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Analog Devices Inc. LTC2919CMS-5#TRPBF
- Part No.:
- LTC2919CMS-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2919CMS-5#TRPBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 10MSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC2919CMS-5#TRPBF from Analog Devices is a precision triple-input voltage supervisor IC for system power monitoring, featuring two adjustable 0.5V-threshold inputs (±1.5% accuracy over –40°C to 85°C), a fixed –10% VCC UVLO monitor for 5V supplies (4.35V threshold), open-drain RST/OUT1/OUT2 outputs, and pin-selectable polarity for UV/OV detection of positive or negative rails. It enables robust fault detection in multi-rail embedded systems.
For engineers reviewing the LTC2919CMS-5#TRPBF datasheet, LTC2919CMS-5#TRPBF pinout, LTC2919CMS-5#TRPBF application, or LTC2919CMS-5#TRPBF equivalent, key selection criteria include its ±1.5% threshold accuracy, 200ms internal reset timeout, 50µA quiescent current, 10-lead MSOP package, and support for dual-polarity monitoring without external components.
Technical Context
The LTC2919CMS-5#TRPBF integrates three independent monitoring channels: two comparator-based adjustable inputs (ADJ1/ADJ2) with user-configurable polarity via the three-state SEL pin, and a dedicated VCC UVLO input calibrated for 5V supply monitoring (4.35V nominal threshold). All thresholds are guaranteed ±1.5% over temperature.
Its output architecture uses open-drain logic with guaranteed low-state operation down to VCC = 0.5V, and a configurable reset timeout implemented either by internal 200ms timer (TMR = GND), external capacitor (9ms/nF), or disabled (TMR = VCC). Glitch filtering on ADJ inputs prevents false triggering from transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 4.35V (–10% of 5V); enables accurate third-rail monitoring without external resistors |
| ADJ Input Threshold | 495–505mV (±1.5% over –40°C to 85°C); supports precise UV/OV detection of any rail via resistor divider |
| Quiescent Current | 50µA typical at 5V; enables always-on monitoring in battery-sensitive applications |
| Reset Timeout Options | Internal 200ms (TMR = GND), external capacitor (9ms/nF), or disabled (TMR = VCC); eliminates need for external timing ICs |
| Output Type | Open-drain RST/OUT1/OUT2; allows level-shifting, wired-OR, and pull-up to higher voltage than VCC |
| Input Polarity Control | Three-state SEL pin (VCC/GND/open); selects +UV/–OV, +UV/+UV, or –UV/–OV modes without external switches |
| Reference Output | 1.000V buffered REF (±10mV over temp); provides stable offset for negative-rail monitoring circuits |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm), RoHS-compliant, rated for –40°C to 85°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SEL (Pin 1) | Three-state polarity select input | Determines ADJ1/ADJ2 polarity combinations (+/+ , +/– , –/–); no external components required |
| VCC (Pin 2) | Power supply input / shunt-regulated node | Accepts 0.5–6V directly; includes 6.5V shunt regulator for high-voltage operation with series resistor |
| OUT1 (Pin 3) | Open-drain status output for ADJ1 | Asserts low when ADJ1 is invalid (UV for +polarity, OV for –polarity); requires external pull-up |
| OUT2 (Pin 4) | Open-drain status output for ADJ2 | Asserts low when ADJ2 is invalid; independent of OUT1 and RST |
| RST (Pin 5) | Open-drain inverted reset output | Asserts low if any monitored input fails or during power-up/brownout; held low for timeout after recovery |
| GND (Pin 6) | Device ground reference | Common return for all analog and digital circuitry; must be low-impedance connection |
| REF (Pin 7) | Buffered 1V reference output | Sources/sinks up to 1mA; used as offset for negative-rail monitoring (e.g., –5V UV detection) |
| TMR (Pin 8) | Reset timeout control terminal | Configures timeout mode: GND = 200ms internal, cap-to-GND = 9ms/nF, VCC = comparator mode (no timeout) |
| ADJ2 (Pin 9) | Adjustable voltage input 2 | 0.5V threshold comparator input; polarity set by SEL; tie to GND if unused (SEL = GND or open) |
| ADJ1 (Pin 10) | Adjustable voltage input 1 | 0.5V threshold comparator input; polarity set by SEL; tie to REF if unused (SEL = VCC or open) |
Key Features
| Feature | Design Value |
|---|---|
| Precision threshold accuracy | ±1.5% over full –40°C to 85°C range ensures reliable trip points across automotive and industrial environments |
| Triple independent monitoring channels | Two adjustable inputs + one fixed 5V UVLO enables complete system rail supervision with single IC |
| Pin-selectable polarity | SEL pin configures ADJ1/ADJ2 for +UV/–OV, +UV/+UV, or –UV/–OV detection-no external logic or resistors needed |
| Low-power operation | 50µA quiescent current supports always-on monitoring in energy-constrained systems like IoT edge nodes |
| Glitch-immune design | Propagation delay filtering and configurable reset timeout prevent false resets from load transients or noise |
| Robust output drive | Outputs guaranteed low down to VCC = 0.5V; supports safe power sequencing in brownout conditions |
Applications
| Desktop Power Sequencing | Automotive Infotainment Supply Monitoring |
|---|---|
|
Use Scenario: Monitoring 5V main rail and 3.3V I/O rail in desktop motherboard VRM stages during cold boot and thermal stress. IC Role / Device Role / Timing Role: LTC2919CMS-5#TRPBF acts as primary supervisor, asserting RST until both rails stabilize above thresholds and hold for 200ms timeout. Use Value: Prevents CPU lockup by ensuring clean power-up sequence; ±1.5% accuracy avoids nuisance resets within 5V ±5% spec. |
Use Scenario: Supervising 5V microcontroller supply and –12V audio amplifier rail in automotive head unit under load dump and cold-crank conditions. IC Role / Device Role / Timing Role: LTC2919CMS-5#TRPBF monitors +5V (ADJ1, +polarity) and –12V (ADJ2, –polarity) using REF as offset, generating coordinated RST signal. Use Value: Enables fail-safe shutdown before MCU corruption; 50µA current extends battery runtime during key-off monitoring. |
| Industrial PLC I/O Module | Network Server Core Voltage Monitor |
|
Use Scenario: Detecting undervoltage on isolated 24V DC input and 5V logic rail in programmable logic controller I/O modules exposed to EMI-rich factory floors. IC Role / Device Role / Timing Role: LTC2919CMS-5#TRPBF uses SEL = open for dual +UV mode, with glitch filtering suppressing noise-induced false triggers on ADJ inputs. Use Value: Eliminates need for external RC filters; ±1.5% threshold stability ensures consistent behavior across –40°C to 85°C operating range. |
Use Scenario: Monitoring 5V standby and 12V main supply in redundant server power distribution units where reliability is critical. IC Role / Device Role / Timing Role: LTC2919CMS-5#TRPBF configures ADJ1 for 5V SB (UV only) and ADJ2 for 12V main (UV/OV window) using resistor dividers and SEL = VCC. Use Value: Single-chip solution replaces discrete comparators and timers; open-drain outputs enable OR-ing of multiple supervisors for fault redundancy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.3V UVLO only; no adjustable inputs or polarity selection; 1.8µA IQ; SOT-23-6 | Single-rail monitoring only; lacks dual adjustable inputs and negative rail support | Select when only basic 3.3V supply monitoring is required and ultra-low IQ is critical |
| MAX6816EUT+T | Single 5V UVLO with manual reset; no adjustable inputs; 10µA IQ; SOT-23-6 | No dual monitoring, no polarity control, no REF output; requires external reset button | Select for cost-sensitive, single-rail applications where manual reset is acceptable |
Compared with TPS3808G33DBVR and MAX6816EUT+T, the LTC2919CMS-5#TRPBF provides unique triple-channel supervision with field-configurable polarity and 1V REF-enabling compact, flexible monitoring of mixed positive/negative rails without external components.
Availability
LTC2919CMS-5#TRPBF is available at Aetrix Electronics and suitable for desktop computing, automotive infotainment, and industrial PLC applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for LTC2919CMS-5#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 LTC2919CMS-5#TRPBF belongs to Analog Devices' precision voltage supervisor product line, designed specifically for space-constrained, multi-rail systems requiring accurate, configurable, and low-power supply monitoring.
FAQ
What is the VCC UVLO threshold for LTC2919CMS-5#TRPBF?
The LTC2919CMS-5#TRPBF has a fixed VCC UVLO threshold of 4.35V (–10% of 5V), with ±0.3% hysteresis. This enables direct monitoring of a 5V supply without external resistors. The threshold is guaranteed over the full –40°C to 85°C operating range and is independent of the adjustable ADJ1/ADJ2 inputs.
How does the SEL pin configure polarity for ADJ1 and ADJ2 on LTC2919CMS-5#TRPBF?
On the LTC2919CMS-5#TRPBF, the SEL pin selects polarity combinations: tied to VCC enables +UV/+UV mode; left open enables +UV/–OV mode; tied to GND enables –UV/–UV mode. Each configuration determines whether an ADJ input triggers on undervoltage (positive polarity) or overvoltage (negative polarity), enabling flexible fault detection across mixed-rail systems.
Can LTC2919CMS-5#TRPBF monitor negative voltages, and how is that implemented?
Yes, the LTC2919CMS-5#TRPBF monitors negative voltages using its buffered 1V REF output as an offset. When SEL configures an ADJ input for negative polarity, the input detects –UV (e.g., –4.3V for –5V rail) by comparing the scaled negative rail to REF. External resistor dividers translate the negative voltage to the 0.5V comparator threshold, with REF providing the reference point.
What are the reset timeout options for LTC2919CMS-5#TRPBF, and how are they selected?
The LTC2919CMS-5#TRPBF offers three reset timeout modes: internal 200ms (TMR = GND), external capacitor (9ms/nF, e.g., 22nF → 200ms), or disabled (TMR = VCC, entering comparator mode). Timeout selection is hardware-configured via TMR pin voltage or capacitance-no software or registers required-and directly affects RST assertion duration after fault recovery.
Is LTC2919CMS-5#TRPBF suitable for automotive applications, and what qualification does it hold?
The LTC2919CMS-5#TRPBF is rated for –40°C to 85°C operation and is listed in Analog Devices' automotive-grade product portfolio. While not individually AEC-Q100 certified, it shares the same die and process as AEC-Q100-qualified variants (e.g., LTC2919IDDB-5#WTRPBF) and is widely deployed in automotive infotainment and body control modules where extended temperature range and reliability are required.
LTC2919CMS-5#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:
- 3
- Voltage - Threshold:
- 4.425V, Adj, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC2919CMS-5#TRPBF FAQ
1.How can I place an order for LTC2919CMS-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2919CMS-5#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 LTC2919CMS-5#TRPBF reliable?
The price and inventory of LTC2919CMS-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2919CMS-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2919CMS-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2919CMS-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2919CMS-5#TRPBF?
LTC2919CMS-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2919CMS-5#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 LTC2919CMS-5#TRPBF?
For technical support, including LTC2919CMS-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2919CMS-5#TRPBF requirements.
6.How does Aetrix verify that LTC2919CMS-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2919CMS-5#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 LTC2919CMS-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2919CMS-5#TRPBF?
All LTC2919CMS-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2919CMS-5#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 LTC2919CMS-5#TRPBF part is unused and in its original packaging.
Return procedure for LTC2919CMS-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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