Analog Devices Inc. LTC2913IDD-1#PBF

Overview

LTC2913IDD-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 LTC2913IDD-1#PBF datasheet, LTC2913IDD-1#PBF pinout, LTC2913IDD-1#PBF application, or LTC2913IDD-1#PBF equivalent, key selection criteria include its dual UV/OV input architecture, latching OV output (LTC2913-1 variant), adjustable reset timeout via external capacitor, glitch-filtered comparators, and support for 10-lead DFN (3mm × 3mm) packaging with exposed pad.

Technical Context

The LTC2913IDD-1#PBF implements two independent comparator pairs per monitored rail - one for undervoltage (VHn < 0.5V) and one for overvoltage (VLn > 0.5V) detection - sharing common open-drain UV and OV outputs. Its internal shunt regulator enables operation up to 6V directly or higher voltages with external current limiting.

Glitch immunity is achieved via integrated low-pass filtering at each comparator output, eliminating need for external hysteresis while maintaining precise ±1.5% threshold accuracy across –40°C to 85°C. The LATCH pin (Pin 8) enables OV latching behavior unique to the -1 variant, distinguishing it functionally from the -2 version.

Key Specifications

Pinout & Package

Package: 10-lead (3mm × 3mm) plastic DFN with exposed thermal pad (Pin 11, optional GND connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2913CMS-1#PBF, the LTC2913IDD-1#PBF offers identical functionality in a smaller 3mm × 3mm DFN package with superior thermal performance (θJA = 43°C/W). Against LTC2914CDD-1#PBF, it provides lower cost and simpler configuration for strictly dual-rail use cases without needing quad-channel capability.

Availability

LTC2913IDD-1#PBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and embedded industrial controllers requiring stable component supply with guaranteed long-term availability.

Supply support for LTC2913IDD-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 precision analog and power management product lines with full technical and manufacturing continuity.

The LTC2913 series belongs to Linear's high-accuracy voltage supervisor family, engineered specifically for reliable multi-rail power sequencing and fault detection in computing and communications infrastructure.

FAQ

What is the operating temperature range for the LTC2913IDD-1#PBF?

The LTC2913IDD-1#PBF is rated for –40°C to +85°C (Industrial grade), verified across all electrical specifications including ±1.5% threshold accuracy, 44μA quiescent current, and glitch-immune comparator response. This range supports deployment in demanding embedded and computing environments where ambient temperatures exceed commercial limits.

How does the LATCH pin function on the LTC2913IDD-1#PBF?

On the LTC2913IDD-1#PBF, the LATCH pin (Pin 8) controls overvoltage latching behavior: pulling it low causes the OV output to latch low upon detection and remain asserted until LATCH is pulled high. When held high, the OV output behaves like UV - asserting low during OV events and releasing after the programmed timeout period elapses with all inputs valid.

Can the LTC2913IDD-1#PBF monitor voltages above 6V?

Yes - the LTC2913IDD-1#PBF incorporates an internal 6.6V shunt regulator on the VCC pin. To monitor supplies above 6V, connect a series current-limiting resistor between the supply and VCC to restrict input current to ≤10mA. The device then regulates its own supply while maintaining full functionality, including UV/OV monitoring and output assertion.

What is the purpose of the TMR pin on the LTC2913IDD-1#PBF?

The TMR pin (Pin 9) sets the reset timeout period for both UV and OV outputs. Connecting an external capacitor CTMR to GND yields a timeout of ~9ms/nF (e.g., 1nF → 8.5ms). Tying TMR to VCC disables the timeout entirely, causing UV/OV to assert/deassert immediately upon input threshold crossing - useful for applications requiring minimal latency.

Does the LTC2913IDD-1#PBF support wired-OR output configurations?

Yes - both UV and OV outputs on the LTC2913IDD-1#PBF are open-drain with weak internal pull-ups to VCC. This architecture enables direct wired-OR connection of multiple LTC2913IDD-1#PBF outputs (or other open-drain devices) to a shared system reset line, simplifying fault aggregation without external logic.