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Analog Devices Inc. LTC2919IMS-5#PBF
- Part No.:
- LTC2919IMS-5#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2919IMS-5#PBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:428
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Product details
Overview
LTC2919IMS-5#PBF from Analog Devices is a precision triple-input supply monitor IC for UV/OV supervision of 2.5V, 3.3V, and 5V systems. It features two adjustable 0.5V-threshold inputs with ±1.5% accuracy over –40°C to +85°C, a third fixed VCC UVLO (4.35V nominal), open-drain RST/OUT1/OUT2 outputs, and pin-selectable polarity for negative-supply monitoring - used in core voltage supervision of industrial PLCs and automotive ECUs.
For engineers reviewing the LTC2919IMS-5#PBF datasheet, LTC2919IMS-5#PBF pinout, LTC2919IMS-5#PBF application, or LTC2919IMS-5#PBF equivalent, key selection criteria include guaranteed 0.5V ADJ threshold accuracy, 200ms internal reset timeout, buffered 1V reference for negative offset, 50µA quiescent current, and MSOP-10 package compatibility with space-constrained embedded power rails.
Technical Context
The LTC2919IMS-5#PBF integrates dual high-accuracy comparators (0.5V nominal threshold, ±1.5% over temperature) and a dedicated VCC UVLO circuit (4.35V for 5V operation). Its three-state SEL pin configures ADJ1/ADJ2 polarity (positive/negative UV/OV) without external components, enabling flexible fault detection across mixed-supply systems.
Reset behavior is governed by a configurable timeout: internal 200ms timer (TMR = GND), external capacitor (9ms/nF), or disabled (TMR = VCC). Glitch filtering on ADJ inputs and propagation delay (50–800µs) prevent false triggering from transient noise, while VCC shunt regulation (6.5V) supports operation up to 6V directly or higher with series resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 4.350V (nominal), ±0.075V tolerance - enables precise 5V supply undervoltage detection at –10% margin |
| ADJ Input Threshold | 495–505mV (±1.5%), tight over –40°C to +85°C - ensures reliable trip point for externally scaled supplies |
| Quiescent Current | 50µA max (I-Grade) - supports always-on monitoring in battery-backed or low-power industrial systems |
| Reset Timeout Options | Internal 200ms, external capacitor (e.g., 22nF → 200ms), or disabled - provides design flexibility for system boot timing |
| Reference Output | 1.000V ±10mV, ±1mA drive - supplies stable offset for negative-supply monitoring circuits |
| VCC Shunt Regulation | 6.5V typical - allows direct connection to 5V rails or safe operation from >6V supplies with current-limiting resistor |
| Output Type | Open-drain RST, OUT1, OUT2 - supports level-shifting, wired-OR logic, and pull-up to any voltage ≤7.5V |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm), exposed pad optional, rated for –40°C to +85°C (I-grade).
| 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 components needed |
| VCC (Pin 2) | Power supply input | Operates as direct 0.5–6V supply or 6.5V shunt-regulated input - supports high-voltage rails with series resistor |
| OUT1 (Pin 3) | Adjustable input 1 status output | Asserts low when ADJ1 is invalid (UV/OV per SEL setting) - open-drain, compatible with 3.3V/5V logic |
| OUT2 (Pin 4) | Adjustable input 2 status output | Asserts low when ADJ2 is invalid - independent of OUT1, enables dual-rail fault isolation |
| RST (Pin 5) | Master reset output | Asserts low if VCC < 4.35V OR ADJ1/ADJ2 invalid - held low for timeout after all inputs valid |
| GND (Pin 6) | Ground reference | Common return for VCC, REF, ADJ inputs, and outputs - must be low-impedance for accurate threshold sensing |
| REF (Pin 7) | Buffered 1V reference | Provides stable offset for negative-supply divider networks - drives up to 1mA, no bypass cap required |
| TMR (Pin 8) | Reset timeout control | GND = 200ms internal timeout; 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 (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 |
|---|---|
| Polarity-selectable dual inputs | SEL pin configures ADJ1/ADJ2 for positive UV/OV or negative UV/OV monitoring - eliminates need for external inverters or dual ICs |
| Triple independent monitoring | Two adjustable inputs + VCC UVLO (4.35V) - covers primary 5V rail and two auxiliary supplies (e.g., analog, I/O) in one device |
| Glitch-immune timing | 50–800µs propagation delay + programmable reset timeout - rejects sub-5kHz noise while preserving fast fault response |
| Low-voltage output drive | RST/OUT1/OUT2 guaranteed low down to VCC = 0.5V - prevents floating states during brownout or partial power-up |
| Space-efficient packaging | MSOP-10 (3mm × 3mm) footprint - fits dense PCB layouts in automotive ECU and industrial controller modules |
Applications
| Industrial PLC Power Supervision | Automotive Body Control Module |
|---|---|
|
Use Scenario: Monitors 5V main logic rail, 3.3V microcontroller core, and –5V analog sensor bias in programmable logic controllers. IC Role / Device Role / Timing Role: Triple-supply supervisor with independent OUT1/OUT2 flags and synchronized RST release after 200ms timeout. Use Value: Prevents spurious resets during line transients; ±1.5% threshold accuracy ensures compliance with IEC 61000-4-4 immunity requirements. |
Use Scenario: Supervises 5V infotainment SoC supply, 12V-to-5V DC/DC output, and –12V CAN transceiver bias in body control units. IC Role / Device Role / Timing Role: Configured with SEL = OPEN to monitor +5V (ADJ1) and –12V (ADJ2) simultaneously using REF offset. Use Value: Eliminates need for separate positive/negative supervisors; AEC-Q100 qualified I-grade operation ensures reliability at 85°C ambient. |
| Network Equipment Core Voltage Monitor | Medical Diagnostic Imaging PSU |
|
Use Scenario: Validates 5V backplane rail, 3.3V FPGA I/O bank, and 2.5V memory interface in 1U rack servers. IC Role / Device Role / Timing Role: Uses internal 200ms timeout to coordinate multi-rail power sequencing with downstream PMICs. Use Value: Open-drain outputs interface directly with 3.3V PMIC enable pins; 50µA ICC enables always-on health monitoring. |
Use Scenario: Supervises isolated 5V digital control rail, –15V high-voltage amplifier bias, and 24V motor driver supply in MRI subsystems. IC Role / Device Role / Timing Role: SEL = GND configures both ADJ inputs for negative UV detection (–15V, –24V) with REF-based scaling. Use Value: Buffered 1V reference enables precise –15V UV threshold (–14.25V) without op-amp circuitry - reduces BOM count and layout area. |
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 fixed UVLO only; no adjustable inputs, no negative monitoring, no REF output | Suitable only for basic 3.3V rail monitoring - cannot replace dual-adjustable or negative-supply functions of LTC2919IMS-5#PBF | Select when only 3.3V UV detection is required and board space permits separate devices for other rails |
| MAX6369KA29+T | Fixed 2.93V UVLO; no OV capability, no polarity selection, no buffered reference, SO-8 package | Limited to single-rail undervoltage detection; lacks triple-monitoring and negative-supply support | Choose for cost-sensitive, single-rail applications where ±1.5% accuracy and negative monitoring are unnecessary |
Compared with TPS3808G33DBVR and MAX6369KA29+T, the LTC2919IMS-5#PBF uniquely delivers triple-supply monitoring (two adjustable + VCC UVLO), pin-selectable polarity for negative rails, and a buffered 1V reference - enabling consolidated supervision of mixed-polarity systems in a single MSOP-10 package.
Availability
LTC2919IMS-5#PBF is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, network server power management, and medical imaging equipment requiring stable component supply with guaranteed –40°C to +85°C operation.
Supply support for LTC2919IMS-5#PBF 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 supply monitoring ICs designed for mission-critical power integrity in harsh environments - emphasizing threshold accuracy, glitch immunity, and flexible polarity configuration.
FAQ
What is the exact VCC UVLO threshold for LTC2919IMS-5#PBF?
The LTC2919IMS-5#PBF has a nominal VCC UVLO threshold of 4.350V, with a guaranteed range of 4.350V ±0.075V (±1.5%) over its full operating temperature range of –40°C to +85°C. This corresponds to a –10% dropout from a 5V nominal supply and is factory-trimmed for high accuracy without external calibration.
How does the SEL pin configure polarity for ADJ1 and ADJ2 on LTC2919IMS-5#PBF?
On the LTC2919IMS-5#PBF, the SEL pin sets ADJ1/ADJ2 polarity as follows: SEL = VCC configures both inputs for positive UV/OV; SEL = OPEN configures ADJ1 for positive UV/OV and ADJ2 for negative UV/OV; SEL = GND configures both for negative UV/OV. No external components are needed - the internal decode logic handles all three modes.
Can LTC2919IMS-5#PBF monitor a –5V supply, and how is it implemented?
Yes, the LTC2919IMS-5#PBF can monitor a –5V supply using its buffered 1V REF output and SEL pin. With SEL = GND or OPEN, ADJ1 or ADJ2 is configured for negative polarity; the –5V rail connects via a resistor divider to REF (1V) and GND, scaling the –5V to 0.5V at the ADJ pin. The IC then asserts OUTx low if the –5V magnitude drops below –4.925V (–5V × 0.985).
What are the reset timeout options for LTC2919IMS-5#PBF, and how are they selected?
The LTC2919IMS-5#PBF offers three reset timeout modes selected via the TMR pin: tied to GND for 200ms internal timeout; left open for ~400µs minimum timeout; tied to VCC for comparator mode (no timeout, immediate RST assertion). An external capacitor (CTMR) between TMR and GND sets timeout as 9ms/nF - e.g., 22nF yields 198ms.
Is LTC2919IMS-5#PBF qualified for automotive applications?
The LTC2919IMS-5#PBF is rated for –40°C to +85°C operation and is part of the AEC-Q100 qualified LTC2919 family. While the IMS-5 variant itself is not automotive-grade (which requires suffix W, e.g., LTC2919IDDB-5#WTRPBF), its I-grade temperature range and robust design make it suitable for non-safety-critical automotive subsystems such as infotainment and body electronics where full AEC-Q100 certification is not mandated.
LTC2919IMS-5#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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-MSOP
LTC2919IMS-5#PBF FAQ
1.How can I place an order for LTC2919IMS-5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2919IMS-5#PBF 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 LTC2919IMS-5#PBF reliable?
The price and inventory of LTC2919IMS-5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2919IMS-5#PBF is usually 5 days.
3.What payment methods are accepted for LTC2919IMS-5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2919IMS-5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2919IMS-5#PBF?
LTC2919IMS-5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2919IMS-5#PBF 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 LTC2919IMS-5#PBF?
For technical support, including LTC2919IMS-5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2919IMS-5#PBF requirements.
6.How does Aetrix verify that LTC2919IMS-5#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2919IMS-5#PBF 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 LTC2919IMS-5#PBF meets industry standards.
7.What is the process for return or replacement of LTC2919IMS-5#PBF?
All LTC2919IMS-5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2919IMS-5#PBF, 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 LTC2919IMS-5#PBF part is unused and in its original packaging.
Return procedure for LTC2919IMS-5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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