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Analog Devices Inc. LTC2919HMS-5#PBF
- Part No.:
- LTC2919HMS-5#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2919HMS-5#PBF.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:194
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Product details
Overview
LTC2919HMS-5#PBF from Analog Devices is a precision triple/dual-input supply monitor IC designed for automotive and industrial power-rail supervision. It features two adjustable 0.5V-threshold inputs (±1.5% accuracy over –40°C to +125°C), a third fixed VCC UVLO input for 5V supplies (2.5V nominal threshold), open-drain RST/OUT1/OUT2 outputs, and pin-selectable polarity for monitoring positive/negative UV/OV conditions in core voltage, I/O, and automotive subsystems.
For engineers reviewing the LTC2919HMS-5#PBF datasheet, LTC2919HMS-5#PBF pinout, LTC2919HMS-5#PBF application, or LTC2919HMS-5#PBF equivalent, key selection criteria include guaranteed ±1.5% threshold accuracy across temperature, 50µA quiescent current, 200ms internal reset timeout, 6.5V shunt regulator support, and AEC-Q100 qualification for under-hood automotive use.
Technical Context
The LTC2919HMS-5#PBF implements dual independent comparators with user-configurable polarity via the three-state SEL pin, enabling simultaneous monitoring of positive and negative rails for undervoltage or overvoltage faults. Its buffered 1V reference supports offset-based negative-supply sensing without external components.
Reset assertion logic requires all monitored inputs (ADJ1, ADJ2, and VCC) to remain valid for the full timeout period-either 200ms (TMR = GND), externally set via CTMR (9ms/nF), or disabled (TMR = VCC). Glitch filtering on comparator propagation (50–800µs delay vs. overdrive) prevents false triggering from transient noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 4.350V to 4.500V (–10% of 5V supply, ±1.5% accuracy over –40°C to +125°C) |
| ADJ Input Threshold | 492.5mV to 507.5mV (0.5V nominal, ±1.5% accuracy over full temp range) |
| Quiescent Current | 50µA typical, 280µA max at –40°C to +125°C (enables micropower system supervision) |
| Reset Timeout | 200ms internal (TMR = GND); configurable externally (9ms/nF) or disabled (TMR = VCC) |
| Output Type | Open-drain RST, OUT1, OUT2 with guaranteed low output down to VCC = 0.5V (supports brownout-safe reset) |
| Reference Output | 0.985V to 1.015V buffered 1V reference (±1mA load capability, no bypass required) |
| Shunt Regulator | 6.0V to 7.1V VCC shunt regulation (enables direct operation from >6V supplies with series resistor) |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm), exposed pad optional, rated for –40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SEL (1) | Three-state polarity select | Configures ADJ1/ADJ2 as (+)UV/(–)OV, (+)UV/(+)UV, or (–)UV/(–)UV via VCC/GND/open connection |
| VCC (2) | Power supply input | Operates as direct supply (≤6V) or shunt-regulated input (>6V); enables VCC UVLO monitoring |
| OUT1 (3) | Adjustable input 1 status | Open-drain output asserting low on ADJ1 fault; compatible with pull-up to any voltage ≤7.5V |
| OUT2 (4) | Adjustable input 2 status | Open-drain output asserting low on ADJ2 fault; independent of OUT1 and RST timing |
| RST (5) | System reset output | Open-drain inverted reset; held low until all inputs valid for full timeout period |
| GND (6) | Device ground | Reference node for all analog and digital circuitry; exposed pad may be tied to GND for thermal improvement |
| REF (7) | Buffered 1V reference | Stable 1V output for negative-rail offset sensing; drives up to 1mA, supports 1000pF capacitive load |
| TMR (8) | Reset timeout control | Selects internal 200ms (GND), external capacitor (CTMR), or comparator mode (VCC) |
| ADJ2 (9) | Adjustable input 2 | 0.5V threshold comparator input; polarity set by SEL; tie to GND if unused (SEL = GND/Open) |
| ADJ1 (10) | Adjustable input 1 | 0.5V threshold comparator input; polarity set by SEL; tie to REF if unused (SEL = VCC/Open) |
Key Features
| Feature | Design Value |
|---|---|
| Polarity-selectable inputs | Single SEL pin configures both ADJ1 and ADJ2 for positive/negative UV or OV detection without external components |
| Triple independent monitoring | Two adjustable 0.5V inputs + third fixed VCC UVLO (for 5V rail) provide complete 3-rail supervision in one 10-pin package |
| Automotive-grade reliability | AEC-Q100 qualified (H-grade), specified from –40°C to +125°C with 150°C max junction temperature |
| Glitch-immune timing | Programmable reset timeout (200ms internal or external CTMR) plus comparator propagation delay filtering suppresses noise-induced false resets |
| Micropower operation | 50µA typical ICC enables always-on supervision in battery-backed or low-power systems without compromising accuracy |
Applications
| Core Voltage Monitoring | I/O Supply Monitoring |
|---|---|
Use Scenario: Supervising 5V core logic supply in automotive ADAS ECU during cold cranking and load dump events. IC Role / Device Role / Timing Role: LTC2919HMS-5#PBF monitors VCC UVLO at 4.35V–4.50V and asserts RST within 50–800µs to hold processor in reset until stable. Use Value: Prevents erratic microcontroller behavior during battery voltage sag below 4.35V, leveraging ±1.5% threshold accuracy and guaranteed low output at VCC = 0.5V. | Use Scenario: Monitoring dual 3.3V and 1.8V I/O rails in network server backplane with shared reset signaling. IC Role / Device Role / Timing Role: LTC2919HMS-5#PBF uses ADJ1 and ADJ2 with resistor dividers to detect UV on both rails; RST asserts only when both are valid for 200ms. Use Value: Eliminates need for two discrete supervisors, reducing BOM count while ensuring coordinated reset release after simultaneous rail recovery. |
| Automotive Negative Rail Monitoring | Industrial Dual-Polarity Power Sequencing |
Use Scenario: Detecting –12V undervoltage in vehicle infotainment amplifier supply during engine start. IC Role / Device Role / Timing Role: LTC2919HMS-5#PBF configured with SEL = GND monitors ADJ1 as negative polarity input; REF provides 1V offset to sense –12V UV at –11.4V. Use Value: Enables accurate negative-rail supervision without external op-amps or level shifters, using only two resistors and the integrated buffered reference. | Use Scenario: Coordinating startup of +15V and –15V analog front-end supplies in test equipment with strict sequencing requirements. IC Role / Device Role / Timing Role: LTC2919HMS-5#PBF uses ADJ1 (positive polarity) for +15V OV and ADJ2 (negative polarity) for –15V UV, generating independent OUT1/OUT2 flags. Use Value: Provides per-rail fault visibility and combined RST assertion only when both rails meet thresholds, supporting safe power-up sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E33DBZR | Single 3.3V fixed UV detector; no adjustable inputs, no polarity selection, no VCC monitoring | Only suitable for basic single-rail 3.3V UV detection; lacks dual-adjustable capability and automotive temp range | Select only for cost-sensitive, single-threshold applications where LTC2919HMS-5#PBF's triple-monitoring and configurability are unnecessary |
| MAX6816EUT+T | Single-channel 0.5V adjustable supervisor; no VCC UVLO, no REF output, no AEC-Q100 qualification | Supports only one adjustable rail; not rated for automotive under-hood temperatures (max +85°C) | Consider only for non-automotive industrial designs requiring minimal feature set and lower price point than LTC2919HMS-5#PBF |
Compared with TLV809E33DBZR and MAX6816EUT+T, the LTC2919HMS-5#PBF delivers triple-rail supervision, ±1.5% threshold accuracy across –40°C to +125°C, integrated 1V reference for negative-rail sensing, and AEC-Q100 compliance-making it uniquely suited for demanding automotive and high-reliability industrial power monitoring where flexibility and precision are critical.
Availability
LTC2919HMS-5#PBF is available at Aetrix Electronics and suitable for automotive ADAS modules, industrial PLC power management, and telecom infrastructure requiring stable component supply with long lifecycle assurance and AEC-Q100 compliance.
Supply support for LTC2919HMS-5#PBF 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 LTC2919 product line delivers precision, low-power, multi-rail voltage supervision ICs optimized for automotive and industrial systems requiring guaranteed accuracy, wide temperature operation, and flexible polarity configuration.
FAQ
What is the operating temperature range for the LTC2919HMS-5#PBF?
The LTC2919HMS-5#PBF is rated for –40°C to +125°C operation and is AEC-Q100 qualified for automotive under-hood applications. This H-grade specification ensures guaranteed performance across the full range, including ±1.5% threshold accuracy and 50µA typical quiescent current, making it suitable for harsh environments where standard commercial or industrial grade parts would fail.
How does the SEL pin configure polarity for ADJ1 and ADJ2 on the LTC2919HMS-5#PBF?
The SEL pin on the LTC2919HMS-5#PBF selects polarity combinations for both ADJ inputs: tied to VCC enables (+)UV/(+)UV monitoring; left open enables (+)UV/(–)OV; tied to GND enables (–)UV/(–)UV. Each configuration determines whether the comparator triggers on voltage falling below (positive polarity) or rising above (negative polarity) the 0.5V threshold-enabling flexible UV/OV detection on positive or negative rails without external components.
Can the LTC2919HMS-5#PBF monitor a 5V supply directly without external resistors?
Yes-the LTC2919HMS-5#PBF includes a dedicated VCC UVLO input that monitors the 5V supply directly with a fixed –10% threshold (4.35V–4.50V). No external resistors are needed for this function. The ADJ1 and ADJ2 inputs remain available for monitoring additional rails (e.g., 3.3V, 1.8V, or negative supplies), and the REF output supports offset-based negative-rail sensing-all within the same 10-pin MSOP package.
What reset timeout options does the LTC2919HMS-5#PBF support, and how are they selected?
The LTC2919HMS-5#PBF supports three reset timeout modes selected via the TMR pin: tying TMR to GND enables the internal 200ms timeout; connecting an external capacitor CTMR to GND sets timeout at 9ms/nF (e.g., 22nF = 200ms); tying TMR to VCC disables the timer for immediate comparator-mode response. All modes retain glitch filtering on comparator outputs, ensuring robustness against transient noise regardless of timeout selection.
Is the LTC2919HMS-5#PBF compatible with high-voltage supplies exceeding 6V?
Yes-the LTC2919HMS-5#PBF integrates a 6.5V shunt regulator on the VCC pin, allowing direct connection to supplies up to ~60V when used with an appropriate series current-limiting resistor. The resistor value must ensure VCC input current stays within ±10mA, calculated using VS(MIN)/VS(MAX) and expected REF load. This eliminates the need for external regulators in high-voltage automotive or industrial applications while maintaining full functionality of all monitoring features.
LTC2919HMS-5#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC2919HMS-5#PBF FAQ
1.How can I place an order for LTC2919HMS-5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2919HMS-5#PBF 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 LTC2919HMS-5#PBF reliable?
The price and inventory of LTC2919HMS-5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2919HMS-5#PBF is usually 5 days.
3.What payment methods are accepted for LTC2919HMS-5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2919HMS-5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2919HMS-5#PBF?
LTC2919HMS-5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2919HMS-5#PBF 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 LTC2919HMS-5#PBF?
For technical support, including LTC2919HMS-5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2919HMS-5#PBF requirements.
6.How does Aetrix verify that LTC2919HMS-5#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2919HMS-5#PBF 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 LTC2919HMS-5#PBF meets industry standards.
7.What is the process for return or replacement of LTC2919HMS-5#PBF?
All LTC2919HMS-5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2919HMS-5#PBF, 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 LTC2919HMS-5#PBF part is unused and in its original packaging.
Return procedure for LTC2919HMS-5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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