My Inquiry
My Account
Analog Devices Inc. LTC2912CDDB-3#TRPBF
- Part No.:
- LTC2912CDDB-3#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2912CDDB-3#TRPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,259
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2912CDDB-3#TRPBF from Analog Devices is a single-channel UV/OV voltage monitor IC in an 8-lead (3mm × 2mm) DFN package, operating from 2.3V to 6V supply with ±1.5% threshold accuracy, 29µA quiescent current, and noninverting open-drain OV output - used for reliable power-good assertion in 3.3V ±10% systems.
For engineers reviewing the LTC2912CDDB-3#TRPBF datasheet, LTC2912CDDB-3#TRPBF pinout, LTC2912CDDB-3#TRPBF application, or LTC2912CDDB-3#TRPBF equivalent, key selection criteria include its latch-controlled noninverting OV output, adjustable timeout via TMR capacitor, guaranteed operation down to VCC = 1V, and compatibility with high-voltage supplies via internal 6.2V shunt regulator.
Technical Context
The LTC2912CDDB-3#TRPBF implements dual comparator-based monitoring: VH input triggers undervoltage when below 0.5V, VL input triggers overvoltage when above 0.5V. Both inputs feature integrated low-pass filtering for glitch immunity without added hysteresis error.
Its TMR pin sets UV/OV timeout duration (e.g., 8.5ms with 1nF), and LATCH pin enables OV latching behavior - pulled low for latched high OV output, pulled high to bypass latch and enable timed pulse mode. The device guarantees valid outputs at VCC ≥ 1V and supports operation up to 48V via external series resistor into the VCC shunt regulator.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.3V to 6V direct; up to 48V with series resistor into 6.2V internal shunt regulator |
| Threshold Accuracy | ±1.5% over full temperature range - ensures precise 3.3V ±10% trip points without calibration |
| Quiescent Current | 29µA typical - enables always-on monitoring in battery-backed or low-power systems |
| UV/OV Timeout | Adjustable from ~6ms to >10s via external TMR capacitor (9ms/nF scaling) |
| Output Type | Open-drain UV (active-low) and noninverting OV (active-high with weak pull-up to VCC) |
| Operating Temp | 0°C to 70°C (C-grade) - validated for commercial desktop, server, and industrial control environments |
| Reset Propagation Delay | 50µs to 500µs - fast response to supply transients while rejecting sub-50µs noise spikes |
Pinout & Package
Package: 8-lead (3mm × 2mm) plastic DFN with exposed pad (Pin 9), RoHS-compliant, moisture-sensitive level 1. Thermal resistance θJA = 55°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 8) | Supply Input / Shunt Regulator Anode | Accepts 2.3–6V directly; for >6V, functions as 6.2V shunt node requiring current-limiting resistor |
| VH (Pin 7) | Undervoltage Sense Input | Asserts UV when voltage falls below 0.5V; tied to high-side divider tap for positive rail monitoring |
| VL (Pin 6) | Overvoltage Sense Input | Asserts OV when voltage rises above 0.5V; tied to low-side divider tap for positive rail monitoring |
| TMR (Pin 5) | Timeout Timing Control | Connects to GND via capacitor (e.g., 22nF → 200ms timeout); tie to VCC to disable timeout |
| LATCH (Pin 1) | OV Latch Enable/Bypass | Pulled low → OV latches high on overvoltage; pulled high → OV behaves as timed pulse like UV |
| UV (Pin 2) | Undervoltage Output | Open-drain active-low output; weak internal pull-up to VCC; sinks 2.5mA at VOL ≤ 0.3V |
| OV (Pin 3) | Overvoltage Output | Noninverting open-drain active-high output; weak internal pull-up to VCC; sources <1µA at VOH ≥ 1V |
| 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 |
|---|---|
| Noninverting OV Output | Eliminates need for external inverter in power-good signaling; simplifies interface to microcontroller GPIO or LED drivers |
| Glitch-Immune Inputs | Integrated comparator output filtering rejects transients <50µs - avoids false resets without adding hysteresis-induced trip error |
| Low-VCC Operation Guarantee | Valid UV/OV assertion down to VCC = 1V - ensures robust reset behavior during brown-out and power-up sequencing |
| Adjustable Timeout Disable | TMR pin strapped to VCC disables timeout entirely - enables immediate fault response for safety-critical applications |
| High-Voltage Supply Compatibility | Internal 6.2V shunt regulator allows direct connection to 12V/24V/48V rails with only one series resistor - reduces BOM count |
Applications
| Desktop & Notebook Power Monitoring | Network Server Core Voltage Supervision |
|---|---|
|
Use Scenario: Monitoring 3.3V ±10% core logic supply in x86-based laptops and workstations. IC Role / Device Role / Timing Role: LTC2912CDDB-3#TRPBF provides independent UV and OV detection with noninverting OV output wired to chipset PWRGOOD. Use Value: ±1.5% threshold accuracy ensures reset only outside 2.97V–3.63V window; 29µA quiescent current minimizes standby power loss. |
Use Scenario: Supervising 12V intermediate bus and 3.3V I/O rail in 1U rack-mounted servers. IC Role / Device Role / Timing Role: LTC2912CDDB-3#TRPBF monitors each rail with dedicated resistive dividers; OV output drives FPGA configuration enable. Use Value: Adjustable timeout (via TMR capacitor) holds PWRGOOD stable for 200ms after rail stabilization - meets PCIe power sequencing requirements. |
| Industrial PLC Power Integrity | Medical Imaging System Power Sequencing |
|
Use Scenario: Detecting undervoltage/overvoltage on 24V DC input to programmable logic controllers in factory automation. IC Role / Device Role / Timing Role: LTC2912CDDB-3#TRPBF interfaces with 24V supply via resistor network and internal shunt regulator; UV output triggers system shutdown controller. Use Value: Guaranteed operation at VCC ≥ 1V ensures fail-safe behavior during brown-out; 55°C/W thermal resistance enables convection-cooled mounting. |
Use Scenario: Validating 48V main supply and 5V analog subsystem rails in MRI or CT scanner front-end electronics. IC Role / Device Role / Timing Role: LTC2912CDDB-3#TRPBF provides redundant UV/OV detection per rail; noninverting OV output feeds safety interlock logic. Use Value: Glitch-immune inputs prevent spurious resets from EMI-rich imaging environments; C-grade temp range covers controlled lab ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2912CDDB-1#TRPBF | Latching OV output is active-low (inverting), not active-high; identical pinout, timing, and accuracy | Requires external inverter or inverted logic interpretation for power-good signaling | Select when legacy design uses active-low PWRGOOD or when interfacing with older ASICs expecting inverted OV |
| LTC2913IDDB#TRPBF | Dual independent UV/OV channels, wider –40°C to 85°C grade, 10-lead DFN package | Monitors two rails simultaneously (e.g., 3.3V + 1.8V); higher pin count and cost; no LATCH pin | Choose for multi-rail systems where space permits and extended temperature range is required - not drop-in compatible |
Compared with LTC2912CDDB-1#TRPBF, the LTC2912CDDB-3#TRPBF eliminates external inversion hardware for power-good indication; versus LTC2913IDDB#TRPBF, it offers lower cost and smaller footprint for single-rail monitoring but lacks dual-channel capability and extended temperature support.
Availability
LTC2912CDDB-3#TRPBF is available at Aetrix Electronics and suitable for desktop computing, network server, and industrial embedded applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LTC2912CDDB-3#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.
The LTC2912 family delivers micropower, high-accuracy voltage supervision for space-constrained systems - designed specifically for reliable UV/OV detection in computing, telecom, and industrial power rails where low quiescent current and glitch immunity are critical.
FAQ
What is the function of the LATCH pin on the LTC2912CDDB-3#TRPBF?
The LATCH pin on the LTC2912CDDB-3#TRPBF controls the behavior of the OV output: when pulled low, OV latches high upon overvoltage detection and remains asserted until LATCH is raised high; when pulled high, OV acts as a timed pulse matching UV's timeout behavior. This dual-mode flexibility enables both latched fault reporting and transient-aware monitoring in the same design using the LTC2912CDDB-3#TRPBF.
Can the LTC2912CDDB-3#TRPBF monitor a 48V supply directly?
Yes - the LTC2912CDDB-3#TRPBF can monitor a 48V supply by connecting it to the VCC pin through an external current-limiting resistor. Its internal 6.2V shunt regulator clamps VCC, allowing safe operation as long as the resistor limits current to ≤10mA. The datasheet provides calculation guidance for selecting RZ based on worst-case 48V variation, ensuring reliable LTC2912CDDB-3#TRPBF functionality without external regulators.
What is the minimum capacitor value required on the TMR pin of the LTC2912CDDB-3#TRPBF?
The TMR pin of the LTC2912CDDB-3#TRPBF requires a minimum 10pF capacitor to ground to ensure stable timeout operation. Values below this may cause erratic or shortened reset pulses. For example, a 1nF capacitor yields an 8.5ms timeout (9ms/nF scaling), while 22nF gives ~200ms - all values must be ceramic with low leakage (<1.3µA) to maintain accuracy across temperature and time, as specified for the LTC2912CDDB-3#TRPBF.
How does the LTC2912CDDB-3#TRPBF handle power-up sequencing when VCC rises from 0V?
During power-up, the LTC2912CDDB-3#TRPBF asserts UV low and OV high as soon as VCC reaches 1V, providing early fault indication. Once VCC exceeds 2.1V, the VH and VL comparators become active. An internal timer starts after valid input detection, and UV transitions high after the programmed timeout - ensuring clean, glitch-free power-good signaling. This behavior is guaranteed across the full 0°C to 70°C range for the LTC2912CDDB-3#TRPBF.
Is the exposed pad (Pin 9) on the LTC2912CDDB-3#TRPBF electrically connected?
Yes - the exposed pad (Pin 9) on the LTC2912CDDB-3#TRPBF is internally connected to GND and must be soldered to the PCB ground plane. It is not optional: doing so ensures proper thermal dissipation (θJA = 55°C/W) and electrical stability. Leaving it unconnected degrades thermal performance and may cause erratic operation, especially under sustained load. The datasheet explicitly states "EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB" for the LTC2912CDDB-3#TRPBF.
LTC2912CDDB-3#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 High
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC2912CDDB-3#TRPBF FAQ
1.How can I place an order for LTC2912CDDB-3#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2912CDDB-3#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 LTC2912CDDB-3#TRPBF reliable?
The price and inventory of LTC2912CDDB-3#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2912CDDB-3#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2912CDDB-3#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2912CDDB-3#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2912CDDB-3#TRPBF?
LTC2912CDDB-3#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2912CDDB-3#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 LTC2912CDDB-3#TRPBF?
For technical support, including LTC2912CDDB-3#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2912CDDB-3#TRPBF requirements.
6.How does Aetrix verify that LTC2912CDDB-3#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2912CDDB-3#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 LTC2912CDDB-3#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2912CDDB-3#TRPBF?
All LTC2912CDDB-3#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2912CDDB-3#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 LTC2912CDDB-3#TRPBF part is unused and in its original packaging.
Return procedure for LTC2912CDDB-3#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2912CDDB-3#TRPBF Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
