LTC3622-2_15 Datasheet, PDF (19/24 Pages) Linear Technology – 17V, Dual 1A Synchronous Step-Down Regulator with Ultralow Quiescent Current

LTC3622/
LTC3622-2/LTC3622-23/5
Typical Applications
V_OUT1
5V
1A
5V/3.3V V_OUT, Burst Mode Operation, In-Phase Switching
V_IN
17V MAX
C_IN
10µF
6.8µH
C_OUT1
22µF
22pF 619k
84.5k
V_IN1
INTV_CC
V_{IN2 MODE/SYNC}
RUN1
RUN2
PHASE
I_LIM
LTC3622-2
PGOOD1 PGOOD2
SW1
SW2
FB1 _GND FB2
C1
1µF
3.3µH
619k
137k
22pF
V_OUT2
3.3V
1A
C_OUT2
22µF
3622 TA02
Efficiency vs Load
100
90
80
70
60
50
40
30
V_OUT = 5V
V_OUT = 3.3V
20 _{VIN = 12V}
10 ^fSW ^{= 2.25MHz}
Burst Mode OPERATION
0
0.0001 0.001
0.01
0.1
LOAD CURRENT (A)
1
3622 TA02a
Load Step Waveform
I_L
500mA/DIV
V_OUT
AC-COUPLED
200mV/DIV
V_IN = 12V
40µs/DIV
V_OUT1 = 5V
I_LOAD = 5mA → 500mA
BURST MODE OPERATION
f_SW = 2.25MHz
3622 TA02b
For more information www.linear.com/LTC3622
3622fa
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