Analog Devices Inc. LTC2915CDDB-1#TRPBF

Overview

LTC2915CDDB-1#TRPBF from Analog Devices (formerly Linear Technology) is a precision voltage supervisor IC with 9 selectable nominal thresholds (12V to 1.0V + ADJ), –5%/–10%/–15% tolerance selection via TOL pin, ±1.5% threshold accuracy over –40°C to 125°C, and 30μA quiescent current. It monitors system supply rails in automotive control units and industrial embedded systems where reliable power-up/power-down reset assertion is critical.

For engineers reviewing the LTC2915CDDB-1#TRPBF datasheet, LTC2915CDDB-1#TRPBF pinout, LTC2915CDDB-1#TRPBF application, or LTC2915CDDB-1#TRPBF equivalent, key selection criteria include its 8-pin DFN (3mm × 2mm) package, internal 200ms reset timeout option, glitch-immune comparator architecture, and guaranteed RST assertion down to VCC = 0.8V.

Technical Context

The LTC2915CDDB-1#TRPBF implements a precision bandgap-referenced comparator with three-state SEL1/SEL2/TOL inputs decoding nine fixed thresholds and three tolerance bands. Its VM input accepts direct monitoring of supplies from 0.5V (ADJ mode) to 12V, with internal shunt regulation enabling operation up to 6.2V on VCC.

Reset timing is configurable via RT pin: tied to VCC for 200ms internal timeout, floating for ~400μs, or capacitor-coupled to GND for adjustable delay (9ms/nF). The open-drain RST output drives low when VM falls below the programmed threshold and remains asserted for the full timeout after recovery.

Key Specifications

Pinout & Package

Package: 8-lead (3mm × 2mm) plastic DFN with exposed pad (Pin 9), 0.65mm pitch, 1.0mm max height. RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2916CDDB-1#TRPBF, the LTC2915CDDB-1#TRPBF provides tolerance selection at the expense of manual reset; versus LTC2903CMS8-3.3#TRPBF, it trades absolute accuracy for broad threshold coverage and field-programmable tolerance-critical for multi-rail validation and margin testing.

Availability

LTC2915CDDB-1#TRPBF is available at Aetrix Electronics and suitable for automotive control systems, industrial PLCs, medical sensor modules, and telecom base station power management requiring stable component supply across extended temperature ranges.

Supply support for LTC2915CDDB-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 precision analog portfolio, including high-reliability supervisors, references, and signal conditioning ICs for demanding industrial and automotive applications.

The LTC2915 series was designed specifically for robust, resistorless voltage monitoring in space-constrained, thermally aggressive environments-emphasizing guaranteed accuracy, low IQ, and glitch immunity over wide temperature ranges.

FAQ

What is the maximum supply voltage the LTC2915CDDB-1#TRPBF can tolerate on its VCC pin?

The LTC2915CDDB-1#TRPBF features an internal 6.2V shunt regulator on the VCC pin. When operated from supplies exceeding 5.7V, a series current-limiting resistor must be used to keep VCC pin current ≤5mA. Without that resistor, the absolute maximum VCC voltage is 5.7V; with proper resistor sizing, the device supports input voltages up to 60V as demonstrated in automotive battery applications.

Does the LTC2915CDDB-1#TRPBF support manual reset functionality?

No, the LTC2915CDDB-1#TRPBF does not include a manual reset (MR) input. That function is exclusive to the LTC2916 variant. The LTC2915CDDB-1#TRPBF uses the Pin 2 terminal as the TOL (tolerance select) input instead. For manual reset capability, engineers should select the pin-compatible LTC2916CDDB-1#TRPBF, which substitutes MR for TOL while retaining identical threshold programming and package.

How is the reset timeout period configured on the LTC2915CDDB-1#TRPBF?

The LTC2915CDDB-1#TRPBF offers three reset timeout configurations via the RT pin: tying RT to VCC yields a fixed 200ms timeout; leaving RT floating results in ~400μs; connecting an external capacitor (CRT) from RT to GND sets an adjustable timeout per CRT = tRST × 110 pF/ms. For example, a 2.2nF capacitor produces ~24ms, enabling precise timing alignment with system boot requirements.

Can the LTC2915CDDB-1#TRPBF monitor a 1.0V supply rail?

Yes, the LTC2915CDDB-1#TRPBF supports 1.0V nominal monitoring with –5%, –10%, or –15% tolerance (trip points of 0.950V, 0.900V, or 0.850V respectively) as specified in the Electrical Characteristics table. This is selected by configuring SEL1 = GND and SEL2 = open, with TOL set to VCC/GND/open. The ±1.5% accuracy guarantee applies across the full temperature range, making it suitable for low-voltage SoC power rails.

What is the purpose of the exposed pad (Pin 9) on the DFN package of the LTC2915CDDB-1#TRPBF?

The exposed pad (Pin 9) on the LTC2915CDDB-1#TRPBF's DFN package serves as a thermal and electrical connection point. It may be left unconnected or soldered to the PCB ground plane to improve thermal dissipation (reducing θJA from 76°C/W to lower values) and enhance noise immunity. Unlike some packages, this pad has no electrical function beyond optional grounding-it is not internally connected to any signal or power net.