onsemi NCP300LSN30T1

Overview

NCP300LSN30T1 from onsemi is a complementary-output voltage detector IC designed for microprocessor reset control in battery-powered systems. It features a 3.0 V ±2.0% undervoltage detection threshold, 0.15 V typical 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 reliable power monitoring in portable embedded devices.

For engineers reviewing the NCP300LSN30T1 datasheet, pinout, applications, or equivalent options, this device serves as a precision, ultra-low-power reset supervisor where extended battery life, accurate brownout detection, and stable operation across −40°C to +125°C are critical design requirements.

Technical Context

The NCP300LSN30T1 implements a precision bandgap-based comparator with internal hysteresis to prevent oscillation near the 3.0 V threshold. Its complementary output stage provides both sourcing (P-ch) and sinking (N-ch) capability on Pin 1, enabling direct interface with microcontroller reset inputs without external pull-up or pull-down components.

It operates over an input voltage range of 0.8 V to 10 V and maintains detection accuracy across temperature via trimming-VDET− is specified at ±3% over −40°C to +125°C for this 3.0 V variant. Propagation delay is 49 ns (high-to-low) and 115 ns (low-to-high) under standard test conditions.

Key Specifications

Pinout & Package

Package: TSOP-5 (SOT23-5), 5-pin thin shrink small outline package with 0.65 mm pitch and exposed pad for thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage detector applications.

Compared with TLV803EB30DBZR and MAX809SEUR+T, the NCP300LSN30T1 uniquely combines ultra-low IQ, complementary output, full industrial temperature support, and tight threshold accuracy-making it optimal for long-life, high-reliability embedded systems where reset integrity cannot be compromised.

Availability

NCP300LSN30T1 is available at Aetrix Electronics and suitable for microprocessor reset control, low-battery detection, power-fail indication, and battery backup switchover applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for NCP300LSN30T1 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 (Nasdaq: ON) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP300 series belongs to onsemi's precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy reset control in battery-constrained and thermally demanding environments.

FAQ

What is the exact detection threshold voltage of the NCP300LSN30T1?

The NCP300LSN30T1 has a nominal detection threshold of 3.0 V, with a tolerance of ±2.0% at 25°C and ±3% over the full operating temperature range of −40°C to +125°C. This value is confirmed in Table 1 of the official datasheet (NCP300/D Rev. 31), where VDET− is listed as 2.940 V (min), 3.000 V (typ), and 3.060 V (max) at 25°C. The NCP300LSN30T1 uses internal trimming to achieve this accuracy without external components.

Does the NCP300LSN30T1 require external pull-up or pull-down resistors?

No, the NCP300LSN30T1 does not require external pull-up or pull-down resistors because it features a complementary output stage with integrated P-channel and N-channel MOSFETs on Pin 1. This allows it to actively drive high or low without external biasing-unlike open-drain or push-pull-only alternatives. The NCP300LSN30T1 datasheet explicitly confirms this architecture in Figure 1 and the "Features" section.

What is the quiescent current of the NCP300LSN30T1 under typical operating conditions?

The NCP300LSN30T1 draws 0.5 µA typical quiescent current when supplied at Vin = 2.87 V (VDET− − 0.13 V), as specified in Table 1 of the datasheet. At higher input voltages (e.g., Vin = 5.0 V), typical current rises to 0.9 µA. This ultra-low IQ enables multi-year operation on coin-cell batteries and is a defining feature of the NCP300LSN30T1 series.

Can the NCP300LSN30T1 operate down to 0.8 V input voltage?

Yes, the NCP300LSN30T1 is fully specified to operate with input voltages as low as 0.8 V, per the "Maximum Ratings" table (page 2) and "Electrical Characteristics" (page 6). Its minimum operating voltage is guaranteed at 0.55 V (min) to 0.80 V (max) depending on temperature, enabling reliable brownout detection even as batteries approach end-of-life-critical for the NCP300LSN30T1's role in portable systems.

Is the NCP300LSN30T1 pin-compatible with other devices in the NCP300 family?

Yes, all NCP300xSNxxT1 variants-including NCP300LSN30T1-share identical TSOP-5 (SOT23-5) pinout and complementary output architecture. Differences are limited to detection threshold (e.g., 3.0 V vs. 2.7 V), suffix ('L' = active-low, 'H' = active-high), and minor electrical specs. This allows direct substitution within the same package footprint, provided the threshold and output polarity match system requirements.