TMP390 Ultra-Small, Dual-Channel (Hot and Cold Trip), 0.5-µA, Resistor-

Programmable Temperature Switch

1 Features

• Resistor programmable temperature trip points

and hysteresis options

– Resistor tolerances contribute zero error

– Hysteresis options: 5°C, 10°C and 20°C

• Separate outputs for overtemperature or

undertemperature detection

– Channel A (overtemperature): +30 to +124°C,

2°C steps

– Channel B (undertemperature): –50 to +25°C,

5°C steps

• Accuracy level options (maximum at −55°C to

+130°C):

– A2 Level: ±3.0°C (±1.5°C from 0°C to +70°C)

– A3 Level: ±3.5°C (±2.0°C from 0°C to +70°C)

• Ultra-low power consumption: 0.5 µA typical at

25°C

• Supply voltage: 1.62 to 5.5 V

• Open-drain outputs

• Trip test function enables in-system testing

• Available in a SOT-563 (1.60-mm × 1.20-mm),

6-pin package

2 Applications

• DC/AC inverter

• DC/DC converter

• Temperature transmitters

• Environmental control systems (ECS)

• Power tools

• Power banks

• Wireless infrastructure

– WLAN/Wi-Fi access points

– Core routers

– Edge routers

– Macro remote radio units (RRU)

RSETA

RSETB

VDD

VDD or VDDIO

TMP39x

RP

RP

SETA

SETB

OUTA

OUTB

Optional Trip

Test

RSETA and RSETB select trip

thresholds and hysteresis options.

Simplified Schematic

3 Description

The TMP390 device is part of a family of ultra-

low power, dual channel, resistor programmable

temperature switches that enable protection and

detection of system thermal events from –50°C

to

130°C.

The

TMP390

offers

independent

overtemperature (hot) and undertemperature (cold)

detection . The trip temperatures (TTRIP) and thermal

hysteresis (THYST) options are programmed by two

E96-series resistors (1% tolerance) on the SETA and

SETB pins. Channel A resistors can range from 1.05

KΩ to 909 KΩ, representing one of 48 unique values.

Channel B resistors can range from 10.5 KΩ to 909

KΩ

The value of the resistor to ground on SETA input

sets the TTRIP threshold of Channel A. The value

of the resistor to ground on SETB input sets the

TTRIP threshold of Channel B, as well as the THYST

options of 5°C, or 10°C for both channels, to prevent

undesired digital output switching. When the SETB

input is connected to ground, Channel A operates with

20°C hysteresis. Resistors accuracy has no impact to

TTRIP accuracy.

To enable customer board-level manufacturing, the

TMP390 supports a trip test function where the digital

outputs are activated by exercising the SETA or SETB

pin.

Device Information

PART

NUMBER

PACKAGE

(1)

BODY SIZE (NOM)

TMP390

SOT-563 (6)

1.60 mm × 1.20 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

Device Comparison

PART NUMBER

FUNCTION

OUTPUT TYPE

TMP390

Hot / Cold

Open-Drain

TMP392

Hot / Warm

TMP390

SBOS904A – MAY 2019 – REVISED AUGUST 2020

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.