SC475A Datasheet, PDF (22/27 Pages) Semtech Corporation – Synchronous Buck Controller with Dual-Level VOUT Transition Support

SC475A
POWER MANAGEMENT
Typical Characteristics
2600
2400
2200
2000
1800
1600
1400
1200
1000
800
600
400
200
5
TON vs. VBAT - VOUT > 2.5V
3.3V
5V
2.5V
10
15
VBAT (V)
TON vs. VBAT - VOUT < 1.8V
1000
900
800
700
600
1.1V
1.8V
1.5V
500
400
300
200
0.75V
100
20
5
10
15
20
VBAT (V)
Frequency vs. BAT
400
390
380
1.8V ^1.5V
370
1.25V
360
350
340
330
1.1V
320
1.0V
310
0.9V
0.75V
300
5
7
9
11
13
15
17
19
21
23
VBAT (V)
Efficiency vs. Load - VOUT = 1.15V
95%
10V
90%
85%
15V
19V
80%
75%
0
2
4
6
8 10 12 14 16 18 20
Load (A)
Load Regulation
1.18
1.17
19V
1.16
1.15
1.14
10V
15V
1.13
1.12
0
2
4
6
© 2006 Semtech Corp.
8 10 12 14 16 18 20
Load (A)
22
Line Regulation
1.18
3A
1.17
No Load
1.16
1.15
1.14
10A
15A
1.13
1.12
10
12
14
16
18
VBAT (V)
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