LTC3122_15 Datasheet, PDF (8/26 Pages) Linear Technology – 15V, 2.5A Synchronous Step-Up DC/DC Converter with Output Disconnect

LTC3122
Block Diagram
V_IN
1.8V TO 5.5V
SW
1
L1
V_IN
3
C_IN
TSD
V_{REF_UP}
OSC
SD
OVLO
9 ^SD SHUTDOWN
SD
4 ^PWM/SYNC
PWM
BURST
SYNC
CONTROL
V_CC
5
C_VCC
4.7µF
V_IN V_OUT
V_BEST
LDO
ANTI-RING
BULK CONTROL
SIGNALS
V_IN
V_OUT
11
PWM
LOGIC
AND
DRIVERS
CURRENT
SENSE
PGND
+–
I_ZERO
COMP
16.2V
+–
OVLO
CAP
12
–+ –
V_C
I_LIM
REF
ADAPTIVE SLOPE COMPENSATION
FB
8
1.202V
g_m ERROR
AMPLIFIER
VC
7
SD
TSD
OVLO
SOFT-START
VC CLAMP
C1
100nF
V_OUT
2.2V TO 15V
C_OUT
R_PL
C_PL
R1
R2
C_F
R_C
C_C
RT
6
R_T
OSCILLATOR
REFERENCE
OSC
UVLO
THERMAL SD
LTC3122
THE VALUES OF RC, CC, AND CF ARE BASED UPON OPERATING CONDITIONS.
PLEASE REFER TO COMPENSATING THE FEEDBACK LOOP SECTION FOR
GUIDELINES TO DETERMINE OPTIMAL VALUES OF THESE COMPONENTS.
V_{REF_UP}
1.202V
TSD
SGND 10
PGND 2
EXPOSED PAD 13
3122 BD
3122fa
8
For more information www.linear.com/LTC3122