LTC3370EUH Datasheet, PDF (2/10 Pages) Linear Technology – 4-Channel 8A Configurable Buck DC/DCs

DEMO MANUAL DC2311A
Typical Application
4 × 2A Quad Buck Application
2.25V TO 5.5V
2.5V TO 5.5V
22µF
1.2V
2A
22µF
2.5V
2A
2.2µH
47µF _232k
464k
2.2µH
47µF _665k
309k
V_INA
V_INB
SWA
SWB
FB1
V_ING
V_INH
SWG
SWH
FB4
LTC3370
V_INC
V_IND
SWC
SWD
FB2
V_INE
V_INF
SWE
SWF
FB3
2.2µH
511k
162k
2.2µH
866k
649k
3.3V
2A
47µF
3.3V TO 5.5V
22µF
1.8V
2A
47µF
2.25V TO 5.5V
22µF
MICROPROCESSOR
CONTROL
EN1
EN2
EN3
EN4
PLL/MODE
C1
C2
C3
V_CC
PGOODALL
TEMP
RT
402k
EXPOSED PAD
3370 TA02
2.7V TO 5.5V
10µF
MICROPROCESSOR
CONTROL
Buck Efficiency vs I_LOAD
100
90
80
70
60
50
40
30 _{Burst Mode OPERATION}
20
V_IN = 3.3V
V_OUT = 1.8V
SINGLE CHANNEL
DUAL CHANNEL
10 ^f OSC ^{= 1MHz}
TRIPLE CHANNEL
L = 3.3µH
0
QUAD CHANNEL
1
10
100
1000 4000
LOAD CURRENT (mA)
3370 TA01b
C3 C2 C1 BUCK1 BUCK2 BUCK3 BUCK4
0
0
0
2A 2A 2A 2A
0
0
1
3A 1A 2A 2A
0
1
0
3A 1A 1A 3A
0
1
1
4A 1A 1A 2A
1
0
0
3A
2A
–
3A
1
0
1
4A
–
2A 2A
1
1
0
4A
–
1A 3A
1
1
1
4A
–
–
4A
dc2311af
2