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Analog Devices Inc. LTC2919IDDB-2.5#TRPBF
- Part No.:
- LTC2919IDDB-2.5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2919IDDB-2.5#TRPBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,146
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Product details
Overview
LTC2919IDDB-2.5#TRPBF from Analog Devices is a precision triple/dual-input voltage supervisor IC designed for system-level supply monitoring in automotive and industrial applications. It features two adjustable 0.5V-threshold inputs with ±1.5% accuracy over –40°C to +85°C, a fixed 2.5V VCC UVLO monitor, open-drain RST/OUT1/OUT2 outputs, and pin-selectable polarity for positive/negative supply UV/OV detection.
For engineers reviewing the LTC2919IDDB-2.5#TRPBF datasheet, LTC2919IDDB-2.5#TRPBF pinout, LTC2919IDDB-2.5#TRPBF application, or LTC2919IDDB-2.5#TRPBF 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 DFN-10 (3mm × 2mm) package compatibility with AEC-Q100 Grade I automotive requirements.
Technical Context
The LTC2919IDDB-2.5#TRPBF integrates three independent monitoring channels: two user-adjustable inputs (ADJ1/ADJ2) with 0.5V nominal thresholds and a fixed VCC UVLO set at 2.175V (–10% of 2.5V). Its three-state SEL pin configures input polarity without external components-enabling simultaneous UV/OV detection on mixed-sign supplies.
Reset behavior is governed by a configurable timeout: internal 200ms timer (TMR = GND), external capacitor (9ms/nF), or disabled comparator mode (TMR = VCC). Glitch filtering on ADJ inputs and propagation delay (50–800µs) prevent false triggering from transient noise, while outputs guarantee logic-low state down to VCC = 0.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 2.175V (–10% of 2.5V), ±0.0375V tolerance over –40°C to +85°C - ensures reliable power-on reset for 2.5V systems |
| ADJ Input Threshold | 495–505mV (±1.5% of 500mV) - enables accurate UV/OV detection on regulated rails with tight tolerance margins |
| Quiescent Current | 50µA typical at VCC = 2.5V - supports always-on monitoring in low-power automotive ECUs |
| Reference Output | 0.990–1.010V buffered REF, ±1mA drive - provides stable offset for negative-supply monitoring circuits |
| Reset Timeout Options | Internal 200ms (TMR = GND), external 15–27ms (CTMR = 2.2nF), or disabled (TMR = VCC) - balances fault response speed vs. glitch immunity |
| Operating Temperature | –40°C to +85°C (I-grade) - qualified for under-hood automotive environments per AEC-Q100 |
| Package | 10-lead 3mm × 2mm DFN with exposed pad - enables compact PCB layout and thermal performance in space-constrained modules |
Pinout & Package
Package: 10-lead (3mm × 2mm) plastic DFN (DDB), exposed pad (Pin 11) optional ground connection for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SEL (1) | Three-state polarity select | Configures ADJ1/ADJ2 as (+)UV/(–)OV, (+)UV/(–)OV, or (–)UV/(+)OV - eliminates need for external logic or resistors |
| VCC (2) | Power supply input | Operates directly up to 6V; internal 6.5V shunt regulator enables high-voltage operation with series resistor |
| OUT1 (3) | Open-drain status output | Asserts low when ADJ1 is invalid - compatible with 3.3V/5V logic pull-ups and level-shifted interfaces |
| OUT2 (4) | Open-drain status output | Asserts low when ADJ2 is invalid - supports independent fault reporting for dual-rail systems |
| RST (5) | Open-drain inverted reset | Held low until both ADJ inputs and VCC are valid for full timeout period - prevents premature MCU release during brownout |
| GND (6) | Ground reference | Common return path for all analog and digital circuitry - requires low-impedance PCB plane |
| REF (7) | Buffered 1V reference | Sources/sinks ±1mA - used to bias resistive dividers for negative-supply monitoring (e.g., –5V, –12V) |
| TMR (8) | Reset timeout control | Selects internal 200ms, external capacitor timing, or disables timeout - defines system recovery latency after fault clearance |
| ADJ2 (9) | Adjustable input 2 | 0.5V threshold comparator input - polarity set by SEL; tie to GND if unused (SEL = GND/Open) |
| ADJ1 (10) | Adjustable input 1 | 0.5V threshold comparator input - polarity set by SEL; tie to REF if unused (SEL = VCC/Open) |
Key Features
| Feature | Design Value |
|---|---|
| Polarity-selectable inputs | SEL pin configures ADJ1/ADJ2 for positive/negative UV or OV detection - enables single-IC monitoring of asymmetric supplies (e.g., +5V and –12V) |
| Guaranteed low outputs at low VCC | RST/OUT1/OUT2 sink to <0.15V with VCC ≥ 0.5V - ensures deterministic reset assertion during deep brownout |
| Glitch-immune comparators | Propagation delay (50–800µs) and internal filtering reject sub-10µs transients - eliminates need for external RC filters in most applications |
| Accurate buffered reference | 1V REF with ±0.015V variation over temperature - enables precise negative-rail trip points without external op-amps |
| AEC-Q100 qualified | I-grade (–40°C to +85°C) with automotive reliability testing - suitable for engine control, ADAS, and body electronics |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Sequencing |
|---|---|
Use Scenario: Monitoring 2.5V microcontroller core supply and 5V I/O rail in an under-hood ECU subject to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: LTC2919IDDB-2.5#TRPBF acts as primary supervisor - detecting UV on 2.5V rail via VCC pin and OV on 5V rail via ADJ2 with negative polarity configuration. Use Value: ±1.5% threshold accuracy ensures reset asserts only outside 5% supply tolerance band, preventing nuisance resets during transient voltage sags. | Use Scenario: Coordinating startup of dual isolated 24V DC-DC converters powering FPGA and analog signal chain in a modular PLC backplane. IC Role / Device Role / Timing Role: LTC2919IDDB-2.5#TRPBF monitors both converter outputs using ADJ1/ADJ2 with SEL = VCC, generating sequenced RST assertion with 200ms timeout. Use Value: Internal 200ms timeout guarantees FPGA configuration completes before analog subsystem powers up - eliminating race conditions. |
| Network Equipment Line Card | Medical Imaging Power Management |
Use Scenario: Supervising +3.3V and –3.3V analog front-end supplies in a 10G Ethernet PHY module where noise immunity is critical. IC Role / Device Role / Timing Role: LTC2919IDDB-2.5#TRPBF uses REF pin to bias ADJ2 divider for –3.3V UV detection, while ADJ1 monitors +3.3V OV with SEL = OPEN. Use Value: Buffered 1V REF eliminates drift-induced errors in negative-rail trip points, maintaining ±1.5% accuracy across temperature. | Use Scenario: Ensuring safe power-up sequence for CT scanner detector ASICs requiring strict voltage sequencing between +1.8V, +3.3V, and –5V rails. IC Role / Device Role / Timing Role: LTC2919IDDB-2.5#TRPBF monitors all three rails: VCC (2.5V logic), ADJ1 (+1.8V), and ADJ2 (–5V) with SEL = GND for dual-negative polarity. Use Value: Three independent outputs (RST, OUT1, OUT2) enable discrete fault isolation - allowing diagnostic firmware to identify which rail failed. |
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 or negative supply support; 350ms fixed timeout | Limited to single-rail monitoring; unsuitable for mixed-sign or dual-rail systems | Select only for simple 3.3V-only applications where cost is prioritized over flexibility |
| MAX6326LT29D3+T | Fixed 2.93V UVLO; no ADJ inputs; push-pull RST output; 200ms timeout | No polarity selection or REF output - cannot monitor negative supplies or provide offset references | Choose when only basic 2.93V UV detection is required and board space allows larger SOT-23 package |
Compared with TPS3808G33DBVR and MAX6326LT29D3+T, the LTC2919IDDB-2.5#TRPBF delivers unique triple-monitor capability with programmable polarity, buffered reference, and dual adjustable inputs - making it the only option capable of replacing discrete supervisors in multi-rail automotive and industrial designs.
Availability
LTC2919IDDB-2.5#TRPBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLCs, network line cards, and medical imaging systems requiring stable component supply with AEC-Q100 compliance and long-term lifecycle support.
Supply support for LTC2919IDDB-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.
The LTC2919 belongs to Analog Devices' precision voltage supervisor product line, engineered for high-accuracy, low-power system monitoring in harsh environments where reliability and parametric consistency are critical.
FAQ
What is the operating temperature range for the LTC2919IDDB-2.5#TRPBF?
The LTC2919IDDB-2.5#TRPBF is rated for –40°C to +85°C operation and is AEC-Q100 qualified for automotive Grade I applications. This range covers under-hood ECU, transmission control, and ADAS modules where ambient temperatures exceed standard commercial limits. The device maintains ±1.5% threshold accuracy across this full range, verified per Analog Devices' automotive reliability test plan.
How does the SEL pin configure input polarity on the LTC2919IDDB-2.5#TRPBF?
The SEL pin on the LTC2919IDDB-2.5#TRPBF selects ADJ1/ADJ2 polarity via three states: tied to VCC (both positive), left open (ADJ1 positive / ADJ2 negative), or tied to GND (both negative). This enables detection of UV on positive rails, OV on positive rails, UV on negative rails, or OV on negative rails - all without external logic. The LTC2919IDDB-2.5#TRPBF datasheet Table 1 defines exact combinations and leakage limits (±5µA when open).
Can the LTC2919IDDB-2.5#TRPBF monitor a negative supply like –5V?
Yes, the LTC2919IDDB-2.5#TRPBF monitors negative supplies using its buffered 1V REF output to bias a resistive divider on the ADJ pin. When SEL = GND, ADJ1 and ADJ2 operate in negative polarity mode: a –5V rail is monitored by setting the divider to produce 0.5V at ADJ when –5V is present. The LTC2919IDDB-2.5#TRPBF then asserts OUT1 low if the –5V rail rises above –4.75V (OV) or falls toward ground (UV), enabling full fault coverage.
What reset timeout options does the LTC2919IDDB-2.5#TRPBF support?
The LTC2919IDDB-2.5#TRPBF offers three reset timeout modes: internal 200ms (TMR = GND), external capacitor-based (9ms/nF, e.g., 2.2nF → 20ms), or disabled comparator mode (TMR = VCC). In comparator mode, RST responds immediately to input faults with no delay. All modes are confirmed in the LTC2919IDDB-2.5#TRPBF Electrical Characteristics table (tRST(INT) = 140–280ms, tRST(EXT) = 15–27ms at CTMR = 2.2nF).
Is the LTC2919IDDB-2.5#TRPBF pin-compatible with other LTC2919 variants?
Yes, all LTC2919 DFN-10 variants including LTC2919CDDB-2.5#TRPBF, LTC2919HDDB-2.5#TRPBF, and LTC2919IDDB-3.3#TRPBF share identical pinout and footprint. The LTC2919IDDB-2.5#TRPBF differs only in temperature grade (–40°C to +85°C) and VCC UVLO threshold (2.175V), allowing drop-in replacement in existing layouts when upgrading from C-grade or changing supply voltage monitoring requirements.
LTC2919IDDB-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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LTC2919IDDB-2.5#TRPBF FAQ
1.How can I place an order for LTC2919IDDB-2.5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2919IDDB-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 LTC2919IDDB-2.5#TRPBF reliable?
The price and inventory of LTC2919IDDB-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 LTC2919IDDB-2.5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2919IDDB-2.5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2919IDDB-2.5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2919IDDB-2.5#TRPBF?
LTC2919IDDB-2.5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2919IDDB-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 LTC2919IDDB-2.5#TRPBF?
For technical support, including LTC2919IDDB-2.5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2919IDDB-2.5#TRPBF requirements.
6.How does Aetrix verify that LTC2919IDDB-2.5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2919IDDB-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 LTC2919IDDB-2.5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2919IDDB-2.5#TRPBF?
All LTC2919IDDB-2.5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2919IDDB-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 LTC2919IDDB-2.5#TRPBF part is unused and in its original packaging.
Return procedure for LTC2919IDDB-2.5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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