sc2545 Semtech Corporation, sc2545 Datasheet - Page 21

• Manufacturer Part Number: sc2545
• Description: Sc2545 High Performance Wide Input Range Dual Synchronous Buck Controller
• Manufacturer: Semtech Corporation

© 2005 Semtech Corp.
POWER MANAGEMENT
Typical Characteristics (Cont.)
100%
80%
60%
40%
20%
0%
350
300
250
200
150
100
9
8
7
6
5
4
4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5
50
Efficiency Curve for Vout=3.3V.
0
1
Operating frequency vs. Rosc.
RILIM vs. OCP (Vi=12V).
2
3
Vin=8V
RILIM(KOHM)
4
Rosc(KOHM)
Io(A)
5
6
Vin=16V
7
8
9
10
21
10.13
10.11
10.09
10.07
10.05
10.03
10.5
10.3
10.1
Freq. vs. Temp. ( Rosc=75kohm, Vin=16V).
9.9
9.7
9.5
190
188
186
184
182
180
178
10 12 14 16 18 20 22 24 26 28 30
-40
-40
Vcc vs. Vin ( Ta=25 Degree C).
-20
-10
0
Temperature (Degree C)
Vcc vs. Temp.
20
20
Tj (Degree C)
Vin (V)
40
50
60
80
80
www.semtech.com
SC2545
110
100
120