Datasheet

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SLUS564C − JULY 2003 − REVISED OCTOBER 2008
19
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APPLICATION INFORMATION
2.5V_OUT
1
2
3
4
5
6
7
8
9
10
11
12
TPS51020
COMP2
SSTRT2
PGOOD
VO2
ENBL2
ENBL1
REF_X
GND
DDR
VO1_VDDQ
SSTRT1
COMP1
17
16
20
19
18
REG5_IN
VREG5
VBST2
OUT2_U
LL2
23
22
21
26
25
24
29
28
27
30
OUT2_D
OUTGND2
TRIP2
VIN
TRIP1
OUTGND1
OUT1_D
LL1
OUT1_U
VBST1
13
14
15
INV2
INV1
SKIP
1.25V_OUT
GND
GND
GND
GND
GND
(VO1_VDDQ/2_REF)
R04
R01
4.7k
R03
3.9k
C12
4700p
R02
1.2k
C14
4700p
C15
0.01u
C19
0.01u
C20
6800p
R08
3.9k
7.62k
R11
19.7k
R10
1.2k
2200p
C22
R101
100k
100k
R102
R07
100k
C11
0.1u
0.1u
C08
R12
15
Q01
Q02
R13
18k
18k
R14
Q04
Q03
R15
15
L02
C05a
5.6u
150u
C05c
0.01u
C13
4.7u
C04a
150u
C04c
0.01u
L01
5.6u
C01a
22u
C02
2.2ux2
C04d
150u
150u
C05b
C04b
150u
(EXT_5V)
GND
2.5V_OUT
C01a : Sanyo 35SVPD22M
C01c, C02, C27 : Taiyo Yuden GMK325BJ225MH−B
C04a, C05a, C04b, C05b,C04d : Panasonic EEFUE0J151R
Q01, Q03 : Fairchild FDS6612A
Q02, Q04 : Fairchild FDS6690S
L01, L02 : Sumida CEP125−5R6MC−H
R16
0
2.2u
0
C01cC27
VBAT
8 V to 20 V
Figure 7. Typical Application Circuit: DDR (2.5V/6A + 1.25V/3A) Cascade