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Analog Devices Inc. LTC2912IDDB-3#TRMPBF
- Part No.:
- LTC2912IDDB-3#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2912IDDB-3#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
LTC2912IDDB-3#TRMPBF from Analog Devices is a single-channel UV/OV voltage monitor IC with noninverting open-drain OV output, ±1.5% threshold accuracy, 29µA quiescent current, and adjustable reset timeout via external capacitor - designed for reliable power-supply supervision in space-constrained industrial and computing systems.
For engineers reviewing the LTC2912IDDB-3#TRMPBF datasheet, LTC2912IDDB-3#TRMPBF pinout, LTC2912IDDB-3#TRMPBF application, or LTC2912IDDB-3#TRMPBF equivalent, key selection criteria include guaranteed operation down to VCC = 1V, glitch-immune VH/VL inputs, latch-clear functionality via LATCH pin, and compatibility with 3.3V ±10% supply monitoring using resistor-divider configuration.
Technical Context
The LTC2912IDDB-3#TRMPBF implements dual comparator-based UV/OV detection with internal 0.5V reference, low-pass filtering on VH and VL inputs to reject sub-500µs transients, and independent programmable timeout logic driven by an external TMR capacitor. Its noninverting OV output (LTC2912-3 variant) asserts high during overvoltage events with weak internal pull-up to VCC.
It integrates a 6.2–7.3V shunt regulator on VCC enabling direct operation from 12V/24V/48V supplies when paired with a series current-limiting resistor, while maintaining guaranteed UV/OV assertion down to VCC = 1V and full functionality above VCC = 2.3V. The DDB package features exposed thermal pad soldered to PCB ground for θJA = 55°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | 2.3V to 6V direct; up to 48V with external series resistor and internal 6.2–7.3V shunt regulation |
| UV/OV Threshold Accuracy | ±1.5% over full temperature range - ensures precise 3.3V ±10% monitoring without calibration |
| Quiescent Current | 29µA typical - enables micropower operation in battery-backed or always-on systems |
| Reset Timeout Range | 6ms to 14ms (H-grade) with 1nF TMR capacitor; scalable via CTMR = tUOTO × 115 nF/ms |
| Input Glitch Immunity | Rejects transients <500µs at 5mV overdrive - eliminates false resets from supply noise |
| Output Type | Open-drain UV (active-low), noninverting OV (active-high with weak VCC pull-up) |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded and network infrastructure applications |
Pinout & Package
Package: 8-lead (3mm × 2mm) plastic DFN (DDB) with exposed thermal pad (Pin 9), RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 8) | Supply input / shunt regulator input | Accepts 2.3–6V directly; regulates >6V supplies via internal 6.2–7.3V shunt; bypass with ≥0.1µF capacitor |
| VH (Pin 7) | Undervoltage sense input | Triggers UV when voltage falls below 0.5V ±1.5%; tie to VCC if unused |
| VL (Pin 6) | Overvoltage sense input | Triggers OV when voltage rises above 0.5V ±1.5%; tie to GND if unused |
| TMR (Pin 5) | Timeout timer control | Connect external capacitor (≥10pF) to GND for adjustable delay; tie to VCC to bypass timeout |
| LATCH (Pin 1) | OV latch clear/bypass control | Pull high to clear OV latch or bypass latch behavior; active-high, ±1µA input current |
| UV (Pin 2) | Undervoltage logic output | Open-drain, active-low output; guaranteed VOL ≤0.15V at VCC = 1V, IUV = 100µA |
| OV (Pin 3) | Overvoltage logic output | Noninverting, active-high open-drain with weak internal pull-up to VCC; latches high on OV event |
| GND (Pin 4) | Ground reference | Primary signal and power return; exposed pad (Pin 9) must be soldered to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed operation at VCC ≥ 1V | Enables valid UV/OV assertion during brown-out and power-up sequences before full rail stabilization |
| Adjustable reset timeout with disable | External capacitor sets pulse width (6–14ms typ.); TMR tied to VCC disables timing for immediate response |
| Power supply glitch immunity | Integrated low-pass filtering rejects brief transients without adding hysteresis-induced trip error |
| Noninverting OV output (LTC2912-3) | Simplifies wired-OR reset bus integration where multiple supervisors share common reset line |
| 8-lead DFN package with thermal pad | 3mm × 2mm footprint and 55°C/W thermal resistance support high-density PCB layouts in thermally demanding environments |
Applications
| Desktop & Notebook Computers | Network Servers |
|---|---|
Use Scenario: Monitoring 3.3V core supply with ±10% tolerance during boot and runtime. IC Role / Device Role / Timing Role: Single UV/OV supervisor asserting reset until supply stabilizes within spec. Use Value: Prevents CPU lockup or firmware corruption by holding system in reset during marginal 3.3V conditions. |
Use Scenario: Supervising redundant 12V backplane supplies in blade server chassis. IC Role / Device Role / Timing Role: High-voltage-capable monitor using VCC shunt regulator and resistor divider on VL/VH. Use Value: Enables direct 12V supervision without external regulators, reducing BOM count and board area. |
| Core Voltage Monitors | I/O Voltage Monitors |
Use Scenario: Validating 2.5V or 1.8V FPGA core rails with tight tolerance requirements. IC Role / Device Role / Timing Role: Precision threshold detector with ±1.5% accuracy and temperature-stable reference. Use Value: Eliminates need for external precision resistors or calibration, improving yield and long-term reliability. |
Use Scenario: Ensuring PCIe or SATA I/O supply (3.3V) remains within specification before link training. IC Role / Device Role / Timing Role: Dual-threshold monitor generating clean, glitch-free reset pulse with programmable duration. Use Value: Guarantees sufficient reset hold time for PHY initialization while avoiding unnecessary delays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912IDDB-1#TRMPBF | Latching OV output (active-low); no noninverting OV capability | Requires external inverter or logic to generate active-high reset signal | Select when system requires latched fault indication and active-low reset assertion only |
| LTC2913IDDB#TRMPBF | Dual independent UV/OV channels; separate VCC pin; 10-lead DFN package | Supports monitoring of two distinct supplies (e.g., 3.3V and 1.8V) with independent timeouts | Choose when dual-rail supervision is needed and board space allows larger package |
Compared with LTC2912IDDB-1#TRMPBF, the LTC2912IDDB-3#TRMPBF provides native active-high OV signaling without external components; compared with LTC2913IDDB#TRMPBF, it offers lower cost and smaller footprint for single-supply applications but lacks dual-channel capability.
Availability
LTC2912IDDB-3#TRMPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and industrial embedded systems requiring stable component supply, extended temperature operation, and precise 3.3V ±10% monitoring.
Supply support for LTC2912IDDB-3#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 product line delivers micropower, precision voltage supervision ICs optimized for space-constrained, thermally demanding applications where reliable power-good signaling and glitch immunity are critical.
FAQ
What is the function of the LATCH pin on the LTC2912IDDB-3#TRMPBF?
The LATCH pin on the LTC2912IDDB-3#TRMPBF controls the OV output latch behavior: when pulled low, OV latches high upon overvoltage detection; when pulled high, the latch is cleared and OV behaves like UV with programmable timeout. This enables flexible reset management - either persistent fault indication or timed reset pulses - without external logic.
Can the LTC2912IDDB-3#TRMPBF monitor a 12V supply directly?
Yes, the LTC2912IDDB-3#TRMPBF can monitor a 12V supply directly using its internal VCC shunt regulator. A series current-limiting resistor must be placed between the 12V source and the VCC pin to limit input current to ≤10mA. The shunt regulates VCC to 6.2–7.3V, enabling full functionality while protecting internal circuitry.
What is the minimum capacitor value required on the TMR pin of the LTC2912IDDB-3#TRMPBF?
The minimum capacitor value required on the TMR pin of the LTC2912IDDB-3#TRMPBF is 10pF. Values below this may cause unstable or undefined timeout behavior. For standard applications, 1nF yields ~8.5ms timeout; capacitance scales linearly per CTMR = tUOTO × 115 nF/ms.
How does the LTC2912IDDB-3#TRMPBF ensure accurate 3.3V ±10% monitoring?
The LTC2912IDDB-3#TRMPBF achieves accurate 3.3V ±10% monitoring using its ±1.5% threshold accuracy over –40°C to +85°C, combined with a resistor divider (RA/RB/RC) that maps 3.3V nominal to 0.5V at VH and VL inputs. The internal 0.5V reference and low-drift comparators maintain trip point stability across temperature and supply variations.
Is the exposed pad on the LTC2912IDDB-3#TRMPBF DFN package electrically connected?
Yes, the exposed pad (Pin 9) on the LTC2912IDDB-3#TRMPBF DFN package is internally connected to GND and must be soldered to the PCB ground plane. This connection is mandatory for thermal performance (θJA = 55°C/W) and electrical stability; leaving it unconnected degrades thermal dissipation and may cause erratic operation.
LTC2912IDDB-3#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 High
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC2912IDDB-3#TRMPBF FAQ
1.How can I place an order for LTC2912IDDB-3#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912IDDB-3#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 LTC2912IDDB-3#TRMPBF reliable?
The price and inventory of LTC2912IDDB-3#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912IDDB-3#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912IDDB-3#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912IDDB-3#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912IDDB-3#TRMPBF?
LTC2912IDDB-3#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912IDDB-3#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 LTC2912IDDB-3#TRMPBF?
For technical support, including LTC2912IDDB-3#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912IDDB-3#TRMPBF requirements.
6.How does Aetrix verify that LTC2912IDDB-3#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912IDDB-3#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 LTC2912IDDB-3#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912IDDB-3#TRMPBF?
All LTC2912IDDB-3#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912IDDB-3#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 LTC2912IDDB-3#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912IDDB-3#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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