Analog Devices Inc. LTC2934IDC-2#TRPBF

Overview

LTC2934IDC-2#TRPBF from Analog Devices (acquired Linear Technology) is an ultra-low power, adjustable voltage supervisor IC with independent power-fail warning and active-pull-up reset output. It features 500nA typical quiescent current, ±1.5% threshold accuracy over temperature, 1.6V minimum supply operation, and selectable 15ms/200ms reset timeout - designed for battery-backed systems requiring early brownout detection and clean system initialization.

For engineers reviewing the LTC2934IDC-2#TRPBF datasheet, LTC2934IDC-2#TRPBF pinout, LTC2934IDC-2#TRPBF application, or LTC2934IDC-2#TRPBF equivalent, key selection criteria include its dual-threshold adjustability (ADJ/PFI), active-pull-up RST/PFO outputs, –40°C to 85°C industrial temperature grade, and 2mm × 2mm DFN package compatibility with space-constrained portable designs.

Technical Context

The LTC2934IDC-2#TRPBF integrates two precision comparators with independently configurable thresholds (ADJ for reset, PFI for power-fail), each referenced to a stable 400mV internal reference. Its reset logic includes 5% hysteresis on ADJ and 2.5% on PFI, plus an internal timer triggered upon threshold crossing.

It supports manual reset via MR input with internal 900kΩ pull-up, and reset timeout selection (15ms or 200ms) via RT pin tied to GND or VCC. The LTC2934IDC-2#TRPBF variant uses active-pull-up outputs (RST and PFO), eliminating external pull-up resistors and ensuring valid logic levels down to VCC = 0V when paired with a 100kΩ ground tie.

Key Specifications

Pinout & Package

Package: 8-lead, 2mm × 2mm plastic DFN (DC package) with optional exposed pad connected to GND. Compact footprint suits wearables, IoT sensors, and handheld medical devices.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with LTC2935IDC#TRPBF and LTC2909IDD#TRPBF, the LTC2934IDC-2#TRPBF uniquely balances ultra-low IQ, fully adjustable dual thresholds, and active-pull-up outputs in a 2mm × 2mm DFN - making it optimal for space- and energy-constrained single-supply applications where precision threshold placement is critical.

Availability

LTC2934IDC-2#TRPBF is available at Aetrix Electronics and suitable for portable medical sensors, wireless IoT endpoints, and point-of-sale terminals requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LTC2934IDC-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. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.

The LTC2934IDC-2#TRPBF belongs to ADI's precision power supervision product line, engineered for ultra-low-power battery-operated systems demanding accurate, configurable voltage monitoring with minimal design overhead.

FAQ

What is the function of the RT pin on the LTC2934IDC-2#TRPBF?

The RT pin on the LTC2934IDC-2#TRPBF selects the reset timeout duration: tying RT to GND configures a 15ms delay, while tying RT to VCC selects 200ms. This hardware-selectable feature ensures deterministic reset timing without firmware involvement. The LTC2934IDC-2#TRPBF does not require pull-up/down resistors on RT - direct connection suffices, and the internal circuitry interprets the logic level immediately after power-up.

How does the LTC2934IDC-2#TRPBF differ from the LTC2934IDC-1#TRPBF?

The LTC2934IDC-2#TRPBF features active-pull-up RST and PFO outputs that drive high to VCC, whereas the LTC2934IDC-1#TRPBF uses open-drain outputs requiring external pull-up resistors. This eliminates BOM items and simplifies layout. The LTC2934IDC-2#TRPBF also supports valid output states even when VCC drops to 0V - provided a 100kΩ resistor ties RST/PFO to GND to sink leakage currents.

Can the LTC2934IDC-2#TRPBF monitor two different supply voltages simultaneously?

Yes - the LTC2934IDC-2#TRPBF can supervise two independent rails using separate resistive dividers on ADJ (for reset) and PFI (for power-fail). For example, ADJ may monitor a 3.3V logic rail while PFI monitors a 5V analog supply. The LTC2934IDC-2#TRPBF's independent comparators and thresholds enable this dual-rail functionality without additional ICs, though both inputs share the same 400mV reference.

What is the minimum supply voltage required for the LTC2934IDC-2#TRPBF to operate correctly?

The LTC2934IDC-2#TRPBF operates down to 1.6V on VCC, maintaining full specification compliance including 500nA quiescent current and ±1.5% threshold accuracy across –40°C to 85°C. Below 1.6V, RST and PFO may assert low unpredictably; however, the LTC2934IDC-2#TRPBF remains functional as a supervisor down to ~1.0V, albeit outside guaranteed specs - useful for detecting final battery depletion.

Is the exposed pad on the LTC2934IDC-2#TRPBF's DFN package required to connect to ground?

No - the exposed pad (Pin 9) on the LTC2934IDC-2#TRPBF's 2mm × 2mm DFN package is optional for grounding. When connected to PCB GND, it improves thermal dissipation and reduces θJA from 102°C/W to ~70°C/W. When left floating, the LTC2934IDC-2#TRPBF meets all electrical specifications; however, thermal performance degrades under sustained load, which is rarely relevant given its 500nA operating current.