ZHCSCO8E
June 2014 – May 2019
TPS65283
,
TPS65283-1
PRODUCTION DATA.
1
特性
2
应用
3
说明
4
典型电路原理图
效率,Vin = 12V,PSM
5
修订历史记录
6
说明 (续)
7
Pin Configuration and Functions
Pin Functions
8
Specifications
8.1
Absolute Maximum Ratings
8.2
Handling Ratings
8.3
Recommended Operating Conditions
8.4
Thermal Information
8.5
Electrical Characteristics
8.6
Typical Characteristics
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Power Switch Detailed Description
9.3.1.1
Overcurrent Condition
9.3.1.2
Reverse Current and Voltage Protection
9.3.1.3
nFAULT Response
9.3.1.4
UVLO
9.3.1.5
Enable and Output Discharge
9.3.1.6
Power Switch Input and Output Capacitance
9.3.1.7
Programming the Current-Limit Threshold
9.3.2
Buck DC-DC Converter Detailed Description
9.3.2.1
Output Voltage
9.3.2.2
Adjustable Switching Frequency
9.3.2.3
Synchronization
9.3.2.4
Error Amplifier
9.3.2.5
Slope Compensation
9.3.2.6
Enable and Adjusting UVLO
9.3.2.7
Internal V7V Regulator
9.3.2.8
Short Circuit Protection
9.3.2.8.1
High-Side MOSFET Overcurrent Protection
9.3.2.8.2
Low-Side MOSFET Overcurrent Protection
9.3.2.9
Bootstrap Voltage (BST) and Low Dropout Operation
9.3.2.10
Output Overvoltage Protection (OVP)
9.3.2.11
Power Good
9.3.2.12
Power-Up Sequencing
9.3.2.13
Thermal Performance
9.4
Device Functional Modes
9.4.1
Operation With VIN < 4.5 V (Minimum VIN)
9.4.2
Operation With EN Control
9.4.3
Operation at Light Loads
10
Application and Implementation
10.1
Application Information
10.2
Typical Application
10.2.1
Design Requirements
10.2.2
Detailed Design Procedure
10.2.2.1
Output Voltage Setting
10.2.2.2
Bootstrap Capacitor Selection
10.2.2.3
Inductor Selection
10.2.2.4
Output Capacitor Selection
10.2.2.5
Input Capacitor Selection
10.2.2.6
Minimum Output Voltage
10.2.2.7
Compensation Component Selection
10.2.3
Application Curves
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.1.1
PCB Layout Recommendation
12.1.2
Power Dissipation and Junction Temperature
12.2
Layout Example
13
器件和文档支持
13.1
文档支持
13.1.1
相关链接
13.2
商标
13.3
静电放电警告
13.4
Glossary
14
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
RGE|24
MPQF124G
散热焊盘机械数据 (封装 | 引脚)
RGE|24
QFND008AA
订购信息
zhcsco8e_oa
zhcsco8e_pm
1
特性
降压转换器
4.5V 至 18V 宽输入电压范围
集成双路降压转换器,最大持续电流为 3.5A (Buck1)/2.5A (Buck2)
反馈基准电压为 0.6V ±1%
可调节开关频率范围:200kHz 至
2MHz
内置软启动时间 2.4ms
外部时钟同步
逐周期电流限制
适用于每种降压模式的电源正常状态指示器
在轻负载条件下以持续电流模式 (TPS65283) 或脉冲跳跃模式 (PSM) (TPS65283-1) 运行
配电开关
集成导通电阻为 60mΩ 的配电开关
工作输入电压范围为 2.4V 至 6V
可调电流限制高达 2.7A
在 1.25A(典型值)时电流限制精度为 ±10%
自动恢复过流保护
反向输入至输出电压保护
过热保护
24 引脚 VQFN (RGE) 4mm × 4mm 封装