IR3621F International Rectifier, IR3621F Datasheet - Page 3

• 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

ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over Vcc=12V, VcH1=VcH2=V
PARAMETER
Soft-Start / SD Section
Charge Current
Shutdown Threshold
Power Good Section
V
PGood Output Low Voltage
Error Amp Section
Fb Voltage Input Bias Current
Transconductance 1
Transconductance 2
Error Amp Source/Sink Current
Input Offset Voltage for E/A1,2
VP2 Voltage Range
Oscillator Section
Frequency
Ramp Amplitude
Min Duty Cycle
Min Pulse Width
Max Duty Cycle
Synch Frequency Range
Synch Pulse Duration
Synch High Level Threshold
Synch Low Level Threshold
Note1: Cold temperature performance is guaranteed via correlation using statistical quality control. Not 100% tested in production.
Output Voltage Accuracy
Feedback Voltage
Accuracy
UVLO Section
UVLO Threshold - Vcc
UVLO Hysteresis - Vcc
UVLO Threshold - VcH1,2
UVLO Hysteresis - VcH1,2
Supply Current Section
Vcc Dynamic Supply Current
VcH1 & VcH2 Dynamic Current
V
Vcc Static Supply Current
VcH1/VcH2 Static Current
V
SENS1,2
CL
CL
Dynamic Supply Current
Static Supply Current
Lower Trip Point
UVLO
Sync(puls)
SYMBOL
Sync(Fs)
PG
Puls(ctrl)
UVLO
Sync(H)
V
Sync(L)
PG
V
Dyn I
Dyn I
Dyn I
Dmax
V
I
Dmin
Fb1 ,
SS
OS(ERR)
VP2
Freq
(E/A)1,2
I
SD
FB1,2
g
g
I
I
I
RAMP
(Voltage)
CCQ
CHQ
CLQ
FB1,2L
m1
m2
V
V
IB
C
V
CC
CH
CL
Fb2
H1,2
CC
SS=0V
V
I
SS=3V
Fb
Note2
Rt
Note2
Fb=1V
F
Fb=0.6V, F
20% above free running freq
MLPQ
TSSOP
Supply Ramping Up
Supply Ramp Up and Down
Supply Ramping Up
Supply Ramp Up and Down
Freq=300kHz, C
Freq=300kHz, C
Freq=300kHz, C
SS=0V
SS=0V
SS=0V
SINK
SENS1,2
SW
(SET)
1,2
=300kHz, Note2
=2mA
www.irf.com
to V
to 30.9K
TEST CONDITION
Ramping Down
REF
SW
Tj=25°C
Tj=25°C
0°C <T
-40°C <T
0°C <T
-40°C <T
=200kHz
L
L
L
=1500pF
=1500pF
=1500pF
j
j
< 125°C
< 125°C
j
j
< 125°C
< 125°C
0.8
1400
1400
-1.35
-1.35
-1.65
86.5
-2.5
MIN
255
150
200
-3.0
0.4
4.7
3.5
22
60
-4
-1
2
V
REF
IR3621 & (PbF)
CL
=12V and 0°C<T
0.9
1.25
0.80
0.75
-0.1
TYP
100
300
0.1
28
10
15
15
10
0
1
6
6
V
REF
0.95
+1.35
+1.35
+1.35
+1.65
+1.65
Vcc-2
MAX
2500
2500
1200
0.25
-0.5
140
345
5.3
4.0
+1
0.5
0.6
15
25
25
15
10
10
+4
35
0
V
REF
j
<125°C.
UNITS
µmho
µmho
mA
mA
mA
mA
mA
mA
kHz
kHz
mV
µA
µA
µA
%
%
%
%
%
%
ns
ns
V
V
V
V
V
%
%
V
V
V
V
V
V
V
3