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Analog Devices Inc. LTC2919IDDB-5#TRPBF
- Part No.:
- LTC2919IDDB-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2919IDDB-5#TRPBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,812
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Product details
Overview
LTC2919IDDB-5#TRPBF from Analog Devices is a precision triple-input voltage supervisor IC for system power monitoring, featuring two adjustable 0.5V-threshold inputs (±1.5% accuracy over –40°C to +85°C), a fixed –10% VCC UVLO for 5V supplies (4.35V threshold), open-drain RST/OUT1/OUT2 outputs, and pin-selectable polarity for UV/OV detection on positive or negative rails.
For engineers reviewing the LTC2919IDDB-5#TRPBF datasheet, LTC2919IDDB-5#TRPBF pinout, LTC2919IDDB-5#TRPBF application, or LTC2919IDDB-5#TRPBF equivalent, this device supports automotive-grade supply monitoring with internal 200ms reset timeout, buffered 1V reference, 50µA quiescent current, and DFN-10 (3mm × 2mm) packaging - critical for space-constrained embedded power integrity designs.
Technical Context
The LTC2919IDDB-5#TRPBF implements dual independent comparators with user-configurable input polarity via the three-state SEL pin (VCC/GND/open), enabling simultaneous UV/OV detection across mixed-polarity rails. Its third monitoring channel uses an accurate VCC UVLO threshold of 4.35V (–10% of 5V) with 0.3–2.0% hysteresis.
Reset assertion is synchronized across all monitored inputs: RST remains low until both ADJ inputs and VCC are valid for the full timeout period (200ms internal, externally programmable, or disabled). Glitch filtering via propagation delay vs. overdrive and TMR pin-controlled timing ensures immunity to sub-15ms transients without sacrificing DC accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 4.35V (–10% of 5V nominal); guarantees reliable brownout detection for 5V systems across –40°C to +85°C |
| ADJ Input Threshold Accuracy | ±1.5% over full temperature range; enables precise 5% tolerance margin setting for 5V rail monitoring |
| Quiescent Current | 50µA typical at 5V; supports always-on monitoring in battery-backed or low-power automotive modules |
| Reset Timeout Options | Internal 200ms (TMR = GND), external capacitor (9ms/nF), or disabled (TMR = VCC); eliminates need for external RC timing components in most cases |
| Output Type | Open-drain RST/OUT1/OUT2; allows level-shifting, wired-OR logic, and pull-up to any voltage ≤7.5V independent of VCC |
| Reference Output | Buffered 1.000V ±10mV (0.99–1.01V); provides stable offset for negative-rail monitoring without external op-amp |
| Operating Temperature | –40°C to +85°C (I-grade); qualified for under-hood automotive and industrial control applications |
| Package | 10-lead 3mm × 2mm DFN with exposed pad; thermal resistance θJA = 76°C/W supports high-density PCB layouts |
Pinout & Package
Package: 10-lead plastic DFN (3mm × 2mm), exposed pad (Pin 11), RoHS-compliant, moisture sensitivity level 1. Exposed pad may be left unconnected or tied to GND for improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SEL (Pin 1) | Polarity select input | Three-state logic: VCC = both ADJ inputs positive polarity; GND = both negative polarity; open = ADJ1 positive / ADJ2 negative |
| VCC (Pin 2) | Power supply input | Operates from 0.5V–6V directly; includes 6.5V shunt regulator for >6V supplies; enables VCC UVLO monitoring at 4.35V |
| OUT1 (Pin 3) | Adjustable input 1 status output | Open-drain; asserts low when ADJ1 violates configured UV/OV condition; requires external pull-up |
| OUT2 (Pin 4) | Adjustable input 2 status output | Open-drain; asserts low when ADJ2 violates configured UV/OV condition; independent of OUT1 |
| RST (Pin 5) | Master reset output | Open-drain; asserts low if any monitored input (ADJ1, ADJ2, or VCC) fails; held low for full timeout after recovery |
| GND (Pin 6) | Ground reference | Primary return path for internal circuitry and REF output; must be low-impedance connection |
| REF (Pin 7) | Buffered reference output | 1.000V ±10mV; sources/sinks up to 1mA; drives capacitive loads ≤1000pF; used for negative-rail offset |
| 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 nominal threshold comparator input; polarity set by SEL; tie to GND if unused (SEL = GND/open) |
| ADJ1 (Pin 10) | Adjustable input 1 | 0.5V nominal threshold comparator input; polarity set by SEL; tie to REF if unused (SEL = VCC/open) |
Key Features
| Feature | Design Value |
|---|---|
| Polarity-selectable dual adjustable inputs | Single SEL pin configures three distinct UV/OV monitoring combinations across positive/negative rails without external logic |
| Accurate 5V supply monitoring | VCC UVLO threshold fixed at 4.35V (–10%) with ±0.3% hysteresis ensures deterministic reset during 5V brownout |
| Glitch-immune timing architecture | Propagation delay vs. overdrive filtering + programmable timeout prevents false resets from <15ms supply transients |
| Low-voltage output drive | RST/OUT1/OUT2 guaranteed low at VCC ≥ 0.5V (VOL ≤ 0.15V @ 2.5mA sink); prevents floating states during power-up/down |
| Integrated 1V reference buffer | Eliminates need for external precision reference in negative-rail monitoring (e.g., –5V UV detection using REF offset) |
| Space-optimized DFN packaging | 3mm × 2mm footprint with thermal pad reduces board area by >40% vs. MSOP-10 while improving thermal dissipation |
Applications
| Automotive Body Control Module | Industrial PLC Power Sequencing |
|---|---|
|
Use Scenario: Monitoring 5V microcontroller supply and –12V sensor bias rail in under-hood ECUs subject to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Triple-input supervisor asserting RST during VCC brownout (<4.35V) or negative rail overvoltage (>–11.4V), with 200ms timeout ensuring clean MCU restart after transient recovery. Use Value: Prevents erratic MCU operation during ISO 16750-2 pulse 4a/b events by guaranteeing reset hold time exceeds worst-case supply recovery duration. |
Use Scenario: Coordinating power-up sequence of FPGA I/O bank (3.3V) and analog front-end (±15V) in modular automation controllers. IC Role / Device Role / Timing Role: Dual ADJ inputs monitor 3.3V (positive UV) and –15V (negative OV) simultaneously; SEL = open configures ADJ1+ / ADJ2–; RST released only after both rails stabilize. Use Value: Eliminates need for discrete comparators and timing RC networks, reducing BOM count by 7 components per monitored rail pair. |
| Server CPU Core Voltage Monitor | Medical Imaging Power Integrity |
|
Use Scenario: Detecting undervoltage on 5V auxiliary supply and overvoltage on 12V fan controller rail in rack-mounted servers. IC Role / Device Role / Timing Role: ADJ1 monitors 5V UV (via resistor divider to 0.5V), ADJ2 monitors 12V OV (negative polarity); RST triggers system shutdown before thermal runaway. Use Value: ±1.5% threshold accuracy ensures detection occurs precisely at 4.425V (5V–10%–1.5%), avoiding nuisance resets within PSU tolerance band. |
Use Scenario: Ensuring stable ±15V analog supply for CT detector ASICs where rail collapse could corrupt image data. IC Role / Device Role / Timing Role: REF pin offsets ADJ2 to monitor –15V UV (–14.25V trip); ADJ1 monitors +15V OV (15.75V trip); dual-fault detection prevents partial power-up. Use Value: Buffered 1V reference enables direct negative-rail monitoring without external op-amp, maintaining <10ppm/°C drift over medical operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Single 3.3V fixed UVLO; no adjustable inputs; no negative rail support; 35µA IQ | Only monitors one rail; cannot replace dual-rail or negative monitoring function of LTC2919IDDB-5#TRPBF | Choose only for simple 3.3V-only systems requiring lowest quiescent current and minimal footprint |
| MAX6326LT31D3+T | Dual 3.1V/3.3V fixed thresholds; no polarity selection; no REF output; 12µA IQ | Lacks configurable UV/OV per rail and buffered reference; limited to positive-rail monitoring only | Select when monitoring two fixed positive supplies with tight IQ budget and no negative rail requirements |
Compared with TPS3808G33DBVR and MAX6326LT31D3+T, the LTC2919IDDB-5#TRPBF uniquely supports mixed-polarity rail monitoring, precise 5V UVLO, and integrated 1V reference - making it irreplaceable for automotive and industrial systems requiring coordinated multi-rail fault detection.
Availability
LTC2919IDDB-5#TRPBF is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLCs, server power sequencing, and medical imaging equipment requiring stable component supply with AEC-Q100 qualification and extended temperature support.
Supply support for LTC2919IDDB-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, low-power, multi-rail voltage supervision for mission-critical power integrity in harsh environments - designed specifically for automotive and industrial applications demanding AEC-Q100 compliance and wide-temperature operation.
FAQ
What is the exact VCC UVLO threshold for LTC2919IDDB-5#TRPBF?
The LTC2919IDDB-5#TRPBF has a guaranteed VCC UVLO threshold of 4.35V (–10% of 5V nominal) with ±0.3% hysteresis over –40°C to +85°C. This value is factory-trimmed and specified in the Electrical Characteristics table under VCC(UVLO) for the "-5" variant. It enables deterministic brownout detection for 5V systems without external resistor dividers.
Can LTC2919IDDB-5#TRPBF monitor negative voltages, and how is polarity selected?
Yes, LTC2919IDDB-5#TRPBF can monitor negative voltages using its ADJ1 and ADJ2 inputs with polarity controlled by the SEL pin. When SEL = GND, both inputs operate in negative polarity mode (detecting –UV or +OV); when SEL = open, ADJ1 is positive and ADJ2 is negative. The buffered 1V REF output provides the required offset for negative-rail sensing circuits.
What reset timeout options does LTC2919IDDB-5#TRPBF support, and how are they configured?
LTC2919IDDB-5#TRPBF supports three reset timeout modes via the TMR pin: internal 200ms (TMR tied to GND), external capacitor (9ms/nF, e.g., 22nF = 200ms), or disabled/comparator mode (TMR tied to VCC). The internal timer eliminates external components for standard applications, while capacitor programming allows precise adjustment across 15ms–9s range.
Is LTC2919IDDB-5#TRPBF qualified for automotive applications?
Yes, LTC2919IDDB-5#TRPBF is AEC-Q100 qualified for automotive applications (Grade I: –40°C to +85°C). It meets stress testing requirements for temperature cycling, humidity, and mechanical shock, and is manufactured under controlled processes supporting automotive reliability standards. The "I" suffix in the part number explicitly denotes this qualification.
What is the maximum sink current capability of the RST, OUT1, and OUT2 pins on LTC2919IDDB-5#TRPBF?
The RST, OUT1, and OUT2 pins on LTC2919IDDB-5#TRPBF are open-drain outputs rated for 2.5mA sink current at VOL ≤ 0.15V with VCC ≥ 3V. At lower VCC (e.g., 0.5V), they guarantee VOL ≤ 0.30V with 5µA sink. These specifications ensure robust interfacing with 3.3V/5V logic families and allow pull-up to voltages up to 7.5V.
LTC2919IDDB-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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LTC2919IDDB-5#TRPBF FAQ
1.How can I place an order for LTC2919IDDB-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2919IDDB-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 LTC2919IDDB-5#TRPBF reliable?
The price and inventory of LTC2919IDDB-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 LTC2919IDDB-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2919IDDB-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2919IDDB-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2919IDDB-5#TRPBF?
LTC2919IDDB-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2919IDDB-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 LTC2919IDDB-5#TRPBF?
For technical support, including LTC2919IDDB-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2919IDDB-5#TRPBF requirements.
6.How does Aetrix verify that LTC2919IDDB-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2919IDDB-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 LTC2919IDDB-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2919IDDB-5#TRPBF?
All LTC2919IDDB-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2919IDDB-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 LTC2919IDDB-5#TRPBF part is unused and in its original packaging.
Return procedure for LTC2919IDDB-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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