Analog Devices Inc. LTC2934CDC-1#TRPBF

Overview

LTC2934CDC-1#TRPBF from Analog Devices (acquired Linear Technology) is an ultra-low power adjustable voltage supervisor IC with independent power-fail and reset functions, 500nA typical quiescent current, ±1.5% threshold accuracy over temperature, and open-drain RST/PFO outputs. It operates from 1.6V to 5.5V supply and delivers early warning of battery depletion in portable medical monitors, coin-cell IoT sensors, and handheld POS terminals.

For engineers reviewing the LTC2934CDC-1#TRPBF datasheet, LTC2934CDC-1#TRPBF pinout, LTC2934CDC-1#TRPBF application, or LTC2934CDC-1#TRPBF equivalent, key selection criteria include its 0.4V internal reference, 15ms/200ms selectable reset timeout, manual reset input with 900kΩ internal pull-up, and compatibility with 2mm × 2mm DFN packaging for space-constrained battery-powered designs.

Technical Context

The LTC2934CDC-1#TRPBF integrates two precision comparators-one monitoring ADJ for reset generation and one monitoring PFI for power-fail signaling-each with 0.4V nominal threshold and programmable hysteresis (20mV for ADJ, 10mV for PFI). Its internal reset timer activates only after ADJ exceeds threshold by 5%, ensuring stable release after brownout recovery.

It features dual configurable inputs (ADJ and PFI) accepting external resistive dividers to set falling thresholds independently, RT input selecting 15ms or 200ms reset timeout, and MR input with 0.4V logic threshold and 20μs minimum pulse width support. All outputs are open-drain, enabling level-shifting up to 5.5V independent of VCC.

Key Specifications

Pinout & Package

Package: 8-Lead (2mm × 2mm) Plastic DFN with exposed pad (pin 9, optional GND connection). RoHS-compliant, lead-free finish, rated for 0°C to 70°C ambient operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2934CDC-1#TRPBF, LTC2935IDC-1#TRPBF reduces external component count for standardized thresholds but sacrifices fine-grained adjustability, while LTC2909IDC-1#TRPBF adds UV/OV and negative rail support at the cost of 3× higher quiescent current - making LTC2934CDC-1#TRPBF optimal for battery-critical, single-rail, precision-adjustable supervision.

Availability

LTC2934CDC-1#TRPBF is available at Aetrix Electronics and suitable for portable medical sensors, coin-cell IoT endpoints, and handheld point-of-sale terminals requiring stable component supply with guaranteed long-term manufacturability.

Supply support for LTC2934CDC-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. (ADI) acquired Linear Technology in 2017 and maintains its high-performance analog and power management product lines with rigorous automotive and industrial qualification standards.

The LTC2934 family was designed specifically for ultra-low-power battery supervision in space-constrained portable electronics, emphasizing sub-1μA operation, precision threshold matching, and flexible reset/power-fail signaling in miniature DFN and TSOT-23 packages.

FAQ

What is the operating temperature range for the LTC2934CDC-1#TRPBF?

The LTC2934CDC-1#TRPBF is specified for 0°C to 70°C ambient operation, as indicated by the "C" grade suffix in the part number. This distinguishes it from the "I" grade (–40°C to 85°C) variants like LTC2934IDC-1#TRPBF. The DFN package's θJA is 102°C/W, supporting reliable thermal performance within this commercial temperature range.

How does the LTC2934CDC-1#TRPBF differ from the LTC2934CTS8-1#TRPBF?

The LTC2934CDC-1#TRPBF uses an 8-lead 2mm × 2mm plastic DFN package, while the LTC2934CTS8-1#TRPBF uses an 8-lead TSOT-23 package. Both share identical electrical specifications, temperature grade (0°C to 70°C), and open-drain output configuration (-1 variant), but differ in footprint, thermal resistance (θJA = 102°C/W vs. 195°C/W), and board area requirements - DFN offers superior thermal and space efficiency.

Can the LTC2934CDC-1#TRPBF monitor two different supply rails simultaneously?

Yes, the LTC2934CDC-1#TRPBF can monitor two rails using separate resistor dividers on ADJ and PFI inputs. For example, ADJ can be biased from a 3.3V rail to trigger reset at 2.55V, while PFI is biased from a 5V rail to signal power-fail at 4.2V. The datasheet confirms independent threshold setting and ±2mV matching between inputs, enabling coordinated dual-rail supervision without additional ICs.

What is the maximum allowable voltage on the PFO and RST pins of the LTC2934CDC-1#TRPBF?

The PFO and RST pins of the LTC2934CDC-1#TRPBF support voltages up to 6V per Absolute Maximum Ratings, independent of VCC. As open-drain outputs, they tolerate pull-up voltages higher than VCC (e.g., 5V pull-up while VCC = 1.8V), enabling interoperability across mixed-voltage systems - a key advantage over supervisors with internal diode clamps limiting pull-up to VCC + 0.3V.

Does the LTC2934CDC-1#TRPBF require external components for basic operation?

The LTC2934CDC-1#TRPBF requires only a 0.1μF VCC bypass capacitor for stable operation. Resistive dividers on ADJ and PFI are needed only if custom thresholds differ from the internal 0.4V reference; otherwise, tying ADJ/PFI directly to the monitored rail sets thresholds at 0.4V. No external timing components are needed due to the integrated 15ms/200ms reset timeout generator controlled by the RT pin.