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Analog Devices Inc. LTC2917HDDB-B1#TRPBF
- Part No.:
- LTC2917HDDB-B1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2917HDDB-B1#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2917HDDB-B1#TRPBF from Analog Devices (formerly Linear Technology) is a high-temperature voltage supervisor IC with 27 selectable reset thresholds, windowed watchdog timer, and internal timing control. It operates from 1.5V to 5.5V supply, consumes 30μA quiescent current, guarantees ±1.5% threshold accuracy over –40°C to 125°C, and supports 1.8V system monitoring in automotive control units.
For engineers reviewing the LTC2917HDDB-B1#TRPBF datasheet, LTC2917HDDB-B1#TRPBF pinout, LTC2917HDDB-B1#TRPBF application, or LTC2917HDDB-B1#TRPBF equivalent, this page delivers verified functional specifications, thermal-grade package details, windowed watchdog timing behavior, and direct alternative part comparisons for industrial and automotive power sequencing designs.
Technical Context
The LTC2917HDDB-B1#TRPBF implements a dual-stage comparator architecture with glitch-filtered VM input, internal 200ms/400μs reset timers, and B1-version windowed watchdog logic requiring falling-edge WDI transitions within both upper (1.6s typical) and lower (50ms typical) time boundaries. Its TOL pin selects –5%/–10%/–15% tolerance bands for nine nominal voltages (12V to ADJ), while SEL1/SEL2 configure threshold selection without external resistors.
It integrates a 6.2V shunt regulator on VCC for operation up to 12V supplies (with series resistor), guarantees RST assertion down to VCC ≥ 0.8V, and features open-drain RST output with 0.15V VOL at 2.5mA load. The DFN-10 (3mm × 2mm) package includes exposed pad for thermal management and supports guaranteed operation to 125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.5V to 5.5V direct; up to 12V via internal 6.2V shunt regulator with series resistor |
| Reset Threshold Accuracy | ±1.5% over full –40°C to 125°C range - ensures reliable trip point margining against supply tolerance |
| Quiescent Current | 30μA typical - enables low-power battery-backed or always-on monitoring in automotive ECUs |
| Watchdog Type | Windowed (B1 version) - requires WDI falling edges between 50ms and 1.6s to prevent false resets in safety-critical systems |
| Reset Timeout Options | Internal 200ms (RT = VCC) or 400μs (RT open); external adjustable via CRT capacitor (9ms/nF) |
| Operating Temperature | –40°C to +125°C (H-grade) - qualified for under-hood automotive applications per AEC-Q100 stress requirements |
| Package | 10-lead (3mm × 2mm) DFN with exposed pad - provides 43°C/W θJA for thermal reliability in compact layouts |
Pinout & Package
Package: 10-Lead (3mm × 2mm) Plastic DFN with exposed pad (pin 11), rated for TJMAX = 125°C and θJA = 43°C/W. Exposed pad may be left unconnected or tied to PCB GND for improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for all internal circuits; must be low-impedance connection to system ground plane |
| TOL | Tolerance select input (LTC2917 only) | Three-state pin setting –5% (VCC), –10% (open), or –15% (GND); defines hysteresis band around nominal threshold |
| SEL2 | Threshold select input | Three-state pin (VCC/GND/open) used with SEL1 to select one of nine nominal monitor voltages (e.g., 1.8V, 3.3V, ADJ) |
| SEL1 | Threshold select input | Three-state pin (VCC/GND/open) used with SEL2 to define VM trip point; no external resistors required |
| VM | Monitor input | High-impedance (0.5–8MΩ) input comparing against selected threshold; supports ADJ mode with external divider |
| RST | Open-drain reset output | Asserts low when VM < threshold; holds low for timeout period; requires external pull-up to logic rail |
| RT | Reset timeout control | Capacitor-connected pin sets tRST = 9ms/nF; tied to VCC = 200ms; open = 400μs |
| WT | Watchdog timeout control | Capacitor-connected pin sets tWDU = 72ms/nF; tied to VCC = 1.6s; open = 3.2ms; GND disables watchdog |
| WDI | Watchdog input | Falling-edge-triggered (B1 version); must toggle within 50ms–1.6s window to avoid RST assertion |
| VCC | Power supply input | Accepts 1.5–5.5V directly; >5.7V requires series resistor due to integrated 6.2V shunt regulator |
Key Features
| Feature | Design Value |
|---|---|
| 27 Selectable Thresholds | Nine nominal voltages (12V–ADJ) × three tolerances (–5%/–10%/–15%) - eliminates external resistor networks and reduces BOM count |
| Windowed Watchdog (B1) | Enforces both minimum (50ms) and maximum (1.6s) WDI edge intervals - prevents lockup from stuck or overly fast firmware toggling |
| Glitch Immunity | Combined 10μs–150μs tUV filtering + reset timeout - rejects transients shorter than 10μs even near threshold crossing |
| High-Temperature Operation | Guaranteed functionality at TJ = 125°C - validated for engine control modules, transmission controllers, and ADAS domain ECUs |
| Low-Voltage Validity | RST asserted down to VCC = 0.8V - ensures robust power-up sequencing in brownout conditions before core logic stabilizes |
| Shunt Regulator Integration | 6.2V VCC clamp enables direct 12V battery interface with single series resistor - removes need for external LDO or Zener |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Sequencing |
|---|---|
Use Scenario: Monitoring 5V microcontroller supply in under-hood ECU subject to load dump, cold cranking, and thermal cycling. IC Role / Device Role / Timing Role: Voltage supervisor with windowed watchdog ensuring MCU remains responsive during transient faults; asserts RST if firmware hangs or supply dips below 4.5V (5V–10%). Use Value: Prevents unsafe operation by forcing controlled reset when VM falls outside ±10% band for >200ms, while rejecting sub-15μs noise spikes from ignition systems. |
Use Scenario: Coordinating startup of FPGA, ADC, and communication ICs in modular I/O rack with 3.3V/2.5V rails. IC Role / Device Role / Timing Role: Single-chip supervisor generating synchronized reset pulses across multiple voltage domains using wired-OR RST outputs. Use Value: Eliminates discrete RC networks and reduces board space by 60% versus dual-supervisor solutions while maintaining ±1.5% threshold stability over –40°C to 85°C ambient. |
| Optical Transceiver Module | Medical Diagnostic Imaging System |
Use Scenario: Ensuring stable 1.8V bias supply for laser diode driver in SFP+ module operating at 85°C case temperature. IC Role / Device Role / Timing Role: High-temp supervisor monitoring ADJ-mode VM input set to 1.8V ±5%, with manual reset disabled and watchdog enabled for firmware health check. Use Value: Guarantees ±1.5% trip accuracy at 125°C junction temp, preventing false resets during thermal soak tests while supporting 1.6s watchdog timeout aligned with DSP boot sequence. |
Use Scenario: Supervising 12V analog front-end supply in MRI gradient amplifier where fault response time must be deterministic. IC Role / Device Role / Timing Role: Precision voltage monitor with fixed 12V–5% threshold (SEL1=VCC, SEL2=VCC, TOL=VCC) and 200ms reset timeout for fail-safe shutdown. Use Value: Delivers 11.04V trip point with ±1.5% tolerance (10.8–11.4V range), ensuring reset occurs before analog signal distortion exceeds clinical safety limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.3V threshold; no windowed watchdog; 1.8–6.0V supply; 1.5μA IQ | Lacks multi-threshold flexibility and B1-style watchdog windowing; suited for cost-sensitive, single-rail consumer devices | Select when only 3.3V monitoring is needed and ultra-low IQ (<2μA) is prioritized over configurability |
| MAX6369KA29+T | Fixed 2.93V threshold; windowed watchdog; 1.0–5.5V supply; 12μA IQ; SO-8 package | Smaller threshold selection set; no TOL/SEL configuration; SO-8 footprint incompatible with DFN-10 layout | Choose for legacy SO-8 designs needing windowed watchdog but unable to re-layout for DFN |
Compared with LTC2917HDDB-B1#TRPBF, TPS3808G33DBVR offers lower quiescent current but sacrifices threshold programmability and windowed watchdog reliability, while MAX6369KA29+T provides comparable watchdog safety but lacks the 27-threshold flexibility and high-temp DFN packaging critical for automotive deployment.
Availability
LTC2917HDDB-B1#TRPBF is available at Aetrix Electronics and suitable for automotive control systems, industrial PLCs, optical networking equipment, and medical imaging subsystems requiring stable component supply across extended temperature ranges.
Supply support for LTC2917HDDB-B1#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, Inc. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, and automotive safety systems.
The LTC2917 product line was developed by Linear Technology (acquired by ADI in 2017) to deliver configurable, high-reliability voltage supervision for mission-critical embedded systems operating in harsh thermal and electrical environments.
FAQ
What does the "B1" suffix indicate in LTC2917HDDB-B1#TRPBF?
The "B1" suffix denotes the windowed watchdog variant of the LTC2917 family. Unlike A1 versions, LTC2917HDDB-B1#TRPBF requires WDI falling edges to occur strictly between its lower boundary (50ms typical) and upper boundary (1.6s typical) to avoid reset assertion - a feature essential for high-integrity automotive and industrial firmware monitoring.
Can LTC2917HDDB-B1#TRPBF monitor a 12V supply directly?
Yes, LTC2917HDDB-B1#TRPBF can monitor a 12V supply using its internal 6.2V shunt regulator on the VCC pin. A series current-limiting resistor (e.g., 11kΩ for 12V battery) must be placed between the 12V source and VCC to keep input current ≤5mA, enabling direct high-voltage operation without external regulators.
How is the reset timeout configured on LTC2917HDDB-B1#TRPBF?
LTC2917HDDB-B1#TRPBF supports three reset timeout configurations: tying RT to VCC yields ~200ms, leaving RT open yields ~400μs, and connecting an external capacitor CRT to GND sets tRST = 9ms/nF (e.g., 2.2nF → 20ms). All modes maintain ±1.5% accuracy over –40°C to 125°C.
Does LTC2917HDDB-B1#TRPBF support adjustable threshold monitoring?
Yes, LTC2917HDDB-B1#TRPBF supports adjustable threshold monitoring via the ADJ mode (SEL1=GND, SEL2=GND), where VM connects to a resistive divider tapping the monitored supply. The internal comparator references 0.5V, allowing precise trip points like 1.8V or 2.5V with ±1.5% accuracy across temperature.
What is the function of the exposed pad on the DFN package of LTC2917HDDB-B1#TRPBF?
The exposed pad (pin 11) on LTC2917HDDB-B1#TRPBF's DFN package serves as a thermal and electrical ground connection. It may be left unconnected or soldered to a PCB ground plane to improve thermal dissipation (θJA = 43°C/W) and reduce junction temperature rise in high-ambient automotive applications.
LTC2917HDDB-B1#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:
- 1
- Voltage - Threshold:
- 27 Selectable Threshold Combinations
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LTC2917HDDB-B1#TRPBF FAQ
1.How can I place an order for LTC2917HDDB-B1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2917HDDB-B1#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 LTC2917HDDB-B1#TRPBF reliable?
The price and inventory of LTC2917HDDB-B1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2917HDDB-B1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2917HDDB-B1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2917HDDB-B1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2917HDDB-B1#TRPBF?
LTC2917HDDB-B1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2917HDDB-B1#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 LTC2917HDDB-B1#TRPBF?
For technical support, including LTC2917HDDB-B1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2917HDDB-B1#TRPBF requirements.
6.How does Aetrix verify that LTC2917HDDB-B1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2917HDDB-B1#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 LTC2917HDDB-B1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2917HDDB-B1#TRPBF?
All LTC2917HDDB-B1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2917HDDB-B1#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 LTC2917HDDB-B1#TRPBF part is unused and in its original packaging.
Return procedure for LTC2917HDDB-B1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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