LTC3869-2_15 Datasheet, PDF (10/42 Pages) Linear Technology – Dual, 2-Phase Synchronous Step-Down DC/DC Controllers

LTC3869/LTC3869-2
Functional Block Diagram
FREQ
10µA
PLL-SYNC
I_LIM
LTC3869UFD
ONLY
MODE/PLLIN
MODE/SYNC
DETECT
EXTV_CC
4.7V
–+
F
0.6V
5V
REG
–+
F
OSC
3k
I_CMP
S
RQ
–
I_REV
+
FCNT
BURSTEN
ON
SWITCH
LOGIC
AND
ANTI-
SHOOT
THROUGH
RUN
OV
SLOPE COMPENSATION
INTV_CC
UVLO
1
51k
I_THB
V_IN
SLEEP
0.6V
REF
+–
0.5V
SLOPE RECOVERY
UV
ACTIVE CLAMP
OV
+ ^SS –
– ^RUN +
EA
1.2µA
0.5V
1.2V
I_{TH RC} ^CC1
RUN
TK/SS
C_SS
V_IN
V_IN
+
C_IN
INTV_CC
BOOST
TG
C_B
SW
SENSE⁺ DB
SENSE^–
BG
C_VCC
PGND
PGOOD
0.54V
V_FB
INTV_CC
M1
L1
V_OUT
+
C_OUT
M2
R2
R1
0.66V
SGND
1µA
3869 FD
10
For more information www.linear.com/LTC3869
38692fa