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onsemi NCP302LSN17T1
- Part No.:
- NCP302LSN17T1
- Manufacturer:
- onsemi
- Category:
- Supervisors
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP302LSN17T1.pdf
- Description:
- IC SUPERVISOR PWR SUP SUPPORT
- Quantity:
- Payment:
- Shipping:
Inventory:14,430
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Product details
Overview
NCP302LSN17T1 from onsemi is an ultra-low-quiescent-current voltage detector IC with programmable delay, designed as a reset controller for microprocessor-based portable systems. It features a 1.7 V ±2.0% undervoltage detection threshold, 0.051–0.119 V hysteresis, and externally programmable time delay via capacitor on pin 5. Its complementary output (active-low reset) supports reliable power-on reset in battery-powered IoT sensors and wearables.
For engineers reviewing the NCP302LSN17T1 datasheet, pinout, applications, or equivalent options, this device is selected for low-power system supervision where extended battery life, precise threshold accuracy, and configurable reset timing are critical - especially in space-constrained SOT-23-5 designs requiring <0.5 µA quiescent current.
Technical Context
The NCP302LSN17T1 integrates a precision bandgap-based voltage comparator with built-in hysteresis and a dedicated CD-pin-controlled RC delay generator. Its internal P-channel/N-channel complementary output stage delivers both sink and source capability without external pull-ups.
It operates across 0.8 V to 10 V supply range and is specified from −40°C to +125°C (excluding 0.9–1.1 V variants). The delay timing is determined by the external capacitor on pin 5 and the internal 0.5–2.0 MΩ pull-up resistance, enabling predictable tD1/tD2 delays independent of supply voltage drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detector Threshold | 1.666–1.734 V (1.7 V nominal ±2.0%) - sets precise reset activation point for 1.7 V rail supervision |
| Hysteresis | 0.051–0.119 V - prevents chatter during slow-rising/falling supply transitions |
| Quiescent Current | 0.23–0.48 µA at Vin = 1.7 V - enables multi-year battery operation in always-on monitoring nodes |
| Operating Voltage Range | 0.8 V to 10 V - supports direct connection to Li-ion, coin cell, or intermediate LDO outputs |
| Output Type | Complementary (Pch source + Nch sink) - drives reset lines directly without external components |
| Delay Timing Control | Externally programmable via capacitor on pin 5 - allows flexible reset hold time tuning (ms to seconds) |
| Temperature Range | −40°C to +125°C - qualified for automotive body electronics and industrial edge controllers |
Pinout & Package
Package: Thin SOT-23-5 (TSOP-5/SC59-5), case 483 - 2.9 mm × 1.6 mm footprint, 0.95 mm height, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Reset Output | Complementary active-low reset signal; sinks up to 3.5 mA or sources up to 9.7 mA |
| 2 | Input (VIN) | Monitored supply rail input; detects undervoltage condition relative to 1.7 V threshold |
| 3 | GND | Analog/digital ground reference; must be low-impedance for stable threshold accuracy |
| 4 | N.C. | No internal connection - left unconnected per datasheet; not usable as spare pin |
| 5 | CD (Delay Capacitor) | Connects to external timing capacitor; internal 1.0 MΩ (typ) pull-up sets RC delay time constant |
Key Features
| Feature | Design Value |
|---|---|
| 0.5 µA typical quiescent current | Extends shelf life and runtime in battery-backed SRAM, real-time clocks, and BLE peripherals |
| 2.0% threshold accuracy | Eliminates need for external trimming or calibration in production test for 1.7 V rail monitoring |
| Programmable delay via CD pin | Enables one-part-number flexibility across multiple reset timeout requirements (e.g., 10 ms vs. 500 ms) |
| −40°C to +125°C operation | Supports under-hood automotive modules and industrial gateways without derating |
| Pb-free SOT-23-5 package | Meets RoHS/REACH compliance for global commercial and automotive shipments |
Applications
| Microprocessor Reset Controller | Low-Battery Detection |
|---|---|
Use Scenario: Supervises 1.7 V core supply of an ARM Cortex-M0+ MCU in a wireless sensor node. IC Role / Device Role / Timing Role: Generates clean, glitch-free active-low reset pulse after power stabilization, with 100 ms delay set by 100 nF CD capacitor. Use Value: Prevents premature firmware execution before regulator settling; eliminates need for discrete RC network. |
Use Scenario: Monitors declining voltage of a CR2032 coin cell powering a medical patch monitor. IC Role / Device Role / Timing Role: Triggers low-battery warning interrupt when cell drops below 1.7 V, with hysteresis preventing false alerts during pulse loads. Use Value: Achieves >5-year battery life using sub-µA quiescent current; no additional supervisor IC required. |
| Power-Fail Indicator | Battery Backup Detection |
Use Scenario: Detects AC/DC adapter dropout in a smart home hub with backup supercapacitor. IC Role / Device Role / Timing Role: Asserts reset within 1 µs of crossing 1.7 V threshold, initiating controlled shutdown sequence. Use Value: Guarantees deterministic state save before brownout; meets IEC 61000-4-11 immunity requirements. |
Use Scenario: Switches RTC and SRAM to backup lithium coin cell when main 3.3 V rail fails. IC Role / Device Role / Timing Role: Drives MOSFET gate via complementary output to enable seamless switchover with no voltage gap. Use Value: Eliminates external level-shifter or logic gate; reduces BOM count and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB17DBVR | Fixed 1.7 V threshold, open-drain output, 350 nA IQ, no programmable delay | Suitable only for simple reset without timing control; requires external pull-up | Select when minimal quiescent current is prioritized over delay configurability |
| NCP303LSN17T1 | Same 1.7 V threshold, open-drain N-ch output, identical pinout, but lacks P-ch source capability | Requires external pull-up resistor; lower drive strength limits noise immunity in noisy environments | Select when cost reduction is critical and complementary drive is unnecessary |
Compared with TLV803EB17DBVR and NCP303LSN17T1, the NCP302LSN17T1 uniquely provides complementary output drive and programmable delay in the same SOT-23-5 package - enabling robust, self-contained reset supervision without added passives or timing components.
Availability
NCP302LSN17T1 is available at Aetrix Electronics and suitable for battery-powered IoT sensors, automotive body controllers, and industrial edge devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP302LSN17T1 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
The NCP302 series belongs to onsemi's precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy reset control in portable and harsh-environment systems.
FAQ
What is the exact undervoltage detection threshold of the NCP302LSN17T1?
The NCP302LSN17T1 has a guaranteed detection threshold of 1.666 V (min) to 1.734 V (max) at 25°C, with 2.0% accuracy over temperature and process variation. This 1.7 V nominal threshold is laser-trimmed during production and applies specifically to the 'LSN17' variant - not inferred from other NCP302 part numbers.
Does the NCP302LSN17T1 support programmable reset delay, and how is it implemented?
Yes, the NCP302LSN17T1 implements programmable delay via an external capacitor connected to pin 5 (CD). An internal 1.0 MΩ (typ) pull-up resistor forms an RC network; delay time scales linearly with capacitance and is documented in Figures 30–32 of the datasheet. No external resistor is needed.
What output configuration does the NCP302LSN17T1 use, and what are its drive capabilities?
The NCP302LSN17T1 uses a complementary output: pin 1 actively pulls low (N-ch sink, up to 3.5 mA at VOUT = 0.5 V) and actively pulls high (P-ch source, up to 9.7 mA at VOUT = 2.4 V). This eliminates need for external pull-up resistors and improves noise margin versus open-drain alternatives like NCP303LSN17T1.
Can the NCP302LSN17T1 operate from a 0.9 V supply?
No - the NCP302LSN17T1 requires minimum 0.8 V on pin 2 to function, but its specified operating range for full performance is 0.8 V to 10 V. However, the 1.7 V threshold means it is intended for monitoring rails ≥1.7 V; it cannot supervise sub-1.0 V domains like some ultra-low-voltage detectors.
Is the NCP302LSN17T1 pin-compatible with other NCP302 variants such as NCP302LSN18T1?
Yes - all NCP302xSNxxT1 variants (including NCP302LSN17T1 and NCP302LSN18T1) share identical SOT-23-5 pinout, package dimensions, and electrical interface. Only the detection threshold differs; no PCB redesign is needed when upgrading between 1.7 V and 1.8 V versions.
NCP302LSN17T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.7V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP302LSN17T1 FAQ
1.How can I place an order for NCP302LSN17T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP302LSN17T1 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 NCP302LSN17T1 reliable?
The price and inventory of NCP302LSN17T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP302LSN17T1 is usually 5 days.
3.What payment methods are accepted for NCP302LSN17T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP302LSN17T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP302LSN17T1?
NCP302LSN17T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP302LSN17T1 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 NCP302LSN17T1?
For technical support, including NCP302LSN17T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP302LSN17T1 requirements.
6.How does Aetrix verify that NCP302LSN17T1 is sourced from the original manufacturer or authorized distributors?
All NCP302LSN17T1 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 NCP302LSN17T1 meets industry standards.
7.What is the process for return or replacement of NCP302LSN17T1?
All NCP302LSN17T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP302LSN17T1, 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 NCP302LSN17T1 part is unused and in its original packaging.
Return procedure for NCP302LSN17T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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