My Inquiry
My Account
Analog Devices Inc. LTC2911CDDB-4#TRPBF
- Part No.:
- LTC2911CDDB-4#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2911CDDB-4#TRPBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,918
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2911CDDB-4#TRPBF from Analog Devices (formerly Linear Technology) is a precision triple supply monitor IC with integrated power-fail comparator and latched reset control. It monitors 3.3V (V1), 1.2V (V2), and an adjustable input (ADJ) with ±1.5% threshold accuracy over 0°C to 70°C, supports internal 200ms reset timeout, and operates down to 0.5V VCC for reliable power-up sequencing in embedded power management systems.
For engineers reviewing the LTC2911CDDB-4#TRPBF datasheet, LTC2911CDDB-4#TRPBF pinout, LTC2911CDDB-4#TRPBF application, or LTC2911CDDB-4#TRPBF equivalent, key selection criteria include its fixed 1.2V V2 threshold, DFN-8 (3mm × 2mm) package, PFI-configurable early power-fail warning, TMR latch capability for margin testing, and guaranteed operation at ultralow 0.5V supply voltage.
Technical Context
The LTC2911CDDB-4#TRPBF implements three independent voltage comparators - one fixed at 3.3V (V1), one fixed at 1.2V (V2), and one adjustable via external resistor divider on ADJ (nominal 0.5V threshold). Its power-fail comparator uses PFI with 500mV falling/515mV rising thresholds and 3% hysteresis for noise-immune detection.
Reset assertion is synchronized across all three monitored inputs with glitch filtering and configurable timeout (internal 200ms or external capacitor). The TMR pin enables latch mode for margin testing, and RST/PFO outputs feature weak pull-ups to V1 with guaranteed low-state drive down to VCC = 0.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| V1 Threshold | 3.086V ±1.5% - precisely monitors 3.3V rail with no external components |
| V2 Threshold | 1.122V ±1.5% - factory-set for 1.2V supply, eliminates calibration effort |
| ADJ Threshold | 500mV ±1.5% - enables resistive divider configuration of third supply threshold |
| PFI Threshold | 500mV falling / 515mV rising - provides hysteresis for stable power-fail detection |
| Reset Timeout | 200ms (internal) or 15–27ms (external CTMR=2.2nF) - ensures clean system initialization |
| Supply Current | 30µA typical - enables always-on monitoring in battery-backed systems |
| Min Operating VCC | 0.5V - guarantees RST/PFO low-state integrity during brownout and power ramp-up |
Pinout & Package
Package: 8-lead (3mm × 2mm) plastic DFN with exposed pad (pin 9, GND). Compact footprint supports high-density PCB layouts and thermal performance (θJA = 76°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PFI | Power-fail input | Accepts resistive divider output; triggers PFO low when voltage falls below 500mV |
| 2 - ADJ | Adjustable monitor input | High-impedance node with 500mV threshold; configures third supply trip point |
| 3 - TMR | Reset timeout/latch control | Tie to V1 for 200ms internal timeout; pull to GND to latch RST state |
| 4 - GND | Device ground reference | Primary return path; exposed pad (pin 9) must be connected to GND for thermal/signal integrity |
| 5 - RST | Reset logic output | Open-drain output pulled up to V1; asserts low if any monitored supply drops below threshold |
| 6 - PFO | Power-fail logic output | Open-drain output pulled up to V1; signals early warning of primary supply collapse |
| 7 - V1 | 3.3V monitor & supply input | Monitors 3.3V rail; supplies internal VCC and RST/PFO pull-up current |
| 8 - V2 | 1.2V monitor input | Fixed 1.2V threshold input; no external components required for 1.2V rail monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Triple simultaneous monitoring | Simultaneously supervises 3.3V, 1.2V, and user-defined supply without external comparators or timing circuitry |
| ±1.5% threshold accuracy | Reduces system voltage margin requirements by >30% vs. ±3% supervisors, improving design headroom |
| Configurable power-fail warning | PFI input allows precise setting of early shutdown threshold (e.g., 4.5V on 5V rail) via resistor divider |
| Reset latch for margin testing | TMR pin enables hardware-based hold of RST state, eliminating software intervention during voltage stress tests |
| Ultralow 0.5V VCC operation | Ensures deterministic RST/PFO low-state behavior during deep brownout, preventing metastability in downstream logic |
Applications
| Server Power Sequencing | Industrial PLC I/O Module |
|---|---|
Use Scenario: Coordinating startup of CPU core, memory, and peripheral rails in 1U rack servers with tight timing budgets. IC Role / Device Role / Timing Role: Triple-supply monitor enforcing strict power-on order and validating rail stability before releasing processor reset. Use Value: Eliminates need for discrete RC timers and multiple supervisor ICs; 200ms internal timeout ensures consistent boot timing across units. | Use Scenario: Monitoring isolated 3.3V logic, 24V field power, and 1.2V FPGA core in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: ADJ input configured via resistor divider to supervise 24V field supply; PFI monitors main 24V input for predictive shutdown. Use Value: Single-chip solution replaces two discrete supervisors; PFO-driven NMI enables <100µs response to input collapse, preserving I/O state. |
| Automotive Infotainment Head Unit | Battery-Powered Medical Sensor |
Use Scenario: Validating 3.3V MCU, 1.2V SoC core, and adjustable 5V display backlight supply in AEC-Q200-compliant infotainment systems. IC Role / Device Role / Timing Role: LTC2911CDDB-4#TRPBF variant selected for commercial temperature grade; ADJ monitors buck-boost output feeding LCD driver. Use Value: ±1.5% threshold accuracy prevents false resets during cold-cranking transients; latch mode simplifies ECU-level voltage margin validation. | Use Scenario: Ensuring reliable operation of ultra-low-power ECG front-end ASIC powered by coin-cell battery and regulated 3.3V/1.2V rails. IC Role / Device Role / Timing Role: Monitors 3.3V analog supply (V1), 1.2V digital core (V2), and battery voltage (ADJ via divider); PFI tracks battery decay. Use Value: 30µA quiescent current extends battery life; 0.5V VCC operation guarantees reset assertion even as battery discharges to 1.8V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6369KA+T | Fixed 3.3V/2.5V/1.8V thresholds; no adjustable ADJ input; 140ms fixed timeout | Lacks PFI configurability and latch mode; suitable only for fixed-rail systems without early-warning needs | Select when ADJ flexibility and power-fail warning are unnecessary and board space permits larger SO-8 package |
| TPS3808G33DBVR | Single 3.3V monitor with adjustable delay; no V2/ADJ/PFI capability; 35µA IQ | Requires three separate ICs to match LTC2911CDDB-4#TRPBF functionality; no power-fail signaling | Choose only for simple single-rail supervision where cost per channel outweighs integration benefits |
Compared with MAX6369KA+T and TPS3808G33DBVR, the LTC2911CDDB-4#TRPBF delivers integrated triple monitoring, configurable power-fail warning, and latch-enabled margin testing in a space-saving DFN-8 package - reducing BOM count by 2–3 devices while enabling advanced power management features not available in alternatives.
Availability
LTC2911CDDB-4#TRPBF is available at Aetrix Electronics and suitable for server power sequencing, industrial PLC I/O modules, automotive infotainment head units, and battery-powered medical sensors requiring stable component supply across extended production lifecycles.
Supply support for LTC2911CDDB-4#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2911 family was designed specifically for precision multi-rail power monitoring in space-constrained, reliability-critical systems - emphasizing threshold accuracy, ultralow-voltage operation, and configurability without external timing components.
FAQ
What is the exact V2 threshold voltage for LTC2911CDDB-4#TRPBF?
The LTC2911CDDB-4#TRPBF has a factory-trimmed V2 threshold of 1.122V ±1.5% over the full 0°C to 70°C operating range, corresponding to a –6.5% undervoltage trip point for a nominal 1.2V supply. This value is specified in the Electrical Characteristics table under VRT12 parameter and is guaranteed without external calibration.
Can LTC2911CDDB-4#TRPBF monitor a 5V supply on the V2 pin?
No - LTC2911CDDB-4#TRPBF is the -4 variant, which fixes V2 to monitor 1.2V supplies only. To monitor 5V, select LTC2911CDDB-1#TRPBF. The part number suffix (-1 through -5) defines the V2 threshold; mixing variants risks incorrect reset behavior due to mismatched trip points.
How does the TMR pin function in latch mode for LTC2911CDDB-4#TRPBF?
When the TMR pin of LTC2911CDDB-4#TRPBF is pulled to GND, the current RST state (high or low) is latched and held regardless of subsequent input voltage changes. Releasing TMR restores normal monitoring after tSU,MON (2ms setup time), with RST transitioning based on real-time V1/V2/ADJ status and timeout conditions.
What is the maximum recommended leakage current for the external capacitor on the TMR pin of LTC2911CDDB-4#TRPBF?
The external capacitor on the TMR pin of LTC2911CDDB-4#TRPBF must exhibit ≤500nA leakage current to maintain timer accuracy. Ceramic capacitors (e.g., X7R, C0G) are recommended; electrolytic or high-leakage dielectrics will cause significant timeout drift or failure to assert reset.
Does LTC2911CDDB-4#TRPBF require external pull-up resistors on RST and PFO pins?
LTC2911CDDB-4#TRPBF provides internal weak pull-ups to V1 (typically 29µA at V1=3.3V), sufficient for most microcontroller reset inputs. External pull-ups are optional - used only when faster rise times or VOH > V1 are required; they must connect to a voltage ≤6.5V and not interfere with the internal pull-up path.
LTC2911CDDB-4#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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.122V, 3.086V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC2911CDDB-4#TRPBF FAQ
1.How can I place an order for LTC2911CDDB-4#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2911CDDB-4#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 LTC2911CDDB-4#TRPBF reliable?
The price and inventory of LTC2911CDDB-4#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2911CDDB-4#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2911CDDB-4#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2911CDDB-4#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2911CDDB-4#TRPBF?
LTC2911CDDB-4#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2911CDDB-4#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 LTC2911CDDB-4#TRPBF?
For technical support, including LTC2911CDDB-4#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2911CDDB-4#TRPBF requirements.
6.How does Aetrix verify that LTC2911CDDB-4#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2911CDDB-4#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 LTC2911CDDB-4#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2911CDDB-4#TRPBF?
All LTC2911CDDB-4#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2911CDDB-4#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 LTC2911CDDB-4#TRPBF part is unused and in its original packaging.
Return procedure for LTC2911CDDB-4#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2911CDDB-4#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…
