LTC3425_15 Datasheet, PDF (10/24 Pages) Linear Technology – 5A, 8MHz, 4-Phase Synchronous Step-Up DC/DC Converter

LTC3425
BLOCK DIAGRA
1V TO 4.5V
+
+
FB
–
0.8V
CCM
26
29
V_IN
1 OF 4
PMOS
ENABLE
MODE CONTROL
28 ^RT
DIVIDER
4-PHASE
GEN
4 _CLK
4 IOSC
OSC
3
SWA
ANTIRING
PWM LOGIC
AND
DRIVERS
SLOPE
6
19
SWB SWC
22
SWD
P
–+
N
I/2000
ZERO
++
Σ
+
Σ₊
1.086/
1.116
+
–
V_{OUTA 4}
V_OUTB
5
V_{OUTC 20}
V_{OUTD 21}
V_OUTS 10
PGOOD
16
SYNC
SYNCIN
30
444
SYNCOUT
25
THERMAL SHDN
SHDN
OFF ON 31
SHUTDOWN
REFEN
OFF ON REFOUT 9
REFOUT
15
GNDA
12
MODE
SLEEP
Burst Mode
CONTROL
BURST
COMP
0.94V
ERROR
AMP
V_REF
V_REF
1.22V
GNDB
78
GNDC
17 18
–3%
UV
START-UP,
SOFT-START
3%
AND
OV
THERMAL REG
GNDD
23 24
SGND
11 33
BURST SS
14
32
1.22V
FB
12
COMP
13
I_LIMIT
I_LIM
27
V_OUT
2.5V TO 5.25V
3425f
10