LTC3124_15 Datasheet, PDF (9/28 Pages) Linear Technology – 15V, 5A 2-Phase Synchronous Step-Up DC/DC Converter with Output Disconnect

BLOCK DIAGRAM
LTC3124
SWB
1
ANTI-
RING
LB
SWA
3
ANTI-
RING
LA
V_IN
1.8V TO 5.5V ₊
C_IN
5 ^VIN
PWM
LOGIC
AND
DRIVERS
PWM
COMP
CURRENT
SENSE
+
+
I_PEAK
3.5A
COMP
ADAPTIVE SLOPE COMP
PWM
LOGIC
AND
DRIVERS
PWM
COMP
CURRENT
SENSE
+
+
I_PEAK
3.5A
COMP
ADAPTIVE SLOPE COMP
BULK
V_IN
CONTROL
SIGNALS
+–
I_ZERO
COMP
SHUT
DOWN
EN
V_OUT – 5.4V RAIL
V_{OUTB 15}
SD ₁₁
C_CAP
100nF
CAP
16
STOP SWITCHING
OVLO
NC 14
16.5V
BULK
V_IN
CONTROL
SIGNALS
V_{OUTA 13}
+–
IZERO
COMP
BURST
SLEEP
Burst
Mode
CONTROL
V_IN
4.25V
LDO
TSD
THERMAL SD
REFERENCE
1.2V
V_REFUP
SOFT-
START
V_OUT
2.5V TO 15V
C_OUT
9 ^VC
C_F
R_C
C_C
PGNDB
2
OSCILLATOR
SYNC
g_m ERROR
AMPLIFIER
RT
8
R_T
R1
FB
V_CC
10
PWM/SYNC SGND
EXPOSED
R2
V_CC PGNDA
PAD
6
12
7
4
17
3124 BD
C_VCC
3124f
For more information www.linear.com/LTC3124
9