My Inquiry
My Account
Analog Devices Inc. LTC2919IMS-2.5#PBF
- Part No.:
- LTC2919IMS-2.5#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2919IMS-2.5#PBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,914
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2919IMS-2.5#PBF from Analog Devices is a precision triple/dual-input voltage supervisor IC designed for system-level supply monitoring in industrial and automotive electronics. It features two adjustable 0.5V-threshold inputs with ±1.5% accuracy over –40°C to +85°C, a dedicated 2.5V VCC UVLO monitor, open-drain RST/OUT1/OUT2 outputs, and pin-selectable polarity for positive/negative supply UV/OV detection - deployed in core power sequencing for network servers and automotive ECUs.
For engineers reviewing the LTC2919IMS-2.5#PBF datasheet, LTC2919IMS-2.5#PBF pinout, LTC2919IMS-2.5#PBF application, or LTC2919IMS-2.5#PBF equivalent, key selection criteria include guaranteed 0.5V ADJ threshold accuracy, 200ms internal reset timeout, buffered 1V reference for negative rail offset, 50µA quiescent current, and MSOP-10 package compatibility with space-constrained PCB layouts.
Technical Context
The LTC2919IMS-2.5#PBF implements dual independent comparators with user-configurable polarity via three-state SEL pin (VCC/GND/open), enabling simultaneous UV/OV monitoring of mixed-polarity supplies. Its third monitoring channel uses an accurate –10% VCC UVLO threshold (2.175V min at 2.5V nominal) with no external components required.
Reset behavior is governed by a configurable timeout: internal 200ms timer (TMR = GND), external capacitor-based timing (e.g., 20ms with 2.2nF), or comparator mode (TMR = VCC) for glitch-free immediate response. All outputs (RST, OUT1, OUT2) are open-drain, guaranteed low down to VCC = 0.5V, and support pull-up voltages exceeding VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 2.175V to 2.250V (–10% of 2.5V with ±1.5% accuracy); enables reliable 2.5V supply brownout detection without external resistors |
| ADJ Input Threshold | 495mV to 505mV (0.5V ±1.5%); supports precise UV/OV trip points for custom supply rails via resistor dividers |
| Quiescent Current | 50µA typical (–40°C to +85°C); enables always-on monitoring in battery-backed or low-power systems |
| Reference Output | 0.990V to 1.010V buffered 1V REF; provides stable offset for negative-supply monitoring circuits |
| Reset Timeout Options | Internal 200ms (TMR = GND), external capacitor (9ms/nF), or disabled (TMR = VCC); eliminates need for external RC timing networks |
| Operating Temp Range | –40°C to +85°C (I-grade); qualified for under-hood automotive and industrial control environments |
| Package | 10-Lead MSOP; 3mm × 3mm footprint with exposed pad option for thermal management |
Pinout & Package
Package: 10-Lead Plastic MSOP (LTDGS marking), 3mm × 3mm body, exposed pad (not electrically connected by default).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SEL (Pin 1) | Three-state polarity select input | Determines ADJ1/ADJ2 polarity: VCC = both positive, GND = both negative, open = ADJ1 positive / ADJ2 negative |
| VCC (Pin 2) | Power supply input with shunt regulator | Accepts 0.5V–6V directly; internal 6.5V shunt enables operation up to 60V with series resistor |
| OUT1 (Pin 3) | Open-drain status output for ADJ1 | Asserts low on ADJ1 fault; requires external pull-up; compatible with 3.3V/5V logic families |
| OUT2 (Pin 4) | Open-drain status output for ADJ2 | Independent fault indication; supports asynchronous monitoring of dual supplies |
| RST (Pin 5) | Open-drain inverted reset output | Asserts low if any monitored supply fails; held low for timeout after recovery |
| GND (Pin 6) | Device ground reference | Primary return path; exposed pad may be tied to GND for improved thermal performance |
| REF (Pin 7) | Buffered 1V reference output | Sources/sinks ±1mA; drives capacitive loads ≤1000pF; used for negative-rail offset in UV detection |
| TMR (Pin 8) | Reset timeout configuration terminal | GND = 200ms internal timeout; open = ~400µs; VCC = comparator mode (no timeout) |
| ADJ2 (Pin 9) | Adjustable voltage input 2 | 0.5V threshold comparator input; polarity set by SEL; tie to GND if unused |
| ADJ1 (Pin 10) | Adjustable voltage input 1 | 0.5V threshold comparator input; polarity set by SEL; tie to REF if unused |
Key Features
| Feature | Design Value |
|---|---|
| Polarity-selectable dual inputs | Single SEL pin configures three distinct ADJ1/ADJ2 polarity combinations - eliminates need for external logic or multiple supervisors |
| Accurate fixed VCC UVLO | 2.5V-specific –10% threshold (2.175V–2.250V) with ±1.5% tolerance - enables direct 2.5V rail monitoring without resistor dividers |
| Glitch-immune timing architecture | Combined 200ms internal timeout + comparator propagation delay filtering prevents false resets from load transients or noise spikes |
| Low-voltage output drive | RST/OUT1/OUT2 guaranteed low at VCC ≥ 0.5V - ensures deterministic reset assertion during deep brownout or partial power-up |
| Integrated 6.5V shunt regulator | Enables direct connection to high-voltage supplies (e.g., 12V/24V/48V) using only a single series resistor - reduces BOM count vs discrete solutions |
Applications
| Core Power Sequencing | Automotive ECU Monitoring |
|---|---|
Use Scenario: Coordinating startup/shutdown of multi-rail FPGA or SoC power domains (1.2V core, 3.3V I/O, 2.5V analog) in telecom base stations. IC Role / Device Role / Timing Role: LTC2919IMS-2.5#PBF acts as central voltage supervisor, asserting RST until all rails stabilize within ±1.5% threshold window and hold for 200ms. Use Value: Prevents metastability and latch-up by enforcing strict power-good sequencing - eliminates need for discrete timers or microcontroller intervention. | Use Scenario: Real-time monitoring of 2.5V sensor reference and 5V CAN transceiver supply in engine control units operating at –40°C to +85°C. IC Role / Device Role / Timing Role: LTC2919IMS-2.5#PBF monitors 2.5V rail via VCC UVLO and 5V rail via ADJ1 with positive polarity; triggers fail-safe shutdown on undervoltage. Use Value: AEC-Q100-qualified operation ensures reliability in harsh automotive environments; 50µA quiescent current minimizes battery drain during sleep mode. |
| Negative Supply UV Detection | Industrial PLC I/O Module |
Use Scenario: Detecting undervoltage on –12V op-amp bias rail in precision test equipment where loss of negative headroom causes signal clipping. IC Role / Device Role / Timing Role: LTC2919IMS-2.5#PBF configured with SEL = GND to set both ADJ inputs to negative polarity; REF pin offsets ADJ2 to monitor –12V relative to GND. Use Value: Eliminates need for level-shifting op-amps or isolated supplies - enables direct negative rail monitoring with <1.5% error across temperature. | Use Scenario: Supervising 2.5V microcontroller core voltage and 24V field-side I/O supply in programmable logic controllers with 200ms watchdog timeout. IC Role / Device Role / Timing Role: LTC2919IMS-2.5#PBF uses VCC UVLO for 2.5V core monitoring and ADJ1 (with resistor divider) for 24V I/O rail; RST output resets MCU on fault. Use Value: Single-chip solution replaces dual discrete supervisors - reduces PCB area by 40% and improves timing correlation between rail monitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G125DBVR | Fixed 1.25V reset threshold; no adjustable inputs; no polarity selection; 35µA IQ | Only monitors single supply; lacks dual adjustable inputs and negative rail capability | Select when only basic 1.25V supply monitoring is needed and board space is extremely constrained |
| MAX6326LT29D3+T | Fixed 2.93V reset threshold; no VCC UVLO; no REF output; 12µA IQ | Designed for 3V systems; cannot monitor 2.5V rail directly or provide buffered reference | Select for ultra-low-power 3V applications where 2.5V supervision and negative rail support are not required |
Compared with TPS3808G125DBVR and MAX6326LT29D3+T, the LTC2919IMS-2.5#PBF uniquely supports dual adjustable inputs with polarity selection, integrated 2.5V VCC UVLO, and buffered 1V REF - making it the only option capable of monitoring mixed-polarity supplies in a single 10-pin MSOP package.
Availability
LTC2919IMS-2.5#PBF is available at Aetrix Electronics and suitable for automotive ECU designs, industrial PLC modules, telecom base station power sequencing, and medical instrumentation requiring stable component supply with full temperature-range validation.
Supply support for LTC2919IMS-2.5#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 voltage supervision with configurable polarity and timing - engineered for mission-critical power integrity in automotive, telecom, and industrial control systems.
FAQ
What is the guaranteed VCC UVLO threshold range for LTC2919IMS-2.5#PBF?
The LTC2919IMS-2.5#PBF has a guaranteed VCC UVLO threshold of 2.175V to 2.250V (–10% of 2.5V with ±1.5% accuracy) over its full –40°C to +85°C operating range. This allows direct, resistor-free monitoring of 2.5V supplies without calibration. The threshold is internally trimmed and does not require external components. The LTC2919IMS-2.5#PBF datasheet specifies this range in the Electrical Characteristics table under VCC(UVLO) parameter.
Can LTC2919IMS-2.5#PBF monitor negative voltages, and how is polarity selected?
Yes, the LTC2919IMS-2.5#PBF can monitor negative voltages using its ADJ1 and ADJ2 inputs with polarity selected via the three-state SEL pin. When SEL = GND, both inputs operate in negative polarity mode - detecting undervoltage when the negative rail rises toward zero (e.g., –4.3V on a –5V supply). The buffered 1V REF output provides the necessary offset for negative-rail resistor dividers. The LTC2919IMS-2.5#PBF supports all three polarity configurations per Table 1 in its datasheet.
What are the reset timeout options available on LTC2919IMS-2.5#PBF?
The LTC2919IMS-2.5#PBF offers three reset timeout modes controlled by the TMR pin: (1) internal 200ms timer (TMR = GND), (2) external capacitor timing (9ms/nF, e.g., 20ms with 2.2nF), or (3) comparator mode with no timeout (TMR = VCC). All modes are mutually exclusive and require no additional components beyond the capacitor in external mode. The LTC2919IMS-2.5#PBF guarantees monotonic timeout behavior across temperature.
Does LTC2919IMS-2.5#PBF support operation from supplies above 6V?
Yes, the LTC2919IMS-2.5#PBF supports operation from supplies above 6V using its internal 6.5V shunt regulator on the VCC pin. A series current-limiting resistor must be added between the high-voltage supply and VCC to keep input current ≤10mA. For example, with a 24V supply, a 1.8kΩ resistor limits current to ~10mA. The LTC2919IMS-2.5#PBF datasheet provides the exact resistor calculation formula in the Applications Information section.
What is the maximum sink current capability of LTC2919IMS-2.5#PBF's open-drain outputs?
The LTC2919IMS-2.5#PBF's RST, OUT1, and OUT2 outputs guarantee VOL ≤ 0.15V at 2500µA sink current when VCC = 3V, and ≤ 0.30V at the same current per Electrical Characteristics. At lower VCC (e.g., 0.5V), they guarantee VOL ≤ 0.15V with 5µA sink. These specs ensure robust logic-low assertion into standard pull-up configurations. The LTC2919IMS-2.5#PBF maintains this performance across its full temperature range.
LTC2919IMS-2.5#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:
- 2.213V, 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-2.5#PBF FAQ
1.How can I place an order for LTC2919IMS-2.5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2919IMS-2.5#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-2.5#PBF reliable?
The price and inventory of LTC2919IMS-2.5#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-2.5#PBF is usually 5 days.
3.What payment methods are accepted for LTC2919IMS-2.5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2919IMS-2.5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2919IMS-2.5#PBF?
LTC2919IMS-2.5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2919IMS-2.5#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-2.5#PBF?
For technical support, including LTC2919IMS-2.5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2919IMS-2.5#PBF requirements.
6.How does Aetrix verify that LTC2919IMS-2.5#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2919IMS-2.5#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-2.5#PBF meets industry standards.
7.What is the process for return or replacement of LTC2919IMS-2.5#PBF?
All LTC2919IMS-2.5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2919IMS-2.5#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-2.5#PBF part is unused and in its original packaging.
Return procedure for LTC2919IMS-2.5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2919IMS-2.5#PBF Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
