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SC2603SKTRT

P1-P3P4-P6P7-P9P10-P11
7
2005 Semtech Corp.
www.semtech.com
SC2603
POWER MANAGEMENT
Applications Information (Cont.)
Layout diagram for the SC2603
Vout
12VIN
+
Cout
2.2
0.1uF
Q1
0.1uF
D1
SC2603
GND
1
VIN
5
3
CS
6
Gate
2
FB
4
Rb
Ra
Rs
EN/SS
20uH
Cin
Heavy lines indicate the critical loop carrying high pulsating current.
The inductance of this loop needs to be minimized.
82005 Semtech Corp.
www.semtech.com
SC2603
POWER MANAGEMENT
Applications Circuit
12V to 25V @ 1A boost converter
R2
34K
R4
1.78K
L1
18uH
Q1
AO4442
D1
3A, 40V
C2
330u/35V
C1
470u
R5
1K
VIN = 12V
VOUT=25V
U2
SC2603
VIN
5
EN/SS
3
FB
1
GND
2
CS
6
Gate
4
C11
1u
R1
2.2
C4
0.1u
Enable
C3
1u
R6
20m
C5
120p
(open drain)
R2
34K
R4
1.78K
L1
18uH
Q1
AO4442
D1
3A, 40V
C2
330u/35V
C1
470u
R5
1K
VIN = 12V
VOUT=25V
U2
SC2603
VIN
5
EN/SS
3
FB
1
GND
2
CS
6
Gate
4
C11
1u
R1
2.2
C4
0.1u
Enable
C3
1u
R6
20m
C5
120p
(open drain)
Bill of Material
Open Drain with < 100Ω
pull down impedance
SEMTECHSOT23-6SC2603U1116
20mR6115
6031KR5114
6031.78KR4113
6030R3112
60334KR2111
6032.2R1110
Alpha & OmegaAO4442Q119
COOPER18uHL118
1N5819D117
8051uC1116
603120pC515
6030.1uC414
6031uFC313
SANYO330u/AlumC212
SANYO470u/AlumC111
VendorfootprintPartReferenceQuantityItem
SEMTECHSOT23-6SC2603U1116
20mR6115
6031KR5114
6031.78KR4113
6030R3112
60334KR2111
6032.2R1110
Alpha & OmegaAO4442Q119
COOPER18uHL118
1N5819D117
8051uC1116
603120pC515
6030.1uC414
6031uFC313
SANYO330u/AlumC212
SANYO470u/AlumC111
VendorfootprintPartReferenceQuantityItem
9
2005 Semtech Corp.
www.semtech.com
SC2603
POWER MANAGEMENT
Error Amplifier: Gain and Phase
Typical Characteristics
Load Regulation (V
IN
= 12V, V
O
= 25V)
Line Regulation (V
O
= 25V, I
O
= 1A)
Efficiency (V
IN
= 12V, V
O
= 25V)
OCP (V
IN
= 12V, V
O
= 25V)
-10
-5
0
5
10
15
20
25
30
35
40
100.0E+0 1.0E+3 10.0E+3 100.0E+3 1.0E+6 10.0E+6
Frequency (Hz)
Gain (dB)
-45
0
45
90
135
180
Phase (deg)
Gain
Phase
23.000
23.500
24.000
24.500
25.000
25.500
26.000
4 6 8 10 12 14 16
Input Voltage - (V)
Output Voltage - (V)
23
23.5
24
24.5
25
25.5
26
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1
Output Current - (A)
Output Voltage - (V)
80
82
84
86
88
90
92
94
96
98
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1
Output Current - (A)
Efficiency - (%)
24.2
24.4
24.6
24.8
25
25.2
25.4
25.6
0 0.5 1 1.5 2 2.5 3
Output Current - (A)
Output Voltage - (A)
Frequency Shift (V
FB
vs. F
SW
)
P1-P3P4-P6P7-P9P10-P11

SC2603SKTRT

Mfr. #:
Buy SC2603SKTRT
Manufacturer:
Semtech
Description:
Switching Controllers SWITCHING REGULATOR
Lifecycle:
New from this manufacturer.
Delivery:
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