Analog Devices Inc. LTC2962IUD#TRPBF

Overview

LTC2962IUD#TRPBF from Analog Devices is a quad configurable power supply supervisor IC with ±0.5% threshold accuracy over temperature, 16 selectable voltage thresholds per channel (including 5V/3.3V/2.5V/1.8V/1.5V/1.2V/1.0V and ±ADJ modes), adjustable reset timeout via external capacitor, and push-pull or open-drain RST output. It supervises up to four independent supply rails in high-reliability telecom and industrial systems.

For engineers reviewing the LTC2962IUD#TRPBF datasheet, LTC2962IUD#TRPBF pinout, LTC2962IUD#TRPBF application, or LTC2962IUD#TRPBF equivalent, key selection considerations include guaranteed RST operation down to VCC = 1V, ±0.5% threshold accuracy across –40°C to +85°C, support for negative voltage monitoring via –ADJ mode, and compatibility with 1% external resistors for threshold programming.

Technical Context

The LTC2962IUD#TRPBF implements a 4-channel analog comparator architecture with internal 1.195V buffered reference and 4-bit ADC-based threshold selection per channel. Each Vn input is compared against one of 16 factory-trimmed thresholds selected by PG1–PG4 voltage ratios relative to REF, enabling precise undervoltage, overvoltage, or negative-supply monitoring without trimming.

Reset timing is controlled either by an external capacitor on RT (12ms/nF) or internal 200ms timer when RT tied to VCC. RST output behavior is configurable via DVCC: grounded for open-drain (6µA pull-up to VCC), or ≥1.6V for active push-pull to DVCC. RDIS enables reset disable for supply margining without system reset.

Key Specifications

Pinout & Package

16-lead 3mm × 3mm plastic QFN (UD package) with exposed pad (pin 17, optional GND connection).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad power supply supervisor applications.

Compared with TPS3431QPWRQ1 and MAX6816EUT+T, the LTC2962IUD#TRPBF delivers superior accuracy (±0.5% vs ±1.5–2%), full quad integration, and flexible threshold configuration - reducing design risk in high-reliability systems where supply margin is constrained.

Availability

LTC2962IUD#TRPBF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and automotive ADAS applications requiring stable component supply, extended temperature operation (–40°C to +85°C), and high-accuracy power monitoring.

Supply support for LTC2962IUD#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and consumer markets.

The LTC2962 series belongs to Analog Devices' precision power monitoring product line, designed specifically for high-reliability systems demanding ±0.5% threshold accuracy, quad-rail supervision, and robust operation across extended temperature ranges.

FAQ

What is the operating temperature range for the LTC2962IUD#TRPBF?

The LTC2962IUD#TRPBF is rated for operation from –40°C to +85°C (I-grade). This extended industrial temperature range ensures reliable performance in harsh environments such as telecom base stations, industrial PLCs, and automotive ADAS controllers where ambient temperatures exceed commercial limits.

How does the LTC2962IUD#TRPBF achieve ±0.5% threshold accuracy?

The LTC2962IUD#TRPBF achieves ±0.5% threshold accuracy through factory-trimmed internal voltage references and comparator offsets, combined with a 4-bit ADC that digitizes PG1–PG4 input voltages to select one of 16 calibrated thresholds per channel. This architecture maintains accuracy over temperature without requiring external calibration components.

Can the LTC2962IUD#TRPBF monitor negative supply voltages?

Yes, the LTC2962IUD#TRPBF supports negative voltage monitoring via its –ADJ mode, which compares V1–V4 inputs to a 0.5V internal reference. When used with an external resistive divider, –ADJ mode enables undervoltage detection on negative rails (e.g., –5V, –12V) without additional level-shifting circuitry.

What is the function of the RDIS pin on the LTC2962IUD#TRPBF?

The RDIS (Reset Disable) pin on the LTC2962IUD#TRPBF forces the RST output high when pulled low, disabling automatic reset assertion. This allows safe in-system voltage margining tests - for example, lowering a 1.2V core supply to verify processor stability - without triggering unintended system resets.

Does the LTC2962IUD#TRPBF support both push-pull and open-drain RST output configurations?

Yes, the LTC2962IUD#TRPBF supports both configurations via the DVCC pin: grounding DVCC configures RST as an open-drain output (6µA internal pull-up to VCC), while applying ≥1.6V to DVCC enables active push-pull operation to DVCC - providing flexibility for interfacing with diverse microcontroller reset inputs.