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Analog Devices Inc. LTC2917IDDB-B1#TRMPBF
- Part No.:
- LTC2917IDDB-B1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2917IDDB-B1#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,814
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Product details
Overview
LTC2917IDDB-B1#TRMPBF from Analog Devices (formerly Linear Technology) is a precision voltage supervisor IC with 27 selectable reset thresholds, windowed watchdog timer, and operation from 1.5V to 5.5V supply. It features ±1.5% threshold accuracy over –40°C to +85°C, 30μA quiescent current, and supports 12V/5V/3.3V/1.8V/1.5V/1.2V/1V/ADJ monitoring in automotive control systems.
For engineers reviewing the LTC2917IDDB-B1#TRMPBF datasheet, LTC2917IDDB-B1#TRMPBF pinout, LTC2917IDDB-B1#TRMPBF application, or LTC2917IDDB-B1#TRMPBF equivalent, key selection criteria include internal windowed watchdog timing (tWDL = 50ms / tWDU = 1.6s), tolerance-selectable thresholds (–5%/–10%/–15%), glitch-immune reset assertion (tUV = 10–150μs), and DFN-10 (3mm × 2mm) package compatibility with high-density PCB layouts.
Technical Context
The LTC2917IDDB-B1#TRMPBF implements a dual-stage comparator architecture with internal reference division and three-state input decoding for threshold selection. Its windowed watchdog logic requires falling edges on WDI within both lower (50ms) and upper (1.6s) boundaries - a reliability enhancement over standard watchdogs.
Reset timeout is configurable via RT pin: open (400μs), tied to VCC (200ms), or capacitor-adjusted (9ms/nF). The VM input accepts direct connection to monitored rails or external resistive dividers for ADJ mode (0.5V reference), with guaranteed RST assertion down to VCC ≥ 0.8V and VM ≤ threshold −5%.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.5V to 5.5V - supports direct connection to common logic rails without external regulation |
| Threshold Accuracy | ±1.5% over –40°C to +85°C - ensures reliable trip point across full industrial temperature range |
| Quiescent Current | 30μA typical - enables battery-backed or low-power always-on supervision |
| Watchdog Type | Windowed (B1 version) - requires WDI falling edge between 50ms and 1.6s to prevent false resets |
| Reset Timeout | 200ms internal (RT = VCC) - provides sufficient hold time for microcontroller initialization |
| VM Input Impedance | 0.5–8MΩ - minimizes loading on monitored supply or divider network |
| Glitch Immunity | tUV = 10–150μs - rejects transients shorter than specified duration at threshold crossing |
Pinout & Package
Package: 10-Lead (3mm × 2mm) Plastic DFN with exposed pad (optional GND connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for all internal circuitry and external bypass capacitors |
| TOL | Tolerance select input | Three-state pin setting –5% (VCC), –10% (open), or –15% (GND) hysteresis band |
| SEL2 | Nominal voltage select | Three-state pin selecting one of nine thresholds (e.g., 1.8V when open/open) |
| SEL1 | Nominal voltage select | Three-state pin completing threshold selection matrix with SEL2 and TOL |
| VM | Monitored voltage input | High-impedance comparator input accepting direct rail or resistive divider connection |
| RST | Open-drain reset output | Asserts low during undervoltage or watchdog fault; requires external pull-up |
| RT | Reset timeout control | Configures internal timer: open (400μs), VCC (200ms), or capacitor-adjusted (9ms/nF) |
| WT | Watchdog timeout control | Configures windowed watchdog: open (3.2ms), VCC (1.6s), or capacitor-adjusted (72ms/nF) |
| WDI | Watchdog input | Falling-edge-triggered input; failure to toggle within window asserts RST |
| VCC | Power supply input | Operates as direct supply (≤5.5V) or shunt-regulated input (up to 6.2V with series resistor) |
Key Features
| Feature | Design Value |
|---|---|
| 27 Selectable Thresholds | Combines 9 nominal voltages (12V–ADJ) × 3 tolerances (–5%/–10%/–15%) for precise system margining |
| Windowed Watchdog Timer | Prevents spurious resets by requiring WDI activity within both lower (50ms) and upper (1.6s) bounds |
| Glitch-Filtered Reset Assertion | Rejects supply transients <150μs duration, eliminating false triggers near threshold crossings |
| Guaranteed RST at Low VCC | Asserts valid reset signal even when VCC drops to 0.8V - critical for brown-out detection |
| 6.2V Internal Shunt Regulator | Enables direct 12V automotive supply connection using only a series current-limiting resistor |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring 5V microcontroller supply in under-hood ECU exposed to –40°C to +125°C ambient. IC Role / Device Role / Timing Role: Voltage supervisor with –10% tolerance and windowed watchdog ensuring fail-safe MCU reset during voltage sags or software lockup. Use Value: ±1.5% threshold accuracy prevents nuisance resets across temperature; 1.6s watchdog upper bound aligns with firmware safety cycle timing. | Use Scenario: Supervising 3.3V FPGA configuration rail in modular PLC backplane with hot-swap capability. IC Role / Device Role / Timing Role: Dual-function supervisor providing power-on reset (200ms) and runtime watchdog (1.6s) with glitch immunity against bus noise. Use Value: 30μA quiescent current minimizes standby power; open-drain RST allows wired-OR of multiple supervisors on shared reset bus. |
| Medical Infusion Pump Controller | Telecom Base Station Power Management |
Use Scenario: Validating 1.8V DSP core supply in battery-powered infusion pump with strict safety certification requirements. IC Role / Device Role / Timing Role: Precision supervisor with ADJ mode (0.5V reference) and –5% tolerance for tight-margin 1.8V rail monitoring. Use Value: Guaranteed RST assertion at VCC ≥ 0.8V ensures reset validity during deep brown-out; 10-Lead DFN enables compact layout in space-constrained enclosure. | Use Scenario: Monitoring 12V intermediate bus in 48V telecom rectifier with transient-heavy environment. IC Role / Device Role / Timing Role: High-voltage supervisor using internal 6.2V shunt regulator and external series resistor for direct 12V connection. Use Value: Eliminates need for external LDO or Zener; ±1.5% accuracy ensures compliance with GR-63-CORE voltage margining requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT29D3+T | Fixed 2.93V threshold; no selectable tolerance or windowed watchdog | Suitable only for single-rail monitoring without dynamic margining or enhanced watchdog reliability | Select when simplicity and cost outweigh need for configurability and windowed timing |
| TPS3808G33DBVR | Fixed 3.3V threshold; standard (non-windowed) watchdog; 2.9V–6.0V supply range | Lacks tolerance selection and ADJ mode; requires external components for 12V operation | Choose for TI-based designs where ecosystem compatibility and lower unit cost are prioritized |
Compared with MAX6326UT29D3+T and TPS3808G33DBVR, the LTC2917IDDB-B1#TRMPBF offers unique configurability across 27 thresholds, true windowed watchdog timing, and integrated shunt regulation - making it optimal for multi-rail, safety-critical, or high-voltage industrial applications where flexibility and reliability are non-negotiable.
Availability
LTC2917IDDB-B1#TRMPBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and telecom base station power management requiring stable component supply across extended temperature ranges.
Supply support for LTC2917IDDB-B1#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2917 product line was designed specifically for high-reliability voltage supervision in harsh environments - emphasizing precision threshold accuracy, glitch immunity, and extended temperature operation up to 125°C.
FAQ
What is the operating temperature range for the LTC2917IDDB-B1#TRMPBF?
The LTC2917IDDB-B1#TRMPBF is rated for –40°C to +85°C operation (industrial grade), with guaranteed performance including ±1.5% threshold accuracy and functional windowed watchdog timing across this full range. Its DFN-10 package provides thermal efficiency suitable for convection-cooled industrial enclosures.
How does the windowed watchdog function differ between LTC2917IDDB-B1#TRMPBF and standard watchdog supervisors?
The LTC2917IDDB-B1#TRMPBF implements a true windowed watchdog requiring WDI falling edges to occur strictly between tWDL = 50ms and tWDU = 1.6s - unlike standard watchdogs that only enforce an upper timeout. This prevents premature resets from rapid toggling and missed resets from stalled firmware, enhancing system reliability in safety-critical applications.
Can the LTC2917IDDB-B1#TRMPBF monitor a 12V supply directly without external components?
Yes - the LTC2917IDDB-B1#TRMPBF integrates a 6.2V shunt regulator on VCC. To monitor 12V, connect it through a series current-limiting resistor (e.g., 11kΩ for 12V automotive) to keep VCC pin current ≤5mA. No external LDO or Zener is required, simplifying high-voltage supervision.
What are the reset timeout options for the LTC2917IDDB-B1#TRMPBF, and how are they configured?
The LTC2917IDDB-B1#TRMPBF offers three reset timeout modes: ~400μs (RT open), ~200ms (RT tied to VCC), or adjustable (0.01ms–100ms) using capacitor CRT from RT to GND (9ms/nF scaling). All modes maintain ±1.5% timing accuracy over temperature, enabling precise alignment with microcontroller boot sequences.
Does the LTC2917IDDB-B1#TRMPBF support adjustable threshold monitoring, and how is it implemented?
Yes - the LTC2917IDDB-B1#TRMPBF supports ADJ mode (0.5V internal reference) via VM pin. Connect VM to a resistive divider from the monitored supply to set any threshold; for example, a 1.8V rail uses R1=49.9kΩ/R2=1.15MΩ to yield 0.5V at nominal. Threshold accuracy remains ±1.5% of the programmed value, supporting custom voltage rails beyond the 9 fixed options.
LTC2917IDDB-B1#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:
- 1
- Voltage - Threshold:
- 27 Selectable Threshold Combinations
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LTC2917IDDB-B1#TRMPBF FAQ
1.How can I place an order for LTC2917IDDB-B1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2917IDDB-B1#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 LTC2917IDDB-B1#TRMPBF reliable?
The price and inventory of LTC2917IDDB-B1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2917IDDB-B1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2917IDDB-B1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2917IDDB-B1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2917IDDB-B1#TRMPBF?
LTC2917IDDB-B1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2917IDDB-B1#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 LTC2917IDDB-B1#TRMPBF?
For technical support, including LTC2917IDDB-B1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2917IDDB-B1#TRMPBF requirements.
6.How does Aetrix verify that LTC2917IDDB-B1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2917IDDB-B1#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 LTC2917IDDB-B1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2917IDDB-B1#TRMPBF?
All LTC2917IDDB-B1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2917IDDB-B1#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 LTC2917IDDB-B1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2917IDDB-B1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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