ZHCSI37
April 2018
LM25119Q
PRODUCTION DATA.
1
特性
2
应用
3
说明
Device Images
典型应用电路
4
修订历史记录
5
Pin Configuration and Functions
Pin 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
Switching Characteristics
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
High Voltage Start-Up Regulator
7.3.2
UVLO
7.3.3
Enable 2
7.3.4
Oscillator and Sync Capability
7.3.5
Error Amplifiers and PWM Comparators
7.3.6
Ramp Generator
7.3.7
Current Limit
7.3.8
Hiccup Mode Current Limiting
7.3.9
Soft Start
7.3.10
HO and LO Output Drivers
7.3.11
Maximum Duty Cycle
7.3.12
Thermal Protection
7.4
Device Functional Modes
7.4.1
Diode Emulation
8
Application and Implementation
8.1
Application Information
8.1.1
Miscellaneous Functions
8.1.2
Interleaved Two-Phase Operation
8.1.3
Interleaved 4-Phase Operation
8.2
Typical Applications
8.2.1
Dual-output Design Example
8.2.1.1
Design Requirements
8.2.1.1.1
External Components
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Timing Resistor
8.2.1.2.2
Output Inductor
8.2.1.2.3
Current Sense Resistor
8.2.1.2.4
Ramp Resistor and Ramp Capacitor
8.2.1.2.5
Output Capacitors
8.2.1.2.6
Input Capacitors
8.2.1.2.7
VCC Capacitor
8.2.1.2.8
Bootstrap Capacitor
8.2.1.2.9
Soft Start Capacitor
8.2.1.2.10
Restart Capacitor
8.2.1.2.11
Output Voltage Divider
8.2.1.2.12
UVLO Divider
8.2.1.2.13
MOSFET Selection
8.2.1.2.14
MOSFET Snubber
8.2.1.2.15
Error Amplifier Compensation
8.2.1.3
Application Curves
8.2.2
Two-Phase Design Example
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
8.2.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.1.1
Switching Jitter Root Causes and Solutions
10.2
Layout Example
11
器件和文档支持
11.1
社区资源
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)
RTV|32
MPQF166B
散热焊盘机械数据 (封装 | 引脚)
RTV|32
QFND448B
订购信息
zhcsi37_oa
zhcsi37_pm
8.2.1
Dual-output Design Example
Figure 14.
3.3-V 8-A, 1.8-V 8-A Dual-Output Application