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Analog Devices Inc. LTC2900-1CMS#TRPBF
- Part No.:
- LTC2900-1CMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2900-1CMS#TRPBF.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,463
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Product details
Overview
LTC2900-1CMS#TRPBF from Analog Devices (acquired Linear Technology) is a programmable quad supply monitor IC with open-drain RST output, simultaneously supervising 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 LTC2900-1CMS#TRPBF datasheet, LTC2900-1CMS#TRPBF pinout, LTC2900-1CMS#TRPBF application, or LTC2900-1CMS#TRPBF equivalent, key selection criteria include guaranteed RST assertion down to VCC = 1V, manual reset input with debounced timing, 16 programmable voltage threshold combinations, and compatibility with MSOP-10 packaging for space-constrained PCB layouts.
Technical Context
The LTC2900-1CMS#TRPBF implements four independent high-accuracy comparators referenced to a buffered 1.210V internal bandgap, each comparing an input rail (V1–V4) against a user-selected threshold set by a resistor divider on VPG. Threshold selection supports fixed (5V/3.3V/2.5V/1.8V/1.5V) and adjustable (±ADJ) modes with ±1.5% tolerance across –40°C to 85°C.
Reset logic combines undervoltage detection, CRT-capacitor–programmed delay (5–9ms typ with 1500pF), and manual reset via PBR pin. The open-drain RST output pulls low when any monitored rail falls below its threshold and remains asserted for the full tRST period after all rails recover; internal weak pull-up to V2 ensures defined state during power-up/down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 43µA typical - enables use in battery-backed or ultra-low-power systems without compromising supervision integrity. |
| Threshold Accuracy | ±1.5% over temperature - guarantees precise reset assertion across industrial operating range without calibration. |
| RST Output Type | Open-drain with weak internal pull-up to V2 - allows flexible level-shifting and wired-OR reset bus implementation. |
| Minimum VCC for RST Validity | 1V - ensures reset signal remains active and well-defined even during deep brownout conditions. |
| Reset Timeout Range | 5ms to >1s (via CRT capacitor) - supports microprocessor reset hold times from fast logic to complex boot sequences. |
| Input Voltage Range | V1–V4: –0.3V to 7V - accommodates positive rails, negative rails (–ADJ mode), and transient overshoot without damage. |
| Manual Reset Pulse Width | ≥150ns minimum - compatible with standard tactile switch bounce characteristics without external debouncing. |
Pinout & Package
Package: 10-lead MSOP (3mm × 3mm, 0.5mm pitch), RoHS-compliant, exposed pad for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V1 | Primary voltage input (5V or 3.3V) | Also defines VCC if ≥ V2; must be bypassed with ≥0.1µF capacitor to GND for stable internal operation. |
| V2 | Secondary voltage input (3.3V, 3V, or 2.5V) | Defines VCC if > V1; provides internal pull-up reference for RST output in LTC2900-1 variant. |
| CRT | Reset timeout programming node | Capacitor-to-GND sets tRST ≈ 4.6ms/nF; open-circuit yields ~50µs minimum delay. |
| RST | Active-low reset output | Open-drain; sinks ≥2.5mA at VOL ≤ 0.4V; internal pull-up to V2 (~6µA typ) - requires external pull-up for faster rise or higher VOH. |
| PBR | Manual reset input | Active-low; internally pulled up; falling edge initiates full tRST reset pulse - debounced via CRT timing circuitry. |
| GND | Analog and digital ground reference | Common return for all inputs, outputs, and internal circuitry; must be low-impedance connection. |
| VPG | Threshold programming input | Accepts resistor-divider ratio (0–1.0×VREF) to select one of 16 preset/adjustable voltage monitoring configurations. |
| VREF | Buffered 1.210V reference output | Sources/sinks ±1mA; drives VPG divider and negative-adjustable circuits; stable over temperature and load. |
| V3 | Tertiary voltage input (2.5V, 1.8V, 1.5V, or ADJ) | High-impedance input; supports positive adjustable mode using external divider referenced to 0.5V offset. |
| V4 | Quaternary voltage input (1.8V, 1.5V, ADJ, or –ADJ) | Supports both positive adjustable (0.5V offset) and negative adjustable (referred to VREF) sensing topologies. |
Key Features
| Feature | Design Value |
|---|---|
| 16 programmable voltage threshold combinations | Single-pin resistor-divider programming eliminates configuration jumpers or firmware setup - reduces BOM count and layout complexity. |
| Guaranteed RST validity down to VCC = 1V | Ensures deterministic reset behavior during brownout and power-fail events where other supervisors may release prematurely. |
| Power supply glitch immunity | Internal filtering prevents false resets from sub-150µs transients - critical for noisy DC/DC converter environments. |
| Adjustable reset timeout with external capacitor | Enables precise matching to processor reset requirements (e.g., 100ms for ARM Cortex-A, 216ms for x86 BIOS) without redesign. |
| Manual reset with integrated debouncing | Eliminates need for external RC networks or digital debounce logic - simplifies front-panel reset button implementation. |
| ±1.5% threshold accuracy over temperature | Reduces design margining overhead and avoids costly requalification when ambient or self-heating varies. |
Applications
| Desktop & Notebook Computers | Telecom Equipment |
|---|---|
|
Use Scenario: Monitoring 5V, 3.3V, 2.5V, and 1.8V rails in CPU core, memory, I/O, and chipset power domains. IC Role / Device Role / Timing Role: Quad-supply supervisor ensuring synchronized power-on reset and brownout protection across heterogeneous voltage domains. Use Value: Prevents lockup or corruption during asymmetric rail ramp-up by holding RST until all four supplies exceed their ±1.5% accurate thresholds. |
Use Scenario: Supervising redundant 3.3V, 5V, ±12V, and –48V bias rails in line cards and baseband processing units. IC Role / Device Role / Timing Role: High-accuracy voltage monitor supporting both positive and negative rails via ADJ/–ADJ modes with single-chip integration. Use Value: Enables detection of –48V failure (using –ADJ mode with VREF-referenced divider) while concurrently monitoring three positive rails - reduces component count vs discrete solutions. |
| Network Servers | Portable Battery-Powered Equipment |
|
Use Scenario: Ensuring clean boot sequence for dual-CPU, DDR4, PCIe, and BMC subsystems powered from multiple isolated DC/DC converters. IC Role / Device Role / Timing Role: Centralized reset generator with programmable tRST (e.g., 216ms via 47nF CRT) aligned to BIOS POST timing requirements. Use Value: Guarantees RST remains asserted throughout entire power-rail stabilization window - eliminates premature release causing boot failures. |
Use Scenario: Monitoring 3.3V system rail, 2.5V sensor interface, 1.8V RF section, and 0.9V low-power MCU core in handheld medical devices. IC Role / Device Role / Timing Role: Ultra-low-quiescent-current (43µA) quad supervisor extending battery life while maintaining robust fault coverage. Use Value: Delivers <100µA total supervision current - critical for multi-week standby operation in energy-harvesting or coin-cell–powered designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2902IMS#TRPBF | Includes supply tolerance monitoring and margining functions; 16-lead SSOP package; higher pin count and feature set. | Required for systems needing dynamic voltage margin testing (e.g., ASIC validation), not just static supervision. | Select LTC2902IMS#TRPBF only if tolerance/margining capability is explicitly needed - adds cost and board area vs LTC2900-1CMS#TRPBF. |
| LTC2901IMS#TRPBF | Features adjustable watchdog timer in addition to programmable reset; same 16-lead SSOP footprint. | Necessary where software hang detection (watchdog timeout) is required alongside power-supply monitoring. | Choose LTC2901IMS#TRPBF when combined reset + watchdog functionality is mandatory; otherwise LTC2900-1CMS#TRPBF offers simpler, lower-cost supervision. |
Compared with LTC2902IMS#TRPBF and LTC2901IMS#TRPBF, the LTC2900-1CMS#TRPBF delivers minimal-feature, cost-optimized quad supervision in compact MSOP-10 - ideal for applications requiring only accurate voltage monitoring and programmable reset timing without margining or watchdog extensions.
Availability
LTC2900-1CMS#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 compliance across industrial temperature ranges.
Supply support for LTC2900-1CMS#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision instrumentation, power management, and industrial systems.
The LTC2900 product line was designed specifically for multivoltage system supervision - delivering programmable accuracy, low quiescent current, and flexible rail monitoring in minimal footprint packages for computing, communications, and embedded control applications.
FAQ
What is the function of the CRT pin on the LTC2900-1CMS#TRPBF?
The CRT pin on the LTC2900-1CMS#TRPBF sets the reset timeout duration via an external capacitor to ground. With CRT = 1500pF, tRST is 5–9ms typical; scaling follows ~4.6ms/nF. An open CRT pin yields ~50µs minimum delay. This allows precise alignment of reset hold time to processor requirements without firmware involvement.
Does the LTC2900-1CMS#TRPBF support negative voltage monitoring?
Yes, the LTC2900-1CMS#TRPBF supports negative voltage monitoring on V4 using the –ADJ mode. In this configuration, an external resistor divider between the negative supply and VREF (1.210V) sets the trip point, enabling accurate detection of faults on rails such as –5V or –12V - confirmed in datasheet Figure 6 and Table 3.
What is the maximum input voltage allowed on V1–V4 pins of the LTC2900-1CMS#TRPBF?
The absolute maximum rating for V1, V2, V3, and V4 pins of the LTC2900-1CMS#TRPBF is –0.3V to 7V. This range accommodates transient overshoot on positive rails and enables safe interfacing with negative supplies in –ADJ mode, provided the V4 input is configured per datasheet Figure 6 and Table 3.
How does the manual reset (PBR) pin interact with the programmed reset timeout on the LTC2900-1CMS#TRPBF?
When the PBR pin on the LTC2900-1CMS#TRPBF is pulled low (e.g., by a momentary switch), it forces RST low immediately and holds it for the full programmed tRST duration - identical to a power-up reset event. The internal debounce uses the same CRT capacitor, eliminating need for external RC networks.
What is the purpose of the VREF pin on the LTC2900-1CMS#TRPBF, and what load can it drive?
The VREF pin on the LTC2900-1CMS#TRPBF provides a buffered 1.210V reference used for VPG programming and –ADJ mode offset. It is specified to source and sink ±1mA while maintaining accuracy, and can drive up to 1000pF of capacitance without oscillation - sufficient for resistor dividers and small bypass caps.
LTC2900-1CMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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-MSOP
LTC2900-1CMS#TRPBF FAQ
1.How can I place an order for LTC2900-1CMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2900-1CMS#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 LTC2900-1CMS#TRPBF reliable?
The price and inventory of LTC2900-1CMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2900-1CMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2900-1CMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2900-1CMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2900-1CMS#TRPBF?
LTC2900-1CMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2900-1CMS#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 LTC2900-1CMS#TRPBF?
For technical support, including LTC2900-1CMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2900-1CMS#TRPBF requirements.
6.How does Aetrix verify that LTC2900-1CMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2900-1CMS#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 LTC2900-1CMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2900-1CMS#TRPBF?
All LTC2900-1CMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2900-1CMS#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 LTC2900-1CMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC2900-1CMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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