ltc3891 Linear Technology Corporation, ltc3891 Datasheet - Page 27

• Manufacturer Part Number: ltc3891
• Description: Ltc3891 - Low Iq, 60v Synchronous Step-down Controller
• Manufacturer: Linear Technology Corporation

APPLICATIONS INFORMATION
*R1, C1 AND D1 ARE OPTIONAL
V
IN
R
IN
BOLD LINES INDICATE HIGH SWITCHING
CURRENT. KEEP LINES TO A MINIMUM LENGTH.
C
IN
R1*
Figure 10. Recommended Printed Circuit Layout Diagram
C1*
TRACK/SS
FREQ
PLLIN/MODE
SGND
SGND
RUN
SENSE
SENSE
V
ITH
FB
Figure 11. Branch Current Waveforms
–
+
LTC3891
D1
PGOOD
EXTV
BOOST
INTV
PGND
SW
SW
I
TG
LIM
V
BG
CC
CC
IN
L1
C
INTVCC
R
OUT
R
M1
SENSE
PGOOD
C
OUT
CERAMIC
V
V
PULL-UP
M2
OUT
1µF
L1
C
IN
V
IN
R
D1*
SENSE
GND
C
OUT
3891 F11
3891 F10
LTC3891
R
L1
V
OUT
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3891f