LM3812MX-7.0 National Semiconductor, LM3812MX-7.0 Datasheet - Page 2

• Manufacturer Part Number: LM3812MX-7.0
• Description: IC CURRENT GAUGE 4% 8SOIC
• Manufacturer: National Semiconductor

Specifications of LM3812MX-7.0

• Function: Current Gauge
• Sensing Method: High-Side
• Accuracy: ±4%
• Voltage - Input: 2 ~ 5.25 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• For Use With: LM3812EVAL - BOARD EVALUATION LM3812
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Other names: *LM3812MX-7.0

www.national.com
Ordering Information
#
Mount package. Suffix X indicates that the part is available in
2.5k units on Tape and Reel.
* Current is sampled over a fixed interval. The average
current during this interval is indicated by the duty cycle of
the PWM output during next interval.
Pin Description (High-Side, LM3812)
Pin Description (Low-Side, LM3813)
Pin
Pin
Suffix M indicates that the part is available in Surface
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
LM3812M-1.0
LM3812MX-1.0
LM3812M-7.0
LM3812MX-7.0
LM3813M-1.0
LM3813MX-1.0
LM3813M-7.0
LM3813MX-7.0
Order No.
SENSE+, V
SENSE−
FLTR+
FLTR−
SD
PWM
GND
GND
SENSE+, GND
SENSE−
FLTR+
FLTR−
SD
PWM
GND
V
DD
#
Name
Name
DD
Sense
Range
±
±
±
±
±
±
±
±
1A
1A
7A
7A
1A
1A
7A
7A
Sampling
Interval*
High side of internal current sense, also supply voltage.
Low side of internal current sense.
Filter input — provides anti-aliasing for delta sigma modulator.
Filter input.
Shutdown pin. Connected to V
low, the IC goes into a low current mode (typically 3 µA).
PWM output indicates the current magnitude and direction.
Ground
Ground
High side of internal current sense, also ground.
Low side of internal current sense.
Filter input – provides anti-aliasing for delta sigma modulator.
Filter input.
Shutdown pin. Connected to V
low, the IC goes into a low current mode (typically 3 µA).
PWM output indicates the current magnitude and direction.
Ground
V
50 ms
50 ms
50 ms
50 ms
50 ms
50 ms
50 ms
50 ms
DD
(supply)
High-side
High-side
High-side
High-side
Sensing
Low-side
Low-side
Low-side
Low-side
Method
2
Number
Package
‡
ductor and indicates an 8-lead surface mount package,
SO-8.
M08A
M08A
M08A
M08A
M08A
M08A
M08A
M08A
The Package code M08A is internal to National Semicon-
NS
DD
DD
through a pull up resistor for normal operation. When
through a pull up resistor for normal operation. When
‡
Function
Function
Package
Type
SO-8
SO-8
SO-8
SO-8
SO-8
SO-8
SO-8
SO-8
95 units in Rails
2.5k units on Tape and Reel
95 units in Rails
2.5k units on Tape and Reel
95 units in Rails
2.5k units on Tape and Reel
95 units in Rails
2.5k units on Tape and Reel
Supplied As: