1 Features

? AEC-Q100 qualified with the following results:

– Device temperature grade 1: –40°C to +125°C

ambient operating temperature TA

– Device HBM ESD classification level 2

– Device CDM ESD classification level C7B

? Functional Safety - Capable

– Documentation available to functional safety

system design

? 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 11-1

– 2.7 V to 36 V (1.5 maximum accuracy)

– 800 mV option (1 maximum accuracy)

? Built-in hysteresis (VHYS)

– Percentage options: 2 to 13 (1 steps)

– Fixed options: VTH < 8 V = 0.5 V, 1 V, 1.5 V,

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 topology: Open-Drain or Push-Pull

2 Applications

? Telematics control unit

? Emergency call system

? Audio amplifier

? Head unit and cluster

? Sensor fusion and cameras

? Body control module

3 Description

The TPS37-Q1 is a 65 V input voltage detector with

1 μA IDD, 1 accuracy, and with a fast 10 μs detection

time. This device can be connected directly to

12 V / 24 V automotive battery system for continuous

monitoring of over (OV) and under (UV) voltage

conditions; with its internal resistor divider, it offers the

smallest total solution size. Wide hysteresis voltage

options are available to ignore cold crank, start-stop

and various car battery voltage transients. 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 automotive

systems and SENSE 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-Q1 is available in WSON or SOT-23 package.

The WSON package has wettable flanks allowing

the facilitation for Automatic Optical Inspection (AOI)

and low resolution X-ray inspection. The central pad

is non-conductive to increase the creepage between

VDD and GND per guidelines in IEC60664.