ir3820 International Rectifier Corp., ir3820 Datasheet - Page 5

• Manufacturer Part Number: ir3820
• Description: Wide-input Voltage, Synchronous Buck Regulator
• Manufacturer: International Rectifier Corp.

11/04/08
Recommended Operating Conditions
Electrical Specifications
Unless otherwise specified, these specification apply over Vin=V
Typical values are specified at T
Power Loss
Power Loss
MOSFET R
Top Switch
Bottom Switch
Reference Voltage
Feedback Voltage
Accuracy
Supply Current
V
V
(Static)
V
(Dynamic)
V
(Dynamic)
Under Voltage Lockout
V
V
V
V
V
V
CC
C
CC
C
V
V
V
V
I
T
Symbol
o
CC
CC
CC
C
C
C
Supply Current
Supply Current
j
-Start-Threshold
-Stop-Threshold
-Hysteresis
in
cc
c
o
-Start-Threshold
-Stop-Threshold
-Hysteresis
Supply Current (Static)
Supply Current
Note1
Parameter
ds(on)
Input Voltage
Supply Voltage
Supply Voltage
Output Voltage
Output Current
Junction Temperature
Definition
V
V
V
V
CC
CC
C
C
Symbol
I
R
R
I
CC(Dynamic)
_UVLO(R)
_UVLO(F)
I
C(Dynamic)
_UVLO(R)
_UVLO(F)
CC(Static)
I
ds(on)_Top
ds(on)_Bot
C(Static)
P
V
loss
FB
a
= 25
o
C.
Vcc=V
I
I
I
0
-40
SS=0V, No Switching
SS=0V, No Switching
SS=3V, V
V
SS=3V, V
V
Supply ramping up
Supply ramping down
Supply ramping up and down
Supply ramping up
Supply ramping down
Supply ramping up and down
o
D
D
o
=12A, L=0.6uH, Note3
=13A, Tj(MOSFET)=25
=13A, Tj(MOSFET)=25
o
o
C<Tj<105
=1.8V, Io=0A
=1.8V, Io=0A
o
C<Tj<105
in
=12V, Vc=24V, V
c
c
Test Condition
=24V, V
=24V, V
o
C
o
C, Note2
Vin + 5V
Min
cc
cc
2.5
4.5
0.6
-40
=V
=V
0
in
in
=12V.
=12V.
o
o
o
C
C
=1.8V,
cc
=V
c
=12V, 0
-1.35
Min
0.15
2.85
0.15
-1.5
4.0
3.7
3.1
Max
125
21
14
28
12
12
o
IR3820MPbF
C<T
TYP
0.25
0.6
4.5
0.2
3.7
6.9
6.9
10
21
21
j
(Ic)<105
MAX
+1.35
+1.5
3.25
0.25
4.4
4.1
0.3
3.5
8.7
8.7
13
30
30
7
PD-60329
o
Units
C.
o
V
A
C
Units
mΩ
mA
W
%
%
V
V
5