ir3840 International Rectifier Corp., ir3840 Datasheet - Page 5

• Manufacturer Part Number: ir3840
• Description: Integrated 12a Synchronous Buck Regulator
• Manufacturer: International Rectifier Corp.

Electrical Specifications
Unless otherwise specified, these specification apply over 4.5V< V
Typical values are specified at T
Recommended Operating Conditions
V
V
Boot to SW
V
I
Fs
T
o
j
in
cc
o
Power Loss
Power Loss
MOSFET R
Top Switch
Bottom Switch
Reference Voltage
Feedback Voltage
Accuracy
Supply Current
V
V
02/09/09
Symbol
Under Voltage Lockout
V
V
V
Enable-Start-Threshold
Enable-Stop-Threshold
Enable-Hysteresis
Enable leakage current
cc
cc
cc
cc
cc
Supply Current (Dyn)
-Start-Threshold
-Stop-Threshold
-Hysteresis
Supply Current (Standby)
Parameter
ds(on)
Input Voltage
Supply Voltage
Supply Voltage
Output Voltage
Output Current
Switching Frequency
Junction Temperature
Definition
V
V
Vcc-Hys
Enable_UVLO_Start
Enable_UVLO_Stop
Enable_Hys
Ien
CC
CC
_UVLO_Start
_UVLO_Stop
Symbol
R
R
I
CC(Standby)
ds(on)_Top
I
a
ds(on)_Bot
CC(Dyn)
P
V
= 25
loss
FB
o
C.
Vcc=5V, V
Fs=600kHz, L=0.6uH, Note4
V
V
0
-40
SS=0V, No Switching, Enable low
SS=3V, Vcc=5V, Fs=500kHz
Enable high
Vcc Rising Trip Level
Vcc Falling Trip Level
Supply ramping up and down
Supply ramping up
Supply ramping down
Supply ramping up and down
Enable=3.3V
Boot
cc
o
C<Tj<125
=5V, I
o
C<Tj<125
-V
sw
D
=5V, I
=14A, Tj=25
Test Condition
in
=12V, V
o
C
D
o
C,
=14A, Tj=25
Min
225
1.5
4.5
4.5
0.7
-40
0
Note3
o
0
=1.8V, I
C
0
C
o
=12A,
cc
<5.5V, V
0.9*Vin
Min
4.06
3.76
0.25
1.14
0.16
-1.0
-2.0
0.9
Max
1650
125
5.5
5.5
16
12
in
=12V, 0
IR3840MPbF
TYP
4.26
3.96
2.6
8.3
5.9
0.7
0.3
1.2
1.0
0.2
15
o
C<T
MAX
12.0
+1.0
+2.0
4.46
4.16
0.38
1.36
1.06
0.25
500
j
8.0
18
< 125
Units
kHz
o
V
A
C
o
C.
Units
mΩ
mA
uA
uA
W
%
V
V
5