Analog Devices Inc. LTC2913IMS-1#TRPBF

Overview

LTC2913IMS-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. It features ±1.5% threshold accuracy, 44μA quiescent current, open-drain UV/OV outputs, and guaranteed operation down to VCC = 1V. It is used in desktop/notebook computers and network servers for core/I/O voltage supervision.

For engineers reviewing the LTC2913IMS-1#TRPBF datasheet, LTC2913IMS-1#TRPBF pinout, LTC2913IMS-1#TRPBF application, or LTC2913IMS-1#TRPBF equivalent, key selection criteria include latching OV behavior, adjustable reset timeout via external capacitor, glitch-immune dual UV/OV detection, and compatibility with 10-lead MSOP packaging for space-constrained embedded power management.

Technical Context

The LTC2913IMS-1#TRPBF implements two independent comparator pairs per monitored rail - one for undervoltage (VHn input) and one for overvoltage (VLn input) - sharing common UV and OV logic outputs. Its internal shunt regulator enables operation from supplies up to 6V directly or higher voltages with external current limiting.

It uses analog low-pass filtering at each comparator output to reject transients without adding hysteresis-induced threshold error. The LATCH pin (Pin 8) enables OV latching on fault detection and clearing when pulled high, distinguishing it from the non-latching LTC2913-2 variant.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2913IMS-2#TRPBF, the LTC2913IMS-1#TRPBF provides persistent fault signaling via OV latch, critical for safety-critical or remote systems; compared with LTC2904CMS8#TRPBF, it trades programmability for guaranteed ±1.5% accuracy and robust latching - making it superior for deterministic power-fail recovery.

Availability

LTC2913IMS-1#TRPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and industrial embedded controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LTC2913IMS-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 its high-performance analog/mixed-signal product lines with emphasis on reliability and precision.

The LTC2913 family was designed specifically for space-constrained, low-power dual-rail voltage supervision in computing and communications infrastructure, prioritizing accuracy, glitch immunity, and flexible reset timing.

FAQ

What is the key functional difference between LTC2913IMS-1#TRPBF and LTC2913IMS-2#TRPBF?

The LTC2913IMS-1#TRPBF features a latching overvoltage output controlled by the LATCH pin: when pulled low, OV stays asserted until manually cleared. The LTC2913IMS-2#TRPBF replaces this with a DIS pin that disables both UV and OV outputs when pulled high. This makes LTC2913IMS-1#TRPBF ideal for persistent fault indication, while LTC2913IMS-2#TRPBF suits applications needing temporary output suppression. Both share identical pinout, threshold accuracy, and quiescent current.

How does the LTC2913IMS-1#TRPBF achieve ±1.5% threshold accuracy across temperature?

The LTC2913IMS-1#TRPBF achieves ±1.5% threshold accuracy through laser-trimmed internal reference circuitry and matched comparator input stages, validated over –40°C to +85°C. This specification applies to the 0.5V internal comparator threshold (VUOT), meaning a 5V rail monitored via resistive divider will trigger UV between 4.433V and 4.567V. External resistor tolerances also contribute to overall system accuracy, so 1% or better resistors are recommended for tight trip-point control in the LTC2913IMS-1#TRPBF design.

Can LTC2913IMS-1#TRPBF monitor negative voltages?

No, the LTC2913IMS-1#TRPBF is designed exclusively for positive voltage monitoring. Its VHn and VLn inputs operate with respect to GND and require input voltages between –0.3V and +7.5V. To supervise negative rails, a level-shifting circuit (e.g., op-amp inverter or dedicated negative-supply monitor like LTC2909) is required. The LTC2913IMS-1#TRPBF datasheet explicitly states "Positive UV/OV Monitoring Configuration" and shows only positive-resistor-divider examples - confirming its native positive-rail-only capability.

What is the minimum capacitor value required on the TMR pin of LTC2913IMS-1#TRPBF?

The minimum capacitor value required on the TMR pin of LTC2913IMS-1#TRPBF is 10pF, as specified in the Absolute Maximum Ratings and Applications Information sections. Using less than 10pF risks unreliable timeout timing due to parasitic capacitance dominance. A 1nF capacitor yields a typical timeout of 8.5ms, scaling linearly at ~9ms/nF. For bypassing the timer entirely, TMR must be tied directly to VCC - floating the pin is not permitted and may cause undefined behavior in the LTC2913IMS-1#TRPBF.

Does LTC2913IMS-1#TRPBF require external pull-up resistors on UV and OV pins?

The LTC2913IMS-1#TRPBF includes weak internal pull-ups to VCC on both UV and OV pins, eliminating the need for external pull-ups in most cases. However, at VCC = 1V, the internal pull-up strength is minimal; an external pull-up ≤100kΩ is recommended on OV if reliable high-state assertion is critical during low-VCC conditions. For wired-OR configurations or faster rise times, external pull-ups are beneficial but must be sized to ensure the combined pull-up strength does not exceed the internal pull-down's sink capability (2.5mA max). The LTC2913IMS-1#TRPBF's open-drain architecture inherently supports this flexibility.