Datasheet

18
LTC1530
1530fa
5V to 1.9V-3.3V Synchronous Buck Converter
PV
CC
Is Generated from Charge Pump
+
+
0.1µF
0.22µF
10µF
+
C
O
(SEE
TABLE)
C
IN
**
L
O
†
20Ω
2.7k
PV
CC
GND
LTC1530
(SEE TABLE)
G1
1
5
2
4
8
6
7
3
COMP
I
FB
I
MAX
G2
V
OUT
1530 TA02
V
IN
5V
* SILICONIX SUD50N03-10
** 3× SANYO 10MV1200GX OR
3× SANYO OS-CON 6SH330K
R
C
C
C
Q1*
Q2*
C1
†
COILTRONICS CTX02-13198 (2µH) OR
PANASONIC ETQP6F2R5HA PCC-N6 (2.5µH)
(SEE TABLE)
V
OUT
1.9V TO 3.3V
14A
MBR0530T1 MBR0530T1
DEVICE OUTPUT CAPACITOR (C
O
)R
C
C
C
C1
LTC1530-3.3 7 X330µF 10k 0.022µF 150pF
AVX TPSE337M006R0100
LTC1530-3.3 4 X1500µF 15k 0.022µF 100pF
SANYO 6MV1500GX
LTC1530-2.8 7 X330µF 8.6k 0.022µF 150pF
AVX TPSE337M006R0100
LTC1530-2.8 4 X1500µF 13k 0.022µF 100pF
SANYO 6MV1500GX
LTC1530-2.5 7 X330µF 7.5k 0.022µF 220pF
AVX TPSE337M006R0100
LTC1530-2.5 4 X1500µF 11k 0.022µF 120pF
SANYO 6MV1500GX
LTC1530-1.9 7 X330µF 5.6k 0.033µF 220pF
AVX TPSE337M006R0100
LTC1530-1.9 4 X1500µF 8.2k 0.022µF 220pF
SANYO 6MV1500GX
1530 TA TBL
+
+
C2
0.1µF
C5
0.22µF
C3
10µF
+
+
C
IN
L1
R2, 20Ω
R1
2.7k
PV
CC
GND
LTC1530-3.3
G1
1
5
2
4
8
6
7
3
COMP
I
FB
I
MAX
G2
V
OUT
1530 TA09
V
IN
5V
C
IN
= 3× SANYO 10MV1200GX
C
OUT
= 4× SANYO 6MV1500GX
L1 = SUMIDA 6383-T018
(PRI = 1µH, SEC = 26µH)
Q1, Q2 = SILICONIX SUD50N03-10
Q3 = SILICONIX Si4450DY
R
C
4.7k
C
C
0.022µF
Q1
Q2
Q3
R4
3.74k
1%
C4
22µF
35V
+
C4
33µF
20V
C1
220pF
V
OUT1
3.3V
14A
V
OUT2
12V
0.4A
C
OUT
D2
MBR0530T1
D1
MBR0530T1
IN
OUT
ADJ
LT1129CS8
R3
8.25k
1%
5V to Dual Output (3.3V and 12V) Synchronous Buck Converter
TYPICAL APPLICATIO S
U