LTC4008 データシートの表示（PDF） - Linear Technology
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LTC4008 Datasheet PDF : 32 Pages
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W
FU CTIO AL DIAGRA
PLLIN
FIN
50k
RLP PLLFLTR
CLP
CLKOUT
PHASMD**
PHASE DET
OSCILLATOR
CLK1
CLK2
CLK3
LTC3731
PGOOD**
100µs
DELAY
PROTECTION
FCB
+
–
0.6V
IN–
40k
IN+
40k
DIFFOUT
0.66V
EAIN
0.54V
FCB
40k
–
A1
+
40k
R1
EAIN
VFB
R2
0.600V
0.660V
ITH
–
EA
+
OV
+
–
CC
RC
UVADJ
–
1.2V +
DUPLICATE FOR SECOND AND THIRD
CONTROLLER CHANNELS
BOOST
RS
LATCH
DROP
OUT
DET
BOT
TG
TOP
SQ
FORCE BOT
RQ
SWITCH
SW
LOGIC
0.55V
B
FCB
SHDN
VCC (VDR)***
BG
BOT
PGND
VCC
VIN
DB
CB
+
CIN
I1 – +
SLOPE
COMP
5(VFB)
0.86V
SS
CLAMP 2.4V
3mV
54k
–
I2
+
54k
L
VCC
36k SENSE+
36k SENSE–
RSENSE
COUT
VOUT
FCB
VCC
1.5µA
6V
SHDN
RST
5(VFB)
SHED
RUN
SOFT-
START
1.2V
0.600V
INTERNAL
SUPPLY
UV RESET
VREF
VCC
SGND*
VCC
+
CCC
RUN/SS
CSS
*THE LTC3731CUH USES THE EXPOSED DIE ATTACH PAD FOR THE SGND CONNECTIONS
**THE PHASMD AND PGOOD PIN FUNCTIONS ARE TIED TOGETHER IN THE LTC3731CUH PACKAGE
***LTC3731CG/HG ONLY
Figure 2
3731 F02
3731fa
9
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