with Programmable Sense and Reset Delay Function

1 Features

• Wide supply voltage range: 2.7 V to 65 V

• SENSE and RESET pins are 65 V graded

• Low quiescent current: 1 µA (typical)

• Flexible and wide voltage threshold options

Table 13-1

– 2.7 V to 36 V (1.5% maximum accuracy)

– 800 mV option (1% maximum accuracy)

– Percentage options: 2% to 13% (1% steps)

2 V, 2.5 V

• Programmable reset time delay

– 10 nF = 12.8 ms, 10 μF = 12.8 s

• Programmable sense time delay

– 10 nF = 1.28 ms, 10 μF = 1.28 s

• Manual Reset (MR) feature

• Output reset latching feature

• Output topology: Open-Drain or Push-Pull

2 Applications

• Analog input module

• CPU (PLC controller)

• Servo drive control module

• Servo drive power stage module

• Servo drive functional safety module

• HVAC valve and actuator control

3 Description

The TPS37 is a family of wide input range and

low quiescent current window supervisors for fast

detection of overvoltage (OV) and undervoltage

(UV) conditions. Each device includes a precision

internal reference, two independent and configurable

voltage comparators and integrated resistor dividers.

The TPS37 can be connected directly to and

monitor 12 V / 24 V supply rails in a variety of

industrial applications including factory automation,

motor drives, building automation and others. Built-in

hysteresis on the SENSE pins prevents false reset

signals when monitoring a supply voltage rail.

The

separate

VDD

and

SENSE

pins

allow

redundancy

sought

by

high-reliability

systems.

SENSE is decoupled from VDD and can monitor

higher and lower voltages than VDD. Optional use

of external resistors are supported by the high

impedance input of the SENSE pins. CTSx and CTRx

pins allow delay adjustability on the rising and falling

edges of the RESET signals. Also, CTSx functions

as a debouncer by ignoring voltage glitches on the

monitored voltage rails; CTRx operates as a manual

reset (MR) that can be used to force a system reset.

TPS37 is available in a WSON or SOT-23 package.

The central pad is non-conductive to increase the

creepage between VDD and GND per guidelines in

Device Information

PART NUMBER

PACKAGE (1)

BODY SIZE (NOM)

TPS37

WSON (10) (DSK)

2.5 mm × 2.5 mm

TPS37

SOT-23 (14) (DYY) (2)

4.1 mm × 1.9 mm

(1)

For package details, see the mechanical drawing addendum

at the end of the data sheet.

(2)

Product Preview

MCU

RESET1

RESET2

SENSE1

SENSE2

VDD

VDD

TPS37

24V

Power Switch

or

DC/DC

LDO

SENSE1 = Overvoltage monitor

SENSE2 = Undervoltage monitor

EN

Typical Application Circuit

Supply Voltage (V)

0

5

10

15

20

25

30

35

40

45

50

55

60

65

0.50

0.55

0.60

0.65

0.70

0.75

0.80

0.85

0.90

0.95

TPS37

SNVSBJ1D – OCTOBER 2020 – REVISED DECEMBER 2021

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.