zxct1011 Zetex Semiconductors plc., zxct1011 Datasheet - Page 7

• Manufacturer Part Number: zxct1011
• Description: Zxct1011 - High-side Low Drift Current Monitor
• Manufacturer: Zetex Semiconductors plc.

Application information (cont.)
Minimum operating voltage
The minimum operating voltage of the ZXCT1011 is 2.5V and is defined as the difference between
V
the device when considering R
Figure 2 Considerations for supply rail
At low supply voltages and high Vsense measurements, special care must be taken to ensure the
correct operation.
The circuit in figure 2.0 shows a ZXCT1011 operating from 10V supply rail. The minimum
operating voltage of the ZXCT1011 is 2.5V. This allows a maximum output voltage of 7.5V to be
set at V
usable supply voltage graph on page 4.
Issue 1- July 2005
© Zetex Semiconductors plc 2005
V
R shunt
sense+
120R
in
= 10V
out
and the I
. A 3k resistor on the output would draw a maximum 2.5mA from Iout. - See minimum
3
out
R
V
shunt
sense+
pin. It must be ensured that sufficient headroom is given for the operation of
5
R
ZXCT
1011
I
sense
out
2
V
3.3K
sense-
4
out
.
V
Voltage across device 2.5V
V
Where V
in
out
To
- V
out
load
out
2.5V
R
7
= I
out
x R
out
ZXCT1011
www.zetex.com