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onsemi NCP300LSN27T1
- Part No.:
- NCP300LSN27T1
- Manufacturer:
- onsemi
- Category:
- Supervisors
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP300LSN27T1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,964
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Product details
Overview
NCP300LSN27T1 from onsemi is a complementary-output ultra-low-current voltage detector IC designed as a microprocessor reset controller. It features a 2.7 V ±2.0% undervoltage detection threshold, 0.135 V hysteresis, 0.5 µA typical quiescent current, and operates from 0.8 V to 10 V supply. It delivers active-low reset output with P-channel source and N-channel sink capability for portable battery-powered systems.
For engineers reviewing the NCP300LSN27T1 datasheet, pinout, applications, or equivalent options, key selection criteria include detection accuracy over −40°C to +125°C, ultra-low supply current at sub-1V input, complementary output drive strength, and TSOP-5 package compatibility with space-constrained PCB layouts.
Technical Context
The NCP300LSN27T1 implements a precision bandgap-based comparator with built-in hysteresis to prevent oscillation near the 2.7 V threshold. Its complementary output stage integrates both P-channel and N-channel MOSFETs, enabling push-pull reset signaling without external pull-up resistors.
It operates across a wide input range (0.8–10 V) while maintaining guaranteed detection performance from −40°C to +125°C for 2.7 V threshold variants. Propagation delay is specified at 55 ns (high-to-low) and 115 ns (low-to-high), supporting fast system response during brownout events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.700 V ±2.0% at 25°C; ±3% over −40°C to +125°C - ensures reliable reset assertion before MCU brownout |
| Hysteresis | 0.135 V typical - prevents chatter during slow-rising/falling supply transitions |
| Quiescent Current | 0.5 µA typical at Vin = 2.6 V - extends battery life in always-on monitoring circuits |
| Supply Range | 0.8 V to 10 V - supports direct connection to Li-ion, NiMH, or regulated rails |
| Output Type | Complementary active-low - drives reset line high/low without external components |
| Propagation Delay | 55 ns (tpHL), 115 ns (tpLH) - enables timely reset assertion/deassertion in high-speed systems |
| Operating Temp | −40°C to +125°C - qualified for automotive under-hood and industrial environments |
Pinout & Package
Package: TSOP-5 (SOT23-5), 1.6 mm × 2.9 mm × 1.1 mm body, lead pitch 0.95 mm, Pb-free, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Reset Output | Complementary active-low output: drives low via N-ch or high via P-ch MOSFET |
| 2 | Input (Vin) | Detection input - connected to monitored supply rail; internal hysteresis applied |
| 3 | No Connect | Internally unused; must be left floating or tied to GND per layout guidelines |
| 4 | GND | Analog and power ground reference for comparator and output stage |
| 5 | No Connect | Internally unused; must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 0.5 µA typical enables >10-year battery life in coin-cell applications |
| High threshold accuracy | ±2.0% at 25°C, ±3% over full temperature range ensures predictable reset timing |
| Complementary output architecture | Eliminates need for external pull-up resistor, reducing BOM count and board area |
| Wide operating voltage range | 0.8–10 V supports direct monitoring of single-cell LiFePO₄, alkaline, or buck-regulated rails |
| Automotive qualification | AEC-Q100 Grade 1 qualified (−40°C to +125°C) for under-hood and infotainment use |
Applications
| Microprocessor Reset Control | Low-Battery Detection |
|---|---|
Use Scenario: Monitors main 3.3 V supply rail in an ARM Cortex-M4-based IoT sensor node. IC Role / Device Role / Timing Role: Voltage detector asserting active-low reset signal to MCU when supply drops below 2.7 V. Use Value: Prevents undefined MCU behavior during brownout; hysteresis avoids repeated resets during marginal supply recovery. | Use Scenario: Detects end-of-life in a CR2032-powered medical thermometer. IC Role / Device Role / Timing Role: Triggers LED alert when battery voltage falls below 2.7 V threshold. Use Value: 0.5 µA quiescent current preserves battery capacity for >5 years in standby mode. |
| Power-Fail Indicator | Battery Backup Switchover |
Use Scenario: Signals AC power loss in a smart home gateway using 5 V wall adapter. IC Role / Device Role / Timing Role: Generates clean reset pulse to enable graceful shutdown sequence upon 5 V rail collapse. Use Value: 55 ns tpHL ensures immediate response to rapid voltage drop; complementary output drives logic-level shutoff circuitry directly. | Use Scenario: Controls switchover from main 3.3 V supply to backup supercapacitor in a data logger. IC Role / Device Role / Timing Role: Asserts reset to disable main regulator and enable backup LDO when main rail falls below 2.7 V. Use Value: Guaranteed operation down to 0.8 V input allows detection even during deep discharge of backup source. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB27DBZR | Open-drain active-low output; 2.7 V threshold; 350 nA max IQ; SOT-23-3 package | Lacks complementary drive - requires external pull-up; smaller footprint but lower sink current (5 mA vs 3.5 mA) | Preferred where board space is critical and external pull-up is acceptable |
| MAX809SEUR+T | Push-pull active-low output; 2.7 V threshold; 12 µA IQ; SOT-23-3 package | Higher quiescent current limits battery lifetime; same pinout incompatible due to different pin 3 function (NC vs GND) | Acceptable for mains-powered systems where ultra-low IQ is not required |
Compared with TLV803EB27DBZR and MAX809SEUR+T, the NCP300LSN27T1 uniquely combines ultra-low 0.5 µA supply current, complementary output, and AEC-Q100 qualification - making it optimal for long-life, automotive-grade, and space-constrained reset control.
Availability
NCP300LSN27T1 is available at Aetrix Electronics and suitable for microprocessor reset control, low-battery detection, and power-fail indicator applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for NCP300LSN27T1 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP300 series belongs to onsemi's precision voltage detector product line, engineered specifically for ultra-low-power reset supervision in battery-critical portable and automotive systems.
FAQ
What is the detection threshold accuracy of the NCP300LSN27T1 over temperature?
The NCP300LSN27T1 has a detection threshold of 2.700 V with ±2.0% accuracy at 25°C and ±3.0% accuracy over the full −40°C to +125°C operating range. This is confirmed in Table 1 of the datasheet, where VDET− min/max values are 2.646 V / 2.754 V at 25°C and 2.619 V / 2.781 V across temperature. The hysteresis of 0.135 V typical further stabilizes switching behavior.
Does the NCP300LSN27T1 require an external pull-up resistor on its reset output?
No, the NCP300LSN27T1 does not require an external pull-up resistor because it features a complementary output stage with integrated P-channel and N-channel MOSFETs. Pin 1 actively drives high or low depending on input voltage relative to the 2.7 V threshold - eliminating the need for external biasing components and reducing system BOM count.
What is the minimum input voltage at which the NCP300LSN27T1 remains functional?
The NCP300LSN27T1 remains functional down to 0.8 V input voltage, as specified in the "Maximum Ratings" table (Vin(min) = 0.8 V). Electrical characteristics are guaranteed from 0.8 V to 10 V, and Figure 4 confirms stable 0.5 µA supply current behavior starting at ~0.7 V - enabling reliable detection even during deep battery discharge.
How does the NCP300LSN27T1 differ from the NCP301LSN27T1?
The NCP300LSN27T1 uses a complementary output (push-pull), while the NCP301LSN27T1 uses an open-drain N-channel output requiring an external pull-up. Both share identical 2.7 V threshold, 0.135 V hysteresis, and 0.5 µA supply current. The NCP300 variant provides higher drive strength (up to 9.7 mA source, 3.5 mA sink) and eliminates external components - making it preferable for noise-sensitive or space-constrained designs.
Is the NCP300LSN27T1 qualified for automotive applications?
Yes, the NCP300LSN27T1 is AEC-Q100 qualified (Grade 1) and PPAP capable, as stated in the "Features" section of the datasheet. It is rated for operation from −40°C to +125°C and carries the "NCV" prefix option (e.g., NCV300LSN27T1) for automotive-specific change control and site requirements - confirming suitability for under-hood and infotainment systems.
NCP300LSN27T1 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:
- 2.7V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP300LSN27T1 FAQ
1.How can I place an order for NCP300LSN27T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP300LSN27T1 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 NCP300LSN27T1 reliable?
The price and inventory of NCP300LSN27T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP300LSN27T1 is usually 5 days.
3.What payment methods are accepted for NCP300LSN27T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP300LSN27T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP300LSN27T1?
NCP300LSN27T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP300LSN27T1 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 NCP300LSN27T1?
For technical support, including NCP300LSN27T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP300LSN27T1 requirements.
6.How does Aetrix verify that NCP300LSN27T1 is sourced from the original manufacturer or authorized distributors?
All NCP300LSN27T1 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 NCP300LSN27T1 meets industry standards.
7.What is the process for return or replacement of NCP300LSN27T1?
All NCP300LSN27T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP300LSN27T1, 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 NCP300LSN27T1 part is unused and in its original packaging.
Return procedure for NCP300LSN27T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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