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Analog Devices Inc. LTC2900-1CDD#TRPBF
- Part No.:
- LTC2900-1CDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2900-1CDD#TRPBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,957
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Product details
Overview
LTC2900-1CDD#TRPBF from Analog Devices (acquired Linear Technology) is a programmable quad supply monitor IC with open-drain RST output, simultaneously monitoring up to four voltage rails (e.g., 5V, 3.3V, 2.5V, 1.8V), ±1.5% threshold accuracy over temperature, 43µA typical supply current, and adjustable reset timeout via external capacitor. It is used in multivoltage server power systems to ensure reliable power-on reset sequencing.
For engineers reviewing the LTC2900-1CDD#TRPBF datasheet, LTC2900-1CDD#TRPBF pinout, LTC2900-1CDD#TRPBF application, or LTC2900-1CDD#TRPBF equivalent, this page delivers verified pin functions, real-world timing behavior, confirmed voltage threshold combinations, and validated alternatives for quad-rail supervision in telecom and computing infrastructure.
Technical Context
The LTC2900-1CDD#TRPBF implements four independent high-accuracy comparators with user-programmable thresholds selected via a 1% resistor divider on VPG, supporting 16 preset combinations of 5V/3.3V/3V/2.5V/1.8V/1.5V and ±adjustable modes. Its internal bandgap reference (1.210V ±0.018V) enables precise trip-point generation across –40°C to 85°C.
Reset assertion is guaranteed for VCC ≥ 1V; the open-drain RST output pulls low when any monitored rail falls below its threshold and remains asserted for the CRT-capacitor–programmed delay (5–9ms typ with 1500pF). Manual reset via PBR provides debounced, capacitor-timed pulse generation without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Monitoring Channels | 4 independent inputs (V1–V4), each configurable to fixed or adjustable thresholds |
| Threshold Accuracy | ±1.5% over full operating temperature range (0°C to 70°C for C-grade) |
| Quiescent Current | 43µA typical - enables use in battery-backed or ultra-low-power systems |
| RST Output Type | Open-drain with weak internal pull-up to V2 (6µA typ), supports external pull-up for faster rise or higher VOH |
| Reset Timeout Range | 5–9ms typical with 1500pF CRT capacitor; scalable from ~50µs (open pin) to seconds via capacitance |
| Minimum Operating VCC | 1V - ensures valid RST state during brownout down to critical supply level |
| Voltage Input Range | V1/V2: –0.3V to 7V; V3/V4: –0.3V to (VCC + 0.3V); supports positive/negative adjustable sensing |
Pinout & Package
Package: 10-lead 3mm × 3mm plastic DFN (exposed pad), RoHS-compliant, θJA = 43°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V3 (Pin 1) | Voltage input 3 | Configurable threshold: 2.5V, 1.8V, 1.5V, or ADJ/–ADJ mode per VPG programming |
| V1 (Pin 2) | Voltage input 1 | Primary supply input; selects 5V or 3.3V threshold; greater of V1/V2 sets internal VCC |
| CRT (Pin 3) | Reset timer capacitor connection | Capacitor-to-GND sets reset timeout (tRST ≈ 217pF/ms); open = ~50µs min delay |
| RST (Pin 4) | Active-low reset output | Open-drain output pulled low on fault; weak internal pull-up to V2 (LTC2900-1 only) |
| PBR (Pin 5) | Manual reset input | Logic-low active; internally debounced using CRT timing; weak pull-up allows floating |
| GND (Pin 6) | Ground reference | System ground return; exposed thermal pad must be soldered for thermal performance |
| VPG (Pin 7) | Threshold programming input | Accepts 0–1.21V ratiometric voltage from 1% resistor divider to select one of 16 modes |
| VREF (Pin 8) | Buffered reference output | 1.210V ±0.018V, ±1mA capable; used for VPG divider and negative-adjustable offset |
| V4 (Pin 9) | Voltage input 4 | Configurable threshold: 1.8V, 1.5V, ADJ, or –ADJ; supports negative rail monitoring |
| V2 (Pin 10) | Voltage input 2 | Selects 3.3V, 3V, or 2.5V threshold; greater of V1/V2 powers internal circuitry and pulls up RST |
Key Features
| Feature | Design Value |
|---|---|
| 16-programmable threshold combinations | Single-pin (VPG) resistor-divider selection eliminates firmware or configuration registers |
| Guaranteed RST validity down to VCC = 1V | Ensures deterministic reset state during deep brownout - no undefined logic levels |
| Power supply glitch immunity | Built-in comparator hysteresis and filtering prevent false resets from transient noise |
| Manual reset with integrated debounce | PBR pin uses same CRT capacitor for timing - no external RC or logic required |
| Support for negative voltage monitoring | –ADJ mode on V4 enables reliable supervision of –5V, –12V rails using VREF-referenced divider |
Applications
| Desktop & Notebook Computers | Telecom Equipment |
|---|---|
|
Use Scenario: Simultaneous monitoring of CPU core (1.2V), memory (1.5V), I/O (3.3V), and auxiliary (5V) rails during boot and runtime. IC Role / Device Role / Timing Role: Quad-rail supervisor asserting system-wide reset until all supplies stabilize within ±1.5% tolerance. Use Value: Prevents firmware corruption by guaranteeing microprocessor release only after all rails meet spec - validated at 0°C to 70°C. |
Use Scenario: Supervision of redundant 3.3V, 5V, ±12V, and backup battery rails in line cards and baseband units. IC Role / Device Role / Timing Role: Fault-detection engine triggering failover and alarm signals upon undervoltage on any rail. Use Value: Enables hot-swap compliance and graceful shutdown via programmable tRST (e.g., 216ms with 47nF CRT). |
| Network Servers | Portable Battery-Powered Equipment |
|
Use Scenario: Coordinating power sequencing across CPU, GPU, PHY, and management controller rails in 1U/2U servers. IC Role / Device Role / Timing Role: Centralized reset arbiter with manual reset (PBR) for service-mode recovery. Use Value: Reduces BOM count vs discrete supervisors; 43µA quiescent current minimizes standby drain. |
Use Scenario: Monitoring main Li-ion (3.7V), regulated 3.3V, LDO 1.8V, and USB 5V rails in medical handhelds or test instruments. IC Role / Device Role / Timing Role: Low-power supervisor enabling wake-from-sleep reset with sub-100µs response (tUV = 150µs). Use Value: Extends battery life while maintaining robustness against supply transients common in portable environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2902CMS#PBF | Includes supply margining and tolerance adjustment features; 16-lead narrow SSOP package | Required where dynamic supply validation (e.g., ±5% margin testing) is needed alongside supervision | Choose LTC2902 when margining capability is essential; not drop-in due to pin count and package mismatch |
| LTC2901CMS#PBF | Adds watchdog timer function; same 16-lead SSOP package; otherwise identical supervision architecture | Suitable for systems requiring both power-good monitoring and CPU watchdog timeout enforcement | Choose LTC2901 if watchdog functionality is mandatory; requires PCB redesign for 16-pin footprint |
Compared with LTC2900-1CDD#TRPBF, LTC2902 adds margining control but increases complexity and package size, while LTC2901 integrates watchdog capability at the cost of pin compatibility - neither offers pin-for-pin replacement, but both share the same core quad-monitoring accuracy and programming methodology.
Availability
LTC2900-1CDD#TRPBF is available at Aetrix Electronics and suitable for desktop computers, telecom equipment, and network servers requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across commercial temperature range (0°C to 70°C).
Supply support for LTC2900-1CDD#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 acquired Linear Technology in 2017 and maintains full product support, datasheets, and application engineering for legacy Linear parts including the LTC series.
The LTC2900 family was designed specifically for high-accuracy, low-power quad-voltage supervision in space-constrained multirail systems - emphasizing threshold stability, glitch immunity, and flexible configuration without software overhead.
FAQ
What is the guaranteed reset threshold accuracy of the LTC2900-1CDD#TRPBF over temperature?
The LTC2900-1CDD#TRPBF guarantees ±1.5% threshold accuracy over its full operating temperature range (0°C to 70°C). This applies to all preset thresholds (e.g., 5V, 3.3V, 2.5V) and adjustable modes, as confirmed in the Electrical Characteristics table under "VRT50", "VRT33", etc., with "G" notation indicating guaranteed over temperature.
Does the LTC2900-1CDD#TRPBF support monitoring of negative supply voltages?
Yes - the LTC2900-1CDD#TRPBF supports negative voltage monitoring via the –ADJ mode on V4 (Pin 9). When configured using the recommended resistor divider (e.g., R3/R4 from Table 3), it accurately detects undervoltage on rails such as –5V or –12V by referencing VREF (1.210V) to shift the comparator offset, as detailed in Figure 6 and Application Information section.
What is the minimum VCC required for valid RST output operation in the LTC2900-1CDD#TRPBF?
The LTC2900-1CDD#TRPBF guarantees correct RST logic state for VCC ≥ 1V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures reliable reset assertion during brownout conditions well below nominal supply levels - critical for fail-safe system behavior.
How is the reset timeout period programmed on the LTC2900-1CDD#TRPBF?
The reset timeout period (tRST) is programmed by connecting an external capacitor (CRT) between Pin 3 (CRT) and GND. The relationship is tRST ≈ CRT × 217 × 10⁹ (CRT in farads, tRST in seconds), or equivalently 217 pF per millisecond. A 47nF capacitor yields ~216ms delay, as shown in Typical Application TA01.
What package type and lead count does the LTC2900-1CDD#TRPBF use?
The LTC2900-1CDD#TRPBF uses a 10-lead plastic DFN package measuring 3mm × 3mm with exposed thermal pad (package code DD), as documented in Package Description section and drawing #05-08-1699. It is distinct from the MSOP variant (CMS suffix) and requires corresponding PCB land pattern per recommended solder pad dimensions.
LTC2900-1CDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 16 Selectable Threshold Combinations
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 5ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
LTC2900-1CDD#TRPBF FAQ
1.How can I place an order for LTC2900-1CDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2900-1CDD#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 LTC2900-1CDD#TRPBF reliable?
The price and inventory of LTC2900-1CDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2900-1CDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2900-1CDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2900-1CDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2900-1CDD#TRPBF?
LTC2900-1CDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2900-1CDD#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 LTC2900-1CDD#TRPBF?
For technical support, including LTC2900-1CDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2900-1CDD#TRPBF requirements.
6.How does Aetrix verify that LTC2900-1CDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2900-1CDD#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 LTC2900-1CDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2900-1CDD#TRPBF?
All LTC2900-1CDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2900-1CDD#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 LTC2900-1CDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2900-1CDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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