LTC3716 Datasheet, PDF (9/28 Pages) Linear Technology – 2-Phase, 5-Bit VID, Current Mode, High Efficiency, Synchronous Step-Down Switching Regulator

LTC3716
PI FU CTIO S
V_IN (Pin 32): Main Supply Pin. Should be closely de-
coupled to the IC’s signal ground pin.
PGOOD (Pin 36): Open-Drain Logic Output. PGOOD is
pulled to ground when the voltage on the EAIN pin is not
within ±10% of its set point.
W
FU CTIO AL DIAGRA
PLLIN
f_IN
50k
R_LP PLLFLTR
C_LP
PGOOD
PHASE DET
OSCILLATOR
CLK1
CLK2
TO SECOND
CHANNEL
0.66V
V_OS–
EAIN
0.54V
V_OS+
–
A1
+
AMPMD
0V POSITION
DIFFOUT
3V
0.18µA
FCB
4.5V –
+
+
–
V_IN
0.60V
FCB
V_REF
EXTV_CC
INTV_CC
+^5V
SGND
4.8V +
–
5V
LDO
REG
INTERNAL
SUPPLY
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
INTV_CC
V_IN
BOOST
D_B
DROP
OUT
DET
SQ
RQ
0.55V ^{+ B}
–
BOT FCB
TOP ON
TG
TOP
SW
SWITCH
LOGIC
INTV_CC
BG
BOT
PGND
SHDN
I₁
–+
0.86V
5V_FB
SLOPE
COMP
45k
1.2µA
6V
SHDN
RST
5V_FB
– ^I2
+
INTV_CC
30k ^SENSE+
30k ^SENSE–
45k
2.4V
V_FB
EA
0.60V
EAIN
OV
0.66V
RUN
I_TH
SOFT-
START
C_B
+
D1
C_IN
C_OUT
L
1 ^RSENSE 2
3
4
C_C
C_C2 R_C
RUN/SS
C_SS
V_OUT
ATTENIN _10k
ATTENOUT
R1
5-BIT VID DECODER
TYPICAL ALL
VID PINS
40k
VID0 VID1 VID2 VID3 VID4
V_BIAS
3716 FBD
9