STW4141 datasheet(10/27 Pages) STMICROELECTRONICS

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STW4141 Scheda tecnica(PDF) 10 Page - STMicroelectronics

Il numero della parte	STW4141

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

PDF	27 Pages

Scroll/Zoom	100%

Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	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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