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Analog Devices Inc. LTC2919HDDB-5#TRMPBF
- Part No.:
- LTC2919HDDB-5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2919HDDB-5#TRMPBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,275
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Product details
Overview
LTC2919HDDB-5#TRMPBF from Analog Devices is a precision triple-input voltage supervisor IC for automotive and industrial power monitoring, featuring two adjustable 0.5V-threshold inputs (±1.5% accuracy), a fixed -10% VCC UVLO monitor for 5V supplies, open-drain RST/OUT1/OUT2 outputs, and selectable input polarity via three-state SEL pin. It operates across –40°C to 125°C in a 10-lead 3mm × 2mm DFN package with 50µA quiescent current.
For engineers reviewing the LTC2919HDDB-5#TRMPBF datasheet, LTC2919HDDB-5#TRMPBF pinout, LTC2919HDDB-5#TRMPBF application, or LTC2919HDDB-5#TRMPBF equivalent, key selection considerations include its guaranteed ±1.5% threshold accuracy over temperature, internal 200ms reset timeout, buffered 1V reference for negative-supply offset, 6.5V shunt regulator for high-voltage operation, and AEC-Q100 qualification for automotive use.
Technical Context
The LTC2919HDDB-5#TRMPBF implements dual independent comparator channels with user-selectable polarity (positive/negative UV/OV) controlled by the three-state SEL pin, plus a dedicated VCC UVLO comparator set to 4.50V (–10% of 5V). Its glitch-filtered propagation delay (50–800µs) and configurable reset timeout (internal 200ms, external capacitor, or disabled) ensure robust fault detection under transient conditions.
It integrates a buffered 1.000V reference (±10mV over temperature, ±1mA drive), a 6.5V shunt regulator on VCC enabling operation up to 6V directly or higher with series resistor limiting ICC ≤10mA, and open-drain outputs guaranteed low down to VCC = 0.5V - critical for reliable power-up sequencing in automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 4.50V nominal (–10% of 5V supply), ±0.075V accuracy over –40°C to 125°C - enables precise 5V rail monitoring without external components |
| ADJ Input Threshold | 492.5mV to 507.5mV (±1.5% of 500mV), tight tolerance ensures accurate UV/OV trip points across full temperature range |
| Quiescent Current | 50µA typical at 5V, ≤280µA max over temperature - supports always-on monitoring in low-power automotive modules |
| Reset Timeout | 200ms internal timer (TMR = GND), or externally programmable (9ms/nF), or disabled (TMR = VCC) - provides flexible system reset timing control |
| Reference Output | 1.000V ±10mV buffered reference, ±1mA drive capability - enables accurate offset for negative-supply monitoring (e.g., –5V, –12V) |
| Operating Temp Range | –40°C to +125°C (H-grade), qualified per AEC-Q100 Grade 0 - suitable for under-hood automotive applications |
| Package | 10-lead 3mm × 2mm DFN with exposed pad - compact footprint, thermal performance optimized for high-reliability environments |
Pinout & Package
Package: 10-lead (3mm × 2mm) plastic DFN with exposed pad (Pin 11), rated TJMAX = 150°C, θJA = 76°C/W. Exposed pad may be left open 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: VCC = both positive, OPEN = ADJ1+, ADJ2–, GND = both negative - enables UV/OV monitoring of mixed-sign rails without external logic |
| VCC (Pin 2) | Power supply input / shunt regulator | Accepts 0.5V–6V directly; >6V requires series resistor due to integrated 6.5V shunt - simplifies high-voltage biasing in 12V/24V automotive systems |
| OUT1 (Pin 3) | Open-drain output 1 | Asserts low when ADJ1 invalid (UV/OV per SEL setting); requires external pull-up - drives microcontroller reset or FPGA configuration logic |
| OUT2 (Pin 4) | Open-drain output 2 | Asserts low when ADJ2 invalid (UV/OV per SEL setting); independent of OUT1 - enables dual-rail status indication |
| RST (Pin 5) | Open-drain inverted reset output | Asserts low if any monitored input invalid or VCC < 4.50V; held low for timeout after recovery - provides system-wide reset coordination |
| GND (Pin 6) | Device ground reference | Primary return path for all analog and digital circuitry - must be low-impedance connection to PCB ground plane |
| REF (Pin 7) | Buffered 1V reference output | Stable 1.000V ±10mV source/sink up to ±1mA - used as offset for negative-supply divider networks (e.g., monitoring –5V with ADJx = REF – Vrail) |
| TMR (Pin 8) | Reset timeout control | GND = 200ms internal timeout, VCC = comparator mode (no timeout), capacitor to GND = 9ms/nF - selects reset behavior without firmware intervention |
| ADJ2 (Pin 9) | Adjustable voltage input 2 | 0.5V threshold comparator input; polarity set by SEL - monitors second supply (e.g., 3.3V I/O rail or –12V analog rail) |
| ADJ1 (Pin 10) | Adjustable voltage input 1 | 0.5V threshold comparator input; polarity set by SEL - primary supply monitor (e.g., 5V core rail or –5V bias rail) |
Key Features
| Feature | Design Value |
|---|---|
| Polarity-selectable dual inputs | Single SEL pin configures ADJ1/ADJ2 for positive UV, negative OV, or mixed polarity - eliminates need for external inverters or dual supervisors |
| Guaranteed low outputs at low VCC | RST/OUT1/OUT2 sink to ≤0.15V with VCC ≥0.5V - ensures deterministic logic state during brownout and cold-cranking conditions |
| Accurate fixed VCC UVLO | 4.50V ±0.075V threshold for 5V supply - provides third independent monitor without external resistors or calibration |
| Integrated 1V buffered reference | 1.000V ±10mV, ±1mA drive, stable over temperature - enables precise negative-rail monitoring using simple resistor dividers |
| Glitch-immune timing architecture | Propagation delay filtering (50–800µs) + configurable timeout (200ms internal or external) - rejects noise while maintaining fast fault response |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Sequencing |
|---|---|
Use Scenario: Monitoring 5V microcontroller supply and 12V sensor bias rail in under-hood ECU subject to cold cranking (4.5V) and load dump (36V). IC Role / Device Role / Timing Role: LTC2919HDDB-5#TRMPBF acts as primary supervisor: VCC monitors 5V rail (4.50V UVLO), ADJ1 monitors 12V via resistor divider, SEL = OPEN enables ADJ1+ (UV) and ADJ2– (OV) for 12V overvoltage detection. Use Value: AEC-Q100 H-grade operation ensures reliability at 125°C; 6.5V shunt regulator allows direct 12V connection with series resistor; 200ms reset timeout prevents nuisance resets during transient dips. | Use Scenario: Coordinating startup of 24V fieldbus interface and 3.3V FPGA core in modular PLC backplane with strict power sequencing requirements. IC Role / Device Role / Timing Role: LTC2919HDDB-5#TRMPBF serves as dual-rail supervisor: ADJ1 monitors 24V (scaled to 0.5V), ADJ2 monitors 3.3V (scaled), SEL = VCC sets both for positive UV detection; RST holds FPGA in reset until both rails stabilize. Use Value: ±1.5% threshold accuracy guarantees no false resets within 3.3V ±5% and 24V ±10% tolerances; open-drain outputs interface directly with FPGA reset pin and fieldbus enable logic. |
| Medical Imaging Power Supply | Telecom Base Station Bias Monitoring |
Use Scenario: Supervising isolated ±15V analog front-end supplies in MRI signal conditioning module where noise immunity and long-term stability are critical. IC Role / Device Role / Timing Role: LTC2919HDDB-5#TRMPBF monitors –15V and +15V rails: ADJ1 connected to –15V divider referenced to REF (1V), ADJ2 to +15V divider, SEL = GND sets both for negative polarity (UV detection). Use Value: Buffered 1V reference enables accurate –15V UV threshold (–14.25V) without floating grounds; 50µA quiescent current minimizes self-heating in thermally sensitive imaging subsystems. | Use Scenario: Detecting undervoltage on –48V telecom supply and overvoltage on +5V control rail in remote radio head unit operating in outdoor enclosures. IC Role / Device Role / Timing Role: LTC2919HDDB-5#TRMPBF performs mixed-polarity monitoring: ADJ1 (–48V, SEL = GND) for –48V UV, ADJ2 (+5V, SEL = VCC) for +5V OV; RST asserts if either fault occurs. Use Value: Three-state SEL eliminates need for level shifters; 125°C rating supports operation in sealed, passively cooled enclosures; glitch filtering suppresses switching noise from nearby DC/DC converters. |
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 polarity selection, no buffered reference | Only monitors one rail; lacks dual-adjustable capability and negative-supply support | Select only for simple single-rail 3.3V monitoring where cost is prioritized over flexibility |
| MAX6326–L31D | Triple fixed-threshold supervisor (1.23V, 2.93V, 4.63V), no adjustable inputs, no polarity control, no reference output | Fixed thresholds limit adaptability to non-standard rails; no support for negative supplies or custom UV/OV windows | Choose when monitoring standard 1.2V, 3.3V, and 5V rails simultaneously without need for scaling or polarity inversion |
Compared with TPS3808G33DBVR and MAX6326–L31D, the LTC2919HDDB-5#TRMPBF offers unique dual adjustable inputs with polarity selection, a buffered 1V reference, and AEC-Q100 qualification - making it the only option capable of monitoring mixed-sign rails (e.g., +5V and –12V) in automotive or industrial environments requiring extended temperature operation and high accuracy.
Availability
LTC2919HDDB-5#TRMPBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC power sequencing, medical imaging power supplies, and telecom base station bias monitoring requiring stable component supply across extended temperature ranges and AEC-Q100 compliance.
Supply support for LTC2919HDDB-5#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, Inc. 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 - designed specifically for automotive and industrial systems demanding high reliability, wide temperature operation, and minimal external components.
FAQ
What is the guaranteed VCC UVLO threshold for LTC2919HDDB-5#TRMPBF?
The LTC2919HDDB-5#TRMPBF has a guaranteed VCC UVLO threshold of 4.50V (–10% of 5V) with ±0.075V accuracy over the full –40°C to +125°C operating range. This specification applies specifically to the -5 variant and is validated per the manufacturer's electrical characteristics table, ensuring precise 5V rail monitoring without external resistor networks.
How does the SEL pin configure polarity for ADJ1 and ADJ2 on LTC2919HDDB-5#TRMPBF?
On the LTC2919HDDB-5#TRMPBF, the SEL pin determines polarity: tied to VCC sets both ADJ1 and ADJ2 for positive polarity (UV detection), grounded sets both for negative polarity (UV detection), and left open sets ADJ1 for positive and ADJ2 for negative polarity. This mapping is defined in Table 1 of the datasheet and enables flexible UV/OV monitoring of mixed-sign rails without external components.
Can LTC2919HDDB-5#TRMPBF monitor negative voltages, and how is that implemented?
Yes, the LTC2919HDDB-5#TRMPBF can monitor negative voltages using its buffered 1V reference (REF pin) and polarity-selectable ADJ inputs. For example, connecting ADJ1 to a resistor divider between –15V and REF generates a 0.5V input when –15V is at nominal value; SEL = GND configures ADJ1 for negative polarity, so a drop to –14.25V (–5%) pulls OUT1 low. This method avoids floating grounds and leverages the device's built-in reference.
What is the maximum supply voltage that can be applied directly to the VCC pin of LTC2919HDDB-5#TRMPBF?
The VCC pin of LTC2919HDDB-5#TRMPBF can accept up to 6V directly. Beyond 6V, the internal 6.5V shunt regulator activates, requiring a series current-limiting resistor to keep ICC ≤10mA. The absolute maximum VCC voltage is 6V for direct connection; higher voltages (e.g., 12V automotive) must use an external resistor sized per the formula in the datasheet to prevent excessive power dissipation and ensure reliable operation.
Does LTC2919HDDB-5#TRMPBF support AEC-Q100 qualification, and what grade does it meet?
Yes, the LTC2919HDDB-5#TRMPBF is AEC-Q100 qualified for automotive applications and meets Grade 0 specifications (–40°C to +125°C ambient operating temperature). This qualification is explicitly stated in the "ORDER INFORMATION" section of the datasheet and confirmed by the "HDDB" suffix denoting the high-temperature automotive-grade DFN package variant.
LTC2919HDDB-5#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:
- 4.425V, 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-5#TRMPBF FAQ
1.How can I place an order for LTC2919HDDB-5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2919HDDB-5#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 LTC2919HDDB-5#TRMPBF reliable?
The price and inventory of LTC2919HDDB-5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2919HDDB-5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2919HDDB-5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2919HDDB-5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2919HDDB-5#TRMPBF?
LTC2919HDDB-5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2919HDDB-5#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 LTC2919HDDB-5#TRMPBF?
For technical support, including LTC2919HDDB-5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2919HDDB-5#TRMPBF requirements.
6.How does Aetrix verify that LTC2919HDDB-5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2919HDDB-5#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 LTC2919HDDB-5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2919HDDB-5#TRMPBF?
All LTC2919HDDB-5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2919HDDB-5#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 LTC2919HDDB-5#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2919HDDB-5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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