Analog Devices Inc. LTC2912CDDB-1#TRPBF

Overview

LTC2912CDDB-1#TRPBF from Analog Devices is a single-channel UV/OV voltage monitor IC in an 8-lead (3mm × 2mm) DFN package, operating from 2.3V to 6V supply with internal 6.6V shunt regulator for higher-voltage operation (e.g., 12V/24V/48V), ±1.5% threshold accuracy, 29µA quiescent current, and open-drain OV/UV outputs - used for reliable power-good supervision in desktop computers and network servers.

For engineers reviewing the LTC2912CDDB-1#TRPBF datasheet, LTC2912CDDB-1#TRPBF pinout, LTC2912CDDB-1#TRPBF application, or LTC2912CDDB-1#TRPBF equivalent, key selection criteria include adjustable UV/OV trip points via external resistor dividers, glitch-immune input filtering, programmable reset timeout via TMR capacitor, latch control on OV output (LTC2912-1 variant), and guaranteed operation down to VCC = 1V.

Technical Context

The LTC2912CDDB-1#TRPBF implements dual comparator-based monitoring: VH input triggers undervoltage when below 0.5V reference; VL input triggers overvoltage when above 0.5V reference. Each path includes low-pass filtering to reject sub-500µs glitches, ensuring noise immunity without added hysteresis error.

Its internal architecture features independent OV and UV pulse generators, a programmable timer (TMR pin) setting timeout period (6–14ms for 1nF), and a latch-clear function (LATCH pin) that resets the OV output when pulled high - distinguishing the -1 variant from -2 (DIS-enabled) and -3 (noninverting OV).

Key Specifications

Pinout & Package

Package: 8-lead (3mm × 2mm) plastic DFN (DDB) with exposed pad (Pin 9) soldered to PCB ground. Thermal resistance θJA = 55°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage monitor applications.

Compared with LTC2912CDDB-1#TRPBF, LTC2912IDDB-1#TRPBF offers identical electrical behavior with extended temperature rating, while LTC2913CDD-1#TRPBF trades single-rail latch control for dual-rail capability - making the former ideal for thermal upgrades and the latter for BOM consolidation in multi-supply systems.

Availability

LTC2912CDDB-1#TRPBF is available at Aetrix Electronics and suitable for desktop computer power sequencing, network server core voltage monitoring, and industrial PLC I/O module supply guard requiring stable component supply and long-term lifecycle support.

Supply support for LTC2912CDDB-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, computing, and automotive markets.

The LTC2912 product line delivers precision, low-power voltage supervision ICs optimized for space-constrained, reliability-critical applications such as computing infrastructure and telecom equipment where accurate UV/OV detection and glitch immunity are mandatory.

FAQ

What is the operating temperature range of the LTC2912CDDB-1#TRPBF?

The LTC2912CDDB-1#TRPBF is specified for 0°C to 70°C operation (C-grade), confirmed by its order code "LCJZ" and packaging data sheet section. This makes it suitable for commercial-grade computing and networking applications where ambient temperatures remain within this envelope. The device maintains ±1.5% threshold accuracy across this full range.

How does the LATCH pin function on the LTC2912CDDB-1#TRPBF?

The LATCH pin (Pin 1) on the LTC2912CDDB-1#TRPBF controls the OV output latch behavior: when pulled low, OV latches low upon overvoltage detection and remains asserted until LATCH is pulled high to clear it. When held high, OV behaves like UV - asserting for a programmable timeout after fault clearance. This dual-mode operation is intrinsic to the LTC2912-1 variant embodied in LTC2912CDDB-1#TRPBF.

Can the LTC2912CDDB-1#TRPBF monitor a 48V supply directly?

Yes - the LTC2912CDDB-1#TRPBF can monitor 48V supplies using its internal 6.6V shunt regulator. A series current-limiting resistor must be placed between the 48V source and the VCC pin to restrict input current to ≤10mA. For example, a 3.8kΩ resistor yields ~10mA at 48V, keeping VCC regulated at ~6.6V while dissipating ~410mW in the resistor.

What is the minimum capacitor value required on the TMR pin of the LTC2912CDDB-1#TRPBF?

The TMR pin of the LTC2912CDDB-1#TRPBF requires a minimum 10pF capacitor to ground to ensure stable timeout operation. Values below 10pF may cause erratic reset timing or failure to assert OV/UV. Typical designs use 1nF (8.5ms timeout) to 22nF (200ms timeout), scaling linearly at ~9ms/nF per the datasheet's Reset Timeout vs Capacitance curve.

Does the LTC2912CDDB-1#TRPBF support adjustable undervoltage and overvoltage thresholds?

Yes - the LTC2912CDDB-1#TRPBF supports fully adjustable UV and OV thresholds via an external 3-resistor divider network connected to VH and VL inputs. The internal 0.5V reference enables precise trip points (e.g., 3.3V ±10% = 2.97V UV / 3.63V OV) with design equations provided in the datasheet's Applications Information section.