ZHCSH35B
November 2017 – May 2021
LM73605-Q1
,
LM73606-Q1
PRODUCTION DATA
1
特性
2
应用
3
说明
4
Revision History
5
Device Comparison
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
Switching Characteristics
7.8
System Characteristics
7.9
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Synchronous Step-Down Regulator
8.3.2
Auto Mode and FPWM Mode
8.3.3
Fixed-Frequency Peak Current-Mode Control
8.3.4
Adjustable Output Voltage
8.3.5
Enable and UVLO
8.3.6
Internal LDO, VCC_UVLO, and BIAS Input
8.3.7
Soft Start and Voltage Tracking
8.3.8
Adjustable Switching Frequency
8.3.9
Frequency Synchronization and Mode Setting
8.3.10
Internal Compensation and CFF
8.3.11
Bootstrap Capacitor and VBOOT-UVLO
8.3.12
Power-Good and Overvoltage Protection
8.3.13
Overcurrent and Short-Circuit Protection
8.3.14
Thermal Shutdown
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
DCM Mode
8.4.3.3
PFM Mode
8.4.3.4
Fault Protection Mode
9
Layout
9.1
Layout Guidelines
9.1.1
Layout For EMI Reduction
9.1.2
Ground Plane
9.1.3
Optimize Thermal Performance
9.2
Layout Example
10
Device and Documentation Support
10.1
Device Support
10.1.1
第三方产品免责声明
10.1.2
Development Support
10.1.2.1
Custom Design With WEBENCH® Tools
10.2
Documentation Support
10.2.1
Related Documentation
10.3
接收文档更新通知
10.4
Receiving Notification of Documentation Updates
10.5
Support Resources
10.6
支持资源
10.7
Trademarks
10.8
Electrostatic Discharge Caution
10.9
Glossary
封装选项
机械数据 (封装 | 引脚)
RNP|30
MPQF448C
散热焊盘机械数据 (封装 | 引脚)
RNP|30
QFND667
订购信息
zhcsh35b_oa
zhcsh35b_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 环境工作温度范围
器件 HBM ESD 分类等级 2kV
器件 CDM ESD 分类等级 C5
可湿侧面 QFN 封装 (WQFN)
低 EMI 和低开关噪声
低静态电流
关断模式下 0.8µA(典型值)
无负载有源模式下
15
µA(典型值)
宽电压转换范围:
t
ON-MIN
=
60
ns(典型值)
t
OFF-MIN
=
70
ns(典型值)
低 MOSFET 导通电阻:
R
DS_ON_HS
= 53mΩ(典型值)
R
DS_ON_LS
= 31mΩ(典型值)
可调频率范围:350kHz 至
2.2
MHz
引脚可选式自动模式或强制 PWM 模式
启动至预偏置负载、固定或可调的软启动时间和跟踪
可同步至外部时钟、内置补偿、电源正常状态标志和精密使能
逐周期电流限制、断续模式、UVLO 和热关断保护
使用
LM73605-Q1
或
LM73606-Q1
并借助
WEBENCH®
Power Designer 创建定制设计方案