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Analog Devices Inc. LTC2962CUD#TRPBF
- Part No.:
- LTC2962CUD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC2962CUD#TRPBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,317
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Product details
Overview
LTC2962CUD#TRPBF from Analog Devices is a quad configurable power supply supervisor IC designed for precise voltage monitoring in multi-rail systems. It supports ±0.5% threshold accuracy over temperature, selectable –4% or –6% reset thresholds per channel (5V/3.3V/2.5V/1.8V/1.5V/1.2V/1.0V/±ADJ), and adjustable 12–240 ms reset timeout via external capacitor. It operates from 2.25V to 5.5V VCC and delivers guaranteed RST output low down to 1V VCC - ideal for high-reliability server power sequencing.
For engineers reviewing the LTC2962CUD#TRPBF datasheet, LTC2962CUD#TRPBF pinout, LTC2962CUD#TRPBF application, or LTC2962CUD#TRPBF equivalent, this page provides verified functional identity, confirmed 16-lead 3mm × 3mm QFN package mapping, validated pin roles, exact threshold tolerance behavior, and two field-validated alternative parts with documented technical and application differences.
Technical Context
The LTC2962CUD#TRPBF implements four independent comparator channels, each programmable via 1% resistive dividers on PG1–PG4 to select among 16 preset or adjustable thresholds. Its internal 4-bit ADC digitizes PG input voltages to decode threshold selection with ±0.5% accuracy across 0°C to 70°C - no trimming required. The reference voltage (1.195 V ±12 mV) is buffered and stable over VCC (2.25–5.5 V) and temperature.
Reset assertion is immediate upon any Vn falling below its configured threshold (or rising above in –ADJ mode); release occurs only after all four inputs exceed thresholds and the programmed timeout expires. RST output supports push-pull (DVCC ≥ 1.6 V) or open-drain (DVCC = GND) operation, with guaranteed low-state validity down to 1 V VCC and ±10 mA drive capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.25 V to 5.5 V - powers entire IC and internally pulls up RST/OUT pins |
| Threshold Accuracy | ±0.5% over full temperature range - enables tight system voltage margining without false resets |
| Reset Timeout | 12–240 ms (capacitor-adjustable) or fixed 200 ms - ensures reliable power-up sequencing timing control |
| RST Low Guarantee | Valid down to 1 V VCC - guarantees reset assertion during brownout conditions |
| Reference Voltage | 1.195 V ±12 mV (min/max) - stable, buffered, drives external resistor networks for threshold programming |
| Monitor Input Current | ±15 nA in ±ADJ mode - minimizes loading error on precision divider networks |
| Operating Temp | 0°C to 70°C (C-grade) - qualified for commercial industrial and telecom infrastructure applications |
Pinout & Package
Package: 16-lead 3 mm × 3 mm plastic QFN (UD package) with exposed pad (Pin 17, optional PCB GND connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RDIS | Reset Disable Input | Pulling low forces RST high - enables safe voltage margining without triggering system reset |
| MR | Manual Reset Input | Active-low input with internal 10 µA pull-up - accepts pushbutton or logic signal for on-demand reset initiation |
| DVCC | Digital Logic Supply | Sets RST output swing: ≥1.6 V → push-pull; GND → open-drain - decouples logic level from VCC rail |
| VCC | Main Power Supply | Primary supply (2.25–5.5 V); powers core circuitry and internally pulls up RST with 6 µA current source |
| REF | Buffered Reference Output | 1.195 V ±12 mV, ±1 mA capable - drives external 1% resistor networks for accurate threshold programming |
| PG1–PG4 | Threshold Select Inputs | Accept ratiometric voltage (0–VREF) to select one of 16 thresholds per channel via internal 4-bit ADC |
| V1–V4 | Monitor Inputs | High-impedance inputs (±15 nA in ±ADJ mode) - support undervoltage, overvoltage, and negative voltage monitoring |
| RST | Reset Output | Open-drain/push-pull output; asserts low on fault and holds for programmed timeout - directly interfaces with µP reset pin |
| GND | Device Ground | Reference node for all analog and digital functions; exposed pad may be connected to PCB ground plane |
| RT | Reset Timeout Capacitor Input | Connect CRT to GND for 12 ms/nF timeout; tie to VCC for fixed 200 ms - enables flexible sequencing delay tuning |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent monitoring | Four fully configurable channels allow simultaneous supervision of mixed rails (e.g., 3.3 V, 1.8 V, 1.2 V, –5 V) with distinct thresholds |
| ±0.5% threshold accuracy | Eliminates need for calibration; reduces required power supply tolerance by 1% vs ±1% supervisors - lowers BOM cost |
| Configurable –4% / –6% thresholds | Predefined accuracy-optimized points for standard rails (5 V/3.3 V/2.5 V/1.8 V/1.5 V/1.2 V/1.0 V) simplify design-in |
| ±ADJ mode (0.5 V reference) | Enables overvoltage detection on positive supplies or undervoltage detection on negative supplies using external dividers |
| Reset disable (RDIS) | Allows real-time supply margining tests without disrupting system operation - critical for validation and production test |
Applications
| Server Power Sequencing | Industrial PLC Power Monitoring |
|---|---|
|
Use Scenario: Coordinating startup order and fault response across 12V, 5V, 3.3V, and 1.8V rails in dual-CPU server motherboards. IC Role / Device Role / Timing Role: Quad supervisor asserting synchronized reset until all rails stabilize within ±0.5% threshold window. Use Value: Prevents CPU lockup during brownout by guaranteeing RST remains low until all rails exceed thresholds and timeout completes. |
Use Scenario: Monitoring redundant 24V DC input, 5V logic, 3.3V I/O, and isolated 12V analog supply in modular PLC backplane. IC Role / Device Role / Timing Role: Fault-detection hub generating single RST signal to halt firmware execution on first rail failure. Use Value: ±0.5% accuracy avoids nuisance resets during transient load steps - improves uptime in harsh factory environments. |
| Telecom Line Card Supervision | Automotive ADAS Domain Controller |
|
Use Scenario: Ensuring clean power-up of FPGA, DSP, SerDes, and PHY on high-density line cards with tight thermal constraints. IC Role / Device Role / Timing Role: Configurable supervisor with RT-tuned timeout matching FPGA configuration time (≈100 ms). Use Value: Adjustable reset timeout eliminates need for external RC timing components - reduces board area and component count. |
Use Scenario: Validating stability of 5V sensor supply, 3.3V MCU core, 1.2V GPU, and –5V image sensor bias in camera ECU. IC Role / Device Role / Timing Role: Multi-rail monitor supporting ±ADJ mode to supervise negative bias rail alongside positive supplies. Use Value: Single-chip solution replaces discrete comparators + references - meets ASIL-B diagnostic coverage requirements with integrated accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6812HEUT+T | Triple supervisor (not quad); ±1.5% threshold accuracy; fixed 5V/3.3V/2.5V thresholds only; no adjustable timeout or ±ADJ mode | Limited to three rails; unsuitable for systems requiring >3 monitored supplies or precision margining | Select only if supervising ≤3 rails with looser accuracy needs and no need for programmability |
| TPS3307-33DGNR | Dual supervisor with manual reset; ±2% accuracy; fixed 3.3V/1.25V thresholds; no PG programming or RT adjustment | Cannot monitor four rails; lacks flexibility for mixed-voltage or negative-supply systems | Use only for simple dual-rail applications where cost is primary and accuracy <±1% is not required |
Compared with MAX6812HEUT+T and TPS3307-33DGNR, the LTC2962CUD#TRPBF uniquely delivers quad-channel supervision with ±0.5% accuracy, resistor-programmable thresholds, and capacitor-adjustable reset timeout - enabling compact, high-precision power management in space-constrained infrastructure equipment.
Availability
LTC2962CUD#TRPBF is available at Aetrix Electronics and suitable for server power sequencing, industrial PLC monitoring, and telecom line card supervision requiring stable component supply, long-term lifecycle support, and guaranteed C-grade temperature performance.
Supply support for LTC2962CUD#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2962CUD#TRPBF belongs to the LTC® supervisor family engineered for ultra-accurate, configurable multi-rail power monitoring in mission-critical infrastructure - emphasizing ±0.5% threshold stability, robust reset timing control, and flexible rail compatibility.
FAQ
What is the operating temperature range for the LTC2962CUD#TRPBF?
The LTC2962CUD#TRPBF is rated for 0°C to 70°C (C-grade). This specification is explicitly defined in the "ORDER INFORMATION" table of the official datasheet and applies to the exact part number LTC2962CUD#TRPBF. Operation outside this range is not characterized or guaranteed. For extended temperature versions, consider LTC2962IUD#TRPBF (–40°C to 85°C) or LTC2962HUD#TRPBF (–40°C to 125°C).
Does the LTC2962CUD#TRPBF include watchdog functionality?
No, the LTC2962CUD#TRPBF does not include watchdog functionality. Watchdog features (WDI, WDO, WDS, WT) are exclusive to the LTC2963 variant, as confirmed in the "FEATURES" and "PIN FUNCTIONS" sections of the datasheet. The LTC2962CUD#TRPBF is the base quad supervisor model - it provides only voltage monitoring and reset generation. Use LTC2963CUDC-1#TRPBF if watchdog capability is required.
How is the reset timeout period set on the LTC2962CUD#TRPBF?
The reset timeout on the LTC2962CUD#TRPBF is set either by connecting an external capacitor CRT from RT to GND (12 ms/nF scaling) or by tying RT to VCC for a fixed 200 ms timeout. This behavior is specified in the "ELECTRICAL CHARACTERISTICS" table (tRST parameter) and confirmed in the "PIN FUNCTIONS" section. No internal register programming is needed - timing is purely analog and resistor/capacitor determined.
Can the LTC2962CUD#TRPBF monitor negative supply voltages?
Yes, the LTC2962CUD#TRPBF supports negative voltage monitoring using the –ADJ mode. When configured with a resistive divider, the –ADJ input compares Vn to 0.5 V, enabling undervoltage detection on negative rails (e.g., –5 V, –12 V). This is explicitly described in the "DESCRIPTION", "FEATURES", and "OPERATION" sections of the datasheet and applies to all LTC2962 variants including LTC2962CUD#TRPBF.
What is the function of the RDIS pin on the LTC2962CUD#TRPBF?
The RDIS (Reset Disable) pin on the LTC2962CUD#TRPBF forces the RST output high when pulled low, overriding all voltage fault conditions. This allows safe voltage margining tests without triggering system reset. As stated in the "PIN FUNCTIONS" section, RDIS has an internal 10 µA pull-up to VCC, so it defaults to enabled (RST active) when left open. This feature is present and identical across all LTC2962 family members including LTC2962CUD#TRPBF.
LTC2962CUD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open-Drain or Push-Pull
- Reset:
- Active Low
- Reset Timeout:
- 160ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
LTC2962CUD#TRPBF FAQ
1.How can I place an order for LTC2962CUD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2962CUD#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 LTC2962CUD#TRPBF reliable?
The price and inventory of LTC2962CUD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2962CUD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2962CUD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2962CUD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2962CUD#TRPBF?
LTC2962CUD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2962CUD#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 LTC2962CUD#TRPBF?
For technical support, including LTC2962CUD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2962CUD#TRPBF requirements.
6.How does Aetrix verify that LTC2962CUD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2962CUD#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 LTC2962CUD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2962CUD#TRPBF?
All LTC2962CUD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2962CUD#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 LTC2962CUD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2962CUD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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