sc2542 Semtech Corporation, sc2542 Datasheet - Page 24

• Manufacturer Part Number: sc2542
• Description: Sc2542 High Performance Wide Input Rangedual Synchronous Buck Controller
• Manufacturer: Semtech Corporation

Over current protection (5A/10mV)
Efficiency curve for Vout = 3.3V
Efficiency curve for SPWM Mode vs. SKIP Mode
© 2005 Semtech Corp.
POWER MANAGEMENT
Typical Characteristics (Cont.)
100%
100.00%
80.00%
60.00%
40.00%
20.00%
80%
60%
40%
20%
0.00%
0%
10
0
1
2
100
3
Io(m A)
V in= 8V
4
Io( A )
5
1000
6
V in= 16V
7
10000
8
CH1: TG
CH2: BG
CH3: IL
CH4: Vo
9
skip m ode
Synchroniz e
10
24
Operating frequency vs. Rosc
RILIM vs. OCP (Vin = 12V)
3 50
3 00
2 50
2 00
1 50
1 00
9
8
7
6
5
4
50
4.5
5 .0
5 .5
6 .0
6 .5
RI L IM (K O H M)
Ro s c( K OHM)
7 .0
7 .5
8 .0
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SC2542
8 .5
9.0
9 .5