GPIO

GPIO

Processor

DAC

GPIO

0.1 µF

2.7 V to 5.5 V

Power Supply

(0 V to 36 V)

Load

10 k

IN+

IN

+

±

CMP

LIMIT

LATCH

DELAY

ALERT

INA300

GND

ENABLE

HYS

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

INA300

SBOS613B – FEBRUARY 2014 – REVISED APRIL 2016

INA300 Overcurrent-Protection, Current-Sense Comparator

1

1 Features

1

•

Wide Common-Mode Range: 0 V to 36 V

•

Selectable Response Times:

–

10 µs, 50 µs, 100 µs

•

Programmable Threshold:

–

Adjust Using Single Resistor

–

Programmable From 0 mV to 250 mV

•

Accuracy:

–

Offset Voltage: ±500

μV (Max)

–

Offset Voltage Drift: 0.5

μV/°C (Max)

•

Selectable Hysteresis:

–

2 mV, 4 mV, 8 mV

•

Active Quiescent Current: 135

μA (Max)

•

Selectable Disable Mode

–

Disabled Quiescent Current: 3.5

μA (Max)

–

Disabled Input Bias Current: 500 nA (Max)

•

Open-Drain Output with Latch Mode Available

2 Applications

•

Overcurrent Protection

•

Computers

•

Servers

•

Telecom Equipment

•

Power Supplies

•

Battery Chargers

3 Description

Designed for overcurrent protection applications, the

INA300 is a current-sensing comparator that detects

overcurrent by measuring the voltage developed

across a shunt resistor, and comparing that voltage to

the

threshold

voltage

input

level.

The

device

measures this differential voltage signal on common-

mode voltages that can vary from 0 V up to 36 V,

independent of the supply voltage. The device

features an adjustable threshold range that is set

using

a

single

external

limit-setting

resistor.

A

selectable

hysteresis

feature

enables

adjustable

operation of the comparator to accommodate the

wide input signal range of 0 mV to 250 mV.

An open-drain alert output on the device can be

configured to operate in either a transparent mode

where the output status follows the input state, or in a

latched mode where the alert output is cleared when

the latch is cleared. The device response time setting

is selectable, which enables overcurrent alerts to be

issued in as fast as 10 µs.

This device operates from a single 2.7-V to 5.5-V

supply, drawing a maximum supply current of 135 µA.

The device is specified over the extended operating

temperature range of –40°C to +125°C, and is

available in WSON-10 and VSSOP-10 packages.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA300

WSON (10)

2.00 mm × 2.00 mm

VSSOP (10)

3.00 mm × 3.00 mm

(1) For all available packages, see the package option addendum

at the end of the data sheet.

Typical Application