LTC3878_15 Datasheet, PDF (8/26 Pages) Linear Technology – Fast, Wide Operating Range No RSENSE Step-Down DC/DC Controller

LTC3878
Functional Diagram
R_ON
7 ION
FCB
4
0.8V
1.4V
V_RNG
3
0.7V
OST
t_ON
=
0.7V
I_ON
(10pF)
I_CMP
R_DSS
20k
sV_RNG
3.3µA
R
SQ
+
I_REV
–
RUN
OV
F
FCNT
SWITCH
LOGIC
10 VIN
0.8V
REF
5.3V
LDO
BOOST
16
TG
15
SW
14
INTV_CC
11
BG
12
PGND
13
C_B
MT
D_B
C_INTVCC
MB
V_IN
C_VIN
V_OUT
C_OUT
1
240k
NEG
CLMP
PGOOD
2
PG
POS
CLMP
160µA
1.7mS
EA
+–
0.8V
FCNT 0.6V
2.4V
1.16V ^+–
s4
+– _–90mV
RUN
+–
CURRENT
LIMIT
SOFT-START
1.5V
1.2µA
I_TH 5
C_C1
R_C
RUN/SS 1 C_SS
0.86V
OV
V_FB
R2
8
R1
SGND
UV
6
0.74V
3878 FD
3878fa