ZHCSTR3B
December 2010 – November 2023
TPS53315
PRODUCTION DATA
1
1
特性
2
应用
3
说明
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
Typical Characteristics
6
Detailed Description
6.1
Overview
6.2
Functional Block Diagram
6.3
Feature Description
6.3.1
D-CAP™ Integrated Circuit with Adaptive On-Time
6.3.2
Small Signal Model
6.3.3
Ramp Signal
6.3.4
Auto-Skip Eco-mode Light Load Operation
6.3.5
Adaptive Zero Crossing
6.3.6
Forced Continuous Conduction Mode
6.3.7
Power Good
6.3.8
Current Sense and Overcurrent Protection
6.3.9
Overvoltage and Undervoltage Protection
6.3.10
UVLO Protection
6.3.11
Thermal Shutdown
6.4
Device Functional Modes
6.4.1
Enable and Soft Start
7
Application and Implementation
7.1
Application Information
7.2
Typical Application
7.2.1
Typical Application Circuit Diagram
7.2.1.1
Design Requirements
7.2.1.2
Detailed Design Procedure
7.2.1.2.1
Step 1: Select Operation Mode and Soft-Start Time
7.2.1.2.2
Step 2: Select Switching Frequency
7.2.1.2.3
Step 3: Select the Inductance
7.2.1.2.4
Step 4: Select Output Capacitors
7.2.1.2.5
Step 5: Determine the Voltage-Divider Resistance (R1 and R2)
7.2.1.2.6
Step 6: Select the Overcurrent Resistance (RTRIP)
7.2.1.3
Application Curves
7.2.2
Typical Application Circuit Diagram With Ceramic Output Capacitors
7.2.2.1
Design Requirements
7.2.2.2
Detailed Design Procedure
7.2.2.2.1
Step 1: Select Operation Mode and Soft-Start Time
7.2.2.2.2
Step 2: Select Switching Frequency
7.2.2.2.3
Step 3: Select the Inductance
7.2.2.2.4
Step 4: Select Output Capacitance for Ceramic Capacitors
7.2.2.2.5
Step 5: Select the Overcurrent Setting Resistance (RTRIP)
7.2.2.3
External Component Selection When Using All Ceramic Output Capacitors
7.2.2.4
Application Curves
7.3
Power Supply Recommendations
7.4
Layout
7.4.1
Layout Guidelines
7.4.2
Layout Example
7.4.2.1
Thermal Considerations
8
Device and Documentation Support
8.1
接收文档更新通知
8.2
支持资源
8.3
Trademarks
8.4
静电放电警告
8.5
术语表
9
Revision History
10
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
RGF|40
MPQF173F
散热焊盘机械数据 (封装 | 引脚)
RGF|40
QFND162J
订购信息
zhcstr3b_oa
zhcstr3b_pm
1
特性
转换输入电压范围:3V 至 15V
VDD 输入电压范围:4.5V 至 25V
输出电压范围:0.6V 至 5.5V
5V LDO 输出
具有 12A 持续输出电流的集成功率 MOSFET
关断电流 < 10μA
用于在轻负载时实现高效率的自动跳跃 Eco-mode
具有快速瞬态响应的 D-CAP 集成电路
借助外部电阻器实现的 250kHz 至 1MHz 可选开关频率
内置 1% 0.6V 基准
0.7ms、1.4ms、2.8ms 和 5.6ms 可选内部电压伺服器软启动
预充电启动能力
集成升压开关
通过外部电阻器实现的可调节过流限制
过压、欠压、UVLO 和过热保护
支持所有陶瓷输出电容器
开漏电源正常状态指示
带有散热焊盘的 40 引脚 VQFN 封装
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