STW4141 STMicroelectronics, STW4141 Datasheet - Page 11

• Manufacturer Part Number: STW4141
• Description: Single Coil Dual Output Step Down Dc/dc Converter For Digital Base Band And Multimedia Processor Supply
• Manufacturer: STMicroelectronics

STw4141
2.5
2.6
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
V
Figure 2.
Settling time of V
Figure 3.
OUT2
=1.2V@400mA.
illustrates a smooth start up sequence where V
Smooth start-up sequence
Settling time of V
OUT2
OUT2,
I
OUT1
= 200mA, I
OUT2
IN
= 3.6V, V
= 400mA
Electrical characteristics
OUT1
= 1.8V@ 200mA,
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