Datasheet

LTC3415
6
3415fa
FUNCTIONAL DIAGRAM
29
–
+
10
38 12
3
34
2
11
CLKIN FUNCTION
HIGH
LOW
SYNC
SPR FREE-RUN PLL-SYNC
PHMODE CLKOUT
HIGH
LOW
FLOAT
180
° (2-PHASE)
120
° (3-PHASE)
90
° (4-PHASE)
MODE FUNCTION
HIGH
LOW
FLOAT
BURST-EN FORCE-CONT. PULSE-SKIP
PV
IN
4,5,27,28,35,36
0.032Ω
SW
6,7,8,9,23,24,25,26
PGND
13,14,15,16,17,18,19
0.025Ω
ANTI-
SHOOT-
THRU
TG
BG
SWITCHING
LOGIC
AND
BLANKING
CIRCUIT
RS LATCH
S
RQ
Q
CHECKS INDUCTOR CURRENT ZERO CROSSING
COMP FOR SHORT-CIRCUIT PROTECTION
20% PEAK
BURST CLAMP
SLEEP
–
+
I
RCMP
+
–
NICMP
+
–
+
–
I
COMP
+
–
+
–
+
–
OVDET
+
–
UVDET
+
–
50mV
BURST
EN
0.2V
V
IN
–0.5V
0.54V
0.66V 0.63V
0.6V
0.57V 0.54V
0.66V
MODE
33
I
THMINUS
I
THBUF
1.5V CLAMP I
MAX
+ SLOPE
CLAMP
OSC
PHMODE
CLKOUT
V
FB
30
TRACK
37
RUN
18MHz/12
OSC
PLL
SPREAD
SPECTRUM
V1P8
SLOPE
COMP
INTV
CC
GENERATOR
CLKIN
PLLLPF
SV
IN
20
MARGINING
MUX
INT.
SHDN
THERMAL
SHDN
2V TO 2.2V
UVLO
0.1ms
INTERNAL SS
MGN
21
BSEL
SGND
32
I
TH
EXT/INT
COMP
22
PGOOD
OV
UV
+
–
EA
INT. SS
EA DISABLE
–
+
V
FB
COMP
V
IN
–0.5V
1.5V
0.18V
SHUTDOWN
SV
IN
3415 FD
+
–
TRACK
FALLING
COMP
–
+
RUN
COMP
I
TH
BUFFER
(GM = 2M
)
Ω