ir3831 International Rectifier Corp., ir3831 Datasheet - Page 5

• Manufacturer Part Number: ir3831
• Description: Synchronous Buck Regulator For Ddr Applications
• Manufacturer: International Rectifier Corp.

Electrical Specifications
Unless otherwise specified, these specification apply over 4.5V< V
0
Recommended Operating Conditions
V
V
Boot to SW
V
I
Fs
T
o
Power Loss
Power Loss
MOSFET R
Top Switch
Bottom Switch
Supply Current
V
V
o
Under Voltage Lockout
V
V
V
Enable-Start-Threshold
Enable-Stop-Threshold
Enable-Hysteresis
Enable leakage current
C<T
02/20/09
CC
cc
j
in
cc
o
Symbol
CC
CC
CC
Supply Current (Dyn)
-Start-Threshold
-Stop-Threshold
-Hysteresis
Supply Current (Standby)
j
< 125
Parameter
ds(on)
o
C. Typical values are specified at T
Input Voltage
Supply Voltage
Supply Voltage
Output Voltage
Output Current
Switching Frequency
Junction Temperature
V
V
Vcc-Hys
Enable_UVLO_Start
Enable_UVLO_Stop
Enable_Hys
Ien
Definition
CC
CC
_UVLO_Start
_UVLO_Stop
Symbol
R
I
R
CC(Standby)
I
ds(on)_Top
ds(on)_Bot
CC(Dyn)
P
loss
Vcc=5V, V
Fs=400kHz, L=0.6uH, Note4
V
V
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
=5V, I
-V
sw
D
=5V, I
=10A, Tj=
a
Test Condition
in
= 25
=12V, V
D
=10A, Tj=
25
o
Min
225
4.5
4.5
-40
1.5
0.6
C.
o
o
0
=0.75V, I
C
25
o
C
o
=8A,
cc
<5.5V, Vp=0.6V, V
Min
4.06
3.76
0.25
1.14
0.16
0.9
0.90*Vin
Max
1650
125
5.5
5.5
16
8
TYP
1.28
16.7
4.26
3.96
IR3831MPbF
8.7
0.3
1.2
1.0
0.2
12
in
MAX
=12V,
4.46
4.16
0.38
1.36
1.06
0.24
500
23
12
18
Units
kHz
o
V
A
Units
C
mΩ
mA
μA
μA
W
V
5