ZHCSB48B
May 2013 – January 2019
TPS55330
PRODUCTION DATA.
1
特性
2
应用
3
说明
Device Images
典型应用(升压)
效率与输出电流间的关系
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
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Operation
7.3.2
Switching Frequency
7.3.3
Overcurrent Protection and Frequency Foldback
7.3.3.1
Minimum On-Time and Pulse Skipping
7.3.4
Voltage Reference and Setting Output Voltage
7.3.5
Soft-Start
7.3.6
Slope Compensation
7.3.7
Enable and Thermal Shutdown
7.3.8
Undervoltage Lockout (UVLO)
7.4
Device Functional Modes
7.4.1
Operation With VI < 2.9 V (Minimum VI)
7.4.2
Operation With EN Control
7.4.3
Operation at Light Loads
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Custom Design With WEBENCH® Tools
8.2.2.2
Selecting the Switching Frequency (R4)
8.2.2.3
Determining the Duty Cycle
8.2.2.4
Selecting the Inductor (L1)
8.2.2.5
Computing the Maximum Output Current
8.2.2.6
Selecting the Output Capacitor (C8-C10)
8.2.2.7
Selecting the Input Capacitors (C2, C7)
8.2.2.8
Setting Output Voltage (R1, R2)
8.2.2.9
Setting the Soft-start Time (C7)
8.2.2.10
Selecting the Schottky Diode (D1)
8.2.2.11
Compensating the Control Loop (R3, C4, C5)
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.3
Thermal Considerations
11
器件和文档支持
11.1
器件支持
11.1.1
第三方产品免责声明
11.1.2
开发支持
11.1.2.1
使用 WEBENCH® 工具创建定制设计
11.2
接收文档更新通知
11.3
社区资源
11.4
商标
11.5
静电放电警告
11.6
术语表
12
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
RTE|16
MPQF149D
散热焊盘机械数据 (封装 | 引脚)
RTE|16
QFND525B
订购信息
zhcsb48b_oa
zhcsb48b_pm
6.6
Typical Characteristics
V
IN
= 5 V, T
A
= 25°C (unless otherwise noted)
Figure 1.
Error Amplifier Transconductance vs Temperature
Figure 3.
Feedback Voltage Reference vs Temperature
Figure 5.
Frequency vs FREQ Resistance
T
A
= 25°C
Figure 7.
Minimum Switching Frequency for Quick Recovery from Frequency Foldback
Figure 9.
COMP Clamp Voltage vs Temperature
Figure 11.
Enable Voltage vs Temperature
Figure 13.
Minimum On Time vs Temperature
Figure 15.
Supply Current vs Temperature
Figure 2.
Switch Current Limit vs Temperature
Figure 4.
R
DS(ON)
vs Temperature
Figure 6.
Frequency vs Temperature
Figure 8.
Non-Foldback Frequency vs Foldback Frequency
Figure 10.
Input Voltage UVLO vs Temperature
Figure 12.
Maximum Duty Cycle vs Temperature
Figure 14.
Shutdown Current vs Temperature