Analog Devices Inc. LTC2934IDC-1#TRPBF

Overview

LTC2934IDC-1#TRPBF from Analog Devices (acquired Linear Technology) is an ultra-low power, adjustable voltage supervisor IC with independent power-fail warning and reset generation functions. It features 500nA typical quiescent current, ±1.5% threshold accuracy over temperature, 1.6V minimum supply operation, and open-drain RST/PFO outputs. It is used in battery-powered portable equipment to provide early low-voltage detection and controlled system reset.

For engineers reviewing the LTC2934IDC-1#TRPBF datasheet, LTC2934IDC-1#TRPBF pinout, LTC2934IDC-1#TRPBF application, or LTC2934IDC-1#TRPBF equivalent, key selection criteria include its 0.4V internal comparator threshold, selectable 15ms/200ms reset timeout via RT pin, –40°C to 85°C industrial temperature grade, and DFN (2mm × 2mm) package compatibility with space-constrained designs.

Technical Context

The LTC2934IDC-1#TRPBF integrates two independent precision comparators-one for reset (ADJ input) and one for power-fail warning (PFI input)-each referenced to a stable 0.4V internal threshold. Hysteresis is fixed at 5% for ADJ (reset) and 2.5% for PFI (power-fail), ensuring noise immunity during voltage transitions.

Its reset timeout is digitally selected via the RT pin (GND = 15ms, VCC = 200ms), and manual reset is supported through an internally pulled-up MR input with 900kΩ pull-up and 20μs minimum pulse width requirement. The device operates down to 1.6V VCC and draws only 225–1000nA across the full temperature range.

Key Specifications

Pinout & Package

Package: 8-Lead (2mm × 2mm) Plastic DFN with exposed pad (pin 9, optional GND connection). 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 LTC2935IDC-1#TRPBF, the LTC2934IDC-1#TRPBF provides finer threshold control via external resistors and lower design complexity for custom voltage points; compared with LTC2909IDC-1#TRPBF, it delivers 2.4× lower ICC for battery longevity where only UV monitoring is needed.

Availability

LTC2934IDC-1#TRPBF is available at Aetrix Electronics and suitable for portable medical sensors, wireless IoT endpoints, and point-of-sale terminals requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LTC2934IDC-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 reliability testing and automotive/industrial qualification.

The LTC2934 belongs to Linear's ultralow-power supervisor family, designed specifically for battery-critical applications where sub-1μA ICC, precise threshold control, and early power-fail warning are mandatory for system integrity.

FAQ

What is the function of the RT pin on the LTC2934IDC-1#TRPBF?

The RT pin on the LTC2934IDC-1#TRPBF selects the reset timeout duration: connecting RT to GND configures a 15ms delay, while connecting RT to VCC selects 200ms. This digital selection eliminates external timing components and is valid across the full –40°C to 85°C operating range. The LTC2934IDC-1#TRPBF does not require pull-up or pull-down resistors on RT, as its internal logic senses the voltage level directly.

How does the LTC2934IDC-1#TRPBF differ from the LTC2934IDC-2#TRPBF?

The LTC2934IDC-1#TRPBF features open-drain RST and PFO outputs, requiring external pull-up resistors and supporting level-shifting up to 5.5V. In contrast, the LTC2934IDC-2#TRPBF uses active pull-up outputs tied to VCC, eliminating external resistors but limiting output voltage to VCC. Both share identical threshold accuracy, quiescent current, and temperature range; the choice depends on system-level voltage translation and board space constraints.

Can the LTC2934IDC-1#TRPBF monitor two different supply voltages simultaneously?

Yes-the LTC2934IDC-1#TRPBF can monitor two supplies using separate resistive dividers on ADJ and PFI, or a shared divider with three-resistor configuration (as shown in Figure 1 of the datasheet). The ADJ input controls RST assertion, while PFI independently triggers PFO at a higher threshold for early warning. This dual-monitoring capability is confirmed in the Applications Information section and enables coordinated shutdown sequencing in multi-rail systems.

What is the maximum input leakage current specification for ADJ and PFI on the LTC2934IDC-1#TRPBF?

The LTC2934IDC-1#TRPBF specifies ±1nA maximum input leakage current for both ADJ and PFI pins over the full –40°C to 85°C temperature range. This low leakage enables use of high-value resistive dividers (up to ~8MΩ total) without introducing significant threshold error-critical for preserving battery life while maintaining ±1.5% accuracy in portable applications.

Is the exposed pad on the LTC2934IDC-1#TRPBF's DFN package required to be connected to ground?

No-the exposed pad (pin 9) on the LTC2934IDC-1#TRPBF's 8-lead DFN package is optional for grounding. It may be left floating or connected to PCB GND to improve thermal performance. The datasheet explicitly states "Exposed Pad (DFN Only): Exposed Pad may be left floating or connected to device ground," and thermal characterization (θJA = 102°C/W) assumes optional GND connection-not mandatory soldering.