IR3622MTRPBF Datasheet, PDF (27/31 Pages) International Rectifier – HIGH FREQUENCY 2-PHASE, SINGLE OR DUAL OUTPUT SYNCHRONOUS STEP DOWN CONTROLLER WITH OUTPUT TRACKING AND SEQUENCING

Typical Application
IR3622MPbF
D1
C12
BAT54S
12V
C11
C3
C4
R26
C5
R27
VOUT3
R2
R3
C8
R24
PGood1
PGood2
R25
R4
C9
C10
C15
Vout1
RA
RB
VCL VcH1 VOUT3 VcH2
Vcc
HDrv1
OCSet1
C13
R1
Enable
VP1
VREF
VP2
Rt
U1
IR3622
Comp1
LDrv1
PGnd1
Sync
VSEN1 ^VSEN1
VSEN2 ^VSEN2
Fb1
Fb2
VOUT3
C14
Q2
L3
Q3
R20
D2 ^VSEN1
BAT54S
R21
C30
C17
Vout1
C16
R7
R8
R5
Comp2
PGood1
PGood2
SS1 / SD
SS2 / SD
HDrv2
R6
OCSet2
LDrv2
PGnd2
Q4
L4
R9
Q5
C18
R22
VSEN2
R23
Vout2
Seq
Gnd
Track
Fig. 24: Application circuit for Dual output application
Tracking and sequencing using Track pin
Track Pin
Simultaneously
Ratiometric
R_A=R₉ , R_B=R₅
R_A =R₇ , R_B=R₈
www.irf.com
27