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Analog Devices Inc. LTC2919IDDB-3.3#TRMPBF
- Part No.:
- LTC2919IDDB-3.3#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2919IDDB-3.3#TRMPBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,480
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Product details
Overview
LTC2919IDDB-3.3#TRMPBF from Analog Devices is a triple-input precision voltage monitor IC for system-level power supervision, featuring two adjustable 0.5V-threshold inputs (±1.5% accuracy over –40°C to +85°C), a fixed 3.3V supply UVLO input, open-drain RST/OUT1/OUT2 outputs, and pin-selectable polarity for UV/OV monitoring of positive or negative rails. It supports automotive-grade operation and enables compact, low-power supply fault detection in multi-rail systems.
For engineers reviewing the LTC2919IDDB-3.3#TRMPBF datasheet, LTC2919IDDB-3.3#TRMPBF pinout, LTC2919IDDB-3.3#TRMPBF application, or LTC2919IDDB-3.3#TRMPBF equivalent, key selection criteria include its ±1.5% threshold accuracy across temperature, 200ms internal reset timeout, 50µA quiescent current, 10-lead DFN (3mm × 2mm) package, and support for dual-polarity monitoring via the three-state SEL pin.
Technical Context
The LTC2919IDDB-3.3#TRMPBF implements dual independent comparators with 0.5V nominal thresholds and a third comparator monitoring VCC against a –10% UVLO threshold calibrated for 3.3V supplies (2.871V to 2.970V). Its architecture includes glitch filtering on ADJ inputs and propagation delay scaling with overdrive to reject transients.
Reset behavior is governed by a configurable timeout: internally fixed at 200ms (TMR = GND), externally programmable via capacitor (9ms/nF), or disabled (TMR = VCC) for comparator-mode direct output routing. The three-state SEL pin selects polarity combinations-positive/positive, positive/negative, or negative/negative-for ADJ1 and ADJ2 without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 2.871V to 2.970V (–10% of 3.3V, guaranteed over –40°C to +85°C) |
| ADJ Input Threshold | 492.5mV to 507.5mV (0.5V ±1.5%, applies to both ADJ1 and ADJ2) |
| Quiescent Current | 50µA typical (enables micropower operation in always-on supervision) |
| Reset Timeout Options | Internal 200ms (TMR = GND), external capacitor (9ms/nF), or disabled (TMR = VCC) |
| Output Type | Open-drain RST, OUT1, OUT2 (support pull-up to VCC or higher voltage rail) |
| Operating Temperature | –40°C to +85°C (I-grade, AEC-Q100 qualified for automotive use) |
| Package | 10-lead 3mm × 2mm plastic DFN with exposed pad (DDB) |
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 input | Determines ADJ1/ADJ2 polarity combination: VCC = (+,+), OPEN = (+,–), GND = (–,–); leakage ≤ ±5µA when open |
| VCC (Pin 2) | Power supply input | Operates from 0.5V to 6V directly; includes 6.5V shunt regulator for >6V supplies; enables VCC UVLO monitoring |
| 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; requires external pull-up |
| RST (Pin 5) | Open-drain inverted reset output | Asserts low if any monitored input (ADJ1, ADJ2, or VCC) is invalid; held low for timeout period after recovery |
| GND (Pin 6) | Ground reference | Primary ground connection; exposed pad (Pin 11) may be connected here for thermal improvement |
| REF (Pin 7) | Buffered 1V reference output | Sources/sinks up to 1mA; used as offset 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 sets timeout |
| ADJ2 (Pin 9) | Adjustable input 2 | 0.5V threshold comparator input; polarity set by SEL; tie to GND if unused (SEL = GND or OPEN) |
| ADJ1 (Pin 10) | Adjustable input 1 | 0.5V threshold comparator input; polarity set by SEL; tie to REF if unused (SEL = VCC or OPEN) |
Key Features
| Feature | Design Value |
|---|---|
| Precision threshold accuracy | ±1.5% over full operating temperature range (–40°C to +85°C), enabling reliable fault detection without nuisance resets |
| Configurable polarity selection | Three-state SEL pin enables UV/OV monitoring of positive, negative, or mixed rails without external logic or resistors |
| Low-power operation | 50µA typical quiescent current allows continuous supervision in battery-backed or energy-constrained systems |
| Glitch-immune timing architecture | Propagation delay scaling with overdrive + programmable reset timeout suppress false triggers from load transients and noise |
| Flexible reset timeout | Internal 200ms timer, external capacitor (9ms/nF), or disabled mode provides design flexibility for system boot timing requirements |
Applications
| Core Voltage Monitoring | I/O Supply Supervision |
|---|---|
Use Scenario: Monitoring 1.2V core rail in an FPGA or microprocessor subsystem during power-up, brownout, and shutdown sequences. IC Role / Device Role / Timing Role: LTC2919IDDB-3.3#TRMPBF acts as primary supervisor, asserting RST until both ADJ1 (core rail) and VCC (3.3V I/O rail) are valid for ≥200ms. Use Value: Prevents processor lockup by ensuring stable core voltage before release of reset, leveraging ±1.5% threshold accuracy and glitch filtering. | Use Scenario: Supervising 3.3V and 1.8V I/O supplies in industrial PLC modules where rail sequencing and fault isolation are critical. IC Role / Device Role / Timing Role: LTC2919IDDB-3.3#TRMPBF monitors both rails using ADJ1 and ADJ2 with SEL = VCC (positive polarity), generating independent OUT1/OUT2 flags and combined RST. Use Value: Enables early fault detection and diagnostics via separate outputs while maintaining system reset integrity through the common RST signal. |
| Automotive Infotainment Power | Negative Rail Monitoring |
Use Scenario: Validating 3.3V and 5V supplies in automotive head-unit ECUs subject to cold-crank and load-dump conditions. IC Role / Device Role / Timing Role: LTC2919IDDB-3.3#TRMPBF uses VCC UVLO for 3.3V rail and ADJ1 for 5V rail (via resistor divider), with TMR = GND for 200ms timeout compliant with automotive startup timing. Use Value: AEC-Q100 qualification and –40°C to +85°C operation ensure reliability in under-hood environments; low ICC reduces standby power draw. | Use Scenario: Detecting undervoltage on –12V analog front-end supply in test equipment, where failure must trigger immediate shutdown. IC Role / Device Role / Timing Role: LTC2919IDDB-3.3#TRMPBF configures ADJ1 for negative polarity (SEL = GND), referencing REF (1V) to set –12V UV threshold at –11.4V. Use Value: Eliminates need for level-shifting op-amps; buffered REF provides stable offset, and ±1.5% accuracy ensures precise fault threshold despite temperature drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Single 3.3V UVLO monitor with 200ms fixed timeout; no adjustable inputs or polarity selection | Only monitors VCC rail; lacks dual-adjustable capability and negative rail support | Select when only basic 3.3V supply supervision is needed and board space is constrained |
| MAX6326LT33D3+T | 3.3V UVLO supervisor with watchdog timer; no adjustable inputs, no REF output, no polarity control | Provides watchdog functionality but cannot monitor auxiliary rails or negative voltages | Choose when system-level reset coordination and watchdog timeout are required alongside basic UVLO |
Compared with TPS3808G33DBVR and MAX6326LT33D3+T, the LTC2919IDDB-3.3#TRMPBF offers unique dual adjustable inputs, pin-selectable polarity, buffered 1V reference, and triple-monitor capability-making it suitable for complex multi-rail systems where flexibility and precision outweigh simplicity.
Availability
LTC2919IDDB-3.3#TRMPBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLCs, and FPGA-based embedded controllers requiring stable component supply with AEC-Q100 qualification and extended temperature support.
Supply support for LTC2919IDDB-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 voltage supervision ICs designed for mission-critical power integrity in automotive, computing, and industrial systems where accuracy, reliability, and configurability are essential.
FAQ
What is the VCC UVLO threshold for LTC2919IDDB-3.3#TRMPBF?
The VCC UVLO threshold for LTC2919IDDB-3.3#TRMPBF is specified from 2.871V to 2.970V over the full operating temperature range (–40°C to +85°C), corresponding to –10% of 3.3V with ±0.5% tolerance. This threshold enables accurate monitoring of the 3.3V supply rail and triggers RST assertion when VCC drops below this window. The LTC2919IDDB-3.3#TRMPBF guarantees this specification across grade and temperature without derating.
How does the SEL pin configure polarity for ADJ1 and ADJ2 on LTC2919IDDB-3.3#TRMPBF?
The SEL pin on LTC2919IDDB-3.3#TRMPBF selects polarity combinations via three states: tied to VCC enables positive polarity on both ADJ1 and ADJ2 (for +UV/+OV), left open enables positive on ADJ1 and negative on ADJ2 (for +UV/–OV), and tied to GND enables negative polarity on both (for –UV/–OV). Each configuration determines whether the input voltage must exceed or fall below the 0.5V threshold to remain valid. The LTC2919IDDB-3.3#TRMPBF datasheet defines these mappings in Table 1 and supports them without external components.
Can LTC2919IDDB-3.3#TRMPBF monitor negative supply voltages?
Yes, LTC2919IDDB-3.3#TRMPBF can monitor negative supply voltages using its adjustable inputs configured for negative polarity (SEL = GND) and the buffered 1V REF output as an offset reference. For example, to monitor –12V UV, ADJ1 is biased via a resistor divider referenced to REF, setting the effective trip point at –11.4V (–10% of –12V). The LTC2919IDDB-3.3#TRMPBF's ±1.5% threshold accuracy and glitch rejection ensure robust operation even with noisy negative rails.
What are the reset timeout options available on LTC2919IDDB-3.3#TRMPBF?
LTC2919IDDB-3.3#TRMPBF offers three reset timeout modes: internal 200ms (TMR = GND), external capacitor-based (9ms/nF, e.g., 22nF yields ~200ms), or disabled (TMR = VCC) for direct comparator-mode output routing. The timeout governs how long RST remains asserted after all monitored inputs return to valid states. This flexibility allows the LTC2919IDDB-3.3#TRMPBF to meet diverse system boot timing requirements-from fast-response industrial controls to automotive-compliant 200ms delays.
Is LTC2919IDDB-3.3#TRMPBF qualified for automotive applications?
Yes, LTC2919IDDB-3.3#TRMPBF is AEC-Q100 qualified for automotive applications (Grade I, –40°C to +85°C) and manufactured under controlled processes meeting automotive reliability standards. It is explicitly designated for use in automotive systems such as infotainment, body control modules, and ADAS power domains. The LTC2919IDDB-3.3#TRMPBF datasheet confirms this qualification and references applicable Automotive Reliability reports available through Analog Devices representatives.
LTC2919IDDB-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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LTC2919IDDB-3.3#TRMPBF FAQ
1.How can I place an order for LTC2919IDDB-3.3#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2919IDDB-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 LTC2919IDDB-3.3#TRMPBF reliable?
The price and inventory of LTC2919IDDB-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 LTC2919IDDB-3.3#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2919IDDB-3.3#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2919IDDB-3.3#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2919IDDB-3.3#TRMPBF?
LTC2919IDDB-3.3#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2919IDDB-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 LTC2919IDDB-3.3#TRMPBF?
For technical support, including LTC2919IDDB-3.3#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2919IDDB-3.3#TRMPBF requirements.
6.How does Aetrix verify that LTC2919IDDB-3.3#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2919IDDB-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 LTC2919IDDB-3.3#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2919IDDB-3.3#TRMPBF?
All LTC2919IDDB-3.3#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2919IDDB-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 LTC2919IDDB-3.3#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2919IDDB-3.3#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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