Absolute maximum ratings, Operating ratings, Electrical characteristics – Rainbow Electronics LM3822 User Manual
Page 3: Lm3822-1.0, Lm3822-2.0, Common device parameters
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Absolute Maximum Supply Voltage
5.5V
Power Dissipation
ESD Susceptibility (Note 3)
1.5 kV
Sense Current (peak, for 200 msec) (Note 4)
10A
Sink Current for PWM pin
1mA
Maximum Junction Temperature
150˚C
Storage Temperature
−65˚C to +150˚C
Lead Temperature (Soldering, 10 sec)
260˚C
Operating Ratings
Input Voltage
2.0V to 5.25V
Sense Current (continuous) (Note 4)
5A
Junction Temperature Range
−40˚C to +85˚C
Electrical Characteristics
Typical numbers are at 25˚C and represent the most likely parametric norm.
Specifications in standard type face are for T
J
= 25˚C and those with boldface type apply over full operating temperature
ranges.
LM3822-1.0
SENSE+V
DD
= 3.6V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is 0.1 µF.
Symbol
Parameter
Conditions
Typ
Limit
Units
I
ACC
Average Current Accuracy
1.0A current
1.0
A
0.98 / 0.96
A (min)
1.02 / 1.04
A (max)
e
n
Effective Output Noise (rms)
2
mA
LM3822-2.0
SENSE+V
DD
= 3.6V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is 0.1 µF.
Symbol
Parameter
Conditions
Typ
Limit
Units
I
ACC
Average Current Accuracy
2.0A current (Note 8)
2.0
A
1.94 / 1.90
A (min)
2.06 / 2.10
A (max)
e
n
Effective Output Noise (rms)
6
mA
Common Device Parameters
Unless otherwise specified, V
DD
= 3.6V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is
0.1 µF.
Symbol
Parameter
Conditions
Typ
Limit
Units
I
Q1
Quiescent Current
Normal Mode, SD = high
95
µA
150
µA (max)
I
Q2
Quiescent Current
Shutdown Mode, SD = low
1.8
µA
10
µA (max)
D
RES
PWM Resolution
0.1
%
t
S
Sampling Time
50
ms
40
ms (min)
80
ms (max)
f
P
Frequency of PWM Waveform
20
Hz
12.5
Hz (min)
25
Hz (max)
V
TH
Threshold High Level for SD
1.3
V
1.8
V (min)
LM3822
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