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Analog Devices Inc. LTC2912HDDB-1#TRPBF
- Part No.:
- LTC2912HDDB-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2912HDDB-1#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,928
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Product details
Overview
LTC2912HDDB-1#TRPBF from Analog Devices is a single-channel UV/OV voltage monitor IC with latch-controlled open-drain OV output, ±1.5% threshold accuracy, 29µA quiescent current, and operation from 2.3V to 6V (or higher via internal 6.2V shunt regulator). It supports industrial temperature range (–40°C to +125°C) in an 8-lead (3mm × 2mm) DFN package and is used for reliable power-good monitoring in high-reliability embedded systems.
For engineers reviewing the LTC2912HDDB-1#TRPBF datasheet, LTC2912HDDB-1#TRPBF pinout, LTC2912HDDB-1#TRPBF application, or LTC2912HDDB-1#TRPBF equivalent, key selection criteria include guaranteed UV/OV assertion at VCC ≥ 1V, adjustable timeout via TMR capacitor, glitch-immune VH/VL inputs, and H-grade thermal performance for automotive and industrial power rails.
Technical Context
The LTC2912HDDB-1#TRPBF implements dual comparator-based monitoring with independent VH (overvoltage sense) and VL (undervoltage sense) inputs, each featuring low-pass filtering to reject sub-500µs transients. Its internal oscillator drives a programmable timeout timer tied to the TMR pin, enabling precise reset pulse width control from 6ms to >10s using external capacitance.
It integrates a 6.2V shunt regulator on VCC, allowing direct connection to 12V/24V/48V supplies when paired with a series current-limiting resistor. The LATCH pin enables OV output latching behavior-low-active and persistent until cleared-distinguishing it from the -2 (disable) and -3 (noninverting OV) variants.
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 6.2V shunt regulation |
| UV/OV Threshold Accuracy | ±1.5% over –40°C to +125°C - ensures tight trip-point tolerance without calibration |
| Quiescent Current | 29µA typical - enables always-on monitoring in battery-backed or low-power systems |
| Reset Timeout Range | 6ms to 14ms per nF on TMR pin (H-grade), scalable to seconds with larger capacitors |
| Input Glitch Immunity | Rejects transients <500µs duration - eliminates false resets from switching noise or load dumps |
| VCC Undervoltage Lockout | Activates below 1.9V–2.1V with 5–50mV hysteresis - guarantees clean UV assertion during brownout |
| Output Type | Open-drain UV and OV - supports wired-OR reset buses and level-shifting across voltage domains |
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-regulated rail | Accepts 2.3–6V directly; regulates higher voltages (e.g., 12V/24V) via internal 6.2V shunt; bypass with ≥0.1µF |
| VH (Pin 7) | Undervoltage sense input | Triggers UV when voltage falls below 0.5V threshold; filtered to reject brief glitches |
| VL (Pin 6) | Overvoltage sense input | Triggers OV when voltage rises above 0.5V threshold; same filtering as VH |
| TMR (Pin 5) | Timeout timer control | Connects to GND via capacitor (≥10pF) to set reset pulse width; tie to VCC to bypass timer |
| LATCH (Pin 1) | OV latch clear/bypass | Pull high to clear latched OV output; hold low to enable persistent OV assertion after fault |
| UV (Pin 2) | Undervoltage logic output | Open-drain, active-low; asserts low during VH undervoltage and holds for timeout period |
| OV (Pin 3) | Overvoltage logic output | Open-drain, active-low; latches low on VL overvoltage until LATCH is pulled high |
| 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 |
|---|---|
| Guaranteed operation down to VCC = 1V | Ensures valid UV/OV assertion during deep brownout - critical for fail-safe system shutdown |
| Adjustable reset timeout with disable | TMR pin allows precise pulse-width tuning (ms to seconds); tying to VCC disables timeout entirely |
| Power supply glitch immunity | Internal RC filtering rejects transients <500µs - avoids spurious resets without adding hysteresis error |
| H-grade temperature range (–40°C to +125°C) | Validated for under-hood automotive, industrial PLC, and telecom power module applications |
| Low 29µA quiescent current | Enables permanent monitoring in energy-constrained systems without measurable battery drain |
Applications
| Automotive Engine Control Unit (ECU) Power Monitoring | Industrial PLC I/O Module Supply Supervision |
|---|---|
Use Scenario: Monitors 5V microcontroller supply in engine bay where voltage sags and spikes occur due to alternator load dump or cold-cranking. IC Role / Device Role / Timing Role: LTC2912HDDB-1#TRPBF acts as primary UV/OV supervisor, asserting latched OV during overvoltage events and holding UV low during undervoltage - ensuring deterministic MCU reset. Use Value: ±1.5% threshold accuracy prevents premature reset during nominal 5V ±5% ripple; H-grade rating sustains operation at 125°C ambient. |
Use Scenario: Supervises dual 3.3V and 2.5V rails powering FPGA I/O banks and analog front-end circuitry in modular PLC backplanes. IC Role / Device Role / Timing Role: LTC2912HDDB-1#TRPBF provides independent UV/OV detection per rail with adjustable timeout, feeding OR'd reset signals to centralized power management ASIC. Use Value: Open-drain outputs allow wired-OR reset bus; 29µA IQ enables continuous monitoring without impacting system standby power budget. |
| Telecom Base Station DC-DC Converter Output Validation | Medical Imaging Power Sequencing Controller |
Use Scenario: Validates 48V intermediate bus output from isolated DC-DC converters before enabling downstream point-of-load regulators. IC Role / Device Role / Timing Role: LTC2912HDDB-1#TRPBF monitors 48V via resistive divider on VH/VL, asserting OV if voltage exceeds 52.8V or UV if below 43.2V (±10% tolerance). Use Value: Internal 6.2V shunt regulator enables direct 48V connection with only one series resistor; glitch immunity prevents false trips during converter startup overshoot. |
Use Scenario: Ensures strict sequencing of 1.2V, 1.8V, and 3.3V imaging sensor supplies by generating timed reset pulses only after all rails stabilize within tolerance. IC Role / Device Role / Timing Role: LTC2912HDDB-1#TRPBF serves as precision timing element - its TMR capacitor sets minimum reset hold time (e.g., 200ms) to guarantee full rail settling before release. Use Value: Adjustable timeout replaces fixed-delay RC networks; ±1.5% threshold accuracy meets IEC 62304 Class C safety requirements for diagnostic confidence. |
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#TRPBF | Includes DIS pin for OV/UV output disable; no LATCH functionality; identical H-grade temp range and package | Suitable for margining tests requiring temporary suppression of reset signals without power cycle | Select when system-level diagnostics require dynamic reset inhibition - not for latched fault reporting |
| LTC2913IDDB#TRPBF | Dual independent UV/OV channels; separate VCC pin; wider 1.2V–6V VCC range; 30µA IQ; –40°C to +85°C grade | Monitors two rails simultaneously (e.g., core + I/O) with independent thresholds and timeouts | Choose for multi-rail supervision where space constraints preclude two single-channel devices |
Compared with LTC2912HDDB-2#TRPBF, the LTC2912HDDB-1#TRPBF provides persistent fault indication via latching but lacks disable capability; versus LTC2913IDDB#TRPBF, it offers superior thermal robustness (125°C vs 85°C) at the cost of single-rail monitoring.
Availability
LTC2912HDDB-1#TRPBF is available at Aetrix Electronics and suitable for automotive ECU power monitoring, industrial PLC I/O supervision, telecom base station DC-DC validation, and medical imaging power sequencing requiring stable component supply across extended temperature ranges.
Supply support for LTC2912HDDB-1#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 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 product line delivers precision, micropower voltage supervision for mission-critical power integrity - designed specifically for systems demanding guaranteed reset behavior under extreme thermal and electrical stress.
FAQ
What is the operating temperature range of the LTC2912HDDB-1#TRPBF?
The LTC2912HDDB-1#TRPBF is rated for –40°C to +125°C, qualifying it for under-hood automotive, industrial motor drive, and telecom infrastructure applications. This H-grade specification is confirmed in the Absolute Maximum Ratings table and validated across all electrical characteristics in the datasheet's "l" (full-range) columns.
How does the LATCH pin function on the LTC2912HDDB-1#TRPBF?
On the LTC2912HDDB-1#TRPBF, the LATCH pin (Pin 1) controls OV output behavior: when held low, OV latches low upon overvoltage detection and remains asserted until LATCH is pulled high. When pulled high, OV behaves like UV - asserting for the programmed timeout period then releasing. This enables both persistent fault signaling and timed reset generation.
Can the LTC2912HDDB-1#TRPBF monitor a 48V supply directly?
Yes - the LTC2912HDDB-1#TRPBF can monitor 48V supplies directly using its internal 6.2V shunt regulator on the VCC pin. A series current-limiting resistor must be added to restrict VCC pin current to ≤10mA. For example, with 48V input, a 4.2kΩ resistor limits current to ~10mA while dropping ~42V across itself.
What is the minimum capacitor value required on the TMR pin of the LTC2912HDDB-1#TRPBF?
The TMR pin of the LTC2912HDDB-1#TRPBF requires a minimum 10pF capacitor to ground to ensure stable timeout operation. Values below this may cause erratic reset timing or failure to assert. The datasheet specifies CTMR ≥ 10pF in the PIN FUNCTIONS section and confirms stability in the Typical Performance Characteristics graphs.
Does the LTC2912HDDB-1#TRPBF support open-drain wired-OR reset bus configurations?
Yes - both UV and OV outputs of the LTC2912HDDB-1#TRPBF are open-drain, enabling direct wired-OR connection with other reset sources (e.g., watchdog timers, manual reset buttons). Each output includes a weak internal pull-up to VCC, eliminating need for external resistors unless faster rise times are required.
LTC2912HDDB-1#TRPBF 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#TRPBF FAQ
1.How can I place an order for LTC2912HDDB-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912HDDB-1#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 LTC2912HDDB-1#TRPBF reliable?
The price and inventory of LTC2912HDDB-1#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2912HDDB-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912HDDB-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912HDDB-1#TRPBF?
LTC2912HDDB-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912HDDB-1#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 LTC2912HDDB-1#TRPBF?
For technical support, including LTC2912HDDB-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912HDDB-1#TRPBF requirements.
6.How does Aetrix verify that LTC2912HDDB-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912HDDB-1#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 LTC2912HDDB-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2912HDDB-1#TRPBF?
All LTC2912HDDB-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912HDDB-1#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 LTC2912HDDB-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC2912HDDB-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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