LTC3615 LINER [Linear Technology], LTC3615 Datasheet - Page 32

• Manufacturer Part Number: LTC3615
• Description: Dual 4MHz, 3A Synchronous Step-Down DC/DC Converter
• Manufacturer: LINER [Linear Technology]

LTC3615
Typical applicaTion
relaTeD parTs
PART NUMBER
LTC3633
LTC3546
LTC3417A-2
LTC3612
LTC3614
LTC3616

3.3V
V
IN
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
R
7.5k
47µF
C
2000pF
C
C
20pF
DESCRIPTION
15V, Dual 3A, 4MHz, Synchronous Step-Down DC/DC
Converter
5.5V, Dual 3A/1A, 4MHz, Synchronous Step-Down
DC/DC Converter
5.5V, Dual 1.5A/1A, 4MHz, Synchronous Step-Down
DC/DC Converter
5.5V, 3A, 4MHz, Synchronous Step-Down DC/DC
Converter
5.5V, 4A, 4MHz, Synchronous Step-Down DC/DC
Converter
5.5V, 6A, 4MHz, Synchronous Step-Down DC/DC
Converter
Figure 15. Single, Low Ripple 6A Output
1µF
●
R9
174k
FAX: [phone]
R8
226k
RUN1
TRACK/SS1
PGOOD1
ITH1
R
SRLIM
MODE
PHASE
RUN2
TRACK/SS2
PGOOD2
ITH2
T
SV
/SYNC
IN
LTC3615
SGND PGND
●
PV
(2 )
www.linear.com
IN1
(2 ) SW2
PV
(2 )
SW1
(2 )
IN2
FB1
FB2
3615 F15
0.47µH
0.47µH
L1
L2
COMMENTS
95% Efficiency, V
4mm × 5mm QFN-28 and TSSOP-28E Packages
95% Efficiency, V
4mm × 5mm QFN-28 Package
95% Efficiency, V
TSSOP-16E and 3mm × 5mm DFN-16 Packages
95% Efficiency, V
3mm × 4mm QFN-20 and TSSOP-20E Packages
95% Efficiency, V
3mm × 4mm QFN-20 and TSSOP-20E Packages
95% Efficiency, V
3mm × 5mm QFN-24 Package
R1
102k
R2
102k
47µF
V
1.2V/6A
OUT
IN
IN
IN
IN
IN
IN
: 3.60V to 15V, V
: 2.25V to 5.5V, V
: 2.25V to 5.5V, V
: 2.25V to 5.5V, V
: 2.25V to 5.5V, V
: 2.25V to 5.5V, V
2V/DIV,
1A/DIV
I
L1
V
V
+ I
100
SW1
SW2
90
80
70
60
40
30
20
10
Figure 17. Efficiency vs Load Current
for V
50
I
I
L1
L2
L2
0
Figure 16. Reduced Ripple Current
(Waveform I
(Not Shown) Through 180° Phase Shift
Between SW1 and SW2
0.01
MODE = FCM
V
MODE = FCM
OUT(MIN)
OUT
OUT
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
= 1.2V
= 1.2V and I
 LINEAR TECHNOLOGY CORPORATION 2010
OUTPUT CURRENT (A)
= 0.6V, I
= 0.6V, I
= 0.8V, I
= 0.6V, I
= 0.6V, I
= 0.6V, I
0.1
L1
+ I
200ns/DIV
L2
Q
Q
Q
Q
Q
Q
) and Ripple Voltage
OUT
= 500µA, I
= 160µA, I
= 125µA, I
= 75µA, I
= 75µA, I
= 75µA, I
LT 0410 • PRINTED IN USA
Up to 6A
1
V
V
V
IN
IN
IN
SD
SD
SD
SD
SD
SD
= 2.5V
= 3.3V
= 5V
< 1µA,
< 1µA,
< 1µA,
< 13µA,
< 1µA,
< 1µA,
3615 F16
3615 F17
10
3615f