ZHCSGG9
June 2017
LM5118-Q1
PRODUCTION DATA.
1
特性
2
应用
3
说明
4
修订历史记录
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
UVLO
7.3.2
Oscillator and Sync Capability
7.3.3
Error Amplifier and PWM Comparator
7.3.4
Ramp Generator
7.3.5
Current Limit
7.3.6
Maximum Duty Cycle
7.3.7
Soft Start
7.3.8
HO Output
7.3.9
Thermal Protection
7.4
Device Functional Modes
7.4.1
Buck Mode Operation: VIN > VOUT
7.4.2
Buck-Boost Mode Operation: VIN ≊ VOUT
7.4.3
High Voltage Start-Up Regulator
7.4.4
Enable
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
R7 = RT
8.2.2.3
Inductor Selection, L1
8.2.2.4
R13 = RSENSE
8.2.2.5
C15 = CRAMP
8.2.2.6
Inductor Current Limit Calculation
8.2.2.7
C9 - C12 = Output Capacitors
8.2.2.8
D1
8.2.2.9
D4
8.2.2.10
C1 - C5 = Input Capacitor
8.2.2.11
C20
8.2.2.12
C8
8.2.2.13
C16 = CSS
8.2.2.14
R8, R9
8.2.2.15
R1, R3, C21
8.2.2.16
R2
8.2.2.17
Snubber
8.2.2.18
Error Amplifier Configuration
8.2.2.18.1
R4, C18, C17
8.2.3
Application Curves
9
Power Supply Recommendations
9.1
Thermal Considerations
9.2
Bias Power Dissipation Reduction
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
器件和文档支持
11.1
器件支持
11.1.1
开发支持
11.1.1.1
使用 WEBENCH® 工具创建定制设计
11.2
商标
11.3
静电放电警告
11.4
Glossary
12
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
PWP|20
MHTS001G
散热焊盘机械数据 (封装 | 引脚)
PWP|20
PPTD289
订购信息
zhcsgg9_oa
4
修订历史记录
日期
修订版本
说明
2017 年 6 月
*
初始发行版。将 SNVS566 中的汽车器件移到了单独的产品说明书中