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onsemi NCP301LSN09T1G
- Part No.:
- NCP301LSN09T1G
- Manufacturer:
- onsemi
- Category:
- Supervisors
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP301LSN09T1G.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,951
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Product details
Overview
NCP301LSN09T1G from onsemi is an ultra-low-quiescent-current (0.45 µA typical) open-drain voltage detector IC designed for microprocessor reset control in battery-powered systems. It features a precise 0.9 V undervoltage detection threshold with ±2.0% accuracy, 45 mV hysteresis, and operates across 0.8 V to 10 V input range - enabling reliable low-battery detection in portable medical devices and IoT edge sensors.
For engineers reviewing the NCP301LSN09T1G datasheet, pinout, applications, or equivalent options, this device serves as a critical power-monitoring component where extended battery life, thermal stability over −40°C to +125°C, and minimal supply current are non-negotiable design requirements.
Technical Context
The NCP301LSN09T1G implements a precision bandgap-based comparator with built-in hysteresis to prevent oscillation near the 0.9 V threshold during slow-rising/falling supply conditions. Its open-drain N-channel output requires an external pull-up resistor and supports active-low reset signaling compatible with standard logic families.
It operates without internal reference trimming - relying on factory-laser-trimmed thresholds - and delivers propagation delays under 300 ns (tpHL = 97 ns typical) while maintaining sub-1 µA quiescent current across its full operating temperature range for voltage options ≥1.2 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detector Threshold | 0.900 V ±2.0% at 25°C; enables accurate brown-out detection for 1.0–1.2 V logic rails |
| Supply Current | 0.45 µA typical at Vin = 2.9 V; extends battery life in always-on monitoring applications |
| Hysteresis | 45 mV typical; prevents chatter during gradual supply recovery or noise-induced threshold crossings |
| Operating Voltage Range | 0.8 V to 10 V; supports direct connection to Li-ion, coin-cell, or multi-rail system supplies |
| Temperature Range | −40°C to +125°C (for 0.9 V option); validated for automotive cabin and industrial sensor environments |
| Output Type | Open-drain N-channel; allows flexible pull-up voltage selection and wired-OR reset bus configuration |
| Propagation Delay | 97 ns typical (high-to-low); ensures fast system response to supply collapse without excessive timing margin |
Pinout & Package
Package: TSOP-5 (SOT-23-5), 1.6 mm × 2.9 mm × 1.1 mm body, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Reset Output (open-drain) | Sinks current when Vin falls below 0.9 V; requires external pull-up for logic-level assertion |
| 2 | Input (VIN) | Monitors supply rail directly; no external resistor divider needed for 0.9 V detection |
| 3 | Ground | Reference return path for internal comparator and output stage |
| 4 | No Connect | Internally unconnected; must be left floating or tied to GND per layout best practice |
| 5 | No Connect | Internally unconnected; must be left floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 0.45 µA typical enables >10-year shelf life in coin-cell-powered remote sensors |
| Precision threshold accuracy | ±2.0% tolerance eliminates need for external calibration in cost-sensitive consumer designs |
| Wide input voltage range | 0.8 V to 10 V operation supports direct monitoring of single-cell LiFePO₄, alkaline, or buck-regulated rails |
| High-temperature operation | Specified up to +125°C ambient enables use in engine-control or industrial motor-drive subsystems |
| Open-drain output architecture | Enables shared reset bus across multiple ICs and compatibility with 1.8 V, 3.3 V, or 5 V logic domains |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell with 2.0–3.0 V nominal voltage. IC Role / Device Role / Timing Role: Monitors battery voltage and asserts reset when falling below 0.9 V to prevent corrupted EEPROM writes during brownout. Use Value: 0.45 µA supply current extends usable battery life by >30% versus legacy reset ICs; ±2.0% threshold ensures consistent shutdown before data loss. |
Use Scenario: DIN-rail mounted analog input module operating in factory-floor cabinets with ambient temperatures up to +75°C. IC Role / Device Role / Timing Role: Detects 24 V DC supply sag below 22 V (via resistive divider) and triggers controller reset before ADC saturation. Use Value: 125°C-rated operation guarantees reliability in uncooled enclosures; open-drain output interfaces cleanly with PLC's 24 V logic reset bus. |
| Automotive Body Control Units | Smart Home Battery Backup Systems |
|
Use Scenario: Door module powered from vehicle battery (9–16 V) with cold-cranking immunity down to 6 V. IC Role / Device Role / Timing Role: Resets microcontroller if supply drops below 0.9 V during cranking transients, using dedicated low-VIN rail. Use Value: Validated to AEC-Q100 Grade 1 (−40°C to +125°C); hysteresis prevents false resets during noisy 12 V rail recovery. |
Use Scenario: Wi-Fi thermostat with primary AA batteries and supercapacitor backup during AC outage. IC Role / Device Role / Timing Role: Detects main battery depletion and initiates graceful shutdown before supercap voltage falls below MCU minimum. Use Value: 0.8 V minimum operating voltage allows detection even as battery discharges to endpoint; 45 mV hysteresis avoids oscillation during capacitor discharge tail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809KDBZR | Fixed 3.08 V threshold; 350 nA quiescent current; SOT-23-3 package (3-pin) | Designed for higher-voltage rails only; lacks 0.9 V option and wide 0.8–10 V input range | Select when monitoring 3.3 V systems with ultra-low-power priority and simplified 3-pin layout |
| MAX809SEUR+T | Fixed 2.93 V threshold; 12 µA quiescent current; SOT-23-3 package | Higher supply current limits battery life in multi-year deployments; no 0.9 V variant available | Choose for legacy 3 V systems requiring proven qualification history but not sub-µA operation |
Compared with TLV809KDBZR and MAX809SEUR+T, the NCP301LSN09T1G uniquely supports 0.9 V detection with sub-µA current draw and 10 V absolute maximum rating - making it the only viable choice for direct low-voltage battery monitoring without resistive dividers.
Availability
NCP301LSN09T1G is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and automotive body control units requiring stable component supply across long production lifecycles.
Supply support for NCP301LSN09T1G 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
onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, and IoT applications.
The NCP300/NCP301 series was engineered specifically for ultra-low-power reset supervision in battery-constrained systems - prioritizing nanowatt operation, high-accuracy thresholds, and robust thermal performance over feature-rich programmability.
FAQ
What is the exact undervoltage detection threshold of the NCP301LSN09T1G?
The NCP301LSN09T1G has a factory-trimmed detection threshold of 0.900 V ±2.0% at 25°C. Over the full −40°C to +125°C operating range, the threshold remains within ±3% of nominal for this voltage option, ensuring predictable reset behavior across environmental extremes.
Does the NCP301LSN09T1G require an external pull-up resistor on its reset output?
Yes, the NCP301LSN09T1G features an open-drain N-channel output (Pin 1) and requires an external pull-up resistor to a logic-compatible voltage rail. Typical values range from 10 kΩ to 100 kΩ depending on rise-time and bus capacitance requirements.
Can the NCP301LSN09T1G operate directly from a single-cell lithium battery?
Yes - the NCP301LSN09T1G operates from 0.8 V to 10 V and draws only 0.45 µA typical, making it ideal for direct connection to single-cell LiFePO₄ (2.5–3.65 V) or alkaline (0.9–1.6 V) batteries without intermediate regulation.
Is the NCP301LSN09T1G qualified for automotive applications?
The NCP301LSN09T1G is not automotive-qualified; however, its NCV301LSN09T1G counterpart carries AEC-Q100 Grade 1 qualification. The NCP prefix denotes commercial/industrial grade with identical electrical specs but different process and test screening.
What is the maximum input voltage rating for the NCP301LSN09T1G?
The NCP301LSN09T1G has an absolute maximum input voltage rating of 12 V on Pin 2 (VIN). Its recommended operating range is 0.8 V to 10 V, providing 2 V of headroom for transient suppression in real-world power systems.
NCP301LSN09T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 0.9V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP301LSN09T1G FAQ
1.How can I place an order for NCP301LSN09T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP301LSN09T1G 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 NCP301LSN09T1G reliable?
The price and inventory of NCP301LSN09T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP301LSN09T1G is usually 5 days.
3.What payment methods are accepted for NCP301LSN09T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP301LSN09T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP301LSN09T1G?
NCP301LSN09T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP301LSN09T1G 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 NCP301LSN09T1G?
For technical support, including NCP301LSN09T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP301LSN09T1G requirements.
6.How does Aetrix verify that NCP301LSN09T1G is sourced from the original manufacturer or authorized distributors?
All NCP301LSN09T1G 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 NCP301LSN09T1G meets industry standards.
7.What is the process for return or replacement of NCP301LSN09T1G?
All NCP301LSN09T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP301LSN09T1G, 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 NCP301LSN09T1G part is unused and in its original packaging.
Return procedure for NCP301LSN09T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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