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Analog Devices Inc. LTC2912HDDB-3#TRMPBF
- Part No.:
- LTC2912HDDB-3#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2912HDDB-3#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,014
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Product details
Overview
LTC2912HDDB-3#TRMPBF from Analog Devices is a single-channel UV/OV voltage monitor IC with noninverting OV output, ±1.5% threshold accuracy, 29µA quiescent current, and operation from 2.3V to 6V (or higher via internal 6.2–7.3V shunt regulator). It delivers independent adjustable reset timeout for undervoltage and overvoltage events in industrial-grade embedded power supervision applications.
For engineers reviewing the LTC2912HDDB-3#TRMPBF datasheet, LTC2912HDDB-3#TRMPBF pinout, LTC2912HDDB-3#TRMPBF application, or LTC2912HDDB-3#TRMPBF equivalent, key selection criteria include H-grade temperature range (–40°C to 125°C), DFN-8 (3mm × 2mm) package with exposed pad, latch-clear functionality on Pin 1, and guaranteed OV/UV assertion down to VCC = 1V.
Technical Context
The LTC2912HDDB-3#TRMPBF implements dual comparator-based monitoring with integrated low-pass filtering on VH and VL inputs to reject supply glitches without hysteresis-induced trip error. Its internal oscillator drives an adjustable timeout timer (tUOTO = 6–14ms at CTMR = 1nF) that holds UV/OV outputs asserted after fault clearance.
It features a precision 0.5V internal reference, VCC shunt regulation (6.2–7.3V, ±200mV load regulation), and open-drain UV/OV outputs with weak internal pull-up to VCC and strong active-low sink capability (VOL ≤ 0.15V at IUV = 100µA, VCC = 1V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.3V to 6V direct; up to 48V with external series resistor due to 6.2–7.3V internal shunt regulator |
| Threshold Accuracy | ±1.5% over full –40°C to 125°C operating range - enables precise 3.3V ±10% monitoring without calibration |
| Quiescent Current | 29µA typical - supports always-on supervision in battery-backed or energy-constrained systems |
| UV/OV Timeout Range | 6–14ms at CTMR = 1nF (H-grade); scalable from µs to seconds via external TMR capacitor (≥10pF) |
| Output Type | Open-drain UV (Pin 2) and noninverting OV (Pin 3) - supports wired-OR, level-shifting, and compatibility with 1.8V–5V logic |
| Operating Temp | –40°C to +125°C (H-grade) - qualified for under-hood automotive, industrial PLC, and telecom base station use |
| VCC UVLO Threshold | 1.9–2.1V with 5–50mV hysteresis - ensures reliable power-on reset initiation even during brownout |
Pinout & Package
Package: 8-lead (3mm × 2mm) plastic DFN (DDB) with exposed thermal pad (Pin 9, GND). JEDEC MO-229 compliant; θJA = 55°C/W; requires soldering of exposed pad for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LATCH (Pin 1) | OV latch clear/bypass control | Pull high to clear OV latch or bypass timing; enables nonlatching OV behavior identical to UV output |
| UV (Pin 2) | Undervoltage logic output | Active-low open-drain output; asserts low when VH input falls below threshold; guaranteed operation down to VCC = 1V |
| OV (Pin 3) | Overvoltage logic output | Noninverting, active-high open-drain output (LTC2912-3 variant); latches high on OV event unless LATCH is pulled high |
| GND (Pin 4) | Device ground reference | Primary ground return; exposed pad (Pin 9) must be soldered to PCB ground plane for thermal and noise performance |
| TMR (Pin 5) | Reset timeout timer control | Connect external capacitor (≥10pF) to GND to set UV/OV pulse width; tie to VCC to disable timeout |
| VL (Pin 6) | Overvoltage sense input | Input triggers OV when voltage exceeds 0.5V; referenced to internal 0.5V comparator; tie to GND if unused |
| VH (Pin 7) | Undervoltage sense input | Input triggers UV when voltage falls below 0.5V; referenced to same 0.5V comparator; tie to VCC if unused |
| VCC (Pin 8) | Power supply input | Accepts 2.3–6V directly; regulates >6V supplies via internal shunt; bypass with ≥0.1µF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Glitch-immune sensing | Integrated low-pass filtering on VH/VL inputs rejects transients <500µs without hysteresis-induced trip inaccuracy |
| Wide-supply operation | Internal 6.2–7.3V shunt regulator enables direct connection to 12V/24V/48V rails using only one series resistor |
| H-grade reliability | Qualified for –40°C to +125°C operation with guaranteed parameters - suitable for harsh-environment industrial control |
| Low-voltage validity | Guaranteed UV/OV assertion at VCC ≥ 1V - ensures robust power-on reset sequencing in deep-brownout conditions |
| Space-efficient packaging | 3mm × 2mm DFN-8 footprint with thermal pad reduces board area vs TSOT-23 while improving thermal dissipation |
Applications
| Industrial PLC Power Supervision | Automotive Infotainment Core Supply Monitoring |
|---|---|
Use Scenario: Continuous monitoring of 3.3V core rail in programmable logic controller CPU module subject to EMI and load-switching transients. IC Role / Device Role / Timing Role: Single-point UV/OV supervisor providing glitch-filtered reset assertion with 200ms timeout (via 22nF TMR cap) to ensure firmware reload stability after power recovery. Use Value: ±1.5% threshold accuracy prevents false resets during nominal 3.3V ±10% tolerance operation; 29µA ICC enables always-on supervision without impacting system standby budget. | Use Scenario: Supervising 3.3V I/O supply in automotive infotainment head unit where thermal stress and wide ambient temperature swings occur. IC Role / Device Role / Timing Role: H-grade (–40°C to 125°C) voltage monitor asserting noninverting OV (Pin 3) and open-drain UV (Pin 2) to MCU reset controller during cold-crank or load-dump events. Use Value: Guaranteed operation down to VCC = 1V ensures reset generation even during severe brownout; DFN package with exposed pad maintains junction temperature within spec under sustained 85°C ambient. |
| Telecom Base Station 48V Input Validation | Medical Imaging System Dual-Rail Sequencing |
Use Scenario: Validating 48V backplane input before enabling downstream DC/DC converters in 5G radio unit power architecture. IC Role / Device Role / Timing Role: High-voltage supervisor using internal shunt regulator and external 200kΩ dropping resistor; OV output signals "POWERGOOD" to system manager after 85ms timeout. Use Value: 6.2–7.3V shunt regulation allows direct 48V interface without external LDO; ±1.5% accuracy ensures compliance with <±10% 48V power-good specification. | Use Scenario: Coordinating startup of 3.3V and 2.5V analog/digital rails in portable MRI subsystem requiring strict sequencing and fault isolation. IC Role / Device Role / Timing Role: Dual-rail monitor configured with discrete resistive dividers on VH/VL inputs; UV output triggers sequencer enable only after both rails stabilize within tolerance. Use Value: Independent UV/OV timeout control prevents premature release of downstream enable signals; open-drain outputs allow OR-ing with other supervisors for system-level fault aggregation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912HDDB-1#TRMPBF | Latching OV output (active-low) vs noninverting OV (active-high); identical pinout, specs, and H-grade rating | Suitable where system reset logic expects active-low OV signal; requires no schematic change except pull-up configuration | Select when legacy reset controller requires inverted OV polarity; same layout and thermal design apply |
| LTC2913HDE#TRPBF | Dual independent UV/OV channels in 10-lead DFN; higher channel count but larger footprint and 45µA ICC | Required for monitoring two separate supplies (e.g., 3.3V + 1.8V) with independent timeouts and thresholds | Choose only when dual-rail supervision is mandatory; not drop-in - requires PCB redesign and BOM update |
Compared with LTC2912HDDB-1#TRMPBF, the LTC2912HDDB-3#TRMPBF provides active-high OV signaling ideal for direct interfacing with microcontrollers lacking dedicated active-low reset inputs; versus LTC2913HDE#TRPBF, it offers lower cost, smaller size, and lower power for single-rail applications where dual monitoring is unnecessary.
Availability
LTC2912HDDB-3#TRMPBF is available at Aetrix Electronics and suitable for industrial PLCs, automotive infotainment modules, and telecom base station power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2912HDDB-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2912 product line delivers micropower, precision voltage supervision ICs optimized for space-constrained, thermally demanding applications where glitch immunity, wide supply range, and guaranteed low-voltage operation are critical.
FAQ
What is the operating temperature range for the LTC2912HDDB-3#TRMPBF?
The LTC2912HDDB-3#TRMPBF is rated for –40°C to +125°C (H-grade), with all electrical specifications guaranteed across this full range. This makes it suitable for under-hood automotive, industrial control, and telecom infrastructure applications where ambient temperatures exceed standard commercial or industrial grades.
How does the LTC2912HDDB-3#TRMPBF handle overvoltage detection differently than the LTC2912-1 variant?
The LTC2912HDDB-3#TRMPBF features a noninverting OV output (Pin 3) that asserts high during overvoltage events, whereas the LTC2912-1 variant has an active-low latched OV output. Both share identical pinout, threshold accuracy, and timeout behavior - only the OV polarity and latch-clear interaction differ.
Can the LTC2912HDDB-3#TRMPBF monitor a 48V supply directly?
Yes - the LTC2912HDDB-3#TRMPBF incorporates an internal 6.2–7.3V shunt regulator on the VCC pin. To monitor 48V, connect it through a series current-limiting resistor (e.g., 200kΩ for ~200µA) to keep VCC pin current ≤10mA, enabling direct high-voltage interface without external regulators.
What is the minimum capacitor value required on the TMR pin of the LTC2912HDDB-3#TRMPBF?
The TMR pin requires a minimum external capacitor of 10pF to GND to ensure stable timeout operation. Values below 10pF may cause erratic or shortened reset pulses. For example, a 1nF capacitor yields an 8.5ms timeout (H-grade), scaling linearly per the 9ms/nF nominal rate.
Does the LTC2912HDDB-3#TRMPBF require external pull-up resistors on its UV and OV outputs?
The LTC2912HDDB-3#TRMPBF includes weak internal pull-ups to VCC on both UV and OV pins, eliminating external resistors in most cases. However, for reliable OV high-state assertion at VCC < 2V, an external ≤100kΩ pull-up is recommended - especially when interfacing with 1.8V logic or in wired-OR configurations.
LTC2912HDDB-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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC2912HDDB-3#TRMPBF FAQ
1.How can I place an order for LTC2912HDDB-3#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912HDDB-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 LTC2912HDDB-3#TRMPBF reliable?
The price and inventory of LTC2912HDDB-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 LTC2912HDDB-3#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2912HDDB-3#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912HDDB-3#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912HDDB-3#TRMPBF?
LTC2912HDDB-3#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912HDDB-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 LTC2912HDDB-3#TRMPBF?
For technical support, including LTC2912HDDB-3#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912HDDB-3#TRMPBF requirements.
6.How does Aetrix verify that LTC2912HDDB-3#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912HDDB-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 LTC2912HDDB-3#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2912HDDB-3#TRMPBF?
All LTC2912HDDB-3#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912HDDB-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 LTC2912HDDB-3#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2912HDDB-3#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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