Analog Devices Inc. LTC2913CMS-1#TRPBF

Overview

LTC2913CMS-1#TRPBF from Analog Devices (formerly Linear Technology) is a dual-input, latching overvoltage/undervoltage supervisor IC designed for simultaneous monitoring of two independent power rails in embedded systems. It features ±1.5% threshold accuracy, 44μA quiescent current, open-drain UV/OV outputs, and guaranteed operation down to VCC = 1V. Used in desktop/notebook computers and network servers to ensure reliable power-up sequencing and fault detection.

For engineers reviewing the LTC2913CMS-1#TRPBF datasheet, LTC2913CMS-1#TRPBF pinout, LTC2913CMS-1#TRPBF application, or LTC2913CMS-1#TRPBF equivalent, key selection considerations include its latching OV output (LTC2913-1 variant), adjustable reset timeout via external capacitor, glitch-immune comparator architecture, and compatibility with 10-lead MSOP packaging for space-constrained PCB layouts.

Technical Context

The LTC2913CMS-1#TRPBF implements dual independent voltage monitoring channels-each with separate VHn (undervoltage sense) and VLn (overvoltage sense) inputs-feeding into precision comparators with integrated low-pass filtering for transient immunity. Its internal shunt regulator enables direct connection to supplies up to 6V or higher with series current-limiting resistor.

It uses a shared UV output and latching OV output (enabled by LATCH pin control), with timing governed by an external capacitor on the TMR pin (9ms/nF scaling). Thresholds are fixed at 500mV ±1.5%, requiring external resistor dividers to scale monitored voltages such as 3.3V or 5V rails.

Key Specifications

Pinout & Package

Package: 10-lead MSOP (3mm × 3mm), RoHS-compliant, lead-free (#TRPBF).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual UV/OV monitoring applications.

Compared with LTC2914CMS#TRPBF and LTC2904CMS8#TRPBF, the LTC2913CMS-1#TRPBF uniquely balances dual-rail supervision, latching OV response, and compact 10-lead MSOP footprint-making it optimal for cost-sensitive, space-limited commercial computing applications where fault persistence matters.

Availability

LTC2913CMS-1#TRPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and embedded industrial controllers requiring stable component supply with guaranteed C-grade temperature performance and long-term lifecycle support.

Supply support for LTC2913CMS-1#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 acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for legacy Linear products including the LTC2913 family.

The LTC2913 product line was designed specifically for high-accuracy, low-power dual-rail voltage supervision in commercial computing and communications infrastructure-emphasizing threshold stability, glitch immunity, and minimal PCB footprint.

FAQ

What is the function of the LATCH pin on the LTC2913CMS-1#TRPBF?

The LATCH pin on the LTC2913CMS-1#TRPBF controls the latching behavior of the OV output. When pulled low, the OV output latches low upon overvoltage detection and remains asserted until the LATCH pin is pulled high to clear it. When held high, the OV output behaves like the UV output-non-latching with programmable timeout. This pin is specific to the LTC2913-1 variant and is not present in the -2 version.

How do I configure the LTC2913CMS-1#TRPBF to monitor a 3.3V supply?

To monitor a 3.3V supply with the LTC2913CMS-1#TRPBF, use a three-resistor divider network per rail: connect VHn to the high-side tap and VLn to the low-side tap so that 3.3V maps to exactly 500mV at both inputs. For example, with RA = 4.53kΩ, RB = 1kΩ, and RC = 44.2kΩ, the divider yields 500mV at VHn (UV trip) and VLn (OV trip) for nominal 3.3V. The LTC2913CMS-1#TRPBF's ±1.5% threshold accuracy ensures trip points remain within 4.5% total tolerance.

Does the LTC2913CMS-1#TRPBF support operation below 2.3V VCC?

Yes-the LTC2913CMS-1#TRPBF guarantees UV and OV output functionality down to VCC = 1V. Below 2.1V, the device enters undervoltage lockout (UVLO), asserting UV low and blocking OV assertion. Once VCC rises above 2.1V, normal monitoring resumes with full comparator operation. This capability allows the LTC2913CMS-1#TRPBF to supervise brownout conditions and provide early warning before complete power loss.

What is the maximum capacitor value usable on the TMR pin of the LTC2913CMS-1#TRPBF?

The TMR pin of the LTC2913CMS-1#TRPBF supports capacitors from 10pF up to ≥10μF, limited only by leakage current: capacitor leakage must not exceed 1.3μA to ensure reliable timeout timing. For example, a 10μF X7R ceramic capacitor with ≤100nA leakage enables multi-second timeouts. Larger values require low-leakage film or polymer types; electrolytics are unsuitable due to high leakage. The LTC2913CMS-1#TRPBF datasheet confirms linear 9ms/nF scaling across this range.

Can the LTC2913CMS-1#TRPBF monitor negative voltages?

No-the LTC2913CMS-1#TRPBF is designed exclusively for positive voltage monitoring. Its VHn and VLn inputs operate from –0.3V to +7.5V, but internal comparators reference 500mV above GND; negative input voltages cannot produce valid UV/OV assertions. For negative rail supervision, Analog Devices recommends the LTC2909 or LTC2914, which include dedicated negative-input circuitry. The LTC2913CMS-1#TRPBF specification sheet explicitly limits use to positive-supply applications.