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器件3D模型￥ 8.462
LM46002QPWPRQ1 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
开关控制器
封装:
HTSSOP-16
描述:
开关稳压器 Automotive Qualified 3.5V to 60V, 2A Synchronous Step-Down Voltage Converter 16-HTSSOP -40 to 125
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P3Hot
典型应用电路图在P15
原理图在P1P13
封装尺寸在P21P22P23P24P26P27P28
标记信息在P21P22P23P24P25
封装信息在P20P21P22P23P24P25P26P27P28
技术参数、封装参数在P4P18
应用领域在P1
电气规格在P4P5P6P7P8P18
导航目录
LM46002QPWPRQ1数据手册
Page:
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V
IN
Unregulated Input
V
OUT
Regulated Output
C1*
0.47 µF
C
OUT
**
22 µF
LM2940
I
Q
+
IN
OUT
LM2940-N
,
LM2940C
www.ti.com
SNVS769J –MARCH 2000–REVISED DECEMBER 2014
8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The LM2940-N and LM2940C positive voltage regulators feature the ability to source 1 A of output current with a
dropout voltage of typically 0.5 V and a maximum of 1 V over the entire temperature range. The output capacitor,
C
OUT
, must have a capacitance value of at least 22 µF with an ESR of at least 100 mΩ, but no more than 1 Ω.
The minimum capacitance value and the ESR requirements apply across the entire expected operating ambient
temperature range.
8.2 Typical Application
*Required if regulator is located far from power supply filter.
**C
OUT
must be at least 22 μF to maintain stability. May be increased without bound to maintain regulation during
transients. Locate as close as possible to the regulator. This capacitor must be rated over the same operating
temperature range as the regulator and the ESR is critical; see curve.
Figure 26. Typical Application
8.2.1 Design Requirements
Table 1. Design Parameters
DESIGN PARAMETER EXAMPLE VALUE
Input voltage range 6 V to 26 V
Output voltage range 8 V
Output current range 5 mA to 1 A
Input capacitor value 0.47 µF
Output capacitor value 22 µF minimum
Output capacitor ESR range 100 mΩ to 1 Ω
8.2.2 Detailed Design Procedure
8.2.2.1 External Capacitors
The output capacitor is critical to maintaining regulator stability, and must meet the required conditions for both
equivalent series resistance (ESR) and minimum amount of capacitance.
8.2.2.1.1 Minimum Capacitance
The minimum output capacitance required to maintain stability is 22 μF (this value may be increased without
limit). Larger values of output capacitance will give improved transient response.
Copyright © 2000–2014, Texas Instruments Incorporated Submit Documentation Feedback 15
Product Folder Links: LM2940-N LM2940C
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