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SC2620 датащи(PDF) 23 Page - Semtech Corporation

номер детали SC2620
подробное описание детали  Dual 2A, 30V Step-down Regulator with Programmable Frequency up to 1.4MHz
PDF  26 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC2620 датащи(HTML) 23 Page - Semtech Corporation

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 2006 Semtech Corp.
www.semtech.com
SC2620
POWER MANAGEMENT
C15
10
µF
SC2620
GND
SS2
PVIN
SW1
FB2
COMP2
R7
9.76k
BOOST1
C1
10
µF
BOOST2
SW2
L1
1.8
µH
C2
0.1
µF
L2
1.8
µH
C4
0.1
µF
SS1
PGOOD1
COMP1
FB1
C3
22
µF
D1
10BQ015
D2
10BQ015
OUT1
1.2V/2A
R3
24.9k
10.7k
R2
R1
2.15k
C7
22nF
C10
22nF
ROSC
R9
15.0k
C8
390pF
R5
15.8k
C5
390pF
D4
1N4148
L1 & L2: Wurth 744 062 0018
OUT2
3.3V/2A
D3
1N4148
5V VIN
C9
10pF
10.7k
R4
C3: Murata GRM21BR60J 226M
C1 & C15: Murata GRM21BR60J106K
VIN
10
R10
C16
0.1
µF
Figure 16(a). 1.2MHz 5V to 3.3V and 1.2V xDSL Power
Supply. Channel 2 does not start until
Channel 1 output voltage becomes regu-
lated.
Typical Application Circuits
Efficiency
50
55
60
65
70
75
80
85
90
95
00.5
11.5
2
Load Current (A)
VOUT1 = 3.3V
VOUT2 = 1.2V
VIN = 5V
Figures 16(b) and 16(c). Load Transient Response. I
OUT is switched between 0.3A and 2A.
40
µs/div
Upper Trace : OUT1 Voltage, AC Coupled, 0.5V/div
Lower Trace : L
1 Inductor Current, 0.5A/div
(b)
40
µs/div
Upper Trace : OUT2 Voltage, AC Coupled, 0.2V/div
Lower Trace : L
2 Inductor Current, 0.5A/div
(c)
OUT2
OUT1



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