User Manual

11/04/08
5
PD-60357
IR3802AMPbF
Recommended Operating Conditions
Parameter Symbol Test Condition Min TYP MAX Units
Power Loss
Power Loss P
loss
Vcc=V
in
=12V, Vc=24V, V
o
=1.8V,
I
o
=6A, L=2.2uH, Note3
1.8 W
MOSFET R
ds(on)
Top Switch R
ds(on)_Top
I
D
=6A, Tj(MOSFET)=25
o
C 18 23
Bottom Switch R
ds(on)_Bot
I
D
=6A, Tj(MOSFET)=25
o
C 18 23
mΩ
Reference Voltage
Feedback Voltage V
FB
0.6 V
0
o
C<Tj<105
o
C -1.5 +1.5 % Accuracy
-40
o
C<Tj<105
o
C, Note2 -2.0 +2.0 %
Supply Current
V
CC
Supply Current (Static) I
CC(Static)
SS=0V, No Switching 10 13
V
C
Supply Current
(Static)
I
C(Static)
SS=0V, No Switching 4.5 7
V
CC
Supply Current
(Dynamic)
I
CC(Dynamic)
SS=3V, V
c
=24V, V
cc
=V
in
=12V.
V
o
=1.8V, Io=0A
13 20
V
C
Supply Current
(Dynamic)
I
C(Dynamic)
SS=3V, V
c
=24V, V
cc
=V
in
=12V.
V
o
=1.8V, Io=0A
13 20
mA
Under Voltage Lockout
V
CC
-Start-Threshold V
CC
_UVLO(R) Supply ramping up 4.0 4.4
V
CC
-Stop-Threshold V
CC
_UVLO(F) Supply ramping down 3.7 4.1
V
CC
-Hysteresis Supply ramping up and down 0.15 0.25 0.3
V
C
-Start-Threshold V
C
_UVLO(R) Supply ramping up 3.1 3.5
V
C
-Stop-Threshold V
C
_UVLO(F) Supply ramping down 2.85 3.25
V
C
-Hysteresis Supply ramping up and down 0.15 0.2 0.25
V
Electrical Specifications
Unless otherwise specified, these specification apply over Vin=V
cc
=V
c
=12V, 0
o
C<T
j
(Ic)<105
o
C.
Typical values are specified at T
a
= 25
o
C.
Symbol Definition Min Max Units
V
in
Input Voltage 2.5 21
V
cc
Supply Voltage 4.5 14
V
c
Supply Voltage Vin + 5V 28
V
o
Output Voltage 0.6 12
V
I
o
Note1 Output Current 0 6 A
T
j
Junction Temperature -40 125
o
C