SC310 Datasheet, PDF (1/12 Pages) Semtech Corporation – High-Side Current-Sense Amplifier with Low Impedance Voltage Output

SC310
High-Side Current-Sense Amplifier
with Low Impedance Voltage Output
POWER MANAGEMENT
Description
Features
The SC310 is a high-side current sense amplifier ideal for
any application where precision current monitoring is
needed. Possible uses include battery-powered products
such as cellphones and notebooks, as well as industrial
and data acquisition applications. The wide 2.7V to 25V
common mode input range is independent of supply range,
providing complete flexibility in battery sensing applica-
tions.
The Current-Sense Amplifier offers three gain versions,
SC310A (gain 20 V/V), SC310B (gain 50 V/V) and
SC310C (gain 100 V/V). An external shutdown pin
(SHDN) enables turn off for the IC. A buffered output
with low impedance renders the overall gain immune to
load resistance. Output range is from 0V to Vcc - 1.7V.
Other features include tiny SOT-23-6 packaging, very low
supply current, and wide supply voltage range (3V to 25V).
The SC310 is rated for operation over the Industrial Tem-
perature range (-40°C to +125°C).
Three gain versions (20V/V, 50V/V, 100V/V)
available
2.7V to 25V input common mode range
3V to 25V supply voltage range
270 μA supply current
1% typical accuracy
Buffered low impedance voltage output
Industrial temperature range (-40°C to +125°C)
Small, lead-free SOT23-6 Package
Applications
Notebook and Tablet PCs
Data Acquisition
Battery Packs
Charging Applications
Industrial and Embedded Applications
Typical Application Circuit
2.7V to 25V
R_SENSE
I_LOAD
3V - 25V
0.1uF
VCC ^OUT
V_OUT
Load/
Battery
0.1uF
June 4, 2007
www.semtech.com
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