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Analog Devices Inc. LTC2912IDDB-2#TRMPBF
- Part No.:
- LTC2912IDDB-2#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2912IDDB-2#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,638
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Product details
Overview
LTC2912IDDB-2#TRMPBF from Analog Devices is a single-channel UV/OV voltage monitor IC with independent undervoltage and overvoltage detection, ±1.5% threshold accuracy, 29µA quiescent current, and adjustable reset timeout via external capacitor. It operates from 2.3V to 6V supply or higher (e.g., 12V/24V/48V) using internal shunt regulation and supports margining applications via DIS pin disable functionality.
For engineers reviewing the LTC2912IDDB-2#TRMPBF datasheet, LTC2912IDDB-2#TRMPBF pinout, LTC2912IDDB-2#TRMPBF application, or LTC2912IDDB-2#TRMPBF equivalent, key selection criteria include guaranteed OV/UV assertion at VCC ≥ 1V, open-drain output drive capability, glitch-immune comparator inputs, and DFN-8 (3mm × 2mm) package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The LTC2912IDDB-2#TRMPBF implements dual comparators with low-pass filtering on VL and VH inputs to reject transient glitches, ensuring robust reset generation without false triggering. Its internal VCC shunt regulator (6.2V nominal) enables direct operation from high-voltage rails when paired with an external series resistor.
It features independent UV and OV outputs with programmable timeout period (tUOTO = 9ms/nF), disable control via DIS pin (pin 1 in DFN), and guaranteed functional operation down to VCC = 1V - critical for brownout detection during power-up/power-down sequences in server and embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 6V direct; up to 48V with external current-limiting resistor via 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 monitoring in battery-backed or low-power systems |
| UV/OV Timeout Period | Adjustable from ~6ms to >10s via external TMR capacitor (CTMR = tUOTO × 115 nF/s) |
| Output Type | Open-drain UV and OV outputs - supports wired-OR configurations and flexible pull-up voltage levels |
| Operating Temperature | –40°C to +85°C - qualified for industrial and network infrastructure environments |
| Input Glitch Immunity | Integrated low-pass filtering on VL/VH inputs - rejects sub-500µs transients without added hysteresis |
Pinout & Package
Package: 8-Lead (3mm × 2mm) Plastic DFN (DDB) with exposed thermal pad (Pin 9 = GND, must be soldered).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIS (Pin 1) | Output Disable Control | Pulls UV/OV high when asserted; weak internal 2µA pull-down allows floating for default enable |
| UV (Pin 2) | Undervoltage Output | Open-drain active-low output asserting when VH input falls below threshold |
| OV (Pin 3) | Overvoltage Output | Open-drain active-low output asserting when VL input rises above threshold |
| GND (Pin 4) | Ground Reference | Primary return path for internal circuitry and external filter capacitors |
| TMR (Pin 5) | Timeout Timer Input | Connects to external capacitor to set UV/OV assertion duration; tie to VCC to bypass |
| VL (Pin 6) | Overvoltage Sense Input | Comparator input detecting voltage exceeding 0.5V threshold - used with resistive divider |
| VH (Pin 7) | Undervoltage Sense Input | Comparator input detecting voltage falling below 0.5V threshold - used with resistive divider |
| VCC (Pin 8) | Power Supply Input | Accepts 2.3–6V directly; regulates higher voltages via internal 6.2V shunt; requires 0.1µF bypass |
Key Features
| Feature | Design Value |
|---|---|
| Independent UV and OV outputs | Enables separate system-level fault signaling and sequencing control without external logic |
| Adjustable reset timeout with disable | Supports margining test modes by disabling UV/OV outputs while retaining valid VCC supervision |
| Guaranteed operation at VCC ≥ 1V | Ensures reliable power-up reset assertion even during deep brownout conditions |
| Glitch-immune comparator inputs | Eliminates need for external RC filters or hysteresis networks in noisy power rail environments |
| Low 29µA quiescent current | Permits continuous monitoring in energy-constrained applications such as remote sensors or backup circuits |
Applications
| Desktop & Notebook Computers | Network Servers |
|---|---|
Use Scenario: Monitoring 3.3V ±10% core voltage rail during boot and runtime. IC Role / Device Role / Timing Role: Single-supply UV/OV supervisor providing reset pulse with 200ms timeout after fault clearance. Use Value: Prevents processor lockup due to marginal supply conditions while avoiding nuisance resets from brief transients. | Use Scenario: Supervising 12V or 48V intermediate bus in redundant PSU modules. IC Role / Device Role / Timing Role: High-voltage tolerant monitor using internal shunt regulator and external dropping resistor. Use Value: Enables direct high-side monitoring without level-shifting circuitry, reducing BOM count and layout area. |
| Core & I/O Voltage Monitors | Industrial Embedded Systems |
Use Scenario: Dual-rail monitoring of 3.3V and 2.5V supplies in FPGA-based control cards. IC Role / Device Role / Timing Role: Configured with discrete resistor dividers per rail; DIS pin used for functional safety test mode. Use Value: Provides independent fault reporting per rail while sharing one compact DFN footprint and enabling margin testing. | Use Scenario: Brownout detection in PLC I/O modules powered from unregulated 24V DC. IC Role / Device Role / Timing Role: Operates from 24V via series resistor; asserts UV at VCC = 1V to guarantee early reset before logic collapse. Use Value: Ensures deterministic system shutdown during gradual voltage decay, preventing corrupted state transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912IDDB-1#TRMPBF | LATCH pin instead of DIS; OV output latches low on fault and requires external clear signal | Not suitable for margining; better for systems requiring persistent fault indication until manual reset | Select LTC2912IDDB-2#TRMPBF when output disable during test or calibration is required |
| LTC2912IDDB-3#TRMPBF | Noninverting OV output (active-high) with LATCH pin; no DIS function | Requires external pull-down for active-low logic interface; lacks margining disable capability | Choose LTC2912IDDB-2#TRMPBF for standard open-drain active-low UV/OV signaling with disable control |
Compared with LTC2912IDDB-1#TRMPBF and LTC2912IDDB-3#TRMPBF, the LTC2912IDDB-2#TRMPBF uniquely provides dedicated DIS functionality for margining, making it the only variant supporting simultaneous UV/OV output disable without affecting VCC supervision integrity.
Availability
LTC2912IDDB-2#TRMPBF is available at Aetrix Electronics and suitable for desktop computers, network servers, and industrial embedded systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC2912IDDB-2#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, communications, and automotive markets.
The LTC2912 product line delivers micropower, high-accuracy voltage supervision for space-constrained and thermally demanding applications - designed specifically for reliable power-good signaling in computing and infrastructure equipment.
FAQ
What is the operating temperature range for the LTC2912IDDB-2#TRMPBF?
The LTC2912IDDB-2#TRMPBF is rated for industrial temperature operation from –40°C to +85°C, as confirmed by its "I" grade designation and DFN package thermal performance (θJA = 55°C/W). This range supports deployment in network servers, industrial controllers, and outdoor telecom equipment where ambient temperatures exceed commercial limits. The device maintains ±1.5% threshold accuracy across this full span.
How does the DIS pin on the LTC2912IDDB-2#TRMPBF function in margining applications?
The DIS pin (Pin 1) on the LTC2912IDDB-2#TRMPBF disables both UV and OV outputs when pulled high, forcing them into a weakly pulled-high state regardless of input faults - except during VCC undervoltage lockout (UVLO), where UV asserts low. This enables safe voltage margining tests without unintended system resets. The pin has a 2µA internal pull-down, so leaving it unconnected defaults to enabled operation.
Can the LTC2912IDDB-2#TRMPBF monitor a 48V supply directly?
Yes - the LTC2912IDDB-2#TRMPBF can monitor a 48V supply 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. For example, a 3.8kΩ resistor yields ~10mA at 48V, keeping VCC regulated at ~6.2V while dissipating ~420mW in the resistor. The device then monitors the scaled VL/VH inputs as usual.
What is the minimum VCC voltage required for the LTC2912IDDB-2#TRMPBF to assert valid UV and OV outputs?
The LTC2912IDDB-2#TRMPBF guarantees UV and OV output functionality down to VCC = 1V, as specified in the Electrical Characteristics table under "VCCR(MIN)". At this level, UV will assert low and OV will be blocked except during UVLO. Full comparator operation (VH/VL input control) begins at VCC ≥ 2.1V. This ultra-low VCC operation ensures fail-safe reset generation during severe brownout events.
How is the reset timeout period set on the LTC2912IDDB-2#TRMPBF?
The reset timeout period (tUOTO) on the LTC2912IDDB-2#TRMPBF is set by connecting an external capacitor (CTMR) between the TMR pin (Pin 5) and GND. The relationship is tUOTO ≈ 9ms per nanofarad (e.g., 1nF → ~9ms, 22nF → ~200ms). The TMR pin must see ≥10pF load or be tied to VCC to bypass timing. Leakage current in CTMR must stay below 1.3µA to avoid timing drift.
LTC2912IDDB-2#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/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-2#TRMPBF FAQ
1.How can I place an order for LTC2912IDDB-2#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912IDDB-2#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-2#TRMPBF reliable?
The price and inventory of LTC2912IDDB-2#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-2#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912IDDB-2#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912IDDB-2#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912IDDB-2#TRMPBF?
LTC2912IDDB-2#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912IDDB-2#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-2#TRMPBF?
For technical support, including LTC2912IDDB-2#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912IDDB-2#TRMPBF requirements.
6.How does Aetrix verify that LTC2912IDDB-2#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912IDDB-2#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-2#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912IDDB-2#TRMPBF?
All LTC2912IDDB-2#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912IDDB-2#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-2#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912IDDB-2#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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