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Analog Devices Inc. LTC2911HTS8-3#TRMPBF
- Part No.:
- LTC2911HTS8-3#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2911HTS8-3#TRMPBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:599
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Product details
Overview
LTC2911HTS8-3#TRMPBF from Analog Devices (formerly Linear Technology) is a high-accuracy triple supply monitor IC with integrated power-fail comparator and latched reset control, designed for automotive-grade systems. It monitors V1 at 3.3V (±1.5% threshold accuracy), V2 at 1.8V (±1.5%), and an adjustable ADJ input with 500mV nominal threshold; features 200ms internal reset timeout, 30µA typical quiescent current, and operates from –40°C to +125°C.
For engineers reviewing the LTC2911HTS8-3#TRMPBF datasheet, LTC2911HTS8-3#TRMPBF pinout, LTC2911HTS8-3#TRMPBF application, or LTC2911HTS8-3#TRMPBF equivalent, key selection criteria include its automotive temperature rating, triple-supply monitoring capability with independent thresholds, PFI-based early power-fail warning, TMR-latch margining support, and TSOT-23-8 package compatibility with space-constrained PCB layouts.
Technical Context
The LTC2911HTS8-3#TRMPBF implements three independent voltage comparators-V1 (3.3V fixed), V2 (1.8V fixed per -3 variant), and ADJ (500mV nominal)-each with ±1.5% threshold accuracy over full temperature range and built-in glitch filtering. Its power-fail comparator uses PFI input with 500mV falling / 515mV rising thresholds and 15mV typical hysteresis for noise immunity.
Reset timing is configurable via TMR pin: tied to V1 enables 200ms internal timeout; external capacitor sets timeout at ~9.4ms/nF. RST output is actively pulled low during undervoltage and holds low down to VCC = 0.5V; PFO provides early warning of supply collapse with propagation delay under 80µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| V1 Threshold | 3.086V (3.3V −6.5%), guaranteed ±1.5% over −40°C to +125°C |
| V2 Threshold | 1.683V (1.8V −6.5%), specific to LTC2911-3 variant encoded in part number |
| ADJ Threshold | 500mV nominal, ±7.5mV max deviation over temperature |
| Reset Timeout | 200ms internal (TMR = V1); externally programmable down to ~400µs |
| Quiescent Current | 30µA typical at 25°C; ≤35µA across full automotive temperature range |
| PFI Propagation Delay | 8–80µs (min–max), enabling fast response to primary supply droop |
| Operating Temp | −40°C to +125°C (H-grade), qualified for automotive electronics environments |
Pinout & Package
Package: 8-lead TSOT-23 (TS8), 3mm × 1.75mm footprint, exposed pad optional, θJA = 195°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PFI | Power-fail input | Monitors primary supply via resistive divider; triggers PFO low at 500mV falling edge |
| ADJ | Adjustable monitor input | 500mV threshold; configures third supply trip point using external resistor divider |
| TMR | Reset timeout/latch control | Set to V1 for 200ms timeout; pull to GND to latch RST state for margin testing |
| GND | Device ground reference | Return path for all internal comparators and outputs; exposed pad (optional) connects to GND |
| V2 | Second supply monitor | 1.8V −6.5% threshold (1.683V); high-impedance input for LTC2911-3 variant |
| V1 | Primary 3.3V monitor & power source | 3.3V −6.5% threshold (3.086V); supplies internal VCC and RST/PFO pull-up current |
| PFO | Power-fail logic output | Open-drain, weak pull-up to V1; asserts low on PFI < 500mV for early shutdown signaling |
| RST | Reset logic output | Open-drain, weak pull-up to V1; asserts low if any monitored supply falls below threshold |
Key Features
| Feature | Design Value |
|---|---|
| Triple simultaneous monitoring | Independent V1 (3.3V), V2 (1.8V), and ADJ (500mV) inputs enable compact multi-rail supervision without external logic |
| Automotive temperature grade | H-grade (−40°C to +125°C) ensures reliable operation in engine control units, ADAS modules, and infotainment power domains |
| Low-voltage reset guarantee | RST and PFO remain functional down to VCC = 0.5V, preventing indeterminate states during brown-out or cold-cranking conditions |
| Configurable reset latching | TMR pin allows hardware-enforced RST hold for system margin testing without software intervention or external latches |
| Integrated power-fail warning | Dedicated PFI/PFO path delivers sub-80µs early alert before main supply collapse, enabling controlled save-to-NVM or graceful shutdown |
Applications
| Engine Control Unit (ECU) Power Supervision | Advanced Driver Assistance Systems (ADAS) Camera Module |
|---|---|
Use Scenario: Monitors 3.3V microcontroller core rail, 1.8V image sensor I/O rail, and adjustable 1.2V analog front-end rail in automotive ECU. IC Role / Device Role / Timing Role: Triple-supply supervisor with latched reset for fault injection testing and cold-cranking voltage margin validation. Use Value: ±1.5% threshold accuracy prevents false resets during transient load dumps; 200ms timeout aligns with ISO 16750-2 startup timing requirements. | Use Scenario: Supervises 3.3V SoC supply, 1.8V MIPI interface rail, and adjustable 2.8V image sensor bias rail in ADAS camera module. IC Role / Device Role / Timing Role: Power-fail comparator triggers PFO before main rails collapse, initiating immediate NVM save and safe sensor shutdown. Use Value: PFI propagation delay <80µs ensures warning occurs ≥2ms before V1/V2 undervoltage assertion, enabling deterministic recovery sequence. |
| Infotainment Head Unit Power Sequencing | Automotive Telematics Control Unit (TCU) |
Use Scenario: Validates 3.3V application processor core, 1.8V DDR memory interface, and adjustable 5.0V display backlight supply in head unit. IC Role / Device Role / Timing Role: ADJ input configured for 5.0V rail monitoring; TMR pin used to hold RST during firmware update voltage stress tests. Use Value: Latch mode eliminates need for external GPIO control during production test; TSOT-23-8 footprint saves board area in dense layout. | Use Scenario: Monitors 3.3V cellular modem core, 1.8V GNSS receiver rail, and adjustable 3.8V Li-ion battery stack voltage in TCU. IC Role / Device Role / Timing Role: PFI input connected to battery pack via resistor divider; PFO warns of imminent brown-out before modem reset. Use Value: 500mV PFI threshold with 15mV hysteresis rejects noise from CAN bus switching while detecting true battery sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US33D3+T | Single 3.3V reset only; no V2/ADJ monitoring or PFI functionality | Suitable only for basic single-rail reset; lacks triple-monitoring and power-fail warning | Select only when supervising one supply and cost is primary constraint |
| TPS3808G33DBVR | Single 3.3V supervisor with adjustable delay; no secondary supply monitoring or PFI input | Cannot replace triple-monitoring function; requires additional ICs for full LTC2911HTS8-3#TRMPBF capability | Use only in non-automotive designs where extended temperature range is not required |
Compared with MAX6326US33D3+T and TPS3808G33DBVR, the LTC2911HTS8-3#TRMPBF uniquely integrates three independent supply monitors, a dedicated power-fail comparator with early-warning output, and automotive-grade temperature operation in a single TSOT-23-8 package-enabling system-level supervision without component count increase or layout complexity.
Availability
LTC2911HTS8-3#TRMPBF is available at Aetrix Electronics and suitable for automotive ECU power supervision, ADAS camera module reliability assurance, and infotainment head unit sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2911HTS8-3#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 supply monitoring ICs optimized for automotive, industrial, and computing systems demanding high threshold accuracy, low quiescent current, and robust noise immunity across extreme temperatures.
FAQ
What is the exact V2 threshold voltage for LTC2911HTS8-3#TRMPBF?
The LTC2911HTS8-3#TRMPBF is the LTC2911-3 variant, specifying a V2 threshold of 1.683V (1.8V −6.5%) with ±1.5% accuracy over −40°C to +125°C. This value is confirmed in the Electrical Characteristics table under VRT18 parameter and applies exclusively to the -3 suffix version encoded in the full part number.
Does LTC2911HTS8-3#TRMPBF support internal 200ms reset timeout?
Yes, LTC2911HTS8-3#TRMPBF supports internal 200ms reset timeout when the TMR pin is connected to V1. This configuration eliminates the need for an external timing capacitor and is explicitly documented in the datasheet's tRST(INT) specification (140–280ms range, typ. 200ms).
Can LTC2911HTS8-3#TRMPBF monitor a 5V supply on the V2 pin?
No, LTC2911HTS8-3#TRMPBF is the -3 variant and is factory-configured for 1.8V on V2. To monitor 5V, the LTC2911-1 variant (e.g., LTC2911HTS8-1#TRMPBF) must be used; V2 threshold is fixed per variant and not user-adjustable.
What is the minimum operating voltage that guarantees LTC2911HTS8-3#TRMPBF PFO output functionality?
The minimum operating voltage guaranteeing PFO high-state operation is 2.3V, specified as VCC,OP in the Electrical Characteristics table. Below this, PFO may not reliably assert high, though RST and PFO retain low-state drive capability down to VCC = 0.5V.
Is the TSOT-23-8 package of LTC2911HTS8-3#TRMPBF lead-free and RoHS compliant?
Yes, the "PBF" suffix in LTC2911HTS8-3#TRMPBF denotes lead-free finish and RoHS compliance. The device meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for reflow soldering up to 300°C peak temperature.
LTC2911HTS8-3#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:
- 1.683V, 3.086V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LTC2911HTS8-3#TRMPBF FAQ
1.How can I place an order for LTC2911HTS8-3#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2911HTS8-3#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 LTC2911HTS8-3#TRMPBF reliable?
The price and inventory of LTC2911HTS8-3#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2911HTS8-3#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2911HTS8-3#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2911HTS8-3#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2911HTS8-3#TRMPBF?
LTC2911HTS8-3#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2911HTS8-3#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 LTC2911HTS8-3#TRMPBF?
For technical support, including LTC2911HTS8-3#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2911HTS8-3#TRMPBF requirements.
6.How does Aetrix verify that LTC2911HTS8-3#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2911HTS8-3#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 LTC2911HTS8-3#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2911HTS8-3#TRMPBF?
All LTC2911HTS8-3#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2911HTS8-3#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 LTC2911HTS8-3#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2911HTS8-3#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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