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Analog Devices Inc. LTC2919IDDB-5#TRMPBF
- Part No.:
- LTC2919IDDB-5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2919IDDB-5#TRMPBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,963
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Product details
Overview
LTC2919IDDB-5#TRMPBF from Analog Devices is a precision triple-input supply monitor IC for automotive and industrial systems, featuring two 0.5V adjustable UV/OV inputs with ±1.5% threshold accuracy over –40°C to +85°C, a third fixed 5V VCC UVLO input (4.35V threshold), open-drain RST/OUT1/OUT2 outputs, and internal 200ms reset timeout - used in core voltage supervision of automotive ECUs and server power rails.
For engineers reviewing the LTC2919IDDB-5#TRMPBF datasheet, LTC2919IDDB-5#TRMPBF pinout, LTC2919IDDB-5#TRMPBF application, or LTC2919IDDB-5#TRMPBF equivalent, key selection criteria include its dual-polarity ADJ inputs (SEL-configurable), 50µA quiescent current, 6.5V shunt-regulated VCC operation, buffered 1V reference for negative-supply offset, and AEC-Q100 qualification for under-hood automotive use.
Technical Context
The LTC2919IDDB-5#TRMPBF implements dual independent comparators with user-selectable polarity per ADJ input via three-state SEL pin (VCC/GND/open), enabling simultaneous monitoring of positive UV, positive OV, negative UV, or negative OV conditions on two supplies. Its third input monitors VCC itself at a precise –10% UVLO threshold (4.35V for 5V nominal).
Reset assertion is synchronized across all inputs: RST remains low until both ADJ inputs are valid *and* VCC exceeds its UVLO threshold for the full timeout period (200ms internal, capacitor-programmable, or disabled). Glitch rejection is achieved via comparator propagation delay filtering and configurable TMR pin logic states - not hysteresis - preserving ±1.5% threshold accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 4.350V (–10% of 5V); enables direct 5V supply monitoring without external divider |
| ADJ Input Threshold | 495–505mV (±1.5% over temp); supports precision UV/OV detection on custom rails |
| Quiescent Current | 50µA typical (–40°C to +85°C); enables always-on monitoring in battery-critical systems |
| Reset Timeout | 200ms internal (TMR = GND); eliminates external timing capacitor for simplified layout |
| Reference Output | 0.990–1.010V buffered REF; drives ≤1mA load for accurate negative-rail offset generation |
| VCC Shunt Regulation | 6.0–7.1V (ICC = 1mA); allows direct connection to 6–12V automotive batteries with series resistor |
| Operating Temp Range | –40°C to +85°C (I-grade); qualified per AEC-Q100 for engine control and ADAS modules |
Pinout & Package
Package: 10-lead (3mm × 2mm) plastic DFN with exposed pad (DDB); RoHS-compliant, lead-free finish; thermal resistance θJA = 76°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SEL (Pin 1) | Three-state polarity select | Configures ADJ1/ADJ2 as (+)UV/(–)OV, (+)UV/(+)UV, or (–)UV/(–)UV - no external components needed |
| VCC (Pin 2) | Power supply input | Accepts 0.5–6V directly; >6V requires series resistor due to integrated 6.5V shunt regulator |
| OUT1 (Pin 3) | Open-drain status output | Asserts low when ADJ1 is invalid (UV/OV per SEL setting); requires external pull-up |
| OUT2 (Pin 4) | Open-drain status output | Asserts low when ADJ2 is invalid; independent of OUT1 and RST timing |
| RST (Pin 5) | Open-drain inverted reset | Held low until *all* inputs (ADJ1, ADJ2, VCC) are valid for full timeout period |
| GND (Pin 6) | Device ground | Reference for all analog inputs and outputs; exposed pad may be tied to GND for thermal relief |
| REF (Pin 7) | Buffered 1V reference | Sources/sinks ≤1mA; used to bias resistive dividers for negative-supply monitoring |
| TMR (Pin 8) | Reset timeout control | GND = 200ms internal timeout; open = ~400µs; VCC = comparator mode (no timeout) |
| ADJ2 (Pin 9) | Adjustable input 2 | 0.5V threshold comparator input; polarity set by SEL; tie to GND if unused |
| ADJ1 (Pin 10) | Adjustable input 1 | 0.5V threshold comparator input; polarity set by SEL; tie to REF if unused |
Key Features
| Feature | Design Value |
|---|---|
| Polarity-selectable dual inputs | SEL pin configures ADJ1/ADJ2 for mixed positive/negative UV/OV detection without external logic |
| Triple independent monitoring | Simultaneous supervision of two adjustable rails + fixed 5V VCC UVLO - no additional ICs required |
| Low-power micropower operation | 50µA ICC enables integration into always-on domains (e.g., CAN wake-up circuits, battery backup rails) |
| Automotive-grade reliability | AEC-Q100 qualified (I-grade), 150°C max junction temperature, and robust ESD tolerance (HBM ≥2kV) |
| Glitch-immune timing architecture | Propagation delay filtering + programmable timeout prevents false resets from transient noise or load spikes |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Sequencing |
|---|---|
Use Scenario: Monitoring 5V microcontroller core rail and 12V sensor supply in under-hood ECU with wide ambient temperature swings. IC Role / Device Role / Timing Role: LTC2919IDDB-5#TRMPBF acts as primary supervisor: VCC monitors 5V rail, ADJ1 monitors 12V via resistor divider, SEL = GND configures ADJ1 for negative-polarity OV detection. Use Value: Prevents ECU lockup during cold cranking (low 5V) or alternator surge (high 12V) with guaranteed reset hold time and AEC-Q100 compliance. |
Use Scenario: Ensuring safe power-up sequence for FPGA, ADC, and isolated I/O in modular PLC backplane. IC Role / Device Role / Timing Role: LTC2919IDDB-5#TRMPBF supervises 3.3V FPGA core (ADJ1) and 24V I/O rail (ADJ2), with RST enabling downstream enable signals only after both rails stabilize. Use Value: Eliminates need for discrete supervisors or FPGA-based power management logic - reduces BOM count and firmware complexity. |
| Server Core Voltage Monitor | Medical Imaging Power Integrity |
Use Scenario: Detecting undervoltage on 1.8V CPU core and overvoltage on 12V cooling fan supply in network server PSU. IC Role / Device Role / Timing Role: LTC2919IDDB-5#TRMPBF uses SEL = VCC to configure both ADJ inputs for positive-polarity UV detection on 1.8V and OV detection on 12V. Use Value: Enables single-chip dual-rail monitoring with ±1.5% accuracy - critical for preventing data corruption during brownout events. |
Use Scenario: Supervising ±15V analog front-end supplies and 5V digital logic in MRI signal chain where fault response must be deterministic. IC Role / Device Role / Timing Role: LTC2919IDDB-5#TRMPBF monitors –15V (ADJ1, SEL = GND) and +5V (VCC) with internal 200ms RST timeout to ensure stable analog bias before acquisition. Use Value: Buffered 1V REF provides precise offset for –15V divider; low 50µA ICC avoids heating sensitive analog sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Single 3.3V fixed UVLO; no adjustable inputs, no polarity selection, no REF output | Only suitable for basic 3.3V rail monitoring - cannot replace dual-rail or negative-supply supervision | Select LTC2919IDDB-5#TRMPBF when monitoring multiple rails, mixed polarities, or requiring buffered reference |
| MAX6316LU31D3+T | Single 3.1V UVLO with 200ms timeout; no ADJ inputs, no SEL, no REF, no shunt regulator | Limited to one fixed-threshold rail; lacks automotive temp range and negative-supply capability | Choose LTC2919IDDB-5#TRMPBF for AEC-Q100 compliance, dual adjustable inputs, and 5V-specific UVLO accuracy |
Compared with TPS3808G33DBVR and MAX6316LU31D3+T, the LTC2919IDDB-5#TRMPBF delivers triple-input flexibility, polarity configurability, and automotive-grade operation - making it uniquely suited for complex multi-rail systems where space, accuracy, and reliability are constrained.
Availability
LTC2919IDDB-5#TRMPBF is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC power sequencing, server PSU supervision, and medical imaging equipment requiring stable component supply with AEC-Q100 traceability and long-term lifecycle support.
Supply support for LTC2919IDDB-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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision power management solutions.
The LTC2919 product line delivers highly accurate, low-power, multi-rail voltage supervisors optimized for automotive and industrial applications demanding guaranteed reset behavior, wide temperature operation, and minimal external components.
FAQ
What is the exact VCC UVLO threshold for LTC2919IDDB-5#TRMPBF?
The LTC2919IDDB-5#TRMPBF has a precisely trimmed VCC undervoltage lockout threshold of 4.350V (–10% of 5V nominal), with ±0.0375V variation over –40°C to +85°C. This value is factory-set and applies specifically to the -5 variant; it is not adjustable and does not require external components to function as a 5V supply monitor.
How does the SEL pin configure polarity for ADJ1 and ADJ2 on LTC2919IDDB-5#TRMPBF?
On the LTC2919IDDB-5#TRMPBF, the SEL pin selects polarity combinations: tied to VCC sets both ADJ1 and ADJ2 for positive-polarity UV detection; left open configures ADJ1 for positive UV and ADJ2 for negative UV; tied to GND sets both for negative-polarity UV. Each configuration enables distinct fault coverage (e.g., +5V UV + –12V UV) without external logic.
Can LTC2919IDDB-5#TRMPBF monitor a 12V automotive battery directly?
Yes - the LTC2919IDDB-5#TRMPBF's VCC pin integrates a 6.5V shunt regulator, allowing direct connection to 12V battery rails when paired with a series current-limiting resistor (e.g., 5.6kΩ for 10–16V operation). The resistor ensures VCC pin current stays within ±10mA absolute maximum rating while enabling accurate 5V UVLO monitoring.
What is the purpose of the REF pin on LTC2919IDDB-5#TRMPBF?
The REF pin on LTC2919IDDB-5#TRMPBF provides a buffered 1.000V reference (±10mV over temperature) used to generate precise offset voltages for negative-supply monitoring. When biasing an ADJ input for –5V UV detection, REF serves as the upper rail of the resistor divider - eliminating dependency on unstable system supplies and ensuring ±1.5% threshold accuracy.
Does LTC2919IDDB-5#TRMPBF support hysteresis on its adjustable inputs?
No - the LTC2919IDDB-5#TRMPBF does not implement internal hysteresis on ADJ1 or ADJ2 inputs to preserve its ±1.5% threshold accuracy specification. Hysteresis is only active in comparator mode (TMR = VCC), where timing functions are disabled. For noise immunity, designers use external RC filters on ADJ pins or rely on the 200ms reset timeout to suppress transient faults.
LTC2919IDDB-5#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 4.425V, Adj, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LTC2919IDDB-5#TRMPBF FAQ
1.How can I place an order for LTC2919IDDB-5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2919IDDB-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 LTC2919IDDB-5#TRMPBF reliable?
The price and inventory of LTC2919IDDB-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 LTC2919IDDB-5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2919IDDB-5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2919IDDB-5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2919IDDB-5#TRMPBF?
LTC2919IDDB-5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2919IDDB-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 LTC2919IDDB-5#TRMPBF?
For technical support, including LTC2919IDDB-5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2919IDDB-5#TRMPBF requirements.
6.How does Aetrix verify that LTC2919IDDB-5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2919IDDB-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 LTC2919IDDB-5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2919IDDB-5#TRMPBF?
All LTC2919IDDB-5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2919IDDB-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 LTC2919IDDB-5#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2919IDDB-5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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