onsemi NCP562SQ25T1G

Overview

NCP562SQ25T1G from onsemi is a fixed-output, low-dropout linear voltage regulator with 2.5 V output, 80 mA output current capability, 2.5 µA typical quiescent current, ±2.0% output voltage accuracy, and integrated enable control. It serves as a power management IC in battery-powered portable electronics where ultra-low standby power and stable low-voltage rail generation are critical.

For engineers reviewing the NCP562SQ25T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 80 mA (250 mV max), SC82-AB package thermal performance, enable threshold compatibility (1.3 V logic high), and ceramic capacitor stability with ≥0.1 µF output capacitance.

Technical Context

The NCP562SQ25T1G implements a PMOS pass transistor architecture enabling low dropout operation and eliminating reverse-current flow without external diodes. Its internal error amplifier, voltage reference, and protection circuits (current limit, thermal shutdown) operate across −40 °C to +85 °C ambient temperature.

Unlike the NCP563 variant, the NCP562SQ25T1G includes an active-high enable input (pin 4) that places the device into ultra-low-I_Q standby mode when pulled low; unused enable must be tied to V_IN. It requires no minimum load and supports ceramic output capacitors down to 0.1 µF with no ESR constraints.

Key Specifications

Pinout & Package

The NCP562SQ25T1G is housed in the SC82-AB (Case 419C) surface-mount package: 1.8–2.2 mm × 1.15–1.35 mm × 0.8–1.1 mm, 4-pin, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-2502E/TT and TNIV25025X, the NCP562SQ25T1G uniquely balances ultra-low 2.5 µA quiescent current, integrated enable, SC82-AB space efficiency, and guaranteed 80 mA output-making it optimal for compact, long-life portable systems where precise 2.5 V regulation and dynamic power gating are essential.

Availability

NCP562SQ25T1G is available at Aetrix Electronics and suitable for wearable health monitors, Bluetooth LE sensor nodes, digital camera viewfinders, and handheld barcode scanners requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for NCP562SQ25T1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP562 series belongs to onsemi's precision low-dropout regulator product line, engineered specifically for ultra-low-power portable electronics where battery longevity, small form factor, and reliable low-voltage regulation are primary design drivers.

FAQ

What is the maximum input voltage rating for the NCP562SQ25T1G?

The NCP562SQ25T1G has a maximum input voltage rating of 6.0 V, as specified in its Absolute Maximum Ratings table. Exceeding this voltage may cause permanent damage. This rating allows safe operation from common 5 V supplies, single-cell Li-ion batteries (up to 4.2 V), or two-series alkaline cells (up to ~3.2 V fresh), with margin for transient spikes. The NCP562SQ25T1G maintains regulation down to V_IN = V_OUT + dropout (250 mV), making it suitable for low-headroom applications.

Does the NCP562SQ25T1G require an external pull-up resistor on the Enable pin?

No, the NCP562SQ25T1G does not require an external pull-up resistor on the Enable pin. When the Enable function is unused, the datasheet explicitly states that the pin should be connected directly to V_IN-not through a resistor-to ensure reliable turn-on. The internal enable circuitry is designed for direct connection; adding a pull-up resistor introduces unnecessary leakage path and potential noise susceptibility. The NCP562SQ25T1G's enable threshold (1.3 V logic high) is compatible with standard 1.8 V and 3.3 V GPIO outputs.

What is the minimum output capacitor value required for stable operation of the NCP562SQ25T1G?

The minimum output capacitor value required for stable operation of the NCP562SQ25T1G is 0.1 µF ceramic, as confirmed in both the datasheet's "Features" section and "Applications Information" page. The regulator is internally compensated and exhibits unconditional stability across ceramic capacitor values from 0.1 µF to 10 µF, with no ESR requirements. Larger values (e.g., 1.0 µF) improve load transient response and noise rejection, but 0.1 µF is sufficient for basic regulation in space-constrained designs using the SC82-AB package.

How does the thermal performance of the NCP562SQ25T1G compare to SOT-23 LDOs?

The NCP562SQ25T1G in SC82-AB offers better thermal performance per unit area than standard SOT-23-5 LDOs due to its optimized thermal pad structure and lower R_JA of 400 °C/W (vs. typical 500–600 °C/W for SOT-23). At 25 °C ambient, it can dissipate up to 250 mW before reaching 125 °C junction temperature. In practice, with proper PCB copper pour under the exposed pad, the NCP562SQ25T1G sustains 80 mA at 3.5 V input–2.5 V output (80 mW dissipation) with minimal temperature rise-enabling reliable operation in sealed enclosures where SOT-23 parts would thermally throttle.

Is the NCP562SQ25T1G pin-compatible with the NCP563SQ25T1G?

No, the NCP562SQ25T1G is not pin-compatible with the NCP563SQ25T1G. While both share the SC82-AB package and identical pin 1–3 assignments (GND, V_IN, V_OUT), the NCP562SQ25T1G uses pin 4 as Enable, whereas the NCP563SQ25T1G assigns pin 4 as No Connect (N/C). Swapping them without board revision will leave the NCP562SQ25T1G's enable function unconnected (causing unintended disable) or short the NCP563SQ25T1G's N/C pin. The NCP562SQ25T1G and NCP563SQ25T1G are functional alternatives-not drop-in replacements-and require separate PCB layouts.