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Analog Devices Inc. LTC2915CDDB-1#TRMPBF
- Part No.:
- LTC2915CDDB-1#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2915CDDB-1#TRMPBF.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,228
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Product details
Overview
LTC2915CDDB-1#TRMPBF from Analog Devices (formerly Linear Technology) is a precision voltage supervisor IC with 27 selectable reset thresholds, designed for reliable power-on reset and supply monitoring in automotive and industrial systems. It operates from 1.5V to 5.5V, consumes only 30μA quiescent current, guarantees ±1.5% threshold accuracy over –40°C to 125°C, and features glitch-immune open-drain RST output. It is used in engine control units to monitor 1.8V microcontroller core supplies.
For engineers reviewing the LTC2915CDDB-1#TRMPBF datasheet, LTC2915CDDB-1#TRMPBF pinout, LTC2915CDDB-1#TRMPBF application, or LTC2915CDDB-1#TRMPBF equivalent, key selection criteria include its 9 nominal voltage selections (12V to ADJ), 3 tolerance options (–5%/–10%/–15%), internal 200ms reset timeout, TSOT-23/DFN package compatibility, and guaranteed RST assertion down to VCC ≥ 0.8V.
Technical Context
The LTC2915CDDB-1#TRMPBF implements a precision comparator-based supervision architecture with three-state SEL1/SEL2/TOL inputs that configure both nominal threshold and tolerance without external resistors. Its internal reference and divider matrix ensures stable trip points across temperature, while anti-glitch circuitry and programmable reset timeout (200ms default or capacitor-adjustable) prevent false resets during transient supply disturbances.
It integrates a 6.2V shunt regulator on VCC for direct operation from high-voltage rails (e.g., 12V automotive battery), requiring only a series current-limiting resistor above 5.7V. The VM input supports fixed thresholds or adjustable mode (0.5V reference), enabling accurate margining of supplies from 1V to 12V with ±1.5% guaranteed accuracy over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 1.5V to 5.5V - powers internal circuitry; supports direct connection to logic rails or regulated system supplies. |
| Threshold Accuracy | ±1.5% over –40°C to 125°C - ensures reliable reset assertion even under extreme thermal stress in automotive ECUs. |
| Quiescent Current | 30μA typical - enables always-on monitoring in battery-backed or low-power embedded systems without significant drain. |
| Reset Timeout | 200ms internal default - provides sufficient hold time for microcontroller initialization before release of RST signal. |
| VCC Undervoltage Lockout | 1.5V max - guarantees RST remains asserted until VCC stabilizes above minimum operating voltage. |
| RST Output Type | Open-drain - allows wired-OR configuration with multiple supervisors and flexible pull-up to any logic rail (e.g., 3.3V). |
| VM Input Impedance | 0.5–8MΩ - minimizes loading on monitored supply, critical when monitoring low-current LDO outputs. |
Pinout & Package
Package: 8-Lead (3mm × 2mm) Plastic DFN with optional exposed pad (Pin 9) for thermal enhancement or GND connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VM (Pin 4) | Voltage Monitor Input | High-impedance comparator input; threshold set by SEL1/SEL2/TOL; supports fixed (1.0V–12V) or adjustable (0.5V reference) modes. |
| SEL1 (Pin 3) | Nominal Threshold Select (MSB) | Three-state input (VCC/GND/open) selecting one of nine nominal voltages per Table 1; determines primary trip point. |
| TOL (Pin 2) | Tolerance Selection | Three-state input (VCC/GND/open) setting –5%, –10%, or –15% tolerance band; unique to LTC2915 family. |
| GND (Pin 1) | Ground Reference | Primary return path for internal circuitry and VM reference; exposed pad may be connected here for improved thermal performance. |
| RST (Pin 8) | Open-Drain Reset Output | Asserts low when VM falls below threshold; held low for reset timeout after recovery; requires external pull-up. |
| RT (Pin 7) | Reset Timeout Control | Configures timer: tied to VCC = ~200ms, floating = ~400μs, capacitor-to-GND = adjustable (9ms/nF). |
| SEL2 (Pin 6) | Nominal Threshold Select (LSB) | Three-state input completing 9-way voltage selection with SEL1; open/GND/VCC combinations define exact nominal value. |
| VCC (Pin 5) | Power Supply Input | Supplies internal circuitry; includes 6.2V shunt regulator for operation from >5.7V rails (e.g., 12V automotive). |
Key Features
| Feature | Design Value |
|---|---|
| 27 Selectable Thresholds | Combines 9 nominal voltages (12V to ADJ) with 3 tolerances (–5%/–10%/–15%) - eliminates need for external resistor networks and simplifies BOM across multiple supply rails. |
| Guaranteed Operation to 125°C | Rated for H-grade (–40°C to 125°C) - validated for under-hood automotive applications where ambient temperatures exceed 85°C. |
| Glitch Immunity | Combined anti-glitch circuitry + 200ms timeout prevents false resets from load transients or noise near trip point - improves system reliability in noisy environments. |
| Low-VCC Reset Assertion | RST guaranteed active down to VCC = 0.8V - ensures clean reset initiation during brown-out conditions before internal logic becomes unstable. |
| Adjustable Threshold Mode | VM accepts external resistive divider to set custom trip point at 0.5V reference - enables precise margining of non-standard supply voltages (e.g., 1.1V, 1.35V). |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring 1.8V microcontroller core supply in an engine control unit exposed to under-hood temperatures up to 125°C. IC Role / Device Role / Timing Role: Voltage supervisor asserting RST during undervoltage events; configured for 1.8V, –5% tolerance with 200ms timeout. Use Value: Prevents MCU lockup during cold cranking dips by guaranteeing reset assertion down to VCC = 0.8V and maintaining ±1.5% threshold accuracy at 125°C. |
Use Scenario: Supervising dual 3.3V and 5V rails powering FPGA configuration and analog front-end in a modular PLC I/O card. IC Role / Device Role / Timing Role: Single-supply monitor with SEL1/SEL2 reconfigured via firmware-controlled GPIOs to switch between 3.3V and 5V thresholds. Use Value: Reduces component count versus discrete resistor-based supervisors; enables dynamic rail validation without hardware changes. |
| Optical Transceiver Line Card | Medical Imaging Power Sequencer |
Use Scenario: Ensuring clean startup of 12V bias supply and 2.5V digital logic in a fiber-optic line card operating in telecom central offices. IC Role / Device Role / Timing Role: High-voltage supervisor using internal 6.2V shunt regulator; VM monitors 12V rail with –10% tolerance and 200ms timeout. Use Value: Eliminates external Zener and reduces board space vs. discrete solutions while supporting hot-swap sequencing requirements. |
Use Scenario: Validating 1.5V and 1.2V low-noise analog supplies for ADC/DAC stages in portable ultrasound equipment. IC Role / Device Role / Timing Role: Margining supervisor using ADJ mode with external divider to verify supply stability at ±15% deviation during production test. Use Value: Enables automated functional test of supply tolerance compliance without modifying hardware or adding test fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2915CTS8-1#TRPBF | Same functionality and electrical specs, but in 8-lead TSOT-23 package (2.9mm × 1.6mm) instead of DFN (3mm × 2mm). | Preferred for space-constrained layouts where height < 1mm is critical; thermal resistance θJA = 250°C/W vs. 76°C/W for DFN. | Select when PCB real estate is more constrained than thermal budget; verify layout clearance for TSOT-23 soldering. |
| LTC2916CDDB-1#TRPBF | Fixed –5% tolerance only (no TOL pin); adds manual reset (MR) input; identical DFN package and temperature grade. | Suitable for designs requiring push-button reset capability or simplified tolerance configuration; MR pin replaces TOL function. | Choose when manual reset interface is needed or tolerance flexibility is unnecessary; note pinout differs (MR replaces TOL). |
Compared with LTC2915CDDB-1#TRMPBF, the TSOT-23 variant offers smaller footprint but higher thermal resistance, while the LTC2916CDDB-1#TRPBF trades tolerance configurability for manual reset functionality - both share identical DFN mechanical compatibility and automotive-grade temperature range.
Availability
LTC2915CDDB-1#TRMPBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, optical networking line cards, and medical imaging power sequencers requiring stable component supply across extended temperature ranges.
Supply support for LTC2915CDDB-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 acquired Linear Technology in 2017 and maintains its high-reliability analog IC portfolio, emphasizing precision, robustness, and automotive qualification.
The LTC2915 series belongs to Linear's precision voltage supervisor product line, engineered specifically for mission-critical power monitoring in automotive, industrial, and telecom infrastructure where guaranteed reset behavior under thermal and electrical stress is mandatory.
FAQ
What is the operating temperature range for the LTC2915CDDB-1#TRMPBF?
The LTC2915CDDB-1#TRMPBF is rated for the commercial temperature range of 0°C to 70°C, as indicated by the "C" suffix in the part number and confirmed in the Order Information table. This distinguishes it from I-grade (–40°C to 85°C) and H-grade (–40°C to 125°C) variants. The DFN package supports this range with θJA = 76°C/W.
Does the LTC2915CDDB-1#TRMPBF support manual reset functionality?
No, the LTC2915CDDB-1#TRMPBF does not include manual reset (MR) functionality. That feature is exclusive to the LTC2916 family. The LTC2915CDDB-1#TRMPBF uses Pin 2 for the TOL (tolerance select) input, whereas the LTC2916CDDB-1#TRPBF repurposes that pin as MR. Manual reset requires switching to an LTC2916 variant.
How is the reset timeout configured on the LTC2915CDDB-1#TRMPBF?
The LTC2915CDDB-1#TRMPBF configures reset timeout via the RT pin: tying RT to VCC yields ~200ms, leaving it floating yields ~400μs, and connecting an external capacitor (CRT) to GND sets tRST ≈ 9ms/nF. For example, a 2.2nF capacitor gives ~20ms. No external components are required for the default 200ms mode.
Can the LTC2915CDDB-1#TRMPBF monitor a 12V supply directly?
Yes, the LTC2915CDDB-1#TRMPBF can monitor a 12V supply directly using its internal 6.2V shunt regulator on the VCC pin. A series current-limiting resistor must be placed between the 12V source and VCC to restrict input current to ≤5mA, calculated per the formula in the Applications Information section.
What is the purpose of the exposed pad on the DFN package of the LTC2915CDDB-1#TRMPBF?
The exposed pad (Pin 9) on the LTC2915CDDB-1#TRMPBF's DFN package is optional and may be left unconnected or soldered to PCB ground. When connected to GND, it improves thermal performance (reducing θJA) and enhances ESD robustness. It is not electrically tied to any internal node and serves solely as a thermal and mechanical aid.
LTC2915CDDB-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:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 27 Selectable Threshold Combinations
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x2)
LTC2915CDDB-1#TRMPBF FAQ
1.How can I place an order for LTC2915CDDB-1#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2915CDDB-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 LTC2915CDDB-1#TRMPBF reliable?
The price and inventory of LTC2915CDDB-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 LTC2915CDDB-1#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2915CDDB-1#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2915CDDB-1#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2915CDDB-1#TRMPBF?
LTC2915CDDB-1#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2915CDDB-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 LTC2915CDDB-1#TRMPBF?
For technical support, including LTC2915CDDB-1#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2915CDDB-1#TRMPBF requirements.
6.How does Aetrix verify that LTC2915CDDB-1#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2915CDDB-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 LTC2915CDDB-1#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2915CDDB-1#TRMPBF?
All LTC2915CDDB-1#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2915CDDB-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 LTC2915CDDB-1#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2915CDDB-1#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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