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Product details

Parameters

Number of supplies monitored 1 Threshold voltage 1 (Typ) (V) Trimmable, 1.6, 2.5, 2.7, 2.8, 2.9, 3.0, 3.1, 4.1, 4.2, 4.4, 4.5 Features Manual reset Reset threshold accuracy (%) 1.5 Output driver type/reset output Active-high, Active-low, Open-drain, Push-pull Time delay (ms) Programmable, 0 TI functional safety category Functional Safety-Capable Rating Automotive Watchdog timer WDI (sec) None Operating temperature range (C) -40 to 125 open-in-new Find other Supervisor & reset ICs

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 open-in-new Find other Supervisor & reset ICs

Features

  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C7B
  • Wide operating voltage : 1.5 V to 10 V
    • Use external resistors to extend Vin range
  • Nano supply current : 350 nA (Typ), 700 nA (Max)
  • Fixed threshold voltage (VIT-)
    • Threshold from 1.6 V to 4.9 V in 0.1-V steps
    • High accuracy: 1% (Typ), 1.5% (Max)
    • Built-in hysteresis (VIT+)
      • 1.6 V < VIT- ≤ 3.0 V = 100 mV (typical)
      • 3.1 V ≤ VIT- < 4.9 V = 200 mV (typical)
  • Fast start-up delay (tSTRT): 350 µs (Max)
  • Programmable capacitor-based reset time delay:
    • tD: 50 µs (no capacitor) to 6.2 s (10-µF)
  • Active-low manual reset (MR)
  • Three output topologies:
    • TPS3840DL-Q1: open-drain, active-low (RESET)
    • TPS3840PL-Q1: push-pull, active-low (RESET)
    • TPS3840PH-Q1: push-pull, active-high (RESET)
  • Package: 5-pin SOT-23 (DBV)

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Description

The TPS3840-Q1 family of voltage supervisors or reset ICs can operate at high voltage levels while maintaining very low quiescent current across the whole VDD and temperature range. TPS3840-Q1 offers best combination of low power consumption, high accuracy and low propagation delay (tp_HL= 30 µs typical).

Reset output signal is asserted when the voltage at VDD drops below the negative voltage threshold (VIT-) or when manual reset is pulled to a low logic (VMR_L). Reset signal is cleared when VDD rise above VIT- plus hysteresis (VIT+) and manual reset (MR) is floating or above VMR_H and the reset time delay (tD) expires. Reset time delay can be programmed by connecting a capacitor between CT pin and ground. For a fast reset CT pin can be left floating.

Additional features: Low power-on reset voltage (VPOR), built-in glitch immunity protection for MR and VDD, built-in hysteresis, low open-drain output leakage current (ILKG(OD)). TPS3840-Q1 is a perfect voltage monitoring solution for automotive applications and battery-powered / low power applications.

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Technical documentation

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No results found. Please clear your search and try again. View all 10
Type Title Date
* Datasheet TPS3840-Q1 Automotive Nano IQ Voltage Supervisor With MR and Programmable Delay datasheet (Rev. B) Apr. 30, 2020
White papers Streamlining Functional Safety Certification in Automotive and Industrial Jun. 09, 2020
White papers 자동차 및 산업 분야의 기능적 안전성 인증 간소화 Jun. 09, 2020
Application notes TPS3840-Q1 Functional Safety FIT Rate and Failure Mode Distribution Dec. 19, 2019
White papers Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun. 28, 2019
Application notes Implementing Voltage References and Supervisors Into Your Traction Inverter Desi May 22, 2019
Application notes Achieving Low IQ Voltage Supervision in Automotive, Wide-Vin Applications Jan. 24, 2019
User guides TPS3840EVM Voltage Supervisor User's Guide Dec. 03, 2018
Technical articles Automotive electronics design made easy Jul. 18, 2013
Technical articles John discusses benefits of LEDs in automobiles Jul. 16, 2013

Design & development

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Hardware development

EVALUATION BOARDS Download
document-generic User guide
20
Description

The TPS3840 evaluation module (EVM)  is a platform for evaluating the TPS3840 device, which is a nanopower voltage supervisor with manual reset and programmable reset delay. TPS3840 offers operation up to 10 V, while maintaining very-low quiescent current of 350 nA (typ) in addition to 1 (...)

Features
  • Manual reset
  • Programmable reset delay
  • Active-low/active-high output logic
  • Open-drain/push-pull output topology

Design tools & simulation

SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

REFERENCE DESIGNS Download
High efficiency, low-noise 5-V/3.3-V/1.8-V/1.1-V automotive display reference design
PMP22334 — This reference design is for an automotive display application with a customized form factor. The design demonstrates the excellent thermal performance of LM61460-Q1 with its HotRod™ QFN package as well as the low EMI aided by its spread spectrum feature. It generates four (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 5 View options

Ordering & quality

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