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Analog Devices Inc. LTC2919HDDB-3.3#TRMPBF
- Part No.:
- LTC2919HDDB-3.3#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2919HDDB-3.3#TRMPBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:375
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Product details
Overview
LTC2919HDDB-3.3#TRMPBF from Analog Devices is a precision triple-input UV/OV monitor IC for system power supervision, featuring two 0.5V adjustable inputs with ±1.5% threshold accuracy over –40°C to +125°C, a fixed 3.3V supply UVLO input, open-drain RST/OUT1/OUT2 outputs, and internal 200ms reset timeout - deployed in automotive core voltage monitoring and industrial PLC power sequencing.
For engineers reviewing the LTC2919HDDB-3.3#TRMPBF datasheet, LTC2919HDDB-3.3#TRMPBF pinout, LTC2919HDDB-3.3#TRMPBF application, or LTC2919HDDB-3.3#TRMPBF equivalent, key selection factors include its guaranteed VCC UVLO at 2.871–2.970V, 50µA quiescent current, 10-lead 3mm × 2mm DFN package with exposed pad, and polarity-selectable ADJ inputs enabling dual positive/negative supply fault detection without external components.
Technical Context
The LTC2919HDDB-3.3#TRMPBF implements dual independent comparator channels with user-configurable input polarity (via three-state SEL pin), each referenced to a precise 495–505mV threshold, plus a dedicated VCC UVLO circuit calibrated for 3.3V nominal supply (2.871–2.970V trip range). All thresholds maintain ±1.5% accuracy across –40°C to +125°C.
Its reset logic combines glitch-filtered comparator propagation (50–800µs) with configurable timeout: internal 200ms timer (TMR = GND), external capacitor-based timing (9ms/nF), or comparator mode (TMR = VCC). Outputs are open-drain with guaranteed low-state operation down to VCC = 0.5V and 0.15V VOL at 2.5mA sink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 2.871V to 2.970V - precisely monitors 3.3V supply for –10% undervoltage with no external components |
| ADJ Input Threshold | 495mV to 505mV - enables accurate UV/OV detection of any supply via resistor divider, ±1.5% over full temp range |
| Quiescent Current | 50µA typical - supports always-on monitoring in battery-backed or low-power industrial systems |
| Reset Timeout Options | Internal 200ms, external capacitor (9ms/nF), or disabled - eliminates need for external RC timing network in most designs |
| Operating Temp Range | –40°C to +125°C - qualified per AEC-Q100 for under-hood automotive and high-temp industrial environments |
| Output Type | Open-drain RST/OUT1/OUT2 - allows level-shifting, wired-OR logic, and pull-up to higher voltage than VCC |
| Reference Output | 1.000V buffered REF - provides stable offset for negative-supply monitoring without loading sensitivity |
Pinout & Package
Package: 10-lead 3mm × 2mm plastic DFN (DDB) with exposed thermal pad (Pin 11), rated for θJA = 76°C/W and TJMAX = 150°C. 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 | Determines ADJ1/ADJ2 input polarity: VCC = both positive, OPEN = ADJ1+ / ADJ2−, GND = both negative - no external resistors needed |
| VCC (Pin 2) | Power supply input | Operates directly up to 6V; includes 6.5V shunt regulator for >6V supplies - also serves as third monitored input via UVLO |
| OUT1 (Pin 3) | Adjustable input 1 status output | Asserts low when ADJ1 violates configured UV/OV condition - open-drain, supports pull-up to any voltage ≤7.5V |
| OUT2 (Pin 4) | Adjustable input 2 status output | Asserts low when ADJ2 violates configured UV/OV condition - independent of OUT1, enables dual-fault isolation |
| RST (Pin 5) | Master reset output | Inverted open-drain output asserting low if any monitored input fails or during timeout - held low until all inputs valid for full timeout period |
| GND (Pin 6) | Ground reference | Primary return path for all internal circuits and REF output - must be low-impedance for accurate threshold operation |
| REF (Pin 7) | Buffered 1V reference | Sources/sinks up to 1mA; used to bias ADJ inputs for negative-supply monitoring - no bypass capacitor required |
| TMR (Pin 8) | Reset timeout control | GND = 200ms internal timeout; open = ~400µs min; VCC = comparator mode (no timeout); capacitor to GND = 9ms/nF timing |
| 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 | SEL pin configures ADJ1/ADJ2 for +UV/–OV, –UV/+OV, or +UV/+OV monitoring - eliminates need for external polarity-reversal circuitry |
| Triple independent monitoring | Simultaneous supervision of two adjustable supplies + fixed 3.3V VCC UVLO - reduces BOM count vs discrete supervisor solutions |
| Glitch-immune timing architecture | Combined comparator propagation delay filtering (50–800µs) and programmable reset timeout prevent false resets from transients or noise |
| Low-voltage output drive | RST/OUT1/OUT2 guaranteed low down to VCC = 0.5V - ensures deterministic reset assertion during brownout and power-up sequencing |
| AEC-Q100 qualified | H-grade (–40°C to +125°C) qualification enables use in automotive engine control, ADAS power domains, and under-hood ECUs |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Sequencing |
|---|---|
Use Scenario: Monitors 3.3V microcontroller core supply and 5V I/O rail in diesel ECU, detecting undervoltage during cranking and overvoltage from alternator spikes. IC Role / Device Role / Timing Role: Triple-input supervisor providing independent UV/OV fault detection on VCC (3.3V), ADJ1 (5V via resistor divider), and ADJ2 (–12V bias via REF offset). Use Value: Enables fail-safe shutdown before MCU corruption; internal 200ms timeout prevents nuisance resets during transient cranking dips. |
Use Scenario: Ensures safe startup sequence for multi-rail industrial controller: 24V field power, 5V logic, and isolated 3.3V FPGA core. IC Role / Device Role / Timing Role: Dual ADJ inputs monitor 24V and 5V rails; VCC UVLO supervises 3.3V FPGA supply; RST holds processor in reset until all rails stabilize. Use Value: Eliminates need for three discrete supervisors; SEL pin configures ADJ1 for 24V OV and ADJ2 for 5V UV - single IC covers mixed fault types. |
| Network Equipment DC-DC Monitoring | Medical Imaging Power Subsystem |
Use Scenario: Supervises redundant 48V telecom supplies feeding intermediate bus converters in 5G base station power shelf. IC Role / Device Role / Timing Role: ADJ1 monitors primary 48V rail for –10% UV; ADJ2 monitors secondary 12V for +10% OV; VCC UVLO checks 3.3V management controller supply. Use Value: Open-drain outputs allow wired-OR of multiple LTC2919 units for N+1 redundancy; REF output enables precise –48V biasing without extra op-amp. |
Use Scenario: Validates clean power delivery to FPGA and ADC subsystems in portable ultrasound device, where battery voltage sag must not trigger spurious resets. IC Role / Device Role / Timing Role: ADJ1 tracks 1.2V FPGA core (UV only); ADJ2 tracks 2.5V ADC reference (OV only); VCC UVLO guards 3.3V system controller. Use Value: 50µA quiescent current extends battery life; ±1.5% threshold accuracy ensures reliable operation across medical-grade temperature range. |
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 UVLO with 200ms timeout; no adjustable inputs or polarity selection; 1.6µA IQ; SOT-23-6 | Only monitors VCC - cannot replace dual-adjustable function or negative supply support of LTC2919HDDB-3.3#TRMPBF | Select when only basic 3.3V supply supervision is required and board space is constrained. |
| MAX6816EUT+T | Dual 0.5V adjustable inputs, but no VCC UVLO; ±2% threshold accuracy; 10µA IQ; SOT-23-6 | Lacks third supply monitor and automotive temp grade - unsuitable for AEC-Q100 designs or triple-rail systems | Choose for cost-sensitive industrial applications where ±2% accuracy and no VCC monitoring are acceptable. |
Compared with TPS3808G33DBVR and MAX6816EUT+T, the LTC2919HDDB-3.3#TRMPBF uniquely delivers triple-input supervision, polarity configurability, AEC-Q100 qualification, and guaranteed low-voltage output drive - making it the only option for automotive and high-reliability dual-rail + VCC monitoring.
Availability
LTC2919HDDB-3.3#TRMPBF is available at Aetrix Electronics and suitable for automotive ECU power sequencing, industrial PLC safety interlocks, and medical imaging subsystem supervision requiring stable component supply across extended temperature ranges.
Supply support for LTC2919HDDB-3.3#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2919 product line delivers precision, low-power, multi-rail power supervision ICs designed for mission-critical applications demanding guaranteed accuracy, glitch immunity, and extended temperature operation - especially in automotive and industrial control.
FAQ
What is the exact VCC UVLO threshold range for LTC2919HDDB-3.3#TRMPBF?
The LTC2919HDDB-3.3#TRMPBF has a specified VCC UVLO threshold range of 2.871V to 2.970V at –40°C to +125°C, corresponding to –10% ±0.5% of 3.3V nominal. This is factory-trimmed and guaranteed across the full operating temperature range, eliminating need for external calibration in 3.3V supply monitoring applications.
Can LTC2919HDDB-3.3#TRMPBF monitor negative voltages, and how is that implemented?
Yes, the LTC2919HDDB-3.3#TRMPBF can monitor negative voltages using its buffered 1V REF output as an offset. When SEL = GND, both ADJ inputs operate in negative polarity mode: a negative supply is connected via resistor divider to ADJx, with the other end tied to REF (not GND), enabling precise –UV detection (e.g., –4.3V on a –5V rail).
How does the TMR pin configure reset timeout behavior on LTC2919HDDB-3.3#TRMPBF?
The TMR pin on LTC2919HDDB-3.3#TRMPBF selects timeout mode: tied to GND enables the internal 200ms timer; left open yields ~400µs minimum; tied to VCC disables timeout (comparator mode); and a capacitor to GND sets 9ms/nF (e.g., 22nF = 200ms). This eliminates external timing components in most configurations.
Is LTC2919HDDB-3.3#TRMPBF pin-compatible with other variants in the LTC2919 family?
Yes, all LTC2919 DFN-packaged variants - including LTC2919CDDB-3.3#TRMPBF, LTC2919IDDB-3.3#TRMPBF, and LTC2919HDDB-3.3#TRMPBF - share identical 10-lead DDB pinout, footprint, and electrical interface. Only temperature grade and marking differ; no PCB changes are required when upgrading from C/I to H grade.
What is the maximum sink current capability of RST, OUT1, and OUT2 on LTC2919HDDB-3.3#TRMPBF?
The RST, OUT1, and OUT2 pins on LTC2919HDDB-3.3#TRMPBF guarantee VOL ≤ 0.15V at 2.5mA sink current when VCC ≥ 3V. At lower VCC (e.g., 0.5V), they still guarantee logic-low output (≤0.30V at 5µA), enabling robust reset assertion during deep brownout conditions.
LTC2919HDDB-3.3#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:
- 2.921V, Adj, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LTC2919HDDB-3.3#TRMPBF FAQ
1.How can I place an order for LTC2919HDDB-3.3#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2919HDDB-3.3#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 LTC2919HDDB-3.3#TRMPBF reliable?
The price and inventory of LTC2919HDDB-3.3#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2919HDDB-3.3#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2919HDDB-3.3#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2919HDDB-3.3#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2919HDDB-3.3#TRMPBF?
LTC2919HDDB-3.3#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2919HDDB-3.3#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 LTC2919HDDB-3.3#TRMPBF?
For technical support, including LTC2919HDDB-3.3#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2919HDDB-3.3#TRMPBF requirements.
6.How does Aetrix verify that LTC2919HDDB-3.3#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2919HDDB-3.3#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 LTC2919HDDB-3.3#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2919HDDB-3.3#TRMPBF?
All LTC2919HDDB-3.3#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2919HDDB-3.3#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 LTC2919HDDB-3.3#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2919HDDB-3.3#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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