STW41412/T ST-Ericsson Inc, STW41412/T Datasheet - Page 12

• Manufacturer Part Number: STW41412/T
• Description: IC CONV DC/DC STPDN 16-TFBGA
• Manufacturer: ST-Ericsson Inc
• Type: Step-Down (Buck)r

Specifications of STW41412/T

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 1.3V, 1.8V
• Current - Output: 200mA, 400mA
• Frequency - Switching: 900kHz
• Voltage - Input: 2.7 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

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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