Analog Devices Inc. LTC2930HDD#TRPBF

Overview

LTC2930HDD#TRPBF from Analog Devices (formerly Linear Technology) is a configurable six-supply voltage monitor IC with ±1.5% threshold accuracy, adjustable reset timeout via external capacitor, manual reset input, and guaranteed RST output operation down to VCC = 1V. It supports 16 preset combinations of 5V/3.3V/3V/2.5V/1.8V/1.5V and ±adjustable thresholds, and operates across –40°C to 125°C for automotive and industrial power sequencing.

For engineers reviewing the LTC2930HDD#TRPBF datasheet, LTC2930HDD#TRPBF pinout, LTC2930HDD#TRPBF application, or LTC2930HDD#TRPBF equivalent, key selection criteria include guaranteed high-temperature operation (–40°C to 125°C), 12-lead 3mm × 3mm DFN package, 52μA supply current, ±1.5% voltage threshold accuracy over temperature, and support for both positive and negative adjustable inputs (e.g., –5.2V monitoring).

Technical Context

The LTC2930HDD#TRPBF implements six independent comparators with programmable thresholds selected via a resistive divider on the VPG pin, enabling 16 fixed or adjustable combinations. Its internal bandgap reference (1.210V ±1.5%) feeds both the VPG threshold selection network and the –ADJ mode level-shifting circuitry.

Reset assertion is synchronized across all six monitored supplies: RST pulls low if any input falls below its configured threshold and remains low for the CRT-set timeout after all inputs recover. The open-drain RST output features a weak 6μA internal pull-up to V2 and guarantees correct logic state down to VCC = 1V, with VOL ≤ 0.4V at 3mA sink current.

Key Specifications

Pinout & Package

Package: 12-lead 3mm × 3mm plastic DFN (DD package) with exposed pad (Pin 13) connected to GND. RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar six-supply monitoring applications.

Compared with LTC2931CDD#TRPBF, LTC2930HDD#TRPBF offers smaller 3mm × 3mm DFN footprint and unified reset signaling, while LTC2909CMS8E#TRPBF trades channel count and configurability for higher accuracy and lower cost in basic triple-monitor roles.

Availability

LTC2930HDD#TRPBF is available at Aetrix Electronics and suitable for automotive power sequencing, industrial PLC I/O modules, telecom line cards, and medical imaging subsystems requiring stable component supply across extended temperature ranges.

Supply support for LTC2930HDD#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2930HDD#TRPBF belongs to Linear's precision power supervision product line, designed specifically for multivoltage systems requiring high-accuracy, temperature-stable reset generation and flexible rail configuration in harsh environments.

FAQ

What is the maximum operating temperature rating for the LTC2930HDD#TRPBF?

The LTC2930HDD#TRPBF is rated for operation from –40°C to +125°C, making it suitable for under-hood automotive applications and extended-temperature industrial environments. This H-grade qualification is confirmed in the Absolute Maximum Ratings table and distinguishes it from C-grade (0°C to 70°C) and I-grade (–40°C to 85°C) variants of the same device family.

How does the LTC2930HDD#TRPBF support monitoring of negative supply voltages like –5.2V?

The LTC2930HDD#TRPBF supports negative voltage monitoring via its –ADJ mode on the V4 input. In this mode, the internal reference is shifted to ground using the buffered 1.210V VREF output, allowing an external resistive divider between the negative supply and VREF to generate a positive voltage at V4 that crosses the 0.5V comparator threshold. Example values: for –5.2V, use R3 = 487kΩ and R4 = 121kΩ (per Table 3).

What is the function of the CRT pin on the LTC2930HDD#TRPBF, and how is the reset timeout calculated?

The CRT pin on the LTC2930HDD#TRPBF sets the reset timeout period by connecting an external capacitor to GND. The timeout scales at 2ms per nanofarad (e.g., 47nF yields 94ms). Leaving CRT open results in ~25μs minimum delay. The relationship is tRST = CRT × 2MΩ; leakage current (2μA nominal) and capacitor tolerance directly affect timing accuracy, so low-leakage ceramic capacitors are recommended.

Can the LTC2930HDD#TRPBF monitor fewer than six supply rails?

Yes, the LTC2930HDD#TRPBF can monitor fewer than six rails. Unused inputs (V3–V6) should be tied to V1 to disable them. The device automatically configures only the enabled inputs based on the VPG-selectable mode. This flexibility reduces quiescent current and simplifies design for systems with 2–5 supply rails while retaining the same high-accuracy supervision capability.

What is the guaranteed minimum supply voltage (VCC) at which the RST output remains valid on the LTC2930HDD#TRPBF?

The RST output of the LTC2930HDD#TRPBF is guaranteed to maintain correct logic state down to VCC = 1V. This is specified in the Electrical Characteristics table under "Minimum Internal Operating Voltage" and ensures reliable reset assertion during brownout and controlled power-down sequences, even as primary supplies collapse.