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Analog Devices Inc. LTC2917CDDB-B1#TRMPBF
- Part No.:
- LTC2917CDDB-B1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2917CDDB-B1#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,855
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Product details
Overview
LTC2917CDDB-B1#TRMPBF from Analog Devices (formerly Linear Technology) is a precision voltage supervisor IC with 27 selectable reset thresholds, windowed watchdog timer, and internal timing control - designed for reliable power-up/power-down sequencing in automotive and industrial systems. It operates from 1.5V to 5.5V supply, consumes only 30μA quiescent current, guarantees ±1.5% threshold accuracy over –40°C to 125°C, and supports 1.8V system monitoring with manual reset disabled (LTC2917 variant).
For engineers reviewing the LTC2917CDDB-B1#TRMPBF datasheet, LTC2917CDDB-B1#TRMPBF pinout, LTC2917CDDB-B1#TRMPBF application, or LTC2917CDDB-B1#TRMPBF equivalent, this page delivers verified functional identity, exact DFN-10 package mapping, confirmed B1-series windowed watchdog behavior, validated 9-threshold selection logic, and real-world design meaning for reset timeout, glitch immunity, and VM input impedance.
Technical Context
The LTC2917CDDB-B1#TRMPBF implements a dual-stage supervision architecture: a high-accuracy comparator monitors VM against one of nine nominal voltages (12V to ADJ/0.5V), with tolerance selection via TOL pin (–5%/–10%/–15%), while a windowed watchdog timer enforces both upper (1.6s typical) and lower (50ms typical) timing boundaries on WDI falling edges. Its internal 6.2V shunt regulator enables direct operation from supplies up to 12V when used with an external series resistor.
Reset assertion is guaranteed down to VCC ≥ 0.8V, with glitch filtering ensuring immunity to transients <150μs at 5% threshold deviation. The device uses three-state SEL1/SEL2/TOL inputs (no external resistors required) and provides open-drain RST output with programmable timeout via RT pin capacitor or fixed 200ms mode (RT tied to VCC).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.5V to 5.5V direct operation; up to 12V with external series resistor and internal 6.2V shunt regulation |
| Threshold Accuracy | ±1.5% over full temperature range (–40°C to 125°C), enabling robust margining against supply tolerances |
| Quiescent Current | 30μA typical - allows integration into always-on subsystems without significant battery drain |
| Watchdog Type | Windowed (B1 version): requires WDI falling edge within 50ms–1.6s window to prevent false reset |
| Reset Timeout | 200ms fixed (RT = VCC); adjustable from 16ms to 25ms with 2.2nF capacitor; 400μs if RT open |
| VM Input Impedance | 0.5–8MΩ depending on SEL configuration - minimizes loading on monitored rail |
| Operating Temp | 0°C to 70°C (C-grade), validated for automotive cabin and industrial control ambient conditions |
Pinout & Package
Package: 10-lead (3mm × 2mm) plastic DFN with exposed pad (pin 11, optional GND connection). Pinout matches LTC2917 series DFN footprint and is not compatible with MSOP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for all internal circuits; exposed pad may be connected here for thermal relief |
| TOL | Tolerance select input | Three-state pin (VCC/GND/open) setting –5%, –10%, or –15% hysteresis band around selected threshold |
| SEL2 | Voltage threshold select bit | One of two three-state inputs selecting 9 nominal VM thresholds (e.g., 1.8V, 3.3V, ADJ) |
| SEL1 | Voltage threshold select bit | Second three-state input completing 3-bit encoding of monitor voltage; no external components needed |
| VM | Monitored supply input | High-impedance comparator input; accepts direct connection to rail or external divider for ADJ mode |
| RST | Open-drain reset output | Asserts low during fault or timeout; requires external pull-up; supports wired-OR with other supervisors |
| RT | Reset timeout control | Capacitor-to-GND sets timeout (9ms/nF); tie to VCC for 200ms; open for ~400μs |
| WT | Watchdog timeout control | Capacitor-to-GND sets upper boundary (72ms/nF); tie to VCC for 1.6s; tie to GND to disable |
| WDI | Watchdog input | Falling-edge-triggered (B1 only); must fall within windowed period to avoid reset assertion |
| VCC | Power supply input | Accepts 1.5–5.5V directly; >5.7V requires series resistor due to internal 6.2V shunt regulator |
Key Features
| Feature | Design Value |
|---|---|
| 27 Selectable Thresholds | 9 nominal voltages × 3 tolerances (–5%/–10%/–15%) - eliminates need for external resistor networks |
| Windowed Watchdog (B1) | Enforces both minimum (50ms) and maximum (1.6s) WDI edge intervals - prevents lockup from stuck or too-fast toggling |
| Glitch Immunity | Rejects transients <150μs at 5% threshold deviation - avoids spurious resets during load switching or EMI events |
| Guaranteed RST at Low VCC | RST asserts reliably even when VCC drops to 0.8V - ensures fail-safe behavior during brownout |
| Adjustable Threshold Mode | ADJ setting (SEL1=SEL2=TOL=GND) configures VM as high-Z input for custom trip point using external divider |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 5V microcontroller supply in under-hood ECU exposed to 125°C ambient and load dump transients. IC Role / Device Role / Timing Role: Voltage supervisor with windowed watchdog enforcing firmware liveness and preventing runaway code after voltage sag. Use Value: ±1.5% threshold accuracy ensures reset occurs only outside 5V±10% spec; 125°C rating eliminates derating; glitch filtering rejects alternator noise. |
Use Scenario: Supervises 3.3V FPGA configuration rail in modular PLC backplane with hot-swap capability. IC Role / Device Role / Timing Role: Dual-function supervisor providing power-valid signal and watchdog reset for safety-critical logic. Use Value: 200ms fixed reset timeout aligns with FPGA configuration time; open-drain RST supports wired-OR across multiple modules. |
| Medical Infusion Pump Controller | Telecom Base Station Power Shelf |
Use Scenario: Ensures safe shutdown of motor drivers when 1.8V digital supply falls below specification during battery depletion. IC Role / Device Role / Timing Role: Precision threshold detector with ADJ mode configured for 1.8V±5% monitoring and 20ms reset delay. Use Value: 30μA quiescent current extends battery life; ±1.5% accuracy prevents premature shutdown near end-of-life voltage. |
Use Scenario: Monitors 12V auxiliary rail feeding fan controllers and sensors in distributed telecom power system. IC Role / Device Role / Timing Role: High-voltage supervisor using internal 6.2V shunt regulator and external series resistor for direct 12V interface. Use Value: Eliminates need for external LDO; 12V threshold with –5% tolerance triggers reset before fan stall; 10-lead DFN saves board space. |
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 voltages or watchdog; SOT23-3 package | Suitable only for single-rail monitoring without timing supervision | Select when cost-sensitive, space-constrained designs require basic reset only - no threshold flexibility or watchdog needed |
| TPS3808G18DBVR | Fixed 1.8V threshold; adjustable watchdog (non-windowed); 6-pin SOT23 | Lacks multi-threshold selection and tolerance adjustment; lower temp grade (–40°C to 125°C) | Choose for simpler 1.8V-only systems needing watchdog but not windowed timing or wide voltage coverage |
Compared with MAX6326UT29D3+T and TPS3808G18DBVR, the LTC2917CDDB-B1#TRMPBF offers unique configurability: 27 thresholds via 3-pin encoding, windowed watchdog for higher reliability, and DFN-10 packaging optimized for thermal performance in automotive environments - making it irreplaceable where flexible, robust, and compact supervision is required.
Availability
LTC2917CDDB-B1#TRMPBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC I/O modules, medical infusion pump controllers, and telecom base station power shelves requiring stable component supply with guaranteed long-term availability.
Supply support for LTC2917CDDB-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 acquired Linear Technology in 2017 and maintains full product support, datasheet documentation, and application engineering resources for the LTC portfolio.
The LTC2917 series belongs to Linear's precision power supervision product line, engineered specifically for mission-critical automotive, industrial, and medical systems demanding guaranteed reset behavior across extreme temperature and voltage transients.
FAQ
What is the function of the TOL pin on the LTC2917CDDB-B1#TRMPBF?
The TOL pin on the LTC2917CDDB-B1#TRMPBF selects the tolerance band (–5%, –10%, or –15%) applied to the nominal voltage threshold set by SEL1 and SEL2. It is a three-state input: connect to VCC for –5%, leave open for –10%, or tie to GND for –15%. This feature enables precise margining against supply specifications without external components - a capability exclusive to the LTC2917 (not present in LTC2918).
Does the LTC2917CDDB-B1#TRMPBF support windowed watchdog functionality?
Yes, the LTC2917CDDB-B1#TRMPBF is a B1-version device and fully supports windowed watchdog operation. It requires WDI falling edges to occur strictly between the lower boundary (50ms typical) and upper boundary (1.6s typical); violation of either bound triggers RST assertion. This behavior is confirmed in the datasheet's timing diagrams and electrical characteristics tables for B versions.
What is the maximum supply voltage the LTC2917CDDB-B1#TRMPBF can tolerate on its VCC pin?
The LTC2917CDDB-B1#TRMPBF has an absolute maximum VCC rating of 5.7V for direct connection. However, its internal 6.2V shunt regulator allows operation from higher supplies (e.g., 12V) when a series current-limiting resistor is used. Without that resistor, exceeding 5.7V risks violating the ±5mA terminal current limit - so 5.7V is the practical max for direct-supply use.
Can the LTC2917CDDB-B1#TRMPBF monitor a 1.2V supply?
Yes, the LTC2917CDDB-B1#TRMPBF supports 1.2V monitoring via its selectable threshold matrix: configure SEL1=GND and SEL2=VCC to select the 1.2V nominal threshold, then set TOL=VCC for –5% (1.14V), TOL=open for –10% (1.08V), or TOL=GND for –15% (1.02V). All thresholds are guaranteed accurate to ±1.5% over temperature.
Is the LTC2917CDDB-B1#TRMPBF pin-compatible with the LTC2917CMS-B1#TRPBF?
No, the LTC2917CDDB-B1#TRMPBF (10-lead DFN, 3mm × 2mm) is not pin-compatible with the LTC2917CMS-B1#TRPBF (10-lead MSOP, 3mm × 3mm). While both share identical pin functions and signal assignments, their physical footprints, thermal pads, and soldering profiles differ - requiring PCB layout changes for substitution. The DFN offers superior thermal resistance (θJA = 43°C/W vs. 200°C/W for MSOP).
LTC2917CDDB-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LTC2917CDDB-B1#TRMPBF FAQ
1.How can I place an order for LTC2917CDDB-B1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2917CDDB-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 LTC2917CDDB-B1#TRMPBF reliable?
The price and inventory of LTC2917CDDB-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 LTC2917CDDB-B1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2917CDDB-B1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2917CDDB-B1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2917CDDB-B1#TRMPBF?
LTC2917CDDB-B1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2917CDDB-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 LTC2917CDDB-B1#TRMPBF?
For technical support, including LTC2917CDDB-B1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2917CDDB-B1#TRMPBF requirements.
6.How does Aetrix verify that LTC2917CDDB-B1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2917CDDB-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 LTC2917CDDB-B1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2917CDDB-B1#TRMPBF?
All LTC2917CDDB-B1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2917CDDB-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 LTC2917CDDB-B1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2917CDDB-B1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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