IR3621F International Rectifier, IR3621F Datasheet - Page 19

• Manufacturer Part Number: IR3621F
• Description: IC PWM DUAL SYNC PREBIAS 28TSSOP
• Manufacturer: International Rectifier

Specifications of IR3621F

• Pwm Type: Voltage Mode
• Number Of Outputs: 2
• Frequency - Max: 345kHz
• Duty Cycle: 86.5%
• Voltage - Supply: 5.5 V ~ 14.5 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-TSSOP
• Frequency-max: 345kHz
• Package: 28-Pin TSSOP
• Circuit: Dual Sync PWM Controller or 2Phase Single Output
• Vcc (min): 4.7
• Vcc (max): 16
• Vout (min): 0.8
• Vout (max): Vcc * 0.90
• Switch Freq (khz): programmable to 500kHz
• Pbf: PbF Option Available
• For Use With: IRDC3621 - BOARD EVAL DUAL SYNC BUCK CTRLR
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TYPICAL APPLICATION
12V
PGood
Figure 20 - 2-phase operation with inductor current sensing using type 2 compensation.
C10
C3
C8
C9
R2
C5
C4
R3
R4
V
Vcc
Hiccup
Sync
V
Rt
Comp1
Comp2
PGood
SS2 / SD
SS1 / SD
CL
REF
C12
VcH1
IR3621
U1
V
12V to 1.8V @ 30A output
OUT3
OCSet1
OCSet2
PGnd2
PGnd1
HDrv2
HDrv1
LDrv2
LDrv1
V
V
VcH2
Gnd
SEN1
SEN2
Fb1
Fb2
V
www.irf.com
P2
V
SEN1
R6
R1
C13
Q2
Q3
Q4
Q5
C17
C14
D1
C11
R5
R9
L3
L4
IR3621 & (PbF)
C15
C18
R7
R8
R7
R8
C16
1.8V @ 30A
19