ir3840 International Rectifier Corp., ir3840 Datasheet - Page 6

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

Electrical Specifications (continued)
Unless otherwise specified, these specification apply over 4.5V< V
Typical values are specified at T
Rt Voltage
Error Amplifier
Over Current Protection
OCSET Current
OC Comp Offset Voltage
SS off time
Bootstrap Diode
Forward Voltage
Frequency
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
02/09/09
Parameter
Isource(E/A)
Vss(clamp)
SS_Hiccup
Ramp (os)
Symbol
Dmin(ctrl)
Vmax(E/A)
Isink(E/A)
Vmin(E/A)
IFb(E/A)
IVp(E/A)
V
Vramp
Dmax
GBWP
I
OCSET
OFFSET
Vos
Gain
ISS
F
SR
SD
S
a
= 25
Rt=59K
Rt=28.7K
Rt=9.31K, Note4
Note4
Note4
Note4
Note4
Fs=250kHz
Vfb-Vseq,
Vseq=0.8V
Note4
Note4
Note4
Vcc=4.5V
Note4
Source
Fs=250kHz
Fs=500kHz
Fs=1500kHz
Note4
I(Boot)=30mA
o
C.
Test Condition
0.665
1350
Min
0.40
20.8
225
450
136
180
-10
2.7
-10
100
92
14
43
-1
-1
3.4
20
8
7
0
cc
TYP
1500
4096
<5.5V, V
23.6
48.8
0.85
250
500
130
154
260
3.0
0.7
1.8
0.6
20
50
10
12
110
120
3.5
0
30
0
MAX
0.735
1650
26.4
54.6
+10
172
+10
470
275
550
200
1.2
3.3
0.3
+1
+1
120
220
26
13
20
3.7
40
in
1
=12V, 0
IR3840MPbF
o
C<T
Units
Cycles
Vp-p
V/μs
kHz
mV
mA
MHz
mV
mV
μA
μA
μA
ns
mV
%
dB
V
V
V
V
V
j
< 125
o
C.
6