STW41411/T ST-Ericsson Inc, STW41411/T Datasheet - Page 17
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STW41411/T
Manufacturer Part Number
STW41411/T
Description
IC CONV DC/DC STPDN 16-TFBGA
Manufacturer
ST-Ericsson Inc
Type
Step-Down (Buck)r
Datasheet
1.STW41411.pdf
(31 pages)
Specifications of STW41411/T
Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
2
Voltage - Output
1.2V, 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
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
STW41411/T
Manufacturer:
SANYO
Quantity:
1 000
Part Number:
STW41411/T
Manufacturer:
ST-ERICSSON
Quantity:
20 000
Electrical characteristics
2.12
Figure 10. Switching regulator efficiency in auto mode
16/30
Efficiency VS output currents I
I
OUT1
180
150
(mA)
120
Efficiency VS I
Efficiency VS I
100
100
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
90
0
1
1
Efficiency in AUTO
The efficiency of a switching regulator is equal to the total output power divided by the input.
STw4141 has high efficiency up to 92% (both outputs) and always higher than 70% for
output currents higher than 1mA.
60
V
V
V
V
V
V
IN
OUT1
OUT2
IN
OUT1
OUT2
30
= 2.7V
= 2.7V
= 1.8V
= 1.2V
= 1.8V
= 1.2V
1
OUT1
OUT2
OUT1
10
10
@I
@I
OUT2
I
OUT1
I
OUT2
and I
OUT1
(mA)
(mA)
, AUTO mode, T
, AUTO mode, T
OUT2
I
OUT2
100
(mA)
100
, V
IN
= 2.7V, AUTO mode
0
10
I
I
20
30
I
I
I
I
OUT1
OUT1
40
OUT2
OUT2
OUT2
OUT1
50
60
70
80
90
100
= 100 mA
= 200 mA
= 0 mA
= 200 mA
= 400 mA
= 0 mA
Efficiency (%)
A
A
90-100
80-90
70-80
60-70
50-60
40-50
30-40
20-30
10-20
0-10
= 25°C
= 25°C
1000
1000
Efficiency VS output currents I
200
I
OUT1
160
(mA)
Efficiency VS IOUT1@I
120
100
Efficiency VS I
90
80
70
60
50
40
30
20
10
100
0
90
80
70
60
50
40
30
20
10
0
80
1
1
V
V
V
V
V
V
IN
OUT1
OUT2
40
IN
OUT1
OUT2
= 3.6V
= 3.6V
= 1.8V
= 1.2V
= 1.8V
= 1.2V
1
OUT2
10
OUT1
10
@I
I
OUT1
OUT2
OUT1
I
OUT2
and I
(mA)
(mA)
, AUTO mode, T
, AUTO mode, T
OUT2
I
OUT2
100
100
(mA)
, V
IN
= 3.6V, AUTO mode
I
I
I
0
10
OUT2
OUT2
OUT2
20
30
40
I
I
50
I
OUT1
OUT1
60
70
OUT1
80
90
100
= 0 mA
= 200 mA
= 400 mA
= 100 mA
= 200 mA
= 0 mA
Efficiency (%)
A
A
= 25°C
= 25°C
90-100
80-90
70-80
60-70
50-60
40-50
30-40
20-30
10-20
0-10
1000
1000
STw4141