LTC3879_15 Datasheet, PDF (9/28 Pages) Linear Technology – Fast, Wide Operating Range No RSENSE Step-Down Controller

FUNCTIONAL DIAGRAM
R_ON
7 ION
4 MODE
0.8V
OST
t_ON
=
0.7V
I_ON
(10pF)
I_COMP
RUN
9 ^+1.2μA +
RUN
1.5V
–
R_DS(S)
V_RNG
3
0.560V
0.225V
sV_RNG
3.3μA
R
SQ
+
I_REV
–
RUN
F
FCNT
SWITCH
LOGIC
OV
LTC3879
10 VIN
0.6V
REF
5.3V
REF
BOOST
16
TG
15
SW
14
INTV_CC
11
BG
12
PGND
13
C_B
M_T
D_B
C_VCC
M_B
PGOOD
2
V_IN
C_IN
V_OUT
C_OUT
1
240k
NEG
CLMP
POS
CLMP
FCNT 0.6V
2.4V
+– _1.16V
160μA
1.7ms
0.6V
SOFT-START DONE
X5.33
+– _–67.5mV
EA
+–
5 ITH
C_C1
R_C
0.66V
F
V_FB
8
SGND
F
6
0.54V
SS
–+
1μA
1 TRACK/SS C_SS
R2
R1
3879 FD01
3879f
9