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Analog Devices Inc. LTC2912IDDB-1#TRMPBF
- Part No.:
- LTC2912IDDB-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2912IDDB-1#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:910
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Product details
Overview
LTC2912IDDB-1#TRMPBF from Analog Devices is a single-channel UV/OV voltage monitor IC with latch-controlled overvoltage output, designed for reliable power supply supervision in space-constrained systems. It features ±1.5% threshold accuracy, 29µA quiescent current, adjustable reset timeout via external capacitor (8.5ms typical with 1nF), and operates from 2.3V to 6V supply or higher via internal 6.2V shunt regulator - used in desktop/server core voltage monitoring.
For engineers reviewing the LTC2912IDDB-1#TRMPBF datasheet, LTC2912IDDB-1#TRMPBF pinout, LTC2912IDDB-1#TRMPBF application, or LTC2912IDDB-1#TRMPBF equivalent, key selection criteria include guaranteed OV/UV assertion down to VCC = 1V, glitch-immune VH/VL inputs, open-drain UV/OV outputs with weak internal pull-ups, and DFN-8 (3mm × 2mm) package compatibility with high-density PCB layouts.
Technical Context
The LTC2912IDDB-1#TRMPBF implements dual comparator-based monitoring: VH input triggers undervoltage detection when below 0.5V threshold; VL input triggers overvoltage detection when above 0.5V threshold. Both inputs include low-pass filtering to reject sub-500µs glitches, ensuring noise immunity without added hysteresis error.
Its TMR pin controls a programmable timeout period (6–14ms range depending on grade and CTMR) that holds UV/OV outputs asserted after fault clearance; LATCH pin enables OV output latching (low-active) or bypasses latching when pulled high. Internal VCC shunt regulator (6.2V typ.) allows direct operation from 12V/24V/48V supplies with external current-limiting resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 6V direct; up to 48V with series resistor and internal 6.2V shunt regulator |
| Threshold Accuracy | ±1.5% over full temperature range - ensures precise 3.3V ±10% monitoring without calibration |
| Quiescent Current | 29µA typical - enables always-on supervision in battery-backed or low-power systems |
| UV/OV Timeout Period | 8.5ms typical with 1nF TMR capacitor - provides stable reset pulse width for system settling |
| Input Glitch Immunity | Rejects transients <500µs at 5mV overdrive - eliminates false resets from supply noise |
| Output Type | Open-drain UV and OV with weak internal pull-up to VCC - supports wired-OR and level-shifting |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded and server applications |
Pinout & Package
Package: 8-Lead (3mm × 2mm) Plastic DFN (DDB), exposed pad (Pin 9) connected to GND. Thermal resistance θJA = 55°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 8) | Power supply input | Accepts 2.3–6V directly; regulates >6V via internal 6.2V shunt - requires series resistor for 12V+ operation |
| VH (Pin 7) | Undervoltage sense input | Triggers UV when voltage falls below 0.5V - tied to high-side divider tap for positive rail monitoring |
| VL (Pin 6) | Overvoltage sense input | Triggers OV when voltage rises above 0.5V - tied to low-side divider tap for positive rail monitoring |
| TMR (Pin 5) | Timeout timer control | Connects to GND via capacitor (e.g., 1nF → 8.5ms); tie to VCC to disable timeout |
| LATCH (Pin 1) | OV latch enable/bypass | Pull low to latch OV output; pull high to make OV behave like UV (timeout-based, non-latching) |
| UV (Pin 2) | Undervoltage logic output | Open-drain, active-low - asserts low during VH undervoltage; held low for timeout after recovery |
| OV (Pin 3) | Overvoltage logic output | Open-drain, active-low (LTC2912-1 variant) - latches low on VL overvoltage until LATCH is pulled high |
| GND (Pin 4) | Ground reference | Primary return path; exposed pad (Pin 9) must be soldered to PCB ground plane for thermal and electrical integrity |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable UV/OV trip points | Set via external resistor divider on VH/VL - supports custom thresholds (e.g., 3.3V ±10%, 5V ±10%) |
| Guaranteed operation at low VCC | UV/OV outputs functional down to VCC = 1V - ensures supervision during brownout and power-up sequences |
| Glitch-immune comparator inputs | Integrated low-pass filtering rejects brief transients - avoids false resets without adding hysteresis error |
| Latch-controlled OV output | LATCH pin enables persistent fault indication (latched OV) or synchronized timing (bypassed latch) |
| Space-efficient DFN packaging | 3mm × 2mm footprint with exposed thermal pad - reduces board area vs TSOT-23 while improving thermal performance |
Applications
| Desktop & Notebook Computers | Network Servers |
|---|---|
|
Use Scenario: Monitoring 3.3V core voltage with ±10% tolerance during boot and runtime. IC Role / Device Role / Timing Role: Single-supply UV/OV supervisor asserting reset signals to CPU and chipset upon violation. Use Value: ±1.5% threshold accuracy ensures reliable detection within tight 3.3V ±0.33V window; 29µA ICC minimizes standby power impact. |
Use Scenario: Supervising 12V auxiliary rails in redundant power modules of blade servers. IC Role / Device Role / Timing Role: High-voltage-capable monitor (via shunt regulator + series resistor) triggering system-level fault alerts. Use Value: Internal 6.2V shunt enables direct 12V/24V/48V operation without external regulators; latch function holds alarm until manual clear. |
| Core Voltage Monitors | I/O Voltage Monitors |
|
Use Scenario: Validating 1.8V or 2.5V FPGA core supplies in industrial controllers. IC Role / Device Role / Timing Role: Precision threshold detector with adjustable timeout preventing premature release after transient dips. Use Value: 8.5ms timeout (configurable via TMR capacitor) guarantees minimum reset pulse width for stable core initialization. |
Use Scenario: Ensuring 3.3V I/O bank voltage remains within spec before enabling PCIe or SATA interfaces. IC Role / Device Role / Timing Role: Dual-threshold supervisor generating independent UV and OV flags for safety-critical interface arbitration. Use Value: Open-drain UV/OV outputs support wired-OR connection to shared reset bus; weak internal pull-ups eliminate external resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912ITS8-1#TRMPBF | Same functionality and specs, but in 8-lead TSOT-23 package (2.9mm × 1.6mm) | Lower thermal performance (θJA = 195°C/W vs 55°C/W) and larger footprint than DFN | Select for legacy TSOT-23 layouts or where exposed pad soldering is not feasible |
| LTC2913IDDB#TRMPBF | Dual UV/OV monitor (two independent channels), same DFN-8 package, 30µA ICC | Supports monitoring of two rails (e.g., core + I/O) with single device - no latch control on second channel | Choose when supervising multiple supplies; adds channel count but removes latch flexibility per channel |
Compared with LTC2912IDDB-1#TRMPBF, the TSOT-23 variant trades thermal efficiency for assembly compatibility, while LTC2913IDDB#TRMPBF expands monitoring capability at the cost of dedicated latch control per channel - both require layout revision and firmware validation for drop-in replacement.
Availability
LTC2912IDDB-1#TRMPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and industrial embedded systems requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature operation.
Supply support for LTC2912IDDB-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and computing markets.
The LTC2912 product line delivers precision, low-power voltage supervision for mission-critical power sequencing and fault detection - engineered specifically for reliability in high-density computing and infrastructure equipment.
FAQ
What is the operating temperature range for LTC2912IDDB-1#TRMPBF?
LTC2912IDDB-1#TRMPBF is rated for –40°C to +85°C operation, meeting industrial-grade requirements. This range is confirmed by the "I" grade designation in the part number and validated across all electrical specifications in the datasheet, including threshold accuracy and timeout stability.
How does the LATCH pin function on LTC2912IDDB-1#TRMPBF?
On LTC2912IDDB-1#TRMPBF, the LATCH pin (Pin 1) controls OV output behavior: pulled low, it enables latched low-state OV output upon overvoltage detection; pulled high, it disables latching so OV follows UV timing (timeout-based assertion). This dual-mode operation is intrinsic to the -1 variant and documented in the Pin Functions section.
Can LTC2912IDDB-1#TRMPBF monitor a 48V supply directly?
Yes - LTC2912IDDB-1#TRMPBF can monitor 48V supplies using its internal 6.2V shunt regulator on the VCC pin. A series current-limiting resistor must be added between the 48V source and VCC to restrict input current to ≤10mA, as specified in Absolute Maximum Ratings and Applications Information.
What is the minimum capacitor value required on the TMR pin of LTC2912IDDB-1#TRMPBF?
The TMR pin of LTC2912IDDB-1#TRMPBF requires a minimum 10pF capacitor to GND for stable timeout operation. Values below this may cause erratic timing; the datasheet specifies CTMR ≥ 10pF and provides the formula CTMR = tUOTO × 115 × 10⁻⁹ for calculating exact values (e.g., 1nF yields 8.5ms).
Does LTC2912IDDB-1#TRMPBF support open-drain outputs with external pull-ups?
Yes - LTC2912IDDB-1#TRMPBF features open-drain UV and OV outputs with weak internal pull-ups to VCC. External pull-ups are fully supported and recommended when interfacing with higher-voltage logic or when faster rise times are needed; the datasheet confirms compatibility up to 16V on OV/UV pins.
LTC2912IDDB-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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC2912IDDB-1#TRMPBF FAQ
1.How can I place an order for LTC2912IDDB-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912IDDB-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 LTC2912IDDB-1#TRMPBF reliable?
The price and inventory of LTC2912IDDB-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 LTC2912IDDB-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912IDDB-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912IDDB-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912IDDB-1#TRMPBF?
LTC2912IDDB-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912IDDB-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 LTC2912IDDB-1#TRMPBF?
For technical support, including LTC2912IDDB-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912IDDB-1#TRMPBF requirements.
6.How does Aetrix verify that LTC2912IDDB-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912IDDB-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 LTC2912IDDB-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912IDDB-1#TRMPBF?
All LTC2912IDDB-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912IDDB-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 LTC2912IDDB-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912IDDB-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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