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Analog Devices Inc. LTC2917CDDB-B1#TRPBF
- Part No.:
- LTC2917CDDB-B1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2917CDDB-B1#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,547
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Product details
Overview
LTC2917CDDB-B1#TRPBF from Analog Devices (formerly Linear Technology) is a precision voltage supervisor IC with 27 selectable reset thresholds, windowed watchdog timer, and manual reset disable - designed for high-reliability embedded power monitoring. It operates from 1.5V to 5.5V supply, consumes only 30μA quiescent current, guarantees ±1.5% threshold accuracy over –40°C to 85°C, and supports 1.8V system monitoring in automotive control units.
For engineers reviewing the LTC2917CDDB-B1#TRPBF datasheet, LTC2917CDDB-B1#TRPBF pinout, LTC2917CDDB-B1#TRPBF application, or LTC2917CDDB-B1#TRPBF equivalent, this page delivers verified functional identity, confirmed DFN-10 (3mm × 2mm) package mapping, validated 10-pin terminal roles, exact B1-version windowed watchdog behavior, and two manufacturer-confirmed alternative parts with documented tolerance and feature differences.
Technical Context
The LTC2917CDDB-B1#TRPBF implements a dual-stage comparator architecture with internal reference trimming and glitch-filtered VM input detection. Its three-state SEL1/SEL2/TOL inputs configure one of nine nominal voltages (12V to ADJ 0.5V) and select –5%/–10%/–15% tolerance bands, enabling precise margining without external resistors.
As a B1 variant, it integrates a windowed watchdog requiring falling-edge timing between tWDL = 50ms and tWDU = 1.6s on WDI - rejecting both too-fast and too-slow toggles - while its RT and WT pins support capacitor-adjustable reset (200ms internal) and watchdog timeouts without external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.5V to 5.5V - powers directly from low-voltage rails; shunt regulation enables operation up to 12V with series resistor |
| Threshold Accuracy | ±1.5% over –40°C to 85°C - ensures reliable trip point across industrial temperature range without calibration |
| Quiescent Current | 30μA typical - minimizes standby power in battery-backed or energy-sensitive systems |
| Reset Timeout | 200ms internal (RT tied to VCC) - provides sufficient hold time for microcontroller initialization sequences |
| Watchdog Window | tWDL = 50ms / tWDU = 1.6s (B1 version) - prevents false resets from jitter or software hangs while rejecting stuck-at states |
| VM Input Impedance | 0.5–8MΩ - enables high-impedance monitoring of regulated supplies without loading |
| Operating Temp | –40°C to 85°C (I-grade) - qualified for under-hood automotive and industrial control environments |
Pinout & Package
Package: 10-lead (3mm × 2mm) plastic DFN with exposed pad (pin 11, optional GND connection). RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for all internal circuits and RST output sink |
| TOL | Tolerance selection input | Three-state pin setting –5% (VCC), –10% (open), or –15% (GND) hysteresis band for VM threshold |
| SEL2 | Voltage threshold selector | Three-state input selecting nominal monitor voltage (e.g., 1.8V when open/open) |
| SEL1 | Voltage threshold selector | Three-state input co-determining one of nine preset thresholds with SEL2 |
| VM | Monitor input | High-impedance comparator input accepting direct connection to supply rail or adjustable divider |
| RST | Open-drain reset output | Asserts low during undervoltage or watchdog fault; requires external pull-up to logic rail |
| RT | Reset timeout control | Capacitor-connected pin setting external timeout (9ms/nF); tied to VCC = 200ms fixed |
| WT | Watchdog timeout control | Capacitor-connected pin setting upper watchdog boundary (72ms/nF); tied to VCC = 1.6s fixed |
| WDI | Watchdog input | Falling-edge-triggered input monitored within windowed timeout; ignored if WT = GND |
| VCC | Power supply input | Accepts 1.5–5.5V directly; includes internal 6.2V shunt regulator for >5.7V operation |
Key Features
| Feature | Design Value |
|---|---|
| 27 Selectable Thresholds | Nine nominal voltages × three tolerances enable precise match to 1.0V–12V rails without external resistors |
| Windowed Watchdog (B1) | Rejects both premature and delayed WDI edges - critical for safety-critical firmware validation |
| Glitch Immunity | Hardware filtering blocks transients <100μs at 5% over-threshold - eliminates false resets from load noise |
| Guaranteed RST at VCC ≥ 0.8V | Ensures valid reset assertion during brown-out conditions before full supply stabilization |
| Adjustable ADJ Mode | Direct VM connection supports custom thresholds down to 0.5V with ±1.5% accuracy over temperature |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring 5V sensor supply in engine bay where temperature swings from –40°C to 125°C and EMI induces voltage spikes. IC Role / Device Role / Timing Role: Voltage supervisor asserting RST during undervoltage events and validating MCU watchdog activity via WDI. Use Value: ±1.5% threshold accuracy and windowed watchdog prevent spurious resets during cranking transients while ensuring firmware liveness. | Use Scenario: Supervising 3.3V FPGA configuration rail in programmable logic controller with strict uptime requirements. IC Role / Device Role / Timing Role: Reset generator with 200ms internal timeout and 1.6s windowed watchdog enforcing deterministic boot sequence. Use Value: Eliminates need for external RC timing components and rejects both stuck and oscillating WDI signals in noisy factory environments. |
| Medical Infusion Pump Controller | Telecom Base Station Power Management |
Use Scenario: Validating 1.8V microcontroller core supply in battery-powered infusion device requiring fail-safe shutdown. IC Role / Device Role / Timing Role: Low-power (30μA) supervisor detecting brown-out and initiating controlled pump stop via RST assertion. Use Value: Guaranteed operation down to 0.8V VCC ensures reset remains active during deep discharge, preventing unsafe motor operation. | Use Scenario: Monitoring redundant 12V backplane supplies in 48V telecom rectifier system with hot-swap capability. IC Role / Device Role / Timing Role: High-voltage supervisor using internal 6.2V shunt regulator and external series resistor for direct 12V input. Use Value: Enables single-chip supervision without auxiliary LDO, reducing BOM count and PCB area in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2917IDDB-B1#TRPBF | Same functionality and pinout; rated for –40°C to 85°C (I-grade) vs. C-grade (0°C to 70°C) of LTC2917CDDB-B1#TRPBF | Required for extended temperature deployments (e.g., outdoor telecom, industrial enclosures) | Select when operating ambient exceeds 70°C or requires full industrial temp qualification |
| LTC2917HDDB-B1#TRPBF | Same functionality and pinout; rated for –40°C to 125°C (H-grade) with higher thermal resistance (θJA = 43°C/W) | Required for under-hood automotive or high-temperature process control | Select for AEC-Q100-qualified environments or continuous operation above 85°C |
Compared with LTC2917CDDB-B1#TRPBF, the I-grade and H-grade alternatives offer identical electrical performance and windowed watchdog behavior but extend operational temperature range - making them drop-in replacements for thermal-hardened designs without layout or firmware changes.
Availability
LTC2917CDDB-B1#TRPBF is available at Aetrix Electronics and suitable for automotive control systems, industrial PLCs, medical infusion pumps, and telecom base station power management requiring stable component supply across production lifecycles.
Supply support for LTC2917CDDB-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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC2917 family was engineered specifically for robust power-supply monitoring in safety-critical embedded systems - emphasizing guaranteed threshold accuracy, glitch immunity, and windowed watchdog reliability over wide temperature ranges.
FAQ
What is the function of the TOL pin on the LTC2917CDDB-B1#TRPBF?
The TOL pin on the LTC2917CDDB-B1#TRPBF selects the tolerance band for the voltage monitor threshold: VCC sets –5%, open sets –10%, and GND sets –15%. This allows precise margining against supply variations without external components. The LTC2917CDDB-B1#TRPBF uses this pin to configure hysteresis relative to the selected nominal voltage (e.g., 3.3V ±10%).
Does the LTC2917CDDB-B1#TRPBF support windowed watchdog functionality?
Yes, the LTC2917CDDB-B1#TRPBF is a B1-version device and implements full windowed watchdog behavior: WDI falling edges must occur strictly between tWDL = 50ms and tWDU = 1.6s, or RST asserts. This prevents both premature timeouts and missed watchdog pulses. The LTC2917CDDB-B1#TRPBF datasheet confirms this behavior applies to all B1 variants.
What is the minimum VCC voltage required for valid RST assertion on the LTC2917CDDB-B1#TRPBF?
The LTC2917CDDB-B1#TRPBF guarantees RST assertion for VCC ≥ 0.8V, ensuring reliable reset signaling even during severe brown-out conditions. Below 0.8V, RST behavior is unspecified. This specification is explicitly guaranteed in the Absolute Maximum Ratings table and confirmed across the –40°C to 85°C operating range for the LTC2917CDDB-B1#TRPBF.
Can the LTC2917CDDB-B1#TRPBF monitor a 12V supply directly?
Yes, the LTC2917CDDB-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) is required between the 12V source and VCC to keep input current ≤5mA. The VM pin then monitors the 12V rail directly, with SEL1/SEL2 set to VCC/VCC for 12V nominal threshold. This configuration is validated in the LTC2917CDDB-B1#TRPBF typical application circuits.
What package type does the LTC2917CDDB-B1#TRPBF use, and is the exposed pad required?
The LTC2917CDDB-B1#TRPBF uses a 10-lead (3mm × 2mm) plastic DFN package with an exposed pad (pin 11). The exposed pad may be left unconnected or tied to GND - no thermal or electrical requirement mandates connection. Thermal characterization data (θJA = 43°C/W) assumes optional GND connection, but the LTC2917CDDB-B1#TRPBF functions fully with pad floating per manufacturer recommendations.
LTC2917CDDB-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
LTC2917CDDB-B1#TRPBF FAQ
1.How can I place an order for LTC2917CDDB-B1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2917CDDB-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 LTC2917CDDB-B1#TRPBF reliable?
The price and inventory of LTC2917CDDB-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 LTC2917CDDB-B1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2917CDDB-B1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2917CDDB-B1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2917CDDB-B1#TRPBF?
LTC2917CDDB-B1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2917CDDB-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 LTC2917CDDB-B1#TRPBF?
For technical support, including LTC2917CDDB-B1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2917CDDB-B1#TRPBF requirements.
6.How does Aetrix verify that LTC2917CDDB-B1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2917CDDB-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 LTC2917CDDB-B1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2917CDDB-B1#TRPBF?
All LTC2917CDDB-B1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2917CDDB-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 LTC2917CDDB-B1#TRPBF part is unused and in its original packaging.
Return procedure for LTC2917CDDB-B1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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