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SC2620 датащи(PDF) 24 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) 24 Page - Semtech Corporation

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 2006 Semtech Corp.
www.semtech.com
SC2620
POWER MANAGEMENT
Typical Application Circuits
500kHz 12V to 5V and 0.8V step-down converter. Notice that V
OUT2 is lower than the nominal
FB voltage. R
11 and R12 constitute the feedback voltage divider for Channel 2.
Figure 17(a).
C15
10
µF
SC2620
GND
SS2
PVIN
SW1
FB2
COMP2
R7
8.25k
BOOST1
C1
22
µF
BOOST2
SW2
L1
15
µH
C2
0.1
µF
L2
4.7
µH
C4
0.1
µF
SS1
PGOOD1
COMP1
FB1
C3
47
µF
D1
UPS120
D2
UPS120
OUT1
0.8V/2A
R3
60.4k
15.0k
R2
R1
8.06k
C7
47nF
C10
22nF
ROSC
R9
51.1k
C8
1nF
R5
15.4k
C5
1nF
D4
1N4148
L1 : Coiltronics DR74
OUT2
5V/2A
D3
1N4148
C6
47pF
C1: Murata GRM21BR60J 226M
VIN
10
R10
12V
C16
0.1
µF
4.02k
R12
80.6k
R11
L2 : Coiltronics DR73
C12
47pF
C11
47pF
C3: Murata GRM31CR60J476M
C15: Murata GRM32DR61E106K
C9
22pF
Figure 17(b). V
IN Start-up Transient (IOUT1 = IOUT2 = 1.5A).
4ms/div
CH1 : V
IN, 5V/div
CH4 : SS2 Voltage, 2V/div
CH2 : OUT1 Voltage, 2V/div
CH3 : OUT2 Voltage, 0.5V/div
CH 1
CH 2
CH 3
CH 4
Figure 17(c). Channel 2 Output Short-circuit Hiccup.
10ms/div
Upper Trace : OUT2 Voltage, 0.1V/div
Middle Trace : SS2 Voltage, 1V/div
Lower Trace : I
L2, 2A/div



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