Datasheet

L1
5
µ
H
Sumida
CDRH6D38−5R0
IN3
OUT3
FB1
FB2
20
1
11
10
DGND
SS3 AGND EN1 SS1 DGND SW1 IN1 IS1
19 18 17 16 15 14 13 12
FB3
EN3 EN2
SS2
DGND
SW2
IN2
IS2
2 3 4 5 6 7 8 9
R3
61.9k
Ω
R4
15.4k
Ω
EN3
EN2
V
IN
EN1
V
IN
1.5nF
1.5nF
0.01
µ
F
R1
33m
Ω
10pF
100
µ
F
Tantalum
100
µ
F
Tantalum
Siliconix
Si2323DS
Siliconix
Si2323DS
Q2
L2
15
µ
H
Sumida
CDRH8D43−150
V
CCINT
1.2V, 2A
Vishay
SS32
D2
0.1
µ
F
1
µ
F
V
CCAUX
2.5V, 300mA
10
µ
F
0.1
µ
F
R5
61.9k
Ω
ON Semiconductor
MBRM120
R6
36.5k
Ω
V
CCO
3.3V, 2A
R2
33m
Ω
100
µ
F
V
IN
Q1
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
I
OUT
(A)
V
IN
= 3.3V
V
OUT
= 1.2V
T
A
= +85
_
C
T
A
=
−
40
_
C
T
A
= +25
_
C
5
4
3
2
1
0
−
1
−
2
−
3
−
4
−
5
∆ V
OUT
(%)
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
I
OUT
(A)
V
IN
= 5V
V
OUT
= 3.3V
5
4
3
2
1
0
−
1
−
2
−
3
−
4
−
5
∆
V
OUT
(%)
T
A
= +85
_
C
T
A
=
−
40
_
C
T
A
= +25
_
C
TPS75003
www.ti.com SBVS052I –OCTOBER 2004–REVISED AUGUST 2010
Typical Application Circuit for Powering the Xilinx Spartan-3 FPGA
Figure 1.
TYPICAL CHARACTERISTICS
Measured using circuit in Figure 1.
Buck Converter
BUCK LOAD REGULATION BUCK LOAD REGULATION
Figure 2. Figure 3.
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