My Inquiry
My Account
Analog Devices Inc. LTC2919HDDB-2.5#TRPBF
- Part No.:
- LTC2919HDDB-2.5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2919HDDB-2.5#TRPBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,982
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2919HDDB-2.5#TRPBF from Analog Devices is a precision triple/dual-input undervoltage/overvoltage monitor IC for system power supervision. It features two adjustable 0.5V-threshold inputs (±1.5% accuracy over –40°C to +125°C), a fixed 2.5V VCC UVLO input, open-drain RST/OUT1/OUT2 outputs, and a configurable reset timeout-enabling robust monitoring of core, I/O, or automotive rail voltages in space-constrained designs.
For engineers reviewing the LTC2919HDDB-2.5#TRPBF datasheet, LTC2919HDDB-2.5#TRPBF pinout, LTC2919HDDB-2.5#TRPBF application, or LTC2919HDDB-2.5#TRPBF equivalent, key selection considerations include its ±1.5% threshold accuracy across automotive temperature range, 50µA quiescent current, 10-lead 3mm × 2mm DFN package, and support for positive/negative supply monitoring via three-state SEL polarity control.
Technical Context
The LTC2919HDDB-2.5#TRPBF implements dual independent voltage comparators with programmable polarity (via SEL pin) and a dedicated VCC UVLO detector. Its 0.5V nominal ADJ thresholds are referenced to an internal buffered 1.000V reference, enabling precise ratio-based monitoring of any supply using external resistor dividers.
Reset assertion is synchronized across all monitored inputs: RST remains low until both ADJ inputs and VCC exceed their respective thresholds for the full timeout period (200ms internal, capacitor-programmable, or disabled). Glitch filtering on comparator propagation (50–800µs delay vs. overdrive) and TMR pin hysteresis (40–160mV) ensure noise immunity without sacrificing DC accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 2.175V to 2.250V (–10% of 2.5V, ±1.5% accuracy over –40°C to +125°C) |
| ADJ Input Threshold | 492.5mV to 507.5mV (0.5V nominal, ±1.5% accuracy over full temp range) |
| Quiescent Current | 50µA typical (enables micropower operation in always-on automotive modules) |
| Reference Output | 0.985V to 1.015V at ±1mA load (buffered 1V reference for negative-supply offset applications) |
| Reset Timeout | 200ms internal (guaranteed 140–280ms), or externally programmable via TMR pin capacitance |
| Operating Temp Range | –40°C to +125°C (H-grade, AEC-Q100 qualified for under-hood automotive use) |
| Package | 10-lead 3mm × 2mm DFN with exposed pad (thermal resistance θJA = 76°C/W) |
Pinout & Package
Package: 10-lead plastic DFN (3mm × 2mm), exposed thermal pad (Pin 11), RoHS-compliant, lead-free finish.
| 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 | Operates from 0.5V to 6V; includes 6.5V shunt regulator for high-voltage operation with series resistor |
| OUT1 (Pin 3) | Open-drain output 1 | Asserts low when ADJ1 is invalid (UV/OV per SEL setting); requires external pull-up; supports voltage levels > VCC |
| OUT2 (Pin 4) | Open-drain output 2 | Asserts low when ADJ2 is invalid; independent of OUT1; same electrical specs as OUT1 |
| RST (Pin 5) | Open-drain inverted reset output | Asserts low if any monitored input fails; held low for full timeout after all inputs recover |
| GND (Pin 6) | Ground reference | Primary return path; exposed pad (Pin 11) may be tied to GND for improved thermal performance |
| REF (Pin 7) | Buffered 1V reference output | Sources/sinks ±1mA; drives up to 1000pF; used for negative-supply offset in dual-polarity monitoring |
| TMR (Pin 8) | Reset timeout control | Ground = 200ms internal timeout; VCC = comparator mode (no timeout); capacitor-to-GND = 9ms/nF programmable timeout |
| ADJ2 (Pin 9) | Adjustable input 2 | 0.5V threshold comparator input; polarity set by SEL; tie to GND if unused (with SEL = GND or open) |
| ADJ1 (Pin 10) | Adjustable input 1 | 0.5V threshold comparator input; polarity set by SEL; tie to REF if unused (with SEL = VCC or open) |
Key Features
| Feature | Design Value |
|---|---|
| Precision threshold accuracy | ±1.5% over –40°C to +125°C ensures reliable trip points without derating for automotive thermal stress |
| Triple independent monitoring | Two adjustable inputs + fixed 2.5V VCC UVLO enables complete power-rail supervision with single IC |
| Configurable polarity per input | SEL pin selects positive/negative UV/OV detection per ADJ input-no external components required |
| Low-power operation | 50µA quiescent current allows integration into battery-backed or always-on vehicle subsystems |
| Robust glitch immunity | Proprietary comparator propagation delay + TMR hysteresis prevents false resets from transient noise |
| High-voltage compatibility | 6.5V VCC shunt regulator enables direct connection to 12V/24V automotive batteries with simple series resistor |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Module |
|---|---|
Use Scenario: Monitoring 5V microcontroller core supply and –12V sensor bias rail in under-hood ECU with ambient temperatures up to +125°C. IC Role / Device Role / Timing Role: LTC2919HDDB-2.5#TRPBF acts as primary power supervisor-detecting UV on 5V rail and OV on –12V rail simultaneously via SEL-configured polarity, asserting RST to halt processor execution during fault. Use Value: ±1.5% threshold accuracy over full automotive temperature range eliminates need for margining, reducing risk of nuisance resets during thermal cycling. | Use Scenario: Supervising 3.3V FPGA I/O bank and 24V fieldbus interface supply in industrial programmable logic controller with brownout resilience requirements. IC Role / Device Role / Timing Role: LTC2919HDDB-2.5#TRPBF monitors 3.3V I/O (ADJ1) and 24V bus (ADJ2 via resistor divider), generating sequenced reset signals with 200ms timeout to prevent premature reconfiguration during line transients. Use Value: Open-drain outputs pulled to separate supply domains enable level-shifted reset signaling without additional level translators. |
| Server CPU Voltage Regulator Module (VRM) | Medical Imaging Power Sequencer |
Use Scenario: Detecting undervoltage on 1.8V CPU core rail and overvoltage on 12V auxiliary rail in high-density server VRM with strict power-good timing. IC Role / Device Role / Timing Role: LTC2919HDDB-2.5#TRPBF provides independent OUT1/OUT2 status flags and synchronized RST assertion-ensuring CPU reset occurs only after both rails stabilize within tolerance. Use Value: 50µA quiescent current minimizes impact on VRM efficiency while maintaining full diagnostic capability during low-power idle states. | Use Scenario: Validating dual ±15V analog front-end supplies and 5V digital logic rail in MRI signal conditioning module requiring fail-safe shutdown on any rail fault. IC Role / Device Role / Timing Role: LTC2919HDDB-2.5#TRPBF uses REF pin to offset ADJ inputs for symmetric ±15V monitoring, with RST triggering emergency power-down sequence via isolated gate driver. Use Value: Buffered 1V reference eliminates need for external precision reference, reducing BOM count and layout area in safety-critical medical PCBs. |
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 fixed UVLO; no adjustable inputs, no negative monitoring, no REF output | Only suitable for basic 3.3V rail monitoring-lacks dual-adjustable capability and polarity flexibility | Select only if monitoring a single positive rail with no requirement for negative supply or programmable thresholds |
| MAX6326LT29D3+T | Fixed 2.93V UVLO with watchdog timer; no OV detection, no dual inputs, no polarity selection | Designed for microprocessor reset only-cannot replace LTC2919HDDB-2.5#TRPBF in multi-rail or OV-critical systems | Choose only for legacy 2.93V microcontroller reset where watchdog functionality is required and multi-rail supervision is unnecessary |
Compared with TPS3808G33DBVR and MAX6326LT29D3+T, the LTC2919HDDB-2.5#TRPBF uniquely delivers triple-input supervision with ±1.5% accuracy, polarity-selectable dual adjustable thresholds, and buffered reference-making it irreplaceable in automotive and industrial multi-rail systems requiring coordinated fault response.
Availability
LTC2919HDDB-2.5#TRPBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC power modules, server VRMs, and medical imaging power sequencers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2919HDDB-2.5#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 with precision power management solutions.
The LTC2919 product line delivers highly accurate, low-power, multi-rail voltage supervisors designed specifically for mission-critical automotive and industrial applications demanding AEC-Q100 qualification and guaranteed parametric performance across extreme temperatures.
FAQ
What is the operating temperature range for the LTC2919HDDB-2.5#TRPBF? The LTC2919HDDB-2.5#TRPBF is rated for –40°C to +125°C (H-grade), fully qualified to AEC-Q100 standards for automotive under-hood applications, with guaranteed ±1.5% threshold accuracy across this entire range.
How does the SEL pin configure polarity for ADJ1 and ADJ2 on the LTC2919HDDB-2.5#TRPBF?
The SEL pin on the LTC2919HDDB-2.5#TRPBF is a three-state input: tied to VCC configures both ADJ1 and ADJ2 for positive polarity (UV/OV detection on positive rails); tied to GND configures both for negative polarity (UV/OV on negative rails); left open configures ADJ1 positive and ADJ2 negative-enabling mixed-rail monitoring without external logic.
Can the LTC2919HDDB-2.5#TRPBF monitor a 12V automotive battery directly?
Yes-the LTC2919HDDB-2.5#TRPBF includes a 6.5V shunt regulator on the VCC pin. To monitor a 12V battery, connect it through a current-limiting resistor (e.g., 5.6kΩ) to VCC, ensuring input current stays below 10mA. The internal regulator clamps VCC to ~6.5V, enabling safe operation without external LDO.
What is the minimum VCC voltage required for the LTC2919HDDB-2.5#TRPBF to assert valid logic-low outputs?
The LTC2919HDDB-2.5#TRPBF guarantees logic-low output voltage (VOL ≤ 0.15V) on RST, OUT1, and OUT2 with VCC as low as 0.5V-critical for clean power-up sequencing in systems where VCC ramps slowly or experiences brownouts before reaching nominal voltage.
Does the LTC2919HDDB-2.5#TRPBF support hysteresis on its adjustable inputs?
No-the LTC2919HDDB-2.5#TRPBF provides no built-in hysteresis on ADJ1/ADJ2 inputs to preserve ±1.5% threshold accuracy. Hysteresis is only active in comparator mode (TMR = VCC), where it affects invalid-to-valid transitions. For standard operation, external RC filtering or resistor-divider hysteresis must be added if needed.
LTC2919HDDB-2.5#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:
- 2.213V, 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-2.5#TRPBF FAQ
1.How can I place an order for LTC2919HDDB-2.5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2919HDDB-2.5#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-2.5#TRPBF reliable?
The price and inventory of LTC2919HDDB-2.5#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-2.5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2919HDDB-2.5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2919HDDB-2.5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2919HDDB-2.5#TRPBF?
LTC2919HDDB-2.5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2919HDDB-2.5#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-2.5#TRPBF?
For technical support, including LTC2919HDDB-2.5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2919HDDB-2.5#TRPBF requirements.
6.How does Aetrix verify that LTC2919HDDB-2.5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2919HDDB-2.5#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-2.5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2919HDDB-2.5#TRPBF?
All LTC2919HDDB-2.5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2919HDDB-2.5#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-2.5#TRPBF part is unused and in its original packaging.
Return procedure for LTC2919HDDB-2.5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2919HDDB-2.5#TRPBF 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…
