STW4141 datasheet(10/27 Pages) STMICROELECTRONICS

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STW4141 Arkusz danych(PDF) 10 Page - STMicroelectronics

Numer części	STW4141

Szczegółowy opis	Single Coil Dual Output Step Down DC/DC Converter for Digital Base Band and Multimedia Processor Supply

PDF	27 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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10 / 27 page

2 Electrical Characteristics

STw4141

10/27

2.5

Soft start

To avoid spikes on battery during STw4141 start-up sequence, a smooth start-up is

implemented. Reference voltage grows up less than 600 µs until it achieves is final target.

Therefore, STw4141 start up is smooth and secure for the overall mobile phone.

Figure 2.

Smooth start-up sequence VIN = 3.6V, VOUT1 = 1.8V@ 200mA,

VOUT2 =1.2V@400mA

2.6

Settling time of VOUT2

Figure 3.

Settling time of VOUT2, IOUT1 = 200mA, IOUT2 = 400mA

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