LM3812M-1.0 National Semiconductor, LM3812M-1.0 Datasheet - Page 3

• Manufacturer Part Number: LM3812M-1.0
• Description: Precision Current Gauge IC with Ultra Low Loss Sense Element and PWM Output
• Manufacturer: National Semiconductor

I
e
I
e
I
I
D
t
f
V
V
Symbol
Symbol
Symbol
ACC
ACC
Q1
Q2
S
P
V
n
V
n
Unless otherwise specified, V
0.1 µF.
TH
TL
RES
LM3812-1.0, LM3813-1.0
LM3812-7.0, LM3813-7.0
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.
Electrical Characteristics
DD
DD
Absolute Maximum Supply Voltage
Power Dissipation
ESD Susceptibility (Note 3)
Sense Current (peak, for 200 msec) (Note 4)
Sink Current for PWM pin
Voltage on Pin 5
= 5.0V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is 0.1 µF.
= 5.0V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is 0.1 µF.
Average Current Accuracy
(Note 7)
Effective Output Noise (rms)
Average Current Accuracy
(Note 7)
Effective Output Noise (rms)
Quiescent Current
Quiescent Current
PWM Resolution
Sampling Time
Frequency of PWM Waveform
Threshold High Level for SD
Threshold Low Level for SD
Parameter
Parameter
Parameter
DD
= 5.0V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is
at 0.9A current
at 2.5A current (Note 8)
Normal Mode, SD = high
Shutdown Mode, SD = low
(Note 1)
(Note 2)
1.5 kV
5.25V
5.5V
1mA
10A
Conditions
Conditions
Conditions
3
Operating Ratings
Maximum Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10 sec)
Input Voltage
Sense Current (continuous) (Note 4)
Junction Temperature Range
(Note 5)
(Note 5)
(Note 5)
Typ
Typ
Typ
100
0.9
2.5
2.5
0.1
1.2
1.3
20
52
20
2
(Note 1)
0.882 / 0.864
0.918 / 0.936
2.400 / 2.350
2.600 / 2.650
(Note 6)
(Note 6)
(Note 6)
Limit
Limit
Limit
12.5
160
1.8
0.7
10
40
80
25
−40˚C to +125˚C
−65˚C to +150˚C
2.0V to 5.25V
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ms (max)
µA (max)
µA (max)
Hz (max)
ms (min)
Hz (min)
A (max)
A (max)
V (max)
A (min)
A (min)
V (min)
150˚C
260˚C
Units
Units
Units
mA
mA
ms
µA
µA
Hz
%
A
A
V
V
7A