LTC3812-5_15 Datasheet, PDF (10/34 Pages) Linear Technology – 60V Current Mode Synchronous Switching Regulator Controller

LTC3812-5
FUNCTIONAL DIAGRAM
INTV_CC
EXTV_CC N_DRV INTV_CC
5V
0.8V
REG
REF
INTV_CC
MODE LOGIC 5.5V +
0.8V
FCB
4
+
F
–
INTV_CC
UV
9V
–
OFF
4.2V
NDRV
9
INTV_CC
11
EXTV_CC
10
V_IN
M3
R_ON ^ION
V_IN
1
1.4μA
100nA
2.4V
t_ON = _IION (76pF)
20k
I_CMP
R
SQ
+
I_REV
–
1.4V
V_RNG
2
I_TH ^0.7V
5
C_C2
R_C
C_C1
×
OVERTEMP
SENSE
I_TH
5V
FOLDBACK
FB
2.6V
FAULT
EA
– ^0.8V
1.5V ₊
RUN/SS
7
270μA
5.5V
–+
ON
TIMEOUT
LOGIC
DRV OFF
FCNT
ON
SWITCH
LOGIC
SHDN
OV
D_B
4.7V
BOOST
16
TG
15
SW
14
INTV_CC
BG
12
PGND
13
V_IN
C_IN
C_B
M1
L1
V_OUT
C_VCC
M2
+
C_OUT
PGOOD
3
R_FB1
RUN
+ ^SHDN –
1.5V
0.72V
UV
V_FB
6
R_FB2
OV
SGND
8
0.88V
10
38125 FD
38125fc