Issue 1- July 2005

1

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© Zetex Semiconductors plc 2005

ZXCT1011

High-side low drift current monitor

Description

The ZXCT1011 is a high side current sense monitor. Using this type of device eliminates the need

to disrupt the ground plane when sensing a load current.

The ZXCT1011 takes the voltage developed across a current shunt resistor and translates it into a

proportional output current.

A user defined output resistor scales the output current into a ground referenced voltage.

A current reference resistor, external to the IC, results in an improved temperature coefficient

compared to the ZXCT1009.

The wide input voltage range of 20V down to as low as 2.5V make it suitable for a range of

applications. With a minimum operating current of just 4uA, combined with its SOT23-5 package

make it suitable for portable battery equipment too.

Features

■ Accurate high-side current sensing

■ 2.5V to 20V supply range

■ 4 µA quiescent current

■ 1% typical accuracy

■ Package SOT23-5

■ Temperature range -40 to 125°C

Applications

■ Automotive current measurement

■ Battery management

■ DC motor and solenoid control

■ Over current monitor

■ Power management

Typical application circuit

Pin connections

Ordering information

Vin

Load

V

ZXCT1011

GND

120

Ω

5

4

2

3

Rout

N/C

Order code

Pack

Part

mark

Reel Size

inches (mm)

Tape width

Quantity Per

reel

ZXCT1011E5TA

SOT23-5

1011

7 (180)

8mm

3,000