ZHCSN39A
February 2020 – November 2021
LM61480
,
LM61495
,
LM62460
PRODUCTION DATA
1
特性
2
应用
3
说明
4
Revision History
5
Device Comparison Table
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
Output Voltage Selection
8.3.2
Enable EN Pin and Use as VIN UVLO
8.3.3
SYNC/MODE Uses for Synchronization
8.3.4
Clock Locking
8.3.5
Adjustable Switching Frequency
8.3.6
RESET Output Operation
8.3.7
Internal LDO, VCC UVLO, and BIAS Input
8.3.8
Bootstrap Voltage and VCBOOT-UVLO (CBOOT Pin)
8.3.9
Adjustable SW Node Slew Rate
8.3.10
Spread Spectrum
8.3.11
Soft Start and Recovery From Dropout
8.3.12
Overcurrent and Short Circuit Protection
8.3.13
Hiccup
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
Peak Current Mode Operation
8.4.3.2
Auto Mode Operation
8.4.3.2.1
Diode Emulation
8.4.3.3
FPWM Mode Operation
8.4.3.4
Minimum On-time (High Input Voltage) Operation
8.4.3.5
Dropout
8.4.3.6
Recovery from Dropout
8.4.3.7
Other Fault Modes
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Choosing the Switching Frequency
9.2.2.2
Setting the Output Voltage
9.2.2.3
Inductor Selection
9.2.2.4
Output Capacitor Selection
9.2.2.5
Input Capacitor Selection
9.2.2.6
BOOT Capacitor
9.2.2.7
BOOT Resistor
9.2.2.8
VCC
9.2.2.9
CFF and RFF Selection
9.2.2.10
RSPSP Selection
9.2.2.11
RT Selection
9.2.2.12
RMODE Selection
9.2.2.13
External UVLO
9.2.2.14
Maximum Ambient Temperature
9.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.1.1
Ground and Thermal Considerations
11.2
Layout Example
12
Device and Documentation Support
12.1
Device Support
12.1.1
第三方产品免责声明
12.2
接收文档更新通知
12.3
支持资源
12.4
Trademarks
12.5
术语表
12.6
Electrostatic Discharge Caution
13
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
RPH|16
MPQF527A
散热焊盘机械数据 (封装 | 引脚)
RPH|16
QFND684
订购信息
zhcsn39a_oa
1
特性
提供功能安全
可帮助进行功能安全系统设计的文档
输入电压范围:3V 至 36V
具有滤波器和延迟释放的
RESET
输出
可实现低 EMI:
符合 CISPR 11/32 B 类要求的 EVM
引脚可配置扩频
可调节的 SW 节点上升时间
高于和低于 AM 频带运行:引脚可配置为固定 400kHz 和 2.2MHz,或可在 200kHz 至 2.2MHz 之间调节
低 EMI 对称引脚排列
对于恒定频率或脉冲频率调制 (PFM),轻负载模式下可对引脚进行配置
高效解决方案
8A 负载可实现 95% 的效率
在自动模式下空载时具有 5µA 的输入电流
<1µA 关断电流(典型值)
高功率密度
内置补偿、软启动、电流限制、热关断和 UVLO
4.5mm × 3.5mm 可湿性侧面 QFN 封装