Analog Devices Inc. LTC2913CMS-1#PBF

Overview

LTC2913CMS-1#PBF from Analog Devices (formerly Linear Technology) is a dual-input, latching overvoltage/undervoltage supervisor IC designed for simultaneous monitoring of two independent power rails. 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 for core/I/O voltage supervision.

For engineers reviewing the LTC2913CMS-1#PBF datasheet, LTC2913CMS-1#PBF pinout, LTC2913CMS-1#PBF application, or LTC2913CMS-1#PBF equivalent, key selection considerations include its latching OV output (LTC2913-1 variant), adjustable reset timeout via external capacitor, glitch-filtered comparator inputs, dual UV/OV trip point adjustability, and MSOP-10 package compatibility with space-constrained embedded power management systems.

Technical Context

The LTC2913CMS-1#PBF implements two independent voltage monitor channels-each with VHn (undervoltage sense) and VLn (overvoltage sense) inputs-feeding into precision comparators with integrated low-pass filtering for transient immunity. Thresholds are referenced to a stable 500mV internal reference (±1.5% over temperature).

Its latching OV behavior (enabled by LATCH pin control) distinguishes it from the -2 variant; when LATCH is pulled low, OV asserts and remains latched until cleared by pulling LATCH high. UV output operates with programmable timeout (via TMR pin capacitor) and shares common assertion logic across both monitored rails.

Key Specifications

Pinout & Package

Package: 10-Lead MSOP (3mm × 3mm), RoHS-compliant, exposed pad optional for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2914CMS#PBF, LTC2913CMS-1#PBF offers smaller footprint and lower pin count for dual-rail use cases, while retaining latching OV essential for fault persistence. Against LTC2904CMS8#PBF, it delivers superior noise immunity and deterministic fault signaling - critical in high-noise server and industrial environments.

Availability

LTC2913CMS-1#PBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and industrial embedded controllers requiring stable component supply with long-term lifecycle assurance.

Supply support for LTC2913CMS-1#PBF 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 its high-reliability analog/mixed-signal product lines. Linear's legacy supervisors emphasize precision, low power, and robustness in power management ICs.

The LTC2913CMS-1#PBF belongs to Linear's voltage supervisor family, engineered specifically for multi-rail power integrity validation in computing and communications infrastructure where deterministic fault response and minimal quiescent current are mandatory.

FAQ

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

The LATCH pin on the LTC2913CMS-1#PBF controls the overvoltage output behavior: when pulled low, it enables latching - causing OV to remain asserted low after an overvoltage event until LATCH is raised high to clear the latch. This differs from the LTC2913-2 variant, which uses DIS for output disable. The LTC2913CMS-1#PBF requires explicit latch clearing to resume normal timeout-based OV operation.

Can the LTC2913CMS-1#PBF monitor negative voltages?

No, the LTC2913CMS-1#PBF is designed exclusively for positive voltage monitoring. Its VHn and VLn inputs operate with a 500mV internal reference and require input voltages within –0.3V to 7.5V relative to GND. For negative rail supervision, Analog Devices recommends the LTC2909 or LTC2914, which support dedicated negative input configurations. The LTC2913CMS-1#PBF does not interpret or respond to negative potentials on any pin.

How is the reset timeout period set on the LTC2913CMS-1#PBF?

The reset timeout period on the LTC2913CMS-1#PBF is set by connecting an external capacitor (CTMR) between the TMR pin and GND. The timeout follows tUOTO ≈ 9ms/nF - e.g., a 22nF capacitor yields ~200ms. Tying TMR to VCC bypasses the timer entirely. The LTC2913CMS-1#PBF datasheet specifies CTMR ≥ 10pF minimum; leakage must stay below 1.3μA to maintain accuracy. Capacitor value directly determines fault-hold duration before UV/OV release.

What is the minimum VCC voltage required for valid operation of the LTC2913CMS-1#PBF?

The LTC2913CMS-1#PBF guarantees functional operation down to VCC = 1V: UV output asserts low and OV is blocked during undervoltage lockout (UVLO) below 2.0V, and both outputs remain valid with VOL ≤ 0.15V at VCC = 1V. This enables reliable brown-out detection and controlled shutdown in systems with wide-input DC-DC converters. Operation below 1V is not characterized or supported.

Does the LTC2913CMS-1#PBF support wired-OR connection of multiple supervisors?

Yes, the LTC2913CMS-1#PBF supports wired-OR configurations via its open-drain UV and OV outputs. Each output includes a weak internal pull-up to VCC but strong active-low pull-down, allowing multiple LTC2913CMS-1#PBF devices (or other open-drain supervisors) to share a common reset bus. External pull-up strength must be selected to ensure total pull-up current does not exceed individual device sink capability (2.5mA max at VCC = 2.3V).