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STW41413 bảng dữ liệu(PDF) 3 Page - STMicroelectronics

tên linh kiện STW41413
Giải thích chi tiết về linh kiện  Single Coil Dual Output Step Down DC/DC Converter for Digital Base Band and Multimedia Processor Supply
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STW41413 bảng dữ liệu(HTML) 3 Page - STMicroelectronics

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STw4141
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Contents
1
STw4141 Pinout
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3
DC electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4
Dynamic electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.5
Soft start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.6
Settling time of VOUT2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.7
Line transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.8
Load transients in AUTO mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.9
Load transients in PWM mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.10
Switching between PFM and PWM in FORCED MODE . . . . . . . . . . . . . . . . 13
2.11
Efficiency in PWM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.12
Efficiency in AUTO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.13
Output voltages versus output currents in PWM and PFM . . . . . . . . . . . . . . 16
3
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2
PWM and PFM mode operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3
Current limiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.4
Short circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.5
Thermal shutdown protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1
User mode details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2
Automatic PWM/PFM mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.3
User selected PWM/PFM mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.4
External clock synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5
Checking Transient response versus external components . . . . . . . . . . . . . 20
4.6
Bill of Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.6.1
Inductor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20


Số phần tương tự - STW41413

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