Analog Devices Inc. LTC2950CTS8-2#TRPBF

Overview

LTC2950CTS8-2#TRPBF from Analog Devices (formerly Linear Technology) is a micropower pushbutton ON/OFF controller with low-true enable output, operating from 2.7V to 26.4V supply, consuming only 6µA quiescent current, featuring independently programmable 32ms default ON/OFF debounce and internal 512ms KILL blanking timer - used in portable instrumentation meters and blade servers for controlled power sequencing.

For engineers reviewing the LTC2950CTS8-2#TRPBF datasheet, LTC2950CTS8-2#TRPBF pinout, LTC2950CTS8-2#TRPBF application, or LTC2950CTS8-2#TRPBF equivalent, key selection criteria include its TSOT-23-8 package, EN low-true open-drain output, KILL input threshold of 0.6V ±30mV, and compatibility with battery-powered systems requiring robust PB interface and µP handshake capability.

Technical Context

The LTC2950CTS8-2#TRPBF implements a dual-stage timing architecture: internal 32ms debounce timers on PB input plus externally adjustable ONT/OFFT capacitive extensions, and fixed 512ms KILL turn-on blanking and 1024ms KILL turn-off delay. Its PB input supports –6V to 33V with ±10kV HBM ESD rating and internal 100kΩ pull-up.

It features an open-drain INT output for µP interrupt signaling during power-down initiation and a low-true EN output (LTC2950-2 variant) that releases high upon valid PB press, KILL assertion, or timeout - enabling circuit breaker control in industrial power-path applications.

Key Specifications

Pinout & Package

Package: 8-Lead Plastic TSOT-23 (3mm × 2mm), exposed pad optional for thermal relief; RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar pushbutton power control applications.

Compared with LTC2950CTS8-1#TRPBF, the LTC2950CTS8-2#TRPBF eliminates external level-shifting for PFET control; versus LTC2953CTS8-2#TRPBF, it offers lower cost and simpler timing for applications not needing voltage-monitoring reset functionality.

Availability

LTC2950CTS8-2#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation meters, blade servers, and desktop computers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LTC2950CTS8-2#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LTC2950 product line delivers micropower pushbutton ON/OFF controllers optimized for battery-powered and industrial systems requiring reliable, low-current power sequencing with µP coordination.

FAQ

What is the EN output behavior of the LTC2950CTS8-2#TRPBF?

The LTC2950CTS8-2#TRPBF features a low-true open-drain EN output. It asserts low after a valid pushbutton press (≥32ms debounced), remains low during normal operation, and releases high upon KILL assertion, second PB press, or timeout. This enables direct control of high-side PFET gates in PowerPath™ configurations without external level shifters.

How does the KILL input function in the LTC2950CTS8-2#TRPBF?

In the LTC2950CTS8-2#TRPBF, the KILL input has a precise 0.6V threshold comparator. During power-on, it is blanked for 512ms to allow system initialization; if not pulled high within that window, EN releases. During operation, pulling KILL low immediately releases EN, enabling controlled shutdown or undervoltage response.

Can the LTC2950CTS8-2#TRPBF operate from a 3.3V supply?

Yes, the LTC2950CTS8-2#TRPBF operates over 2.7V to 26.4V, fully supporting 3.3V systems. At 3.3V, its 6µA quiescent current and 0.6V KILL threshold remain valid, and all timing parameters (e.g., 32ms debounce) are maintained - making it ideal for low-voltage embedded designs.

What is the purpose of the ONT and OFFT pins on the LTC2950CTS8-2#TRPBF?

The ONT and OFFT pins on the LTC2950CTS8-2#TRPBF allow external capacitors to extend the default 32ms turn-on and turn-off debounce times. Placing a capacitor from ONT/OFFT to GND adds programmable delay (e.g., 1500pF adds ~11.5ms), preventing false triggers in electrically noisy environments or with long PCB traces.

Is the LTC2950CTS8-2#TRPBF compatible with TSOT-23-8 footprint layouts?

Yes, the LTC2950CTS8-2#TRPBF uses the standard 8-lead Plastic TSOT-23 package (3mm × 2mm), matching JEDEC MO-193. Its pinout - VIN, PB, ONT, GND, INT, EN, OFFT, KILL - is identical across all TSOT-23 variants in the LTC2950 family, ensuring drop-in compatibility with existing layouts.