LTC3861-1 Datasheet, PDF (11/36 Pages) Linear Technology – Dual, Multiphase Step-Down Voltage Mode DC/DC Controller with Accurate Current Sharing

Functional Diagram
LTC3861-1
VSNSOUT
4
VSNSP
6
DA
VSNSN
5
BG/BIAS
COMP1
3
REF
TRACK/SS1
32
FB1
2
+
+ EA1
–
REF
TRACK/SS2
9
FB2
8
COMP2
7
+
+ EA2
–
ISNS1P
22
ISNS1N
21
+
x18.5
–
ISNS2P
19
ISNS2N
20
+
x18.5
–
1
29
30
V_CC SGND CONFIG
V_CC
100k
24
RUN1
V_CC
100k
1.5µA
1.5µA
V_CC
17
27
14
RUN2 PGOOD1 PGOOD2
PGOOD
V_FB1
V_FB2
SD/UVLO
+
OC1 OC2
OV1 OV2
V_FB1
I_LIM1
V_FB2
I_LIM2
S
+
MASTER/SLAVE/
INDEPENDENT
V_CC
20µA
NOC1
NOC2
LOGIC
RAMP/SLOPE/
FEEDFORWARD
V_CC
OC1
NOC1
20µA
S
V_CC
OC2
NOC2
21µA
PLL/VCO
PWM1
25
PWMEN1
26
PWM2
16
PWMEN2
15
VINSNS
31
I_AVG
28
I_LIM2
18
I_LIM1
23
FREQ PHSMD CLKOUT CLKIN
10 13
12
11
38611 BD
38611f
11