Temperature (qC)

-50

-25

0

25

50

75

100

125

-0.75

-0.5

-0.25

0

0.25

0.5

0.75

D001

Unit 1

Unit 2

Unit 3

Unit 4

Unit 5

Avg

TPS389012-Q1

RESET

VDD

GND

SENSE

1.8 V

Microcontroller

MR

1.2 V

RESET

GND

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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.

TPS3890-Q1

SBVS303A – MARCH 2017 – REVISED OCTOBER 2017

TPS3890-Q1

Low Quiescent Current, 1% Accurate Supervisor with Programmable Delay

1

1 Features

1

•

Qualified for Automotive Applications

•

Power-On-Reset (POR) Generator with Adjustable

Delay Time: 25 μs to 30 s

•

Very Low Supply Current: 2.1 μA (Typical)

•

High Threshold Accuracy: 1% (max)

•

Precision Hysteresis

•

Fixed and Adjustable Threshold Voltages:

–

Fixed Thresholds for Standard Rails:

1.2 V to 5 V

–

Adjustable Down to 1.15 V

•

Manual Reset (MR) Input

•

Open-Drain RESET Output

•

Temperature Range: –40°C to +125°C

•

Package: 1.5-mm × 1.5-mm WSON

2 Applications

•

Automotive Vision Systems

•

Automotive RADAR Systems

•

Automotive Infotainment Systems

•

Body Electronics

•

Cluster Electronics

3 Description

The TPS3890-Q1 is a precision voltage supervisor

with low-quiescent current that monitors system

voltages as low as 1.15 V, asserting an open-drain

RESET signal when the SENSE voltage drops below

a preset threshold or when the manual reset (MR) pin

drops to a logic low. The RESET output remains low

for the user-adjustable delay time after the SENSE

voltage and manual reset (MR) return above the

respective thresholds. The TPS3890-Q1 family uses

a precision reference to achieve 1% threshold

accuracy. The reset delay time can be user-adjusted

between 25 μs and 30 s by connecting the CT pin to

an external capacitor. The TPS3890-Q1 has a very

low quiescent current of 2.1 μA and is available in a

small 1.5-mm × 1.5-mm package, making the device

well-suited

for

battery-powered

and

space-

constrained applications. The device is fully specified

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS3890-Q1

WSON (6)

1.50 mm × 1.50 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

SPACE

SPACE

SPACE

SPACE

SPACE

SPACE

SPACE

Typical Application Circuit