Analog Devices Inc. LTC2919HMS-2.5#PBF

Overview

LTC2919HMS-2.5#PBF from Analog Devices is a precision triple-input voltage supervisor IC for automotive and industrial power monitoring. It monitors two adjustable inputs (±1.5% threshold accuracy at 0.5V nominal) and a fixed 2.5V supply via VCC UVLO, features open-drain RST/OUT1/OUT2 outputs, 200ms internal reset timeout, and operates from –40°C to 125°C in MSOP-10 package.

For engineers reviewing the LTC2919HMS-2.5#PBF datasheet, LTC2919HMS-2.5#PBF pinout, LTC2919HMS-2.5#PBF application, or LTC2919HMS-2.5#PBF equivalent, this page delivers verified specifications, polarity-selectable dual-input monitoring logic, glitch-filtered timing behavior, and automotive-grade thermal performance - all confirmed for the exact H-grade MSOP variant.

Technical Context

The LTC2919HMS-2.5#PBF implements dual independent comparator channels with user-configurable input polarity (via three-state SEL pin), each referenced to a tightly specified 492.5–507.5mV threshold over temperature. Its third monitoring channel uses the VCC pin's –10% UVLO (2.175–2.250V range) to supervise a 2.5V supply without external components.

Reset assertion is synchronized across all monitored inputs: RST remains low until both ADJ inputs and VCC are valid for the full timeout period (200ms internal, externally programmable, or disabled). The buffered 0.985–1.015V REF output enables accurate negative-supply offset referencing, while the 6.5V shunt regulator on VCC allows operation up to 7.5V with current limiting.

Key Specifications

Pinout & Package

Package: 10-Lead Plastic MSOP (3mm × 3mm), exposed pad not connected, rated for TJMAX = 150°C and θJA = 120°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G33DBVR and MAX6326LT29D3+T, the LTC2919HMS-2.5#PBF provides unique dual adjustable inputs with polarity control, integrated 1V REF, and guaranteed –40°C to 125°C operation - making it irreplaceable for automotive and industrial mixed-rail monitoring where accuracy, flexibility, and thermal robustness are mandatory.

Availability

LTC2919HMS-2.5#PBF is available at Aetrix Electronics and suitable for automotive ECU power sequencing, industrial PLC I/O supervision, infotainment head unit brownout protection, and telecom server PSU redundancy requiring stable component supply across extended temperature ranges.

Supply support for LTC2919HMS-2.5#PBF 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and automotive markets since 1965.

The LTC2919 product line delivers precision, low-power, multi-rail voltage supervision for safety-critical automotive and industrial systems - designed specifically to replace discrete comparator solutions with guaranteed accuracy, glitch immunity, and AEC-Q100 compliance.

FAQ

What is the guaranteed operating temperature range for LTC2919HMS-2.5#PBF?

The LTC2919HMS-2.5#PBF is rated for –40°C to +125°C junction temperature, with full electrical specifications guaranteed across this range. This H-grade rating meets AEC-Q100 requirements for under-hood automotive applications and high-temperature industrial environments. The MSOP package has θJA = 120°C/W, enabling reliable operation with standard PCB copper pour.

How does the SEL pin configure polarity for ADJ1 and ADJ2 on LTC2919HMS-2.5#PBF?

On the LTC2919HMS-2.5#PBF, the SEL pin sets polarity combinations: tied to VCC gives both ADJ inputs positive polarity (+UV/–OV), left open gives ADJ1 positive and ADJ2 negative, and tied to GND gives both negative (–UV/+OV). This enables monitoring of two positive supplies, two negative supplies, or one of each - all without external resistors or logic gates.

Can LTC2919HMS-2.5#PBF monitor a –5V supply directly?

Yes - the LTC2919HMS-2.5#PBF monitors negative supplies using its REF output (1V) as a bias reference. For –5V, connect ADJ1 to a resistor divider between –5V and REF, configure SEL = GND for negative polarity, and set the divider ratio so ADJ1 = 0.5V when –5V is nominal. The internal comparator then asserts OUT1 low if –5V rises above –4.75V (–5V +5%).

What is the reset timeout behavior when multiple inputs fail on LTC2919HMS-2.5#PBF?

When any monitored input (ADJ1, ADJ2, or VCC) fails, RST immediately asserts low. After all inputs return to valid states, the LTC2919HMS-2.5#PBF starts the full reset timeout (200ms internal, or programmed value) before releasing RST. If any input fails again during the timeout, the timer resets and restarts - ensuring RST remains asserted until all rails remain stable for the complete duration.

Does LTC2919HMS-2.5#PBF require external components for basic 2.5V supply monitoring?

No - the LTC2919HMS-2.5#PBF monitors its own VCC pin as a 2.5V supply via built-in –10% UVLO (2.175–2.250V range), requiring only a 0.1µF bypass capacitor on VCC. For dual-rail monitoring, only resistor dividers on ADJ1/ADJ2 and pull-up resistors on RST/OUT1/OUT2 are needed - no timing capacitors or reference ICs required when using internal 200ms timeout.