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Analog Devices Inc. LTC2919IDDB-2.5#TRMPBF
- Part No.:
- LTC2919IDDB-2.5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2919IDDB-2.5#TRMPBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:900
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Product details
Overview
LTC2919IDDB-2.5#TRMPBF from Analog Devices is a precision triple/dual-input voltage monitor IC for system-level power supervision, featuring two 0.5V adjustable inputs with ±1.5% threshold accuracy over –40°C to +85°C, a fixed 2.5V supply UVLO input, open-drain RST/OUT1/OUT2 outputs, and pin-selectable polarity for positive/negative supply monitoring in desktop, server, and automotive electronics.
For engineers reviewing the LTC2919IDDB-2.5#TRMPBF datasheet, LTC2919IDDB-2.5#TRMPBF pinout, LTC2919IDDB-2.5#TRMPBF application, or LTC2919IDDB-2.5#TRMPBF equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade operating range (–40°C to +85°C), DFN-10 package details, and real-world use cases for dual-supply UV/OV detection with glitch filtering and configurable reset timeout.
Technical Context
The LTC2919IDDB-2.5#TRMPBF implements dual independent comparators with user-configurable polarity via the three-state SEL pin, enabling simultaneous monitoring of positive and negative supplies for undervoltage or overvoltage faults. Its internal 200ms reset timer (activated by grounding TMR) or external capacitor-based timeout provides deterministic power-up sequencing control.
It integrates a 6.5V shunt regulator on VCC for high-voltage operation (up to 6V direct, >6V with series resistor), a buffered 1.000V reference (±10mV max error, ±1mA drive), and low 50µA quiescent current. Glitch rejection is achieved through propagation delay filtering and output timing synchronization, ensuring reliable fault detection without false triggering during transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 2.175V to 2.250V (–10% of 2.5V nominal; enables third fixed-supply monitoring) |
| ADJ Input Threshold | 495mV to 505mV (0.5V nominal ±1.5%; tight tolerance ensures accurate UV/OV trip points) |
| Quiescent Current | 50µA typical (enables micropower system supervision without significant load impact) |
| Reset Timeout Options | Internal 200ms (TMR = GND), external capacitor (9ms/nF), or disabled (TMR = VCC) |
| Operating Temperature | –40°C to +85°C (I-grade; qualified for industrial and automotive environments) |
| Package | 10-lead 3mm × 2mm DFN with exposed pad (thermal resistance θJA = 76°C/W) |
| Output Type | Open-drain RST, OUT1, OUT2 (supports level-shifting up to 7.5V and pull-up to separate rails) |
Pinout & Package
Package: 10-lead (3mm × 2mm) plastic DFN with exposed thermal pad (Pin 11), RoHS-compliant, lead-free finish. Exposed pad may be left unconnected or tied to GND for improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SEL (Pin 1) | Three-state polarity select input | Determines ADJ1/ADJ2 polarity: VCC = both positive, OPEN = ADJ1+ / ADJ2–, GND = both negative |
| VCC (Pin 2) | Power supply input | Operates as direct supply (≤6V) or shunt-regulated input (>6V); also serves as third UVLO monitor input |
| OUT1 (Pin 3) | Open-drain output 1 | Asserts low when ADJ1 is invalid per selected polarity; requires external pull-up |
| OUT2 (Pin 4) | Open-drain output 2 | Asserts low when ADJ2 is invalid per selected polarity; supports independent fault indication |
| RST (Pin 5) | Open-drain inverted reset output | Asserts low if any monitored input fails or VCC drops below UVLO; held low for timeout period |
| GND (Pin 6) | Ground reference | Primary return path for all internal circuitry and reference output |
| REF (Pin 7) | Buffered 1.000V reference output | Sources/sinks ±1mA; used as offset for negative-supply monitoring; no bypass capacitor required |
| TMR (Pin 8) | Reset timeout control | Configures timeout mode: GND = 200ms internal, open = ~400µs min, 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 (with SEL = GND or OPEN) |
| ADJ1 (Pin 10) | Adjustable input 1 | 0.5V threshold comparator input; polarity set by SEL; tie to REF if unused (with SEL = VCC or OPEN) |
Key Features
| Feature | Design Value |
|---|---|
| Polarity-selectable dual inputs | Single SEL pin configures ADJ1/ADJ2 for +UV/–OV, +UV/+UV, or –UV/–OV monitoring without external components |
| Triple independent monitoring | Two adjustable inputs + VCC UVLO (2.5V variant) provide complete 3-rail supervision in one DFN-10 package |
| Glitch-immune timing architecture | Propagation delay filtering (50–800µs) and programmable reset timeout prevent false triggers from noise or transients |
| Micropower operation | 50µA ICC enables battery-backed or always-on supervision in energy-constrained systems |
| High-voltage compatibility | 6.5V VCC shunt regulator allows direct connection to 5V, 3.3V, or 12V rails with proper current limiting |
Applications
| Desktop Power Sequencing | Automotive Infotainment Supply Monitoring |
|---|---|
|
Use Scenario: Supervising 12V main rail and 3.3V logic rail during cold-crank and load-dump events in PC motherboards. IC Role / Device Role / Timing Role: LTC2919IDDB-2.5#TRMPBF monitors both rails with independent OUT1/OUT2 flags and asserts RST until both stabilize above thresholds. Use Value: Prevents CPU boot failure by holding reset until both supplies meet ±1.5% accuracy requirements post-power-up. |
Use Scenario: Detecting undervoltage on –5V analog audio bias and overvoltage on +15V amplifier supply in vehicle head units. IC Role / Device Role / Timing Role: LTC2919IDDB-2.5#TRMPBF uses SEL = OPEN to configure ADJ1 for –5V UV and ADJ2 for +15V OV detection. Use Value: Enables single-chip protection against battery sag and alternator spikes without discrete comparators or resistive networks. |
| Network Server Core/I/O Voltage Monitoring | Industrial PLC Dual-Rail Power Validation |
|
Use Scenario: Validating 0.85V core and 1.8V I/O supplies in 1U rack servers during hot-swap insertion and thermal throttling. IC Role / Device Role / Timing Role: LTC2919IDDB-2.5#TRMPBF applies REF offset to monitor negative-biased rails and uses TMR = GND for 200ms guaranteed hold time. Use Value: Ensures FPGA configuration completes before release of RST, eliminating boot corruption from marginal supply conditions. |
Use Scenario: Verifying 24V field bus and –12V sensor excitation rails in factory automation controllers under EMI-heavy environments. IC Role / Device Role / Timing Role: LTC2919IDDB-2.5#TRMPBF leverages input glitch rejection and 50µA quiescent current for continuous monitoring in unattended deployments. Use Value: Reduces false trips from motor-drive noise while maintaining ±1.5% trip accuracy across –40°C to +85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326–2.5 | Single 2.5V UV detector only; no adjustable inputs, no polarity selection, no REF output | Only suitable for basic VCC supervision - cannot replace dual-adjustable monitoring capability of LTC2919IDDB-2.5#TRMPBF | Select only when monitoring a single fixed supply with no need for flexibility or negative rail support |
| TPS3808G125 | Fixed 1.25V threshold; no dual inputs, no polarity control, no buffered reference; 1.8–6V VCC range | Lacks triple-monitoring architecture and negative-supply offset capability; not AEC-Q100 qualified | Consider only for cost-sensitive non-automotive designs requiring only one fixed-threshold supervisor |
Compared with MAX6326–2.5 and TPS3808G125, the LTC2919IDDB-2.5#TRMPBF uniquely delivers triple-input supervision with polarity configurability, 1V buffered reference, and automotive qualification - making it irreplaceable for dual-rail or mixed-polarity monitoring where accuracy, flexibility, and reliability are critical.
Availability
LTC2919IDDB-2.5#TRMPBF is available at Aetrix Electronics and suitable for desktop computing, automotive infotainment, and industrial PLC applications requiring stable component supply, AEC-Q100 compliance, and precise dual-supply voltage supervision.
Supply support for LTC2919IDDB-2.5#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and automotive markets.
The LTC2919 product line delivers highly accurate, low-power, multi-rail voltage supervisors optimized for mission-critical power sequencing and fault detection in space-constrained, thermally demanding environments.
FAQ
What is the operating temperature range for LTC2919IDDB-2.5#TRMPBF?
The LTC2919IDDB-2.5#TRMPBF is rated for –40°C to +85°C operation (I-grade), with full electrical specifications guaranteed across this range. It features AEC-Q100 qualification for automotive applications and includes thermal protection up to 150°C junction temperature.
How does the SEL pin configure polarity for ADJ1 and ADJ2 on LTC2919IDDB-2.5#TRMPBF?
On the LTC2919IDDB-2.5#TRMPBF, SEL = VCC sets both ADJ1 and ADJ2 to positive polarity (monitoring +UV/+OV), SEL = GND sets both to negative polarity (–UV/–OV), and SEL left open configures ADJ1 as positive and ADJ2 as negative - enabling mixed-rail monitoring without external logic.
Can LTC2919IDDB-2.5#TRMPBF monitor negative voltages, and how is that implemented?
Yes, the LTC2919IDDB-2.5#TRMPBF monitors negative voltages using its buffered 1.000V REF output as an offset. When configured for negative polarity (e.g., SEL = GND), ADJ1 or ADJ2 detects –UV if the negative rail rises toward ground (e.g., –4.3V on a –5V rail), leveraging the 0.5V comparator threshold referenced to REF.
What are the reset timeout options available on LTC2919IDDB-2.5#TRMPBF?
The LTC2919IDDB-2.5#TRMPBF offers three reset timeout modes: internal 200ms (TMR tied to GND), external capacitor-based (9ms/nF, e.g., 2.2nF = 20ms), or disabled (TMR tied to VCC for comparator-mode immediate response). All modes ensure RST remains asserted until all inputs are valid for the full timeout duration.
Is LTC2919IDDB-2.5#TRMPBF compatible with supplies above 6V, and how is that achieved?
Yes, the LTC2919IDDB-2.5#TRMPBF supports supplies above 6V via its internal 6.5V shunt regulator on VCC. A series current-limiting resistor must be used to keep input current ≤10mA; for example, a 5.6kΩ resistor enables safe operation from a 12V rail while maintaining regulation and UVLO functionality.
LTC2919IDDB-2.5#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:
- 2.213V, 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-2.5#TRMPBF FAQ
1.How can I place an order for LTC2919IDDB-2.5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2919IDDB-2.5#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-2.5#TRMPBF reliable?
The price and inventory of LTC2919IDDB-2.5#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-2.5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2919IDDB-2.5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2919IDDB-2.5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2919IDDB-2.5#TRMPBF?
LTC2919IDDB-2.5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2919IDDB-2.5#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-2.5#TRMPBF?
For technical support, including LTC2919IDDB-2.5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2919IDDB-2.5#TRMPBF requirements.
6.How does Aetrix verify that LTC2919IDDB-2.5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2919IDDB-2.5#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-2.5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2919IDDB-2.5#TRMPBF?
All LTC2919IDDB-2.5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2919IDDB-2.5#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-2.5#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2919IDDB-2.5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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