LTC2955

RECOMMENDED FOR NEW DESIGNS

Pushbutton On/Off Controller with Automatic Turn-On

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Overview

  • Automatic Turn-On Via Voltage Monitor Input
  • Wide Input Supply Range: 1.5V to 36V
  • Low Supply Current: 1.2μA
  • ±25kV ESD HBM on PB Input
  • ±36V Wide Input Voltage for PB Input
  • Low Leakage EN Output Allows DC/DC Converter Control (LTC2955-1)
  • High Voltage EN Output Drives External P-Channel MOSFET (LTC2955-2)
  • Simple Interface Allows Graceful μP Shutdown
  • Adjustable Turn-Off Timer
  • 10-Lead 3mm × 2mm DFN and 8-Lead ThinSOT™ Packages
LTC2955
Pushbutton On/Off Controller with Automatic Turn-On
Automatic Turn-On with Power-Fail Indication Pushbutton On/Off with Interrupt Product Package 1 Product Package 2
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Documentation

Data Sheet 1

User Guide 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Battery Monitors & Fuel Gauges 1
LTC2942-1
Obsolete 1A Battery Gas Gauge with Internal Sense Resistor and Temperature/Voltage Measurement
Circuit Monitors 1
LTC2960
RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
Ideal Diodes and PowerPath Controllers 1
LTC4412HV
RECOMMENDED FOR NEW DESIGNS 36V, Low Loss PowerPath™ Controller in ThinSOT
Oscillators 1
LTC6991
PRODUCTION TimerBlox: Resettable, Low Frequency Oscillator
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC2955-1
  • LTC2955-2
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
schematic 4
schematic 5
schematic 6
DC1836A-B

LTC2955IDDB-2 | Pushbutton On/Off Controller with Automatic Turn On (EN Output)

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Product Details

DC1836A-B: Demo Board for the LTC2955 Pushbutton On/Off Controller with Automatic Turn-On.

eval board
schematic 7
schematic 8
schematic 9
schematic 10
schematic 11
schematic 12
DC1836A-A

LTC2955IDDB-1 | Pushbutton On/Off Controller with Automatic Turn On (EN Output)

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Product Details

DC1836A-A: Demo Board for the LTC2955 Pushbutton On/Off Controller with Automatic Turn-On.

eval board
schematic 13
schematic 14
schematic 15
AD-SYNCHRONA14-EBZ

Multichannel System Clocking Device

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Features and Benefits

Processing System

  • Raspberry Pi 4, ARM Cortex-A72, 2GB SDRAM

User Interfaces

  • Gigabit Ethernet
  • 2 × USB 3.0 ports
  • 2 × USB 2.0 ports
  • SPI interface
  • GPIO
  • 2 bicolor LEDs
  • Male pin header

Clock Processing Devices

  • HMC7044 (High Performance, 3.2 GHz, 14-Output Jitter Attenuator)
  • AD9545 (1 PPS Synchronizer and Adaptive Clock Translator)

Clock Outputs

  • 4 x TWINAX LVPECL AC&DC coupled, 100Ω diff
  • 2 x SMA LVPECL AC coupled*
  • 4 x SMA CMOS*
  • 4 x SMA LVDS AC coupled*

*Configurable differential outputs, 50Ω diff

Clock Inputs

  • 3 differential 100Ω SMA clock inputs
  • PPS input
  • SYNC input
  • 10MHz input

Internal references

  • 100Mhz and 122.88Mhz Ultra-Low Phase Noise VCXO's (-165dBc/Hz)
  • 40Mhz and 38.4Mhz TCXO's (±1ppm) 50MHz OCXO(+/- 10ppb)
  • Internal references are software configurable

Power supply

  • DC 12V, 3A barrel jack

Product Details

The AD-SYNCHRONA14-EBZ is an ideal self-contained device to use in evaluation and prototyping of applications that need a highly accurate frequency and phase-controlled source clock. It is designed around the Analog Devices AD9545 and HMC7044 and greatly simplifies clock distribution and multi-channel synchronization in complex systems. It is intended to be used by trained professionals in a laboratory environment, and not intended as an end product for commercial use. It can be taken as a complete reference design and customised as required for any end customer applications. Full design details are made available free of charge.

The AD-SYNCHRONA14-EBZ comes in a 1U mechanical form factor. Using popular industry connector SMA and TwinAX interfaces most labs will already have the needed cables.

With its internal OCXO it can operate in standalone mode or be fed from a choice of external sources, such as 3 separate high speed differential clock inputs, a 10MHz reference and 1PPS. This flexibility combined with the capability to select either of the internal VCXO options of 100MHz or 122.88MHz, gives almost unlimited choice for the frequency of interest and accuracy needed for a wide variety of application areas. 

APPLICATIONS

  • High accuracy reference clock distribution
  • Systems clocked from a single source
  • Clocks derived from 100MHz or 122.88MHz
  • Phased Array Systems, RADAR, EW, SATCOMS, SDR
  • Bench Equipment
  • Remote controlled operation
DC1836A-B
LTC2955IDDB-2 | Pushbutton On/Off Controller with Automatic Turn On (EN Output)
DC1836A-B Demo Board DC1836A-B Demo Board DC1836A-B Demo Board DC1836A-B Demo Board DC1836A-B Demo Board DC1836A-A - Schematic
DC1836A-A
LTC2955IDDB-1 | Pushbutton On/Off Controller with Automatic Turn On (EN Output)
DC1836A-A Demo Board DC1836A-A Demo Board DC1836A-A Demo Board DC1836A-A Demo Board DC1836A-A Demo Board DC1836A-A - Schematic
AD-SYNCHRONA14-EBZ
Multichannel System Clocking Device
AD-SYNCHRONA14-EBZ Evaluation Board - Front View AD-SYNCHRONA14-EBZ Evaluation Board Evaluation Board - Back View AD-SYNCHRONA14-EBZ Evaluation Board

Reference Designs

Portable Radio Reference Design Block Diagram
Portable Radio Reference Design Block Diagram
Final Enclosure of the ADRV-PACKRF
CN0412 Circuits from the lab

ADRV-PACKRF Robust Portable Radio Design

View Detailed Reference Design

Features and Benefits

  • Two Complete Radios
    • 2-Tx, 2-Rx, 2-Observation
  • Multiple Power Options
    • Wall Connected, Power over Ethernet, Battery
  • Built in IMU and GPS for tracking
  • Fully configurable and customizable software
CN0412
ADRV-PACKRF Robust Portable Radio Design
Portable Radio Reference Design Block Diagram
Final Enclosure of the ADRV-PACKRF

Latest Discussions

1 Years Ago
LTC2955-1 turns off immediately, TMR not working.
1 Years Ago
LTC2955-1 controlling MAXM17225 via EN
1 Years Ago
ON pin behaves strange
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