onsemi NCP502SQ30T1

Overview

NCP502SQ30T1 from onsemi is a fixed-output, low-quiescent-current CMOS linear voltage regulator delivering 3.0 V at up to 80 mA with 40 µA typical quiescent current and 850 mV typical dropout voltage at 80 mA. It features PMOS pass transistor architecture, ±2.0% output voltage accuracy over temperature, and operates across −40 °C to +85 °C for portable battery-powered instrumentation and handheld communication devices.

For engineers reviewing the NCP502SQ30T1 datasheet, pinout, applications, or equivalent options, key selection considerations include ultra-low IQ for standby power budgeting, SC70-5 package footprint constraints, enable threshold compatibility (1.3 V high / 0.3 V low), and ceramic-capacitor stability without ESR requirements.

Technical Context

The NCP502SQ30T1 implements a PMOS-based LDO architecture with internal voltage reference, error amplifier, and thermal shutdown protection. Its enable input controls output state via logic-level thresholds, and it requires no minimum load or specific output capacitor ESR-enabling stable operation with 1.0 µF ceramic capacitors on both input and output.

Designed for low-power portable systems, it delivers regulated 3.0 V output while maintaining regulation down to 850 mV input-to-output differential at full 80 mA load and −40 °C to +85 °C ambient. Ripple rejection of 55 dB at 1 kHz and 180 µV_RMS output noise support clean power delivery in noise-sensitive analog and RF subsystems.

Key Specifications

Pinout & Package

Package: SC70-5 (Case 419A), 1.25 mm × 1.65 mm × 0.95 mm, Pb-free, surface-mount.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with MCP1700T-3002E/MB and XC6206P302MR-G, the NCP502SQ30T1 provides verified enable functionality and SC70-5 footprint in a 5-pin configuration-critical for designs requiring pin-strapped enable, minimal board area, and compatibility with fine-pitch routing in dense portable layouts.

Availability

NCP502SQ30T1 is available at Aetrix Electronics and suitable for portable medical sensors, wireless remote controls, handheld test instruments, and smart home sensors requiring stable component supply with long-lifecycle assurance.

Supply support for NCP502SQ30T1 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The NCP502 series belongs to onsemi's precision low-dropout linear regulator product line, engineered specifically for ultra-low-power portable electronics where battery life, small size, and ceramic-capacitor simplicity are primary design drivers.

FAQ

What is the maximum input voltage rating for the NCP502SQ30T1?

The NCP502SQ30T1 has an absolute maximum input voltage rating of 12 V, as specified in the Maximum Ratings table. Operation above this level risks permanent device damage. For reliable long-term use, keep Vin within 3.0 V to 12 V-ensuring at least 850 mV headroom above the 3.0 V output to maintain regulation at full 80 mA load.

Does the NCP502SQ30T1 require an external output capacitor, and what type is recommended?

Yes, the NCP502SQ30T1 requires a minimum 1.0 µF ceramic output capacitor (X5R or X7R dielectric) placed adjacent to the Vout and GND pins. The device is stable across a wide ESR range (a few mΩ to 5 Ω), eliminating the need for tantalum or aluminum electrolytic capacitors and simplifying layout and cost.

Can the NCP502SQ30T1 be used with a 2.0 V input supply?

No-the NCP502SQ30T1 cannot regulate 3.0 V output from a 2.0 V input. With a typical dropout voltage of 850 mV at 80 mA, the minimum valid input is approximately 3.85 V. At lighter loads, dropout decreases, but regulation fails below ~3.3 V input; for sub-3.0 V systems, consider a 2.8 V or 2.9 V variant like NCP502SQ28T2G.

What is the function of Pin 4 (N/C) on the NCP502SQ30T1 SC70-5 package?

Pin 4 of the NCP502SQ30T1 is designated N/C (No Connection) and has no internal bond wire or circuit connection. It may be left unconnected, tied to GND, or routed as a keep-out zone-its presence accommodates standardized SC70-5 leadframe design but contributes no electrical function in the NCP502SQ30T1.

Is the NCP502SQ30T1 RoHS-compliant and halogen-free?

Yes, the NCP502SQ30T1 is a Pb-free device compliant with RoHS Directive 2011/65/EU and meets JEDEC JS709B halogen-free requirements. The "G" suffix in alternate part numbers (e.g., NCP502SQ30T2G) explicitly denotes Pb-free packaging, and the SC70-5 package used for NCP502SQ30T1 carries the same environmental compliance.