onsemi NCP552SQ15T1

Overview

NCP552SQ15T1 from onsemi is a fixed-output 1.5 V CMOS low-I_Q NOCAP linear regulator in SC82-AB (SC70-4) package, featuring 2.8 µA typical quiescent current, ±2.0% output voltage accuracy, and an enable pin for ON/OFF control - designed for battery-powered portable electronics requiring ultra-low standby power.

For engineers reviewing the NCP552SQ15T1 datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 80 mA (max 1300 mV), industrial temperature range (−40°C to +85°C), capacitor-less operation capability, and PMOS pass transistor architecture enabling stable regulation with ceramic output capacitors down to 0.1 µF.

Technical Context

The NCP552SQ15T1 integrates a voltage reference, error amplifier, and PMOS power transistor in a single die, supporting true NOCAP operation - it functions stably without any output capacitor and accepts zero-ESR ceramic types when used. Its enable input is TTL-compatible with logic-high threshold ≥1.3 V and logic-low threshold ≤0.3 V.

Designed for low-noise, low-power systems, the device delivers 90 µV_RMS output noise (20 Hz–100 kHz), exhibits 100 ppm/°C output voltage temperature coefficient, and incorporates thermal shutdown (trip ~160°C) and current limiting (450 mA max short-circuit current at 5.0 V version).

Key Specifications

Pinout & Package

Package: SC82-AB (SC70-4), 1.8 mm × 1.15 mm × 0.8 mm body, 0.65 mm pitch, 4-pin surface-mount, Pb-free (RoHS compliant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1502E/TT, the NCP552SQ15T1 adds critical enable control at modest I_Q penalty; versus TPS78015QDSERQ1, it offers smaller size and lower cost for industrial/portable use but lacks automotive qualification and ultra-low-nA standby.

Availability

NCP552SQ15T1 is available at Aetrix Electronics and suitable for portable medical sensors, wireless remote controls, handheld barcode scanners, and smart home motion detectors requiring stable component supply with long-lifecycle support.

Supply support for NCP552SQ15T1 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and edge applications.

The NCP552SQ15T1 belongs to the NCP552 series of NOCAP LDO regulators, engineered specifically for ultra-low-power portable electronics where minimal quiescent current, small footprint, and capacitor-free operation are essential design requirements.

FAQ

What is the maximum input voltage rating for the NCP552SQ15T1?

The NCP552SQ15T1 has an absolute maximum input voltage rating of 12 V. Exceeding this value may cause permanent damage. For reliable operation, the recommended input range is 1.8 V to 12 V, with dropout performance optimized above V_out + 1.0 V. The device includes internal protection against transient overvoltage, but sustained operation near the 12 V limit requires careful thermal management due to increased power dissipation in the PMOS pass element.

Does the NCP552SQ15T1 require an output capacitor to operate?

No, the NCP552SQ15T1 is a true NOCAP regulator and operates stably without any output capacitor. This is enabled by its internal compensation and PMOS architecture. However, adding a 0.1 µF to 10 µF ceramic capacitor improves load transient response and noise rejection. The device remains stable across the full ESR range (0–10 Ω), making it compatible with low-ESR MLCCs and tantalum types - a key advantage over traditional LDOs requiring minimum ESR.

What is the function of the Enable pin on the NCP552SQ15T1?

The Enable pin on the NCP552SQ15T1 provides digital ON/OFF control: pulling it high (≥1.3 V) activates regulation; pulling it low (≤0.3 V) places the device in ultra-low-power shutdown (<0.1 µA I_Q). If unused, the pin must be tied directly to Vin to ensure normal operation. This feature enables precise power sequencing in multi-rail systems and extends battery life in duty-cycled applications - a capability absent in the pin-compatible NCP553 variant.

What is the dropout voltage specification for the NCP552SQ15T1 at full load?

At 80 mA output current and over the full operating temperature range (−40°C to +125°C), the NCP552SQ15T1 has a maximum dropout voltage of 1300 mV. At room temperature and 10 mA load, typical dropout is significantly lower (~650 mV). This parameter defines the minimum headroom required between input and output to maintain regulation - for example, to sustain 1.5 V output at 80 mA from a 3.0 V battery, the battery must remain above 2.8 V.

Is the NCP552SQ15T1 RoHS-compliant and lead-free?

Yes, the NCP552SQ15T1 is RoHS-compliant and manufactured in a Pb-free (lead-free) package per onsemi's standard. The SC82-AB (SC70-4) package carries the "SQ" suffix and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30°C/60% RH. Full compliance documentation, including substance declarations and test reports, is available through onsemi's quality portal upon request.