LTC1628C 查看數據表（PDF） - Linear Technology
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LTC1628C Datasheet PDF : 32 Pages
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LTC1628/LTC1628-PG
PI FU CTIO S
FLTCPL (Pin 28): (LTC1628 Only) Fault Coupling Control
Pin that determines if fault/normal conditions on one
controller will act on the other controller. FLTCPL = INTVCC
to couple channels; FLTCPL = 0V to decouple.
PGOOD (Pin 28): (LTC1628-PG Only) Open-Drain Logic
Output. PGOOD is pulled to ground when the voltage on
either VOSENSE pin is not within ±7.5% of its set point.
W
FU CTIO AL DIAGRA
FREQSET
1.19V
1M
OSCILLATOR
CLK1
CLK2
FLTCPL
MERGE LOGIC
RUN/SS1
RUN/SS2
VSEC
3V
0.18µA
R6
FCB
R5
4.5V –
+
+
–
BINH
FCB
3.3VOUT
0.8V
VREF
VIN
VIN
EXTVCC
INTVCC
+5V
SGND
4.8V +
–
STBYMD
5V
LDO
REG
INTERNAL
SUPPLY
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
BOOST
DROP
OUT
DET
SQ
RQ
BOT FCB
TOP ON
TG
TOP
SW
SWITCH
LOGIC
INTVCC
BG
BOT
0.55V
+B
–
SHDN
PGND
I1
I2
–
– ++ –
+
0.86V
3mV
4(VFB)
SLOPE
COMP
45k
45k
2.4V
EA
OV
1.2µA
6V
SHDN
RST
4(VFB)
RUN
SOFT
START
INTVCC
30k SENSE+
30k SENSE–
VFB
0.80V
VOSENSE
0.86V
ITH
RUN/SS
INTVCC
VIN
DB
CB
+
D1
RSENSE
DSEC
R2
R1
CC
CC2
RC
CIN
COUT
CSEC
VOUT
CSS
1628 FD/F02
Figure 2
9
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