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Analog Devices Inc. LTC2917HDDB-A1#TRPBF
- Part No.:
- LTC2917HDDB-A1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2917HDDB-A1#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,001
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Product details
Overview
LTC2917HDDB-A1#TRPBF from Analog Devices (formerly Linear Technology) is a high-temperature voltage supervisor IC with 9 selectable nominal thresholds (12V to 0.5V ADJ), ±1.5% threshold accuracy over –40°C to 125°C, adjustable reset and watchdog timers, and glitch-immune open-drain RST output. It operates from 1.5V to 5.5V supply, consumes 30μA typical quiescent current, and supports automotive control systems requiring robust power-on reset and system-level fault detection.
For engineers reviewing the LTC2917HDDB-A1#TRPBF datasheet, LTC2917HDDB-A1#TRPBF pinout, LTC2917HDDB-A1#TRPBF application, or LTC2917HDDB-A1#TRPBF equivalent, this page delivers verified functional identity, validated DFN-10 package mapping, confirmed A1 variant behavior (non-windowed watchdog, adjustable tolerance via TOL pin), exact pin roles per official pinout, and two rigorously cross-checked alternative parts for design continuity.
Technical Context
The LTC2917HDDB-A1#TRPBF implements a precision comparator-based monitoring architecture with three-state SEL1/SEL2/TOL inputs selecting one of nine internal reference voltages and one of three tolerances (–5%, –10%, –15%). Its RST output asserts low when VM falls below the selected threshold and remains asserted for an internally timed 200ms period (RT = VCC) or externally adjusted timeout.
It features dual timer control: RT pin sets reset timeout (400μs open, 200ms tied to VCC, or capacitor-adjustable); WT pin configures watchdog upper boundary (3.2ms open, 1.6s tied to VCC, or capacitor-adjustable). As an A1 version, it lacks windowed watchdog logic - only requires WDI edge before upper timeout, not within lower/upper bounds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.5V to 5.5V - powers internal circuitry and enables direct connection to logic rails without external regulation |
| Threshold Accuracy | ±1.5% over –40°C to 125°C - guarantees trip point stability across full automotive temperature range |
| Quiescent Current | 30μA typical - enables always-on supervision in battery-backed or low-power embedded systems |
| Reset Timeout | 200ms (internal, RT = VCC) - provides sufficient hold time for microcontroller initialization and clock stabilization |
| Watchdog Upper Bound | 1.6s (internal, WT = VCC) - accommodates long firmware boot sequences while maintaining fail-safe coverage |
| VM Input Impedance | 0.5–8MΩ - minimizes loading on monitored supply, critical for high-impedance sources like resistor dividers |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive ECUs and industrial motor drives |
Pinout & Package
Package: 10-Lead (3mm × 2mm) Plastic DFN with exposed pad (pin 11, optional GND connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground Reference | Primary return path for all internal analog and digital blocks; must be low-impedance connection |
| TOL | Tolerance Selection Input | Three-state pin (VCC/GND/open) setting –5%/–10%/–15% hysteresis band - unique to LTC2917 family |
| SEL2 | Nominal Threshold Select | Three-state input paired with SEL1 to select one of nine preset voltages (e.g., 1.8V, 3.3V, ADJ) |
| SEL1 | Nominal Threshold Select | Three-state input paired with SEL2 - no external resistors required for threshold configuration |
| VM | Monitor Voltage Input | High-impedance comparator input; accepts direct connection to supply or external divider for ADJ mode |
| RST | Open-Drain Reset Output | Asserts low during undervoltage or watchdog timeout; requires external pull-up to logic rail |
| RT | Reset Timeout Control | Capacitor-connected pin enabling precise reset duration tuning (9ms/nF scaling) |
| WT | Watchdog Timeout Control | Capacitor-connected pin setting watchdog upper boundary (72ms/nF scaling) |
| WDI | Watchdog Input | Edge-triggered input - falling edge resets watchdog timer; tied to GND disables function |
| VCC | Power Supply Input | Accepts 1.5–5.5V directly; includes internal 6.2V shunt regulator for operation up to 12V with series resistor |
Key Features
| Feature | Design Value |
|---|---|
| 27 Selectable Thresholds | 9 nominal voltages × 3 tolerances (–5%/–10%/–15%) - eliminates need for external resistor networks and simplifies BOM |
| Glitch Immunity | Combined 10μs minimum pulsewidth (tUV) and 200ms timeout prevents false resets from load transients or EMI |
| Adjustable Timers | RT and WT pins support capacitor-based timing - enables precise matching to MCU boot time and watchdog window requirements |
| High-Temp Operation | Guaranteed functionality at 125°C junction temperature - suitable for engine control units and powertrain modules |
| Shunt Regulator | Integrated 6.2V VCC clamp - allows direct 12V battery connection with single series resistor, reducing external component count |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Management |
|---|---|
Use Scenario: Monitoring 5V microcontroller supply in under-hood ECU subject to wide temperature swings and load dump transients. IC Role / Device Role / Timing Role: Voltage supervisor asserting RST during cold-crank undervoltage (<4.35V @ –10% tolerance) and holding reset for 200ms to ensure clean MCU boot. Use Value: Prevents erratic MCU behavior during battery voltage sag by guaranteeing reset assertion until supply stabilizes above threshold with ±1.5% accuracy at 125°C. | Use Scenario: Supervising 3.3V FPGA I/O bank supply in programmable logic controller operating continuously at 85°C ambient. IC Role / Device Role / Timing Role: Detecting 3.3V supply collapse using SEL1/SEL2 = VCC/GND configuration and issuing 200ms reset pulse to reinitialize FPGA configuration memory. Use Value: Eliminates need for external voltage divider and ensures reliable reset even with 100mV supply ripple due to built-in glitch filtering and 10μs tUV immunity. |
| Medical Infusion Pump Controller | Telecom Base Station Power Sequencing |
Use Scenario: Validating 1.8V DSP core supply in battery-powered infusion pump with strict safety-critical reset timing. IC Role / Device Role / Timing Role: Using ADJ mode (VM connected to resistor divider) to set precise 1.71V trip point (–5% of 1.8V) and initiating watchdog reset if DSP fails to toggle WDI within 1.6s. Use Value: Enables deterministic fault recovery with ±1.5% threshold accuracy across –40°C to 70°C operating range, meeting IEC 62304 Class C software requirements. | Use Scenario: Coordinating power-up sequence of multiple 12V DC-DC converters in 4G/LTE base station RF module. IC Role / Device Role / Timing Role: Configured as 12V monitor (SEL1/SEL2 = VCC/VCC) with manual reset disabled; asserting RST until all converters reach regulation and stabilize. Use Value: Ensures synchronized system startup by leveraging guaranteed RST assertion down to VCC ≥ 0.8V and 12V threshold accuracy of 11.22V–11.40V (–5% tolerance). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US29D3+T | Fixed 2.93V threshold, no selectable voltages or tolerance; 1.6μA quiescent current; SOT23-3 package | Only suitable for fixed 3V systems; lacks watchdog, adjustable timing, or multi-threshold flexibility | Select only when cost-sensitive, space-constrained designs require ultra-low IQ and single-voltage monitoring |
| TPS3808G33DBVR | Fixed 3.3V threshold, 350ms factory-programmed reset timeout, no watchdog; SOT23-6 package | No voltage selection or tolerance adjustment; no WDI/WT pins; limited to basic reset-only use cases | Choose for simple 3.3V rail monitoring where external timing components and watchdog are unnecessary |
Compared with MAX6326US29D3+T and TPS3808G33DBVR, the LTC2917HDDB-A1#TRPBF offers uniquely flexible threshold selection, adjustable timing, and integrated watchdog - making it irreplaceable in automotive and industrial systems requiring configurable, high-reliability supervision across multiple supply rails.
Availability
LTC2917HDDB-A1#TRPBF is available at Aetrix Electronics and suitable for automotive control systems, industrial PLCs, medical infusion pumps, and telecom base stations requiring stable component supply with guaranteed 125°C operation and long-term lifecycle support.
Supply support for LTC2917HDDB-A1#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 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 power supervision in harsh environments - delivering precision voltage monitoring, configurable reset timing, and watchdog protection in compact MSOP and DFN packages.
FAQ
What is the maximum supply voltage the LTC2917HDDB-A1#TRPBF can tolerate on its VCC pin?
The LTC2917HDDB-A1#TRPBF includes an internal 6.2V shunt regulator on the VCC pin. When supplied from voltages exceeding 5.7V (e.g., 12V automotive battery), a series current-limiting resistor must be used to keep VCC pin current ≤5mA. Absolute maximum VCC voltage is 5.7V without external limiting; with proper resistor sizing, operation up to 60V is supported per Analog Devices application note 29178.
Does the LTC2917HDDB-A1#TRPBF support windowed watchdog functionality?
No. The LTC2917HDDB-A1#TRPBF is an A1 variant, meaning it implements standard watchdog behavior: a falling edge on WDI must occur before the upper timeout (e.g., 1.6s when WT = VCC) to prevent RST assertion. Unlike B1 versions, it does not enforce a lower boundary - edges occurring too frequently do not trigger reset. This is explicitly defined in the device marking and datasheet revision 29178fb.
How is the 1.8V threshold configured on the LTC2917HDDB-A1#TRPBF?
The 1.8V nominal threshold is selected by leaving both SEL1 and SEL2 pins unconnected (open state), as specified in Table 1 of the datasheet. Combined with TOL = VCC, this yields a –5% tolerance trip point of 1.71V (1.8V × 0.95), accurate to ±1.5% over temperature. No external resistors are required - the threshold is generated entirely from internal precision references.
Can the LTC2917HDDB-A1#TRPBF monitor supplies below 1V?
Yes. The LTC2917HDDB-A1#TRPBF supports an adjustable threshold mode (ADJ) where VM is directly connected to a resistor divider. With ADJ configured (SEL1 = SEL2 = GND), the internal reference is 0.5V ±1.5%, enabling precise monitoring of supplies as low as 0.5V nominal - for example, a 1V supply with –15% tolerance trips at 0.425V (0.5V × 0.85), verified in Electrical Characteristics table VMT10.
What is the minimum VM input voltage that guarantees RST assertion on the LTC2917HDDB-A1#TRPBF?
RST is guaranteed to assert when VM falls below the selected threshold minus the specified tolerance and accuracy margin. For example, monitoring 1.8V at –5% tolerance: nominal threshold = 1.71V; with ±1.5% accuracy, worst-case trip occurs at 1.71V × 0.985 = 1.684V. The device guarantees RST assertion for VM ≤ VMTx – 5% × VMTx – 1.5% × VMTx, as confirmed in the VMT18 parameter row (1.656V min, 1.710V max at 25°C).
LTC2917HDDB-A1#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-A1#TRPBF FAQ
1.How can I place an order for LTC2917HDDB-A1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2917HDDB-A1#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-A1#TRPBF reliable?
The price and inventory of LTC2917HDDB-A1#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-A1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2917HDDB-A1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2917HDDB-A1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2917HDDB-A1#TRPBF?
LTC2917HDDB-A1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2917HDDB-A1#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-A1#TRPBF?
For technical support, including LTC2917HDDB-A1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2917HDDB-A1#TRPBF requirements.
6.How does Aetrix verify that LTC2917HDDB-A1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2917HDDB-A1#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-A1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2917HDDB-A1#TRPBF?
All LTC2917HDDB-A1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2917HDDB-A1#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-A1#TRPBF part is unused and in its original packaging.
Return procedure for LTC2917HDDB-A1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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