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Analog Devices Inc. LTC2912HDDB-1#TRMPBF
- Part No.:
- LTC2912HDDB-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2912HDDB-1#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
LTC2912HDDB-1#TRMPBF from Analog Devices is a precision single-channel UV/OV voltage monitor IC designed for high-reliability power supply supervision in harsh thermal environments. It features ±1.5% threshold accuracy, 29µA quiescent current, adjustable 6–14ms reset timeout (H-grade), and guaranteed operation down to VCC = 1V. Used in industrial servers and 48V telecom power systems to prevent false resets during voltage transients.
For engineers reviewing the LTC2912HDDB-1#TRMPBF datasheet, LTC2912HDDB-1#TRMPBF pinout, LTC2912HDDB-1#TRMPBF application, or LTC2912HDDB-1#TRMPBF equivalent, key selection criteria include H-grade temperature range (–40°C to 125°C), DFN-8 (3mm × 2mm) package with exposed GND pad, latch-controlled OV output, and VCC shunt regulator enabling direct operation from 12V/24V/48V supplies via external dropping resistor.
Technical Context
The LTC2912HDDB-1#TRMPBF implements dual comparator-based monitoring with internal low-pass filtering on VH and VL inputs to reject sub-500µs glitches, ensuring noise-immune reset assertion. Its independent UV and OV outputs are open-drain with weak internal pull-ups to VCC and strong active-low pull-downs (typ. 50Ω).
It integrates a 6.2–7.3V internal VCC shunt regulator with ±200mV load regulation, allowing operation from >6V supplies when paired with a series current-limiting resistor. The TMR pin supports capacitor-programmed timeout (9ms/nF) or bypass to VCC for immediate response, while the LATCH pin enables OV output latching behavior unique to the -1 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.3V to 6V direct; up to 48V via external series resistor using internal 6.2–7.3V shunt regulator |
| Threshold Accuracy | ±1.5% over full –40°C to 125°C range - ensures reliable trip points without recalibration across thermal extremes |
| Quiescent Current | 29µA typical - enables always-on monitoring in battery-backed or energy-constrained systems |
| UV/OV Timeout | 6–14ms (H-grade) set by CTMR capacitor - provides configurable reset pulse width for system settling |
| Input Glitch Immunity | Rejects transients <500µs at comparator input - eliminates false triggering from switching noise or ESD |
| Output Type | Open-drain UV and OV with weak VCC pull-up - supports wired-OR reset buses and level-shifting interfaces |
| VCC UVLO Threshold | 1.9–2.1V with 5–50mV hysteresis - guarantees clean power-on reset initiation before internal circuitry activates |
Pinout & Package
Package: 8-lead (3mm × 2mm) plastic DFN (DDB) with exposed GND pad (Pin 9), rated for –40°C to 125°C operation. Exposed pad must be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 8) | Power supply input | Accepts 2.3–6V directly; regulates higher voltages (e.g., 48V) via internal 6.2–7.3V shunt - requires series resistor if >6V |
| VH (Pin 7) | Undervoltage sense input | Triggers UV when voltage falls below 0.492–0.508V - connected to high-side divider tap for positive rail monitoring |
| VL (Pin 6) | Overvoltage sense input | Triggers OV when voltage rises above 0.492–0.508V - connected to low-side divider tap for same-rail monitoring |
| TMR (Pin 5) | Timeout timing control | Connects to GND via capacitor (CTMR ≥10pF) to set 6–14ms reset hold time; tie to VCC to disable timeout |
| LATCH (Pin 1) | OV latch clear/bypass | Pull high to clear latched OV state or bypass latch - enables UV-like timed behavior during fault recovery |
| UV (Pin 2) | Undervoltage logic output | Active-low open-drain output asserted during VH undervoltage - pulls low for programmed timeout after fault clears |
| OV (Pin 3) | Overvoltage logic output | Active-low open-drain output latched low during VL overvoltage - remains asserted until LATCH pin is pulled high |
| GND (Pin 4) | Ground reference | Primary signal and power return - exposed pad (Pin 9) is electrically tied to GND and must be soldered |
Key Features
| Feature | Design Value |
|---|---|
| H-grade temperature rating | –40°C to 125°C operating range with guaranteed parametric performance - suitable for under-hood automotive and industrial power modules |
| Adjustable UV/OV timeout | Capacitor-programmable 6–14ms delay (H-grade) - ensures sufficient reset pulse width for FPGA/CPU initialization without external timers |
| Glitch-immune comparators | Integrated low-pass filtering rejects transients <500µs - eliminates need for external RC filters and reduces BOM count |
| VCC shunt regulator | 6.2–7.3V regulated clamp with ±200mV load regulation - enables direct connection to 12V/24V/48V rails using only one external resistor |
| Latch-controlled OV output | OV remains latched low until LATCH pin is pulled high - provides fail-safe indication of overvoltage events in safety-critical systems |
| Low-power micropower design | 29µA typical ICC - allows continuous monitoring in always-on subsystems without impacting standby power budget |
Applications
| Industrial Server Power Sequencing | 48V Telecom Rectifier Monitoring |
|---|---|
|
Use Scenario: Supervising 3.3V and 12V rails in multi-board server chassis where sequencing faults must trigger immediate system halt. IC Role / Device Role / Timing Role: LTC2912HDDB-1#TRMPBF monitors each rail independently using resistor dividers; OV latch holds fault signal until manual reset via LATCH pin. Use Value: ±1.5% threshold accuracy prevents premature shutdown during nominal voltage ripple; H-grade operation survives chassis hot spots near VRMs. |
Use Scenario: Detecting overvoltage on 48V DC output of telecom rectifiers to protect downstream PoE switches and baseband units. IC Role / Device Role / Timing Role: LTC2912HDDB-1#TRMPBF operates from 48V via series resistor into VCC shunt regulator; OV output drives crowbar circuit through optocoupler. Use Value: Guaranteed operation down to VCC = 1V ensures reset assertion during brownout; glitch immunity avoids false trips from rectifier switching noise. |
| Automotive ADAS Domain Controller | Ruggedized Network Equipment |
|
Use Scenario: Monitoring 5V auxiliary supply in radar ECU exposed to under-hood temperatures up to 125°C ambient. IC Role / Device Role / Timing Role: LTC2912HDDB-1#TRMPBF senses 5V rail via 3-resistor divider; TMR capacitor sets 10ms reset pulse to meet ASIL-B timing requirements. Use Value: DFN-8 package with exposed pad provides low θJA = 55°C/W - maintains junction temp within spec under sustained 125°C ambient. |
Use Scenario: Supervising dual 3.3V/2.5V supplies in outdoor wireless access points subject to wide thermal cycling and lightning-induced transients. IC Role / Device Role / Timing Role: LTC2912HDDB-1#TRMPBF deployed per rail with separate VH/VL inputs; open-drain outputs wire-OR into single system RESET line. Use Value: 29µA quiescent current minimizes self-heating in sealed enclosures; ±1.5% accuracy ensures consistent trip points across –40°C to 85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912HDDB-2#TRMPBF | Includes DIS pin for OV/UV output disable; no LATCH pin; identical H-grade temp range and DFN-8 package | Required for margining applications where outputs must be disabled during voltage calibration sequences | Select LTC2912HDDB-2#TRMPBF when system-level voltage margining or dynamic enable/disable of reset signals is needed |
| LTC2913HDE#TRPBF | Dual independent UV/OV monitor in 10-lead DFN; ±1.5% accuracy; 30µA ICC; same –40°C to 125°C rating | Monitors two separate rails simultaneously (e.g., 3.3V + 12V) with independent timeouts and outputs | Choose LTC2913HDE#TRPBF when space-constrained designs require dual-rail supervision without doubling component count |
Compared with LTC2912HDDB-1#TRMPBF, the -2 variant adds output disable capability but removes latching, while the LTC2913HDE offers dual-channel monitoring in slightly larger footprint - both retain H-grade reliability but serve distinct system-level supervision architectures.
Availability
LTC2912HDDB-1#TRMPBF is available at Aetrix Electronics and suitable for industrial servers, telecom rectifiers, automotive ADAS controllers, and ruggedized network equipment requiring stable component supply across extended temperature ranges.
Supply support for LTC2912HDDB-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 industrial, automotive, communications, and healthcare markets since 1965.
The LTC2912 family delivers precision, low-power voltage supervision for mission-critical power systems - engineered specifically for robustness in high-noise, wide-temperature, and high-reliability applications.
FAQ
What is the maximum input voltage the LTC2912HDDB-1#TRMPBF can tolerate on its VCC pin?
The LTC2912HDDB-1#TRMPBF VCC pin has an absolute maximum rating of 6V when used as a direct supply input. For higher voltages such as 12V, 24V, or 48V, the internal 6.2–7.3V shunt regulator must be used with an external series current-limiting resistor to keep input current ≤10mA. Exceeding 6V without current limiting risks violating terminal current ratings.
How does the LATCH pin function on the LTC2912HDDB-1#TRMPBF?
On the LTC2912HDDB-1#TRMPBF, the LATCH pin (Pin 1) controls the OV output behavior: when held low, OV latches low upon overvoltage detection and stays asserted until LATCH is pulled high (≥1.2V). When pulled high, OV behaves like UV - asserting low only for the programmed timeout period after fault clearance.
Can the LTC2912HDDB-1#TRMPBF monitor negative voltages?
No, the LTC2912HDDB-1#TRMPBF is designed exclusively for positive voltage monitoring. Its VH and VL inputs operate referenced to GND and accept only 0V to 7.5V. For negative rail supervision, Analog Devices recommends the LTC2909, which supports dedicated negative voltage inputs alongside positive rails.
What is the minimum capacitor value required on the TMR pin of the LTC2912HDDB-1#TRMPBF?
The TMR pin of the LTC2912HDDB-1#TRMPBF requires a minimum 10pF capacitor to GND to ensure stable timeout operation. Using less than 10pF may cause erratic or shortened reset pulses. For precise timing, select NP0/C0G ceramic capacitors with tight tolerance (±5%) and low leakage to maintain accuracy across temperature.
Does the LTC2912HDDB-1#TRMPBF provide separate UV and OV outputs?
Yes, the LTC2912HDDB-1#TRMPBF provides two independent open-drain outputs: UV (Pin 2) asserts low during undervoltage conditions on VH, and OV (Pin 3) asserts low during overvoltage conditions on VL. Both outputs have weak internal pull-ups to VCC and can be wire-OR'd with other reset sources in system-level designs.
LTC2912HDDB-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:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC2912HDDB-1#TRMPBF FAQ
1.How can I place an order for LTC2912HDDB-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912HDDB-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 LTC2912HDDB-1#TRMPBF reliable?
The price and inventory of LTC2912HDDB-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 LTC2912HDDB-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912HDDB-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912HDDB-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912HDDB-1#TRMPBF?
LTC2912HDDB-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912HDDB-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 LTC2912HDDB-1#TRMPBF?
For technical support, including LTC2912HDDB-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912HDDB-1#TRMPBF requirements.
6.How does Aetrix verify that LTC2912HDDB-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912HDDB-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 LTC2912HDDB-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912HDDB-1#TRMPBF?
All LTC2912HDDB-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912HDDB-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 LTC2912HDDB-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912HDDB-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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