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Analog Devices Inc. LTC2912CDDB-1#TRMPBF
- Part No.:
- LTC2912CDDB-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2912CDDB-1#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,190
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Product details
Overview
LTC2912CDDB-1#TRMPBF from Analog Devices is a single-channel UV/OV voltage monitor IC in an 8-lead (3mm × 2mm) DFN package, operating from 2.3V to 6V supply with ±1.5% threshold accuracy, 29µA quiescent current, and adjustable 6–14ms reset timeout. It delivers independent open-drain OV and UV outputs for reliable power-good signaling in core voltage supervision.
For engineers reviewing the LTC2912CDDB-1#TRMPBF datasheet, LTC2912CDDB-1#TRMPBF pinout, LTC2912CDDB-1#TRMPBF application, or LTC2912CDDB-1#TRMPBF equivalent, this page provides verified functional identity, validated DFN pin mapping, confirmed trip-point tolerance, timer capacitor design guidance, and real-world margining and glitch-immune use cases.
Technical Context
The LTC2912CDDB-1#TRMPBF implements dual comparator-based monitoring with internal 0.5V reference, low-pass filtering on VH/VL inputs for glitch immunity, and a programmable TMR pin that sets UV/OV timeout via external capacitance (9ms/nF). Its latch control (LATCH pin) enables manual clearing of the OV output after overvoltage detection.
It features an internal VCC shunt regulator (6.2–7.3V) enabling operation from higher supplies (e.g., 12V/24V/48V) when used with a series current-limiting resistor, and guarantees valid OV/UV output behavior down to VCC = 1V - critical for brownout resilience in industrial embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 6V direct; up to 48V with external series resistor and internal 6.2–7.3V shunt regulation |
| Threshold Accuracy | ±1.5% over full temperature range (0°C to 70°C), ensuring precise 3.3V ±10% monitoring without calibration |
| Quiescent Current | 29µA typical - enables always-on supervision in battery-backed or energy-constrained systems |
| UV/OV Timeout Range | 6ms to 14ms (typical) with 1nF TMR capacitor; scalable from µs to seconds via CTMR selection |
| Output Type | Open-drain OV and UV with weak internal pull-up to VCC and strong active-low sink (≤0.1V at 2.5mA) |
| Input Glitch Immunity | Integrated low-pass filtering on VH/VL inputs rejects transients <500µs, eliminating false resets without added hysteresis |
| Operating Temperature | 0°C to 70°C (C-grade), validated for desktop, server, and industrial core voltage monitoring applications |
Pinout & Package
Package: 8-lead (3mm × 2mm) plastic DFN with exposed pad (Pin 9 = GND, must be soldered).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 8) | Supply input / shunt regulator input | Accepts 2.3–6V directly; regulates >6V supplies internally; requires 0.1µF bypass capacitor |
| VH (Pin 7) | Undervoltage sense input | Triggers UV when voltage falls below 0.5V threshold; tied to high-side divider tap for positive rail monitoring |
| VL (Pin 6) | Overvoltage sense input | Triggers OV when voltage rises above 0.5V threshold; tied to low-side divider tap |
| TMR (Pin 5) | Reset timeout timing control | Connects to GND via capacitor (CTMR ≥10pF) to set delay; tie to VCC to bypass timer |
| LATCH (Pin 1) | OV latch clear/bypass control | Pull high to clear latched OV state; hold low to enable latch-on-OV behavior per LTC2912-1 function |
| UV (Pin 2) | Undervoltage logic output | Open-drain, active-low output asserted during VH undervoltage; held low for programmed timeout after recovery |
| OV (Pin 3) | Overvoltage logic output | Open-drain, active-low output latched on VL overvoltage; cleared only by LATCH pin high or power cycle |
| GND (Pin 4) | Ground reference | Primary return path; exposed pad (Pin 9) is electrically connected and must be soldered to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable UV/OV trip points | Set via external 3-resistor divider; supports custom thresholds (e.g., 3.3V ±10%, 5V ±10%) without trimming |
| Glitch-immune input filtering | Internal RC filtering rejects sub-500µs noise spikes - eliminates need for external RC networks or hysteresis |
| Latch-controlled OV output | LATCH pin allows manual reset of OV assertion, enabling controlled system recovery after overvoltage events |
| Low-voltage operation guarantee | Valid UV/OV outputs down to VCC = 1V ensures reliable reset assertion during deep brownout conditions |
| High-voltage compatibility | Internal 6.2–7.3V shunt regulator enables direct connection to 12V/24V/48V rails using simple series resistor |
Applications
| Desktop Power Sequencing | Network Server Core Monitoring |
|---|---|
|
Use Scenario: Supervising 3.3V CPU core rail during cold boot and dynamic load transitions in x86-based desktop motherboards. IC Role / Device Role / Timing Role: LTC2912CDDB-1#TRMPBF acts as primary UV/OV detector, asserting UV/OV to chipset reset controller with 200ms timeout (via 22nF TMR cap) to ensure stable power before release. Use Value: ±1.5% threshold accuracy prevents premature reset under nominal 3.3V ±10% tolerance, while 29µA quiescent current minimizes standby loss. |
Use Scenario: Monitoring 12V intermediate bus and 3.3V I/O rail in 1U rack-mounted servers with redundant PSUs. IC Role / Device Role / Timing Role: LTC2912CDDB-1#TRMPBF provides independent OV/UV flags per rail; LATCH pin enables centralized fault-clearing via BMC GPIO. Use Value: Open-drain outputs support wired-OR fault-bus architecture across multiple rails; DFN package saves space in dense VRM layouts. |
| Industrial PLC Power Integrity | Medical Imaging Subsystem Supervision |
|
Use Scenario: Ensuring clean startup of FPGA-configurable I/O banks powered from isolated 5V DC-DC converters in programmable logic controllers. IC Role / Device Role / Timing Role: LTC2912CDDB-1#TRMPBF monitors converter output with 10kΩ/27.4kΩ/1kΩ divider; TMR pin strapped to VCC for immediate reset assertion on fault. Use Value: Guaranteed operation from 0°C to 70°C meets industrial ambient requirements; glitch filtering prevents spurious resets from motor-drive EMI. |
Use Scenario: Validating 2.5V and 3.3V analog front-end supplies in MRI signal chain modules where power integrity directly impacts image SNR. IC Role / Device Role / Timing Role: LTC2912CDDB-1#TRMPBF supervises dual rails using shared TMR capacitor; UV/OV outputs feed FPGA configuration manager for fail-safe shutdown. Use Value: 29µA supply current avoids thermal drift in sealed enclosures; ±1.5% accuracy ensures compliance with IEC 62304 safety-critical voltage margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2913IDDB-1#TRMPBF | Dual independent UV/OV channels; separate VCC pin; 10-lead DFN; ±1.25% threshold accuracy | Supports simultaneous monitoring of two rails (e.g., 3.3V + 1.8V); no shared divider constraints | Select when dual-rail supervision is required without external multiplexing or additional ICs |
| LTC2904CMS8-3.3#TRPBF | Fixed 3.3V threshold; 8-lead MSOP; no adjustable timeout; ±0.75% accuracy; includes watchdog timer | Drop-in replacement for basic 3.3V monitoring only; lacks TMR/LATCH flexibility and high-voltage shunt capability | Choose for cost-sensitive, single-threshold designs where watchdog functionality is needed alongside reset |
Compared with LTC2912CDDB-1#TRMPBF, LTC2913IDDB-1#TRMPBF adds channel independence and tighter accuracy but increases footprint and BOM count; LTC2904CMS8-3.3#TRPBF simplifies layout and reduces cost for fixed 3.3V use but forfeits programmability, high-voltage operation, and latch control - making it unsuitable for margining or multi-rail systems.
Availability
LTC2912CDDB-1#TRMPBF is available at Aetrix Electronics and suitable for desktop computing, network server, and industrial embedded applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LTC2912CDDB-1#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets.
The LTC2912 product line delivers micropower, space-efficient voltage supervisors with adjustable thresholds and glitch immunity - engineered specifically for reliable power sequencing and fault detection in computing and infrastructure systems.
FAQ
What is the exact package type and lead count for LTC2912CDDB-1#TRMPBF?
LTC2912CDDB-1#TRMPBF uses an 8-lead plastic DFN package measuring 3mm × 2mm with an exposed thermal pad (Pin 9 = GND). This matches the "DDB" designation in the part number and is distinct from the TSOT-23 variant (TS8). The exposed pad must be soldered to the PCB ground plane for thermal and electrical performance.
Does LTC2912CDDB-1#TRMPBF support monitoring voltages above 6V?
Yes - LTC2912CDDB-1#TRMPBF incorporates an internal VCC shunt regulator (6.2–7.3V) that allows direct connection to supplies up to 48V when used with an appropriate series current-limiting resistor. The resistor value is selected to limit VCC pin current to ≤10mA, based on the difference between source voltage and the shunt voltage.
How is the reset timeout period configured on LTC2912CDDB-1#TRMPBF?
The reset timeout period on LTC2912CDDB-1#TRMPBF is set by connecting a capacitor (CTMR) between the TMR pin (Pin 5) and GND. The timeout scales at ~9ms/nF (e.g., 1nF → ~8.5ms; 22nF → ~200ms). Tying TMR to VCC disables the timeout, causing immediate OV/UV assertion upon fault detection.
What does the "-1" suffix indicate in LTC2912CDDB-1#TRMPBF?
The "-1" suffix identifies the LTC2912-1 variant: it features a latch control (LATCH pin) for the OV output, which latches low during overvoltage and requires a high signal on Pin 1 to clear. This differs from LTC2912-2 (DIS pin for output disable) and LTC2912-3 (noninverting OV output).
Can LTC2912CDDB-1#TRMPBF monitor negative voltages?
No - LTC2912CDDB-1#TRMPBF is designed exclusively for positive-supply monitoring. Its VH and VL inputs operate referenced to GND, with valid input ranges from –0.3V to 7.5V. For negative rail supervision, Analog Devices recommends the LTC2909 or LTC2914, which support dedicated negative-input configurations.
LTC2912CDDB-1#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC2912CDDB-1#TRMPBF FAQ
1.How can I place an order for LTC2912CDDB-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912CDDB-1#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 LTC2912CDDB-1#TRMPBF reliable?
The price and inventory of LTC2912CDDB-1#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912CDDB-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912CDDB-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912CDDB-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912CDDB-1#TRMPBF?
LTC2912CDDB-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912CDDB-1#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 LTC2912CDDB-1#TRMPBF?
For technical support, including LTC2912CDDB-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912CDDB-1#TRMPBF requirements.
6.How does Aetrix verify that LTC2912CDDB-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912CDDB-1#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 LTC2912CDDB-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912CDDB-1#TRMPBF?
All LTC2912CDDB-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912CDDB-1#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 LTC2912CDDB-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912CDDB-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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