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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc. LTC2911CTS8-5#TRMPBF

Name: LTC2911CTS8-5#TRMPBF
Brand: Analog Devices Inc.
SKU: LTC2911CTS8-5#TRMPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC2911CTS8-5#TRMPBF

Manufacturer:: Analog Devices Inc.

Category:: Supervisors

Package:: SOT-23-8 Thin, TSOT-23-8

Datasheet:: LTC2911CTS8-5#TRMPBF.pdf

Description:: IC SUPERVISOR 3 CHANNEL TSOT23-8

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Product details

Overview

LTC2911CTS8-5#TRMPBF from Analog Devices (formerly Linear Technology) is a precision triple supply monitor IC with integrated power-fail comparator and latched reset control. It monitors V1 (3.3V), V2 (adjustable), and ADJ (0.5V threshold) inputs with ±1.5% threshold accuracy over –40°C to 85°C, supports internal 200ms or external capacitor–set timeout, and operates down to 0.5V V_CC. It is used in industrial embedded systems requiring reliable multi-rail power sequencing and early brownout warning.

For engineers reviewing the LTC2911CTS8-5#TRMPBF datasheet, LTC2911CTS8-5#TRMPBF pinout, LTC2911CTS8-5#TRMPBF application, or LTC2911CTS8-5#TRMPBF equivalent, this page delivers verified functional identity, TSOT-23-8 package mapping, confirmed 8-pin terminal roles, exact reset/power-fail timing values, and two validated alternative parts for design-in flexibility.

Technical Context

The LTC2911CTS8-5#TRMPBF implements three independent voltage comparators - one fixed at 3.3V (V1), one adjustable via external divider on V2 (nominal 0.5V threshold), and one on ADJ (also 0.5V threshold). All comparators feature 1.5% accuracy across temperature and built-in glitch filtering for noise immunity.

Its power-fail function uses the PFI input (500mV falling / 515mV rising threshold) to drive PFO low for early warning; RST asserts low when any monitored rail falls below its threshold and remains latched via TMR pin control. Internal V_CC is derived solely from V1 for this -5 variant, enabling operation even when V2 is unpowered.

Key Specifications

Parameter	Value and Actual Design Meaning
V1 Threshold	3.086 V (–6.5% of 3.3V); guaranteed trip point for main system rail monitoring
V2/ADJ Threshold	500 mV ±7.5 mV; enables precise resistive-divider configuration of third supply trip point
PFI Threshold	500 mV falling / 515 mV rising; provides 3% hysteresis for robust power-fail detection
Reset Timeout	200 ms internal (TMR = V1) or 15–27 ms with 2.2 nF external capacitor; configurable hold time before RST release
Supply Current	30 µA typical at 25°C; ultra-low quiescent draw from V1 only, critical for battery-backed systems
Operating Temp	–40°C to +85°C (I-grade); qualified for industrial environments without derating
Min V_CC	0.5 V guaranteed; ensures valid RST/PFO logic states during deep brownout or cold-start conditions

Pinout & Package

Package: 8-Lead Plastic TSOT-23 (TS8), 3.0 mm × 1.7 mm footprint, exposed pad optional, θ_JA = 195°C/W.

Pin/Terminal	Circuit Role	Design Meaning
PFI	Power-fail input	Monitors external supply via resistive divider; triggers PFO low at 500 mV falling edge
ADJ	Adjustable monitor input	0.5 V threshold comparator; used with resistor network to set third supply trip voltage
TMR	Reset timeout/latch control	Connect to V1 for 200 ms internal timeout; pull to GND to latch RST state for margin testing
GND	Device ground reference	Return path for all internal comparators and output drivers; exposed pad may be connected
V2	Second monitor input	High-impedance 0.5 V threshold input (LTC2911-5 variant); replaces fixed-voltage options with full adjustability
V1	Primary 3.3V monitor & V_CC source	3.086 V threshold; powers entire IC; internal pull-ups on RST/PFO reference this pin
PFO	Power-fail open-drain output	Asserts low on PFI undervoltage; weak internal pull-up to V1 (~29 µA); supports external pull-up
RST	Reset open-drain output	Asserts low if V1, V2, or ADJ falls below threshold; same pull-up behavior as PFO

Key Features

Feature	Design Value
Triple simultaneous monitoring	Independent 3.3V (V1), adjustable (V2), and adjustable (ADJ) inputs eliminate need for multiple supervisors
±1.5% threshold accuracy	Reduces required system voltage margin by >2% vs. ±2.5% parts, improving reliability near supply limits
0.5V minimum operating voltage	Ensures deterministic RST/PFO logic states during ultra-low-V_CC brownout, preventing processor lockup
Configurable reset timeout	Internal 200ms option saves BOM cost and board space; external capacitor allows fine-tuning from ~0.4ms to >1s
Reset latch via TMR pin	Enables hardware-based margin testing without software intervention or external logic

Applications

Industrial PLC Power Sequencing	Automotive Body Control Module
Use Scenario: Monitoring 3.3V microcontroller core rail, 5V I/O rail (via V2 divider), and 12V battery backup (via ADJ divider) in programmable logic controllers. IC Role / Device Role / Timing Role: Triple-supply supervisor providing synchronized reset assertion, power-fail warning (PFO), and latch-enabled margin testing during field calibration. Use Value: Eliminates discrete reset ICs and reduces risk of spurious resets due to ±1.5% threshold tolerance and built-in glitch filtering.	Use Scenario: Supervising 3.3V MCU, 5V CAN transceiver, and 12V battery input in body control units with cold-cranking capability. IC Role / Device Role / Timing Role: Monitors primary rails while using PFI to detect battery sag; asserts PFO before RST to trigger graceful shutdown of non-critical loads. Use Value: 0.5V V_CC guarantee ensures valid reset signaling even during 6V cranking events where other supervisors fail.
Medical Infusion Pump Logic Supply	Network Equipment Line Card
Use Scenario: Validating 3.3V processor rail, isolated 24V pump driver supply (via ADJ), and backup supercap voltage (via PFI) in safety-critical infusion devices. IC Role / Device Role / Timing Role: Provides redundant undervoltage detection with latched RST for fault logging and failsafe motor disable. Use Value: TMR latch mode enables deterministic reset state capture during ESD or transient-induced voltage dips.	Use Scenario: Monitoring 3.3V FPGA configuration rail, 12V DC/DC input, and -48V telecom supply (via PFI divider) on modular line cards. IC Role / Device Role / Timing Role: Generates early PFO warning on -48V sag to initiate hot-swap controller sequencing before V1/V2 collapse. Use Value: Independent PFI comparator with 3% hysteresis prevents chatter during noisy telecom supply transitions.

Industrial PLC Power Sequencing

Automotive Body Control Module

Use Scenario: Monitoring 3.3V microcontroller core rail, 5V I/O rail (via V2 divider), and 12V battery backup (via ADJ divider) in programmable logic controllers.

IC Role / Device Role / Timing Role: Triple-supply supervisor providing synchronized reset assertion, power-fail warning (PFO), and latch-enabled margin testing during field calibration.

Use Value: Eliminates discrete reset ICs and reduces risk of spurious resets due to ±1.5% threshold tolerance and built-in glitch filtering.

Use Scenario: Supervising 3.3V MCU, 5V CAN transceiver, and 12V battery input in body control units with cold-cranking capability.

IC Role / Device Role / Timing Role: Monitors primary rails while using PFI to detect battery sag; asserts PFO before RST to trigger graceful shutdown of non-critical loads.

Use Value: 0.5V V_CC guarantee ensures valid reset signaling even during 6V cranking events where other supervisors fail.

Medical Infusion Pump Logic Supply

Network Equipment Line Card

Use Scenario: Validating 3.3V processor rail, isolated 24V pump driver supply (via ADJ), and backup supercap voltage (via PFI) in safety-critical infusion devices.

IC Role / Device Role / Timing Role: Provides redundant undervoltage detection with latched RST for fault logging and failsafe motor disable.

Use Value: TMR latch mode enables deterministic reset state capture during ESD or transient-induced voltage dips.

Use Scenario: Monitoring 3.3V FPGA configuration rail, 12V DC/DC input, and -48V telecom supply (via PFI divider) on modular line cards.

IC Role / Device Role / Timing Role: Generates early PFO warning on -48V sag to initiate hot-swap controller sequencing before V1/V2 collapse.

Use Value: Independent PFI comparator with 3% hysteresis prevents chatter during noisy telecom supply transitions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6369AUT+T	Fixed 3.3V/5V/12V thresholds; no adjustable V2; 200ms fixed timeout only; 1.8µA quiescent current	Lower power but inflexible for custom rail voltages; lacks PFI hysteresis tuning and latch mode	Select when monitoring only standard rails and ultra-low I_Q is prioritized over configurability
TPS3808G33DBVR	Single 3.3V monitor; requires external circuitry for triple-rail support; 200ms/400ms selectable timeout; ±2.5% threshold accuracy	Higher BOM count and layout complexity for multi-rail systems; less accurate trip points increase design margin	Select only for simple 3.3V-only supervision where cost per channel outweighs integration benefits

Compared with MAX6369AUT+T and TPS3808G33DBVR, the LTC2911CTS8-5#TRMPBF uniquely combines adjustable V2/ADJ inputs, 0.5V minimum V_CC, and hardware latch mode-enabling single-chip triple-rail supervision with field-testable margining and brownout resilience unmatched by either alternative.

Availability

LTC2911CTS8-5#TRMPBF is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, medical device power management, and telecom infrastructure requiring stable component supply and long-term lifecycle assurance.

Supply support for LTC2911CTS8-5#TRMPBF 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) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.

The LTC2911 product line delivers precision power supervision ICs optimized for industrial, automotive, and medical systems demanding tight threshold accuracy, ultra-low voltage operation, and configurable reset behavior under harsh electrical conditions.

FAQ

What is the exact V2 input configuration for LTC2911CTS8-5#TRMPBF?

The LTC2911CTS8-5#TRMPBF uses the "-5" variant, meaning its V2 pin functions as a high-impedance adjustable monitor input with a nominal 0.5V threshold-identical to the ADJ pin. This allows full customization of the second monitored rail's trip point using an external resistive divider, unlike fixed-voltage variants (-1 through -4).

Does LTC2911CTS8-5#TRMPBF require external pull-up resistors on RST and PFO?

LTC2911CTS8-5#TRMPBF provides internal weak pull-up current (~29 µA at V1 = 3.3V) to V1 on both RST and PFO. External pull-ups are optional but recommended for faster rise times or when driving loads exceeding the internal capability-especially if V1 < 3.3V or higher VOH than V1 is needed.

How does the TMR pin enable reset latching in LTC2911CTS8-5#TRMPBF?

Pulling the TMR pin to GND forces the RST output into a latched state-holding its current logic level regardless of subsequent input conditions. Releasing TMR (to high-impedance or V1) restores normal monitoring after setup/hold timing; this feature simplifies hardware margin testing without firmware involvement.

What is the guaranteed minimum supply voltage for LTC2911CTS8-5#TRMPBF to maintain valid RST/PFO outputs?

LTC2911CTS8-5#TRMPBF guarantees correct RST and PFO logic states down to V_CC = 0.5V. Since V_CC is derived solely from V1 in this -5 variant, the V1 rail must remain ≥0.5V for deterministic output behavior during deep brownout or cold-start scenarios.

Can LTC2911CTS8-5#TRMPBF monitor the same supply on both ADJ and PFI inputs?

Yes-LTC2911CTS8-5#TRMPBF supports combined monitoring using a single three-resistor divider network connecting to both ADJ and PFI. This configuration enables coordinated reset and power-fail signaling from one supply, with independent thresholds (e.g., 4.0V for ADJ reset, 4.5V for PFI warning) as detailed in Figure 4 of the datasheet.

LTC2911CTS8-5#TRMPBF Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: SOT-23-8 Thin, TSOT-23-8

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Type:: Multi-Voltage Supervisor

Number of Voltages Monitored:: 3

Voltage - Threshold:: 3.086V, Adj, Adj

Output:: Push-Pull, Totem Pole

Reset:: Active Low

Reset Timeout:: Adjustable/Selectable

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TSOT-23-8

LTC2911CTS8-5#TRMPBF FAQ

1.How can I place an order for LTC2911CTS8-5#TRMPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC2911CTS8-5#TRMPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LTC2911CTS8-5#TRMPBF reliable?

The price and inventory of LTC2911CTS8-5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2911CTS8-5#TRMPBF is usually 5 days.

3.What payment methods are accepted for LTC2911CTS8-5#TRMPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2911CTS8-5#TRMPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC2911CTS8-5#TRMPBF?

LTC2911CTS8-5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC2911CTS8-5#TRMPBF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LTC2911CTS8-5#TRMPBF?

For technical support, including LTC2911CTS8-5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2911CTS8-5#TRMPBF requirements.

6.How does Aetrix verify that LTC2911CTS8-5#TRMPBF is sourced from the original manufacturer or authorized distributors?

All LTC2911CTS8-5#TRMPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC2911CTS8-5#TRMPBF meets industry standards.

7.What is the process for return or replacement of LTC2911CTS8-5#TRMPBF?

All LTC2911CTS8-5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2911CTS8-5#TRMPBF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LTC2911CTS8-5#TRMPBF part is unused and in its original packaging.

Return procedure for LTC2911CTS8-5#TRMPBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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