Analog Devices Inc. LTC2952IUF#TRPBF

Overview

LTC2952IUF#TRPBF from Analog Devices (formerly Linear Technology) is a pushbutton power management IC integrating dual ideal diode PowerPath™ controllers, system supervision, and microprocessor handshake logic. It delivers 20mV forward regulation across external P-channel MOSFETs, supports 2.7V–28V input range, features ±1.5% voltage threshold accuracy over temperature, and enables graceful shutdown via interrupt-driven μP housekeeping - used in battery-backed portable instrumentation and adapter/battery switchover systems.

For engineers reviewing the LTC2952IUF#TRPBF datasheet, LTC2952IUF#TRPBF pinout, LTC2952IUF#TRPBF application, or LTC2952IUF#TRPBF equivalent, key selection criteria include its dual-source automatic switchover capability, adjustable ON/OFF debounce timing, integrated watchdog with 1.6s timeout, low 25μA shutdown current, and QFN-20 package compatibility with thermal performance (θJA = 37°C/W).

Technical Context

The LTC2952IUF#TRPBF implements two independent ideal diode controllers regulating external P-MOSFETs to maintain ≤20mV forward drop between V1/V2 and VS, with fast reverse turn-off at –35mV. Its pushbutton interface uses separate ONT/OFFT pins for configurable debounce (26ms default + up to 20ms adjustable), while KILL, M1, and M2 pins configure PowerPath behavior via accurate 0.5V comparators with 15mV hysteresis.

System supervision includes VM-based reset with 200ms delay, PFI-triggered PFO assertion, and WDE edge-sensitive watchdog with extendable 400ms wait windows during shutdown. All monitoring thresholds are guaranteed ±1.5% over –40°C to +85°C, and EN operates as high-voltage open-drain output compatible with DC/DC enable inputs.

Key Specifications

Pinout & Package

Package: 20-lead 4mm × 4mm plastic QFN (UF package) with optional exposed pad (Pin 21) connected to GND for thermal enhancement (θJA = 37°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power-path supervision applications.

Compared with LTC2954IUF#TRPBF, the LTC2952IUF#TRPBF offers identical PowerPath and supervision functionality at lower cost and maturity, while TPS2113APWR lacks critical system-level features like pushbutton control and watchdog - making it unsuitable as a drop-in replacement.

Availability

LTC2952IUF#TRPBF is available at Aetrix Electronics and suitable for battery-backed portable instrumentation, adapter/battery switchover systems, and industrial edge controllers requiring stable component supply across extended temperature ranges.

Supply support for LTC2952IUF#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. (ADI) acquired Linear Technology in 2017 and maintains its precision analog and power management portfolio with rigorous automotive and industrial qualification standards.

The LTC2952 product line was designed for intelligent power-path arbitration in portable and battery-conscious systems - combining pushbutton control, dual ideal diode switching, and integrated supervision in a single compact IC.

FAQ

What is the operating temperature range for the LTC2952IUF#TRPBF?

The LTC2952IUF#TRPBF is rated for –40°C to +85°C ambient operation, matching the "I" grade specification. This range is validated across all electrical parameters including comparator thresholds (±1.5% accuracy), reset timing (200ms), and watchdog timeout (1.6s), ensuring reliability in industrial and extended-environment applications.

How does the LTC2952IUF#TRPBF manage dual power sources without manual intervention?

The LTC2952IUF#TRPBF automatically selects the higher-voltage source between V1 and V2 using dual ideal diode controllers that regulate external P-MOSFETs to maintain ≤20mV forward drop. When V2 exceeds V1 by >3.3V (V2PREF_TH), it becomes the preferential source - enabling seamless, lossless switchover without software or external logic.

Can the LTC2952IUF#TRPBF support graceful shutdown with microprocessor coordination?

Yes. The LTC2952IUF#TRPBF asserts the open-drain INT pin 26ms after a valid PB off event, signaling the μP to begin housekeeping. The WDE pin allows extending this window in 400ms increments via edge detection - giving firmware full control over shutdown sequencing before EN is pulled low.

What is the purpose of the ONT and OFFT pins on the LTC2952IUF#TRPBF?

The ONT and OFFT pins accept external capacitors to independently adjust pushbutton debounce timing beyond the internal 26ms baseline - adding up to 20ms per pin. This prevents false triggering from mechanical switch bounce while allowing fine-tuned response for different user-interface designs.

Does the LTC2952IUF#TRPBF require external components for basic operation?

Yes. Minimal external components include: 0.1μF bypass capacitor on VS, optional timing capacitors on ONT/OFFT, pull-up resistor on EN (if driven device lacks internal pull-up), and external P-channel MOSFETs for ideal diode paths. No external resistors are needed for comparator inputs due to internal 3–10μA pull-ups.