IR3621F International Rectifier, IR3621F Datasheet - Page 2

• 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

IR3621 & (PbF)
ABSOLUTE MAXIMUM RATINGS
Vcc, V
VcH1 and VcH2 Supply Voltage ................................ -0.5V To 25V
PGOOD....................................................................
Storage Temperature Range ...................................... -55°C To 150°C
Junction Temperature Range ..................................... -40°C To 150°C
ESD Classification ...................................................
Caution:
ratings only and function of the device at these or any other conditions beyond those indicated in the operational sections of the specifica-
tions is not implied. Exposure to “Absolute Maximum Rating” conditions for extended periods may affect device reliability
RECOMMENDED OPERATING CONDITIONS
2
PACKAGE INFORMATION
Parameter Definition
Vcc
VcH1,2
Fs
Tj
CL
SS2 / SD
OCSet2
Comp2
PGood
Supply Voltage ...........................................
PGnd2
HDrv2
LDrv2
V
V
VcH2
Stresses above those listed in “Absolute Maximum Rating” may cause permanent damage to the device. These are stress
OUT3
SEN2
Fb2
V
Supply Voltage
Supply Voltage
Junction Temperature -40
V
Operating Frequency
CC
Rt
CL
28-PIN TSSOP (F)
10
12
14
11
13
1
2
3
4
5
6
7
8
9
JA
JC
IR3621F
= 75.5 C/W
=13.3 C/W
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Gnd
V
Comp1
SS1 / SD
OCSet1
VcH1
HDrv1
PGnd1
LDrv1
V
Sync
Fb1
V
Hiccup
SEN1
REF
P2
Min
200
5.5
10
Max
125
14.5
500
20
www.irf.com
Units
°C
kHz
V
V
-0.5V To 16V
JEDEC, JESD22-A114
-0.5V To 16V
SS2/SD2
OCSet2
Comp2
HDrv2
VCH2
V
Exposed pad on underside is connected to a copper
pad through vias for 4-layer PCB board design.
SEN2
Fb2
Rt
32-Lead MLPQ 5mmx5mm (M)
7
4
5
6
8
1
2
3
32
9
IR3621M & IR3621MPbF
10
31
30
11 12
JA
JC
= 36.0 C/W
= 1.0 C/W
Pad
29
13
28
27
14 15
26
25
16
19
18
17
23
22
21
20
24
SS1/SD1
OCSet1
Hiccup
V
Sync
Fb1
Comp1
VcH1
SEN1