LTC3855IFE#PBF Linear Technology, LTC3855IFE#PBF Datasheet - Page 31

• Manufacturer Part Number: LTC3855IFE#PBF
• Description: IC CTLR DC/DC MULTIPHASE 38SSOP
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3855IFE#PBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.6 ~ 3.3 V, 0.6 ~ 12.5 V
• Current - Output: 25A
• Frequency - Switching: 250kHz ~ 770kHz
• Voltage - Input: 4.5 ~ 38 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 38-TSSOP Exposed Pad, 38-eTSSOP, 38-HTSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

applicaTions inForMaTion
R
IN
V
IN
C
IN
BOLD LINES INDICATE
HIGH SWITCHING
CURRENT. KEEP LINES
TO A MINIMUM LENGTH.
f
IN
Figure 14. Recommended Printed Circuit Layout Diagram
CLKOUT
I
V
SENSE1
SENSE1
FREQ
I
MODE/PLLIN
RUN1
RUN2
SGND
SENSE2
SENSE2
V
I
TK/SS2
TH1
LIM
TH2
FB1
FB2
+
–
–
+
LTC3855
Figure 15. Branch Current Waveforms
DIFFOUT
BOOST1
BOOST2
EXTV
TK/SS1
PGOOD
INTV
DIFFP
DIFFN
PGND
SW1
SW2
SW1
SW2
BG1
BG2
TG1
TG2
V
CC
CC
IN
D1
D2
R
PGOOD
PU2
L1
L2
C
C
V
C
B1
B2
PULL-UP
INTVCC
R
R
C
VIN
SENSE1
SENSE2
C
C
OUT1
OUT2
CERAMIC
V
V
V
R
M1
M3
IN
OUT1
OUT2
IN
1µF
CERAMIC
M2
M4
1µF
L1
C
L2
IN
R
R
SENSE
SENSE
C
C
3855
OUT1
OUT2
D1
D2
3855
F15
F14
R
R
L1
L2
V
GND
V
OUT1
OUT2
LTC3855

3855f