ZHCS979F
June 2012 – October 2020
TPS53318
,
TPS53319
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
Typical Characteristics
7.7
TPS53319 Typical Characteristics
7.8
TPS53318 Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
5-V LDO and VREG Start-Up
8.3.2
Adaptive On-Time D-CAP Control and Frequency Selection
8.3.3
Ramp Signal
8.3.4
Adaptive Zero Crossing
8.3.5
Output Discharge Control
8.3.6
Power-Good
8.3.7
Current Sense, Overcurrent, and Short Circuit Protection
8.3.8
Overvoltage and Undervoltage Protection
8.3.9
Redundant Overvoltage Protection (OVP)
8.3.10
UVLO Protection
8.3.11
Thermal Shutdown
8.3.12
Small Signal Model
8.3.13
External Component Selection Using All Ceramic Output Capacitors
8.4
Device Functional Modes
8.4.1
Enable, Soft Start, and Mode Selection
8.4.2
Auto-Skip Eco-mode Light Load Operation
8.4.3
Forced Continuous Conduction Mode
9
Application and Implementation
9.1
Application Information
9.2
Typical Applications
9.2.1
Application Using Bulk Output Capacitors, Redundant Overvoltage Protection Function (OVP) Disabled
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.2.1
Step One: Select Operation Mode and Soft-Start Time
9.2.1.2.2
Step Two: Select Switching Frequency
9.2.1.2.3
Step Three: Choose the Inductor
9.2.1.2.4
Step Four: Choose the Output Capacitor or Capacitors
9.2.1.2.5
Step Five: Determine the Value of R1 and R2
9.2.1.2.6
Step Six: Choose the Overcurrent Setting Resistor
9.2.1.3
Application Curves
9.2.2
Application Using Ceramic Output Capacitors, Redundant Overvoltage Protection Function (OVP) Enabled
9.2.2.1
Design Requirements
9.2.2.2
Detailed Design Procedure
9.2.2.2.1
External Component Selection Using All Ceramic Output Capacitors
9.2.2.2.2
Redundant Overvoltage Protection
9.2.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Device Support
12.1.1
Development Support
12.2
Receiving Notification of Documentation Updates
12.3
Support Resources
12.4
Trademarks
12.5
Electrostatic Discharge Caution
12.6
Glossary
13
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
DQP|22
MPSS023D
散热焊盘机械数据 (封装 | 引脚)
DQP|22
QFND267C
订购信息
zhcs979f_oa
zhcs979f_pm
1
特性
转换输入电压范围:1.5V 至 22V
VDD 输入电压范围:4.5V 至 25V
在电压为 12V 至 1.5V 且电流为 14A 时效率达 91%
输出电压范围:0.6V 至 5.5V
5V LDO 输出
支持单轨输入
集成功率 MOSFET,持续输出电流达 8A (TPS53318) 或 14A (TPS53319)
自动跳跃
Eco-mode™
可提高轻负载效率
关断电流 < 110μA
D-CAP™
模式可提供快速瞬态响应
可借助外部电阻器在 250kHz 至 1MHz 之间选择开关频率
可选自动跳跃或仅 PWM 工作模式
内置 1% 0.6V 基准电压
0.7ms、1.4ms、2.8ms 和 5.6ms 可选内部电压伺服器软启动
集成升压开关
预充电启动功能
具有热补偿的可调过流限制
过压、欠压、UVLO 和过热保护
支持所有陶瓷输出电容器
漏极开路电源正常状态指示
整合
NexFET™
电源块技术
采用
PowerPAD™
的 22 引脚 QFN (DQP) 封装
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