ir3831 International Rectifier Corp., ir3831 Datasheet - Page 6

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

Electrical Specifications (continued)
Unless otherwise specified, these specification apply over 4.5V< V
0
o
Rt Voltage
Error Amplifier
Over Current Protection
OCSET Current
OC Comp Offset Voltage
SS off time
Bootstrap Diode
Forward Voltage
Frequency
C<T
Oscillator
Ramp Amplitude
Ramp Offset
Min Pulse Width
Fixed Off Time
Max Duty Cycle
Input Offset Voltage
Input Bias Current
Input Bias Current
Sink Current
Source Current
Slew Rate
Gain-Bandwidth Product
DC Gain
Maximum Voltage
Minimum Voltage
Common Mode Voltage
Soft Start/SD
Soft Start Current
Soft Start Clamp Voltage
Shutdown Output
Threshold
02/20/09
Parameter
j
< 125
o
C. Typical values are specified at T
Isource(E/A)
Vss(clamp)
SS_Hiccup
Ramp (os)
Symbol
Dmin(ctrl)
Isink(E/A)
Vmax(E/A)
Vmin(E/A)
IFb(E/A)
IVp(E/A)
V
Vramp
Dmax
GBWP
I
OCSET
OFFSET
Vos
Gain
ISS
SR
SD
F
S
Rt=59K
Rt=28.7K
Rt=9.31K, Note4
Note4
Note4
Note4
Note4
Fs=250kHz
Vfb-Vp
Vp=0.6V
Note4
Note4
Note4
Vcc=4.5V
Note4
Source
Fs=250kHz
Fs=500kHz
Fs=1500kHz
Note4
I(Boot)=30mA
Test Condition
a
= 25
o
C.
0.625
1350
Min
0.40
20.8
225
450
136
180
-10
2.7
92
100
14
43
3.4
-5
-1
-1
8
20
7
0
cc
<5.5V, Vp=0.6V, V
TYP
4096
1500
0.85
23.6
48.8
154
260
250
500
130
0.7
1.8
0.6
3.0
110
120
20
50
10
12
3.5
0
30
0
MAX
0.775
1650
26.4
54.6
172
+10
470
275
550
200
3.3
0.3
+5
+1
+1
12
13
20
120
220
26
3.7
40
1
IR3831MPbF
in
=12V,
Units
Cycles
Vp-p
V/μs
kHz
MHz
mV
mA
mV
mV
μA
μA
μA
ns
mV
%
dB
V
V
V
V
V
6