ZHCSJK1G
November 2002 – May 2019
LM2733
PRODUCTION DATA.
1
特性
2
应用
3
说明
Device Images
典型应用电路
效率与负载电流间的关系
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
Switching Frequency
7.4
Device Functional Modes
7.4.1
Shutdown Pin Operation
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
Selecting the External Capacitors
8.2.2.2
Selecting the Output Capacitor
8.2.2.3
Selecting the Input Capacitor
8.2.2.4
Feedforward Compensation
8.2.2.5
Selecting Diodes
8.2.2.6
Setting the Output Voltage
8.2.2.7
Switching Frequency
8.2.2.8
Duty Cycle
8.2.2.9
Inductance Value
8.2.2.10
Maximum Switch Current
8.2.2.11
Calculating Load Current
8.2.2.12
Design Parameters VSW and ISW
8.2.2.13
Thermal Considerations
8.2.2.14
Minimum Inductance
8.2.2.15
Inductor Suppliers
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
器件和文档支持
11.1
商标
11.2
静电放电警告
11.3
Glossary
12
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
DBV|5
MPDS018T
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcsjk1g_oa
zhcsjk1g_pm
6.6
Typical Characteristics
Unless otherwise specified: V
IN
= 5 V,
SHDN
pin is tied to V
IN
.
Figure 1.
Iq V
IN
(Active) vs Temperature - "X"
Figure 3.
Oscillator Frequency vs Temperature - "X"
Figure 5.
Max. Duty Cycle vs Temperature - "X"
Figure 7.
Feedback Voltage vs Temperature
Figure 9.
Current Limit vs Temperature
Figure 11.
Efficiency vs Load Current (V
OUT
= 12 V) - "X"
Figure 13.
Efficiency vs Load Current (V
OUT
= 20 V) - "X"
Figure 15.
Efficiency vs Load Current (V
OUT
= 30 V) - "X"
Figure 17.
Efficiency vs Load Current (V
OUT
= 40 V) - "X"
Figure 19.
Efficiency vs Load (V
OUT
= 20 V) - "Y"
Figure 21.
Efficiency vs Load (V
OUT
= 30 V) - "Y"
Figure 23.
Efficiency vs Load (V
OUT
= 40 V) - "Y"
Figure 2.
Iq V
IN
(Active) vs Temperature - "Y"
Figure 4.
Oscillator Frequency vs Temperature - "Y"
Figure 6.
Max. Duty Cycle vs Temperature - "Y"
Figure 8.
R
DS
(ON) vs Temperature
Figure 10.
R
DS(ON)
vs V
IN
Figure 12.
Efficiency vs Load Current (V
OUT
= 15 V) - "X"
Figure 14.
Efficiency vs Load Current (V
OUT
= 25 V) - "X"
Figure 16.
Efficiency vs Load Current (V
OUT
= 35 V) - "X"
Figure 18.
Efficiency vs Load (V
OUT
= 15 V) - "Y"
Figure 20.
Efficiency vs Load (V
OUT
= 25 V) - "Y"
Figure 22.
Efficiency vs Load (V
OUT
= 35 V) - "Y"
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