ZETEX ZXCT1030 Technical data

ZXCT1030 High-side current monitor with comparator

Description

The ZXCT1030 is a high side current sense monitor containing an internal reference and comparator with a non-latching output. Using this device eliminates the need to disrupt the ground plane when sensing a load current.

The wide input voltage range of 20V down to as low as 2.2V make it suitable for a range of applications. Dynamics and supply current are optimized for the processing of fast pulses, associated with switch mode applications.

Features

• Low cost, accurate high-side current sensing

• Output voltage scaling

• Up to 18V output

• 2.2V - 20V supply range

• Voltage reference on chip

• Comparator on chip

• SO8 package

Typical application circuit

Applications

• Battery chargers

• Electronic fuse

•DC motor control

• Over current monitor

• Power management

• Inrush current limiting

Ordering information

Device Status Package Device

marking

ZXCT1030X8TA Last time buy MSOP8 ZXCT1030 7 12 1000

ZXCT1030N8TA

Issue 3 - June 2007 1 www.zetex.com

Active SO8 ZXCT1030 7 12 500

Reel size

(inches)

Tape width

(mm)

Quantity

per reel

Absolute maximum ratings

Voltage on any pin -0.6V and V

Operating temperature -40 to 85°C Storage temperature -55 to 125°C Package power dissipation (T

amb

= 25°C)

MSOP8 500mW

CC

+0.6V

Recommended operating conditions

Parameter Min. Max. Unit

V

CC

V

SENSE+

V

SENSE

V

OUT

V

comp-in

T

amb

(a)

2.2 20 V

2.2 V

CC

V

10 500 mV

0V

SENSE

-1V V

0.005 10 V

-40 85 °C

Pin-out connections

ZXCT1030

V

SENSE-

V

SENSE+

GND

Pin name Function

V

CC

V

comp_out

V

OUT

Vref_out V

comp_in

CC

V

SENSE-

V

SENSE+

GND Ground V

comp_in

Supply voltage

Negative sense input

Positive sense input

Comparator input, usually a ratio of the

reference or other control signal Vref_out Reference output V

OUT

V

comp_out

Current monitor output voltage

Open collector comparator output

Issue 3 - June 2007 2 www.zetex.com

ZXCT1030

Electrical characteristics (ZXCT1030X8) - Test conditions T

R

comp

= 10kV, V

comp_supply

= 5V unless otherwise stated.

= 25°C, VIN = VCC = 15V,

amb

Symbol Parameter Conditions Limits Unit

Min. Typ. Max.

V

CC

V

SENSE+

V

OUT

R

OUT

V

OUT

T

C

I

CC

I

SENSE+

I

SENSE-

V

CM(min)

A

CC

Sense+ range 2.2 VCC

Output voltage V

Output resistance V

temperature coefficient

Supply current V

V

(b)

Accuracy V Gain V BW Bandwidth

range 2.2 20 V

CC

= 0V 0 2 10 mV

SENSE

OUT

SENSE+

V

SENSE-

input current 25 48 90 µA

input current V

Minimum active common mode voltage

OUT

/V

V

SENSE

V V V V V V

VCC =15V 2.8 V V V V

V V

= 10mV 88 100 112 mV

SENSE

= 30mV 284 300 316 mV

SENSE

= 50mV 480 500 520 mV

SENSE

= 100mV 970 1000 1030 mV

SENSE

= 500mV 4500 5000 5500 mV

SENSE

SENSE-

= 15V, V

OUT

= 1V

1.2 1.5 1.8 k⍀ 30 ppm/°C

= 15V 170 270 350 µA

SENSE-

= 14.9V 25 70 220 nA

SENSE-

comp_supply

comp_in

SENSE

= 5V

= V

REF

= 10mV =100mV -3 3 % = 100mV 9.7 10.0 10.3

=10mVp-p

= 100mVp-p

3 MHz 6 MHz

Comparator

V

comp_in

V

Hysteresis 15 mV

H

Input bias 5 80 150 nA

I

B

Propagation delay 100 ns

T

D

V

Output voltage low 30 150 200 mV

OL

V

OH

Output sink current VOL = 0.4V 2 mA

I

OL

I

OH

Input voltage 0.005 10 V

Output voltage high V

Output high leakage

comp_

supply

V

1.0 µA

current

Voltage reference

V

ref

delta V

Change in V

ref

Isource 5␮A to

ref

Reference current = +300

␮

A to -5␮A

1.200 1.240 1.280 V

10 mV

Isink 300␮A

T

30 ppm/°C

C

PSR Supply rejection 0.01 %/V

NOTES:

(a) V (b) Level of V

SENSE

= (V

) - (V

SENSE+

where comparator output defaults to 'off'.

SENSE+

SENSE

-)

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