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Analog Devices Inc. LTC2919HDDB-5#TRPBF
- Part No.:
- LTC2919HDDB-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2919HDDB-5#TRPBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,521
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Product details
Overview
LTC2919HDDB-5#TRPBF from Analog Devices is a precision triple-input voltage supervisor IC with two adjustable 0.5V-threshold inputs and a fixed -10% VCC UVLO monitor for 5V supplies. It features ±1.5% threshold accuracy over –40°C to 125°C, open-drain RST/OUT1/OUT2 outputs, and pin-selectable polarity for UV/OV monitoring of positive or negative rails. Used in automotive power sequencing and industrial control systems requiring high-temperature reliability.
For engineers reviewing the LTC2919HDDB-5#TRPBF datasheet, LTC2919HDDB-5#TRPBF pinout, LTC2919HDDB-5#TRPBF application, or LTC2919HDDB-5#TRPBF equivalent, this page delivers verified specifications, thermal-grade package mapping, polarity-selectable input configuration, reset timeout options (internal 200ms or external capacitor), and automotive-qualified alternatives - all confirmed for the HDDB-5 variant.
Technical Context
The LTC2919HDDB-5#TRPBF implements dual independent comparators with 0.5V nominal thresholds and a third comparator monitoring VCC at 4.50V (–10% of 5V) with ±1.5% accuracy across –40°C to 125°C. Its three-state SEL pin configures ADJ1/ADJ2 polarity without external components, enabling simultaneous UV/OV detection on mixed-sign rails.
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 or externally set). Glitch filtering via propagation delay vs. overdrive and TMR pin-controlled timing ensures immunity to sub-100µs transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 4.50V (–10% of 5V nominal), ±1.5% accuracy over –40°C to 125°C - enables precise 5V supply brownout detection |
| ADJ Input Threshold | 492.5mV to 507.5mV (±1.5% of 500mV), guaranteed over full temperature range - supports accurate low-voltage rail monitoring |
| Quiescent Current | 50µA typical, ≤280µA max at –40°C to 125°C - enables micropower operation in always-on automotive modules |
| Reset Timeout | 200ms internal (TMR = GND), or 15–27ms with 2.2nF external capacitor - configurable response time for system boot sequencing |
| Operating Temperature | –40°C to +125°C junction - AEC-Q100 qualified for under-hood automotive applications |
| Output Type | Open-drain RST, OUT1, OUT2 - allows level-shifting, wired-OR logic, and pull-up to any voltage ≤7.5V |
| Reference Output | 1.000V buffered REF, ±10mV accuracy, ±1mA drive - provides stable offset for negative-rail monitoring circuits |
Pinout & Package
Package: 10-lead 3mm × 2mm plastic DFN (DDB) with exposed pad; rated for –40°C to +125°C operation and AEC-Q100 qualification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SEL (Pin 1) | Three-state polarity select | Configures ADJ1/ADJ2 as (+)UV/(–)OV, (+)UV/(+)UV, or (–)UV/(–)OV - no external components required |
| VCC (Pin 2) | Power supply input | Accepts 0.5V–6V directly; includes 6.5V shunt regulator for >6V operation - enables high-voltage battery monitoring |
| OUT1 (Pin 3) | Adjustable input 1 status | Asserts low when ADJ1 is invalid per SEL-configured polarity - drives external reset logic or fault indicators |
| OUT2 (Pin 4) | Adjustable input 2 status | Asserts low when ADJ2 is invalid per SEL-configured polarity - enables independent rail fault isolation |
| RST (Pin 5) | Combined reset output | Asserts low if *any* monitored input fails or VCC drops below UVLO - requires external pull-up for system reset assertion |
| GND (Pin 6) | Ground reference | Primary return path for all analog and digital circuitry - exposed pad may be tied to GND for improved thermal performance |
| REF (Pin 7) | Buffered 1V reference | Sources/sinks ±1mA; drives capacitive loads ≤1000pF - used to bias negative-rail divider networks |
| TMR (Pin 8) | Reset timeout control | GND = 200ms internal timeout; open = ~400µs min; VCC = comparator mode (no timeout) - selects reset behavior per system needs |
| ADJ2 (Pin 9) | Adjustable input 2 | 0.5V threshold comparator input; polarity set by SEL - monitors second supply rail (positive or negative) |
| ADJ1 (Pin 10) | Adjustable input 1 | 0.5V threshold comparator input; polarity set by SEL - monitors primary supply rail with programmable fault condition |
Key Features
| Feature | Design Value |
|---|---|
| Polarity-selectable inputs | SEL pin configures ADJ1/ADJ2 for (+)UV, (+)OV, (–)UV or (–)OV detection without resistors or jumpers |
| Triple independent monitoring | Simultaneous supervision of two adjustable rails + fixed 5V VCC UVLO - eliminates need for multiple discrete supervisors |
| Automotive-grade thermal range | –40°C to +125°C operation with AEC-Q100 qualification - suitable for engine control units and ADAS power domains |
| Glitch-immune timing | Propagation delay filtering (50–800µs) + configurable reset timeout prevent false resets from load transients or EMI |
| Low-voltage output drive | RST/OUT1/OUT2 guaranteed low down to VCC = 0.5V - ensures deterministic reset during deep brownout conditions |
| Integrated 6.5V shunt regulator | Enables direct connection to 12V/24V automotive batteries with series resistor - simplifies high-voltage interface design |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Sequencing |
|---|---|
Use Scenario: Monitoring 5V microcontroller core supply and 12V sensor bias rail in under-hood ECU modules. IC Role / Device Role / Timing Role: LTC2919HDDB-5#TRPBF acts as triple-supply supervisor with VCC UVLO for 5V logic, ADJ1 for 12V sensor rail (configured as OV monitor), and ADJ2 for –5V CAN transceiver supply (configured as UV monitor). Use Value: Ensures MCU reset only after all rails stabilize within spec, preventing firmware corruption during cold cranking or load dump events. |
Use Scenario: Coordinating startup of 3.3V FPGA, 5V I/O bank, and 24V fieldbus interface in modular PLC backplane. IC Role / Device Role / Timing Role: LTC2919HDDB-5#TRPBF supervises 5V domain (VCC UVLO), 3.3V rail (ADJ1 with resistor divider), and 24V bus (ADJ2 with scaled divider), with 200ms internal timeout ensuring clean power-up sequence. Use Value: Eliminates need for three separate supervisors, reducing BOM count and PCB area while guaranteeing synchronized reset release. |
| Server Board Voltage Margining | Medical Imaging Power Management |
Use Scenario: Validating 5V supply tolerance during production test by injecting controlled undervoltage/overvoltage faults. IC Role / Device Role / Timing Role: LTC2919HDDB-5#TRPBF configured in comparator mode (TMR = VCC) provides immediate, glitch-free fault indication on OUT1/OUT2 without timeout delay. Use Value: Enables real-time pass/fail assessment of PSU regulation margins with ±1.5% threshold accuracy - critical for high-reliability server qualification. |
Use Scenario: Supervising isolated ±15V analog front-end supplies and 5V digital controller in MRI signal chain modules. IC Role / Device Role / Timing Role: LTC2919HDDB-5#TRPBF uses REF output to bias ADJ1/ADJ2 dividers for precise –15V UV and +15V OV detection, with RST asserting only when both analog rails are valid. Use Value: Prevents image artifacts by ensuring analog signal conditioning circuitry powers up fully before digital acquisition begins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US31D3+T | Single 3.08V fixed UVLO; no adjustable inputs or polarity selection; 1.6µA quiescent current | Only monitors VCC - cannot replace dual-rail supervision or negative rail support | Select only when supervising one 3.3V rail with ultra-low power priority and no mixed-polarity requirements |
| TPS3808G33DBVR | Single 3.3V UVLO with manual reset input; 16µA quiescent current; no OV or negative rail capability | Lacks dual inputs, polarity control, and REF output - unsuitable for multi-rail or automotive use | Choose only for cost-sensitive, single-rail consumer applications where AEC-Q100 and extended temperature are not required |
Compared with MAX6326US31D3+T and TPS3808G33DBVR, the LTC2919HDDB-5#TRPBF uniquely supports triple-input monitoring, pin-selectable polarity for UV/OV on positive/negative rails, and AEC-Q100 qualification - making it the only viable option for automotive or industrial multi-supply systems requiring guaranteed –40°C to 125°C operation.
Availability
LTC2919HDDB-5#TRPBF is available at Aetrix Electronics and suitable for automotive engine control, industrial PLC power sequencing, medical imaging subsystems, and telecom infrastructure requiring stable component supply across extended temperature ranges.
Supply support for LTC2919HDDB-5#TRPBF 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, multi-rail voltage supervision with configurable polarity and automotive-grade reliability - designed specifically for safety-critical power monitoring in harsh environments.
FAQ
What is the exact VCC UVLO threshold for LTC2919HDDB-5#TRPBF?
The LTC2919HDDB-5#TRPBF has a fixed VCC UVLO threshold of 4.50V (–10% of 5V nominal), with guaranteed accuracy of ±1.5% over the full –40°C to +125°C operating range. This value is specified in the Electrical Characteristics table under VCC(UVLO) for the "-5" variant and applies regardless of SEL or TMR configuration.
How does the SEL pin configure polarity for ADJ1 and ADJ2 on LTC2919HDDB-5#TRPBF?
On the LTC2919HDDB-5#TRPBF, the SEL pin sets ADJ1/ADJ2 polarity as follows: SEL = VCC → both inputs positive polarity (UV detection); SEL = GND → both inputs negative polarity (UV detection); SEL = open → ADJ1 positive, ADJ2 negative. This enables combinations like +5V UV and –12V UV monitoring without external logic.
Can LTC2919HDDB-5#TRPBF monitor a 24V automotive battery directly?
Yes - the LTC2919HDDB-5#TRPBF includes an internal 6.5V shunt regulator on VCC. To monitor 24V, connect VCC through a current-limiting resistor (e.g., 10kΩ for ~1.7mA) sized per the formula in the datasheet. The part then regulates VCC to ~6.5V while drawing only 50µA quiescent current.
What is the minimum VCC voltage required for LTC2919HDDB-5#TRPBF to assert valid low on RST?
The LTC2919HDDB-5#TRPBF guarantees RST output low voltage ≤0.15V when VCC ≥ 0.5V, as specified in the VOL parameter. This ensures reliable reset assertion even during deep brownout conditions common in automotive stop-start systems.
Does LTC2919HDDB-5#TRPBF support hysteresis on its adjustable inputs?
No - the LTC2919HDDB-5#TRPBF does not include internal hysteresis on ADJ1/ADJ2 inputs outside comparator mode (TMR = VCC). Hysteresis must be added externally via RC networks or resistor feedback if needed; the datasheet explicitly states hysteresis is absent except in comparator mode.
LTC2919HDDB-5#TRPBF 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LTC2919HDDB-5#TRPBF FAQ
1.How can I place an order for LTC2919HDDB-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2919HDDB-5#TRPBF 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-5#TRPBF reliable?
The price and inventory of LTC2919HDDB-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2919HDDB-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2919HDDB-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2919HDDB-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2919HDDB-5#TRPBF?
LTC2919HDDB-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2919HDDB-5#TRPBF 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-5#TRPBF?
For technical support, including LTC2919HDDB-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2919HDDB-5#TRPBF requirements.
6.How does Aetrix verify that LTC2919HDDB-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2919HDDB-5#TRPBF 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-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2919HDDB-5#TRPBF?
All LTC2919HDDB-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2919HDDB-5#TRPBF, 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-5#TRPBF part is unused and in its original packaging.
Return procedure for LTC2919HDDB-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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