SNVSB03D December   2018  – January 2020

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application Circuit
      2.      TPS3840 Typical Supply Current
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Input Voltage (VDD)
        1. 8.3.1.1 VDD Hysteresis
        2. 8.3.1.2 VDD Transient Immunity
      2. 8.3.2 User-Programmable Reset Time Delay
      3. 8.3.3 Manual Reset (MR) Input
      4. 8.3.4 Output Logic
        1. 8.3.4.1 RESET Output, Active-Low
        2. 8.3.4.2 RESET Output, Active-High
    4. 8.4 Device Functional Modes
      1. 8.4.1 Normal Operation (VDD > VDD(min))
      2. 8.4.2 VDD Between VPOR and VDD(min)
      3. 8.4.3 Below Power-On-Reset (VDD < VPOR)
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design 1: Dual Rail Monitoring with Power-Up Sequencing
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Design 2: Battery Voltage and Temperature Monitor
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
      3. 9.2.3 Design 3: Fast Start Undervoltage Supervisor with Level-shifted Input
        1. 9.2.3.1 Design Requirements
        2. 9.2.3.2 Detailed Design Procedure
      4. 9.2.4 Design 4: Voltage Monitor with Back-up Battery Switchover
        1. 9.2.4.1 Design Requirements
        2. 9.2.4.2 Detailed Design Procedure
      5. 9.2.5 Application Curve: TPS3840EVM
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Nomenclature
    2. 12.2 Support Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

6 Pin Configuration and Functions

DBV Package
5-Pin SOT-23
TPS3840PL, TPS3840DL Top View
TPS3840 pinout-TPS3840PL-DBV-pkg-SNVSB03.gifFigure 2. Pin Configuration TPS3840PL, TPS3840DL
DBV Package
5-Pin SOT-23
TPS3840PH Top View
TPS3840 pinout-TPS3840PH-DBV-pkg-SNVSB03.gifFigure 3. Pin Configuration TPS3840PH

Pin Functions

PIN I/O DESCRIPTION
NAME TPS3840PL, TPS3840DL TPS3840PH
RESET N/A 1 O Active-High Output Reset Signal: This pin is asserted to logic high when either the MR pin is pulled to a logic low or VDD voltage falls below the negative voltage threshold (VIT-). When both MR is floating or above VMR_H and VDD voltage rises above VIT+, RESET remains asserted to logic high (asserted) for the reset time delay (tD) before releasing back to logic low.
RESET 1 N/A O Active-Low Output Reset Signal: This pin is asserted to logic low when either the MR pin is pulled to a logic low or the VDD voltage falls below the negative voltage threshold (VIT-). When both MR is floating or above VMR_H and VDD voltage rises above VIT+, RESET remains asserted to logic low for the reset time delay (tD) before releasing back to logic high.
VDD 2 2 I Input Supply Voltage. TPS3840 monitors VDD voltage
GND 3 3 _ Ground
MR / NC 4 4 I Manual Reset. Pull this pin to a logic low (VMR_L) to assert a reset signal at the RESET/RESET pin. If the MR pin is left floating or pulled to VMR_H, the output releases to the nominal state after the reset time delay (tD) expires. MR can be left floating when not in use. NC stands for "No Connection" or floating.
CT 5 5 - Capacitor Time Delay Pin. The CT pin offers a user-programmable reset delay time. Connect an external capacitor on this pin to adjust the reset time delay. When not in use, leave pin floating for the smallest fixed reset time delay.
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