.2.2
Detailed Design Procedures
9.2.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.1.1
Power Stage Layout
11.1.2
Gate-Drive Layout
11.1.3
PWM Controller Layout
11.1.4
Thermal Design and Layout
11.1.5
Ground Plane Design
11.2
Layout Example
12
器件和文档支持
12.1
器件支持
12.1.1
第三方产品免责声明
12.1.2
开发支持
12.1.3
使用 WEBENCH® 工具创建定制设计
12.2
文档支持
12.2.1
相关文档
12.2.1.1
PCB 布局资源
12.2.1.2
热设计资源
12.3
接收文档更新通知
12.4
支持资源
12.5
商标
12.6
静电放电警告
12.7
Glossary
13
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
RWG|40
MPQF420
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcsiy8b_oa
zhcsiy8b_pm
1
特性
符合面向汽车 应用的 AEC-Q100 标准:
器件温度等级 1:–40°C 至 +125°C 的环境工作温度范围
多功能同步降压直流/直流控制器
宽输入电压范围为 3.5V 至
65V
1% 精度、3.3V/5V 固定电压或 0.6V 至
55V
可调输出电压
150°C 最大结温
关断模式电流:4µA(典型值)
空载待机电流:15µA(典型值)
两个交错式同步降压通道
双通道或单输出多相
65ns t
ON(min)
,可实现高 V
IN
/V
OUT
比
60ns t
OFF(min)
,可实现低压降
开关频率范围为 100kHz 至 2.2MHz
同步输入和同步输出功能
固有保护 特性 ,可实现稳健设计
断续模式过流保护
独立的使能和 PGOOD 功能
VCC、VDDA 和栅极驱动 UVLO 保护
具有迟滞功能的热关断保护
进行了优化,可满足超低 EMI 要求
由压摆率控制的自适应栅极驱动器
扩频频谱可降低峰值发射
符合
CISPR 25 5 类
标准
具有可湿性侧面引脚的 VQFNP-40 封装
使用 LM5143-Q1 并借助
WEBENCH® 电源设计器
创建定制设计