onsemi NCP4625HSN28T1G

Overview

NCP4625HSN28T1G from onsemi is a 2.8 V, 300 mA CMOS low-dropout linear regulator in SOT-23-5 package, operating from 2.6 V to 10 V input, with 770 mV dropout at full load and ±0.974–1.023 V output accuracy over −40°C to +85°C - used for stable power delivery in portable imaging modules and low-voltage microcontroller subsystems.

For engineers reviewing the NCP4625HSN28T1G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 300 mA output under 2.8 V nominal regulation, chip-enable active-high control with 1.7 V threshold, thermal shutdown at 165°C, stability with 1 µF ceramic output capacitor, and compatibility with two-cell Li-ion battery inputs (up to ~8.4 V).

Technical Context

The NCP4625HSN28T1G implements a CMOS-based LDO architecture with an internal N-channel pass transistor, enabling low quiescent current (23 µA) and high PSRR (70 dB at 1 kHz). Its enable logic is active-high with internal pull-down, and it lacks auto-discharge functionality (denoted by "H" prefix vs. "D" variants).

It delivers regulated 2.8 V output with line regulation of 0.02%/V and load regulation ≤70 mV across 0.1–300 mA, while maintaining stability without external compensation using only 1 µF ceramic capacitors on input and output - suitable for space-constrained, battery-powered systems requiring fast transient response and low-noise supply.

Key Specifications

Pinout & Package

SOT-23-5 (Case 1212) package with exposed pad not electrically connected; compact 2.9 × 2.8 mm footprint ideal for dense PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-2802E/TT and XC6206P282MR-G, the NCP4625HSN28T1G uniquely combines 300 mA capability, 10 V input rating, active-high CE, and 770 mV dropout at full load - making it optimal for battery-powered systems requiring robust enable control and wide-input flexibility.

Availability

NCP4625HSN28T1G is available at Aetrix Electronics and suitable for portable imaging modules, IoT sensor nodes, industrial HMI displays, and wearable biometric sensors requiring stable component supply with full traceability and long-term lifecycle planning.

Supply support for NCP4625HSN28T1G 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 management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The NCP4625HSN28T1G belongs to onsemi's NCP4625 family of CMOS LDO regulators designed for space-constrained, battery-powered applications demanding low quiescent current, high accuracy, and robust thermal protection.

FAQ

What is the maximum input voltage rating for the NCP4625HSN28T1G?

The NCP4625HSN28T1G has an absolute maximum input voltage rating of 12.0 V, but its recommended operating input voltage range is 2.6 V to 10.0 V. Operation above 10 V may compromise reliability or parametric performance, and the device is specifically characterized for stable regulation within that 2.6–10 V window. The NCP4625HSN28T1G is commonly used with two-cell Li-ion batteries whose fully charged voltage (~8.4 V) falls safely within this range.

Does the NCP4625HSN28T1G include an output discharge function?

No, the NCP4625HSN28T1G does not include an output discharge function. The "H" in the part number denotes the standard version without the internal VOUT-to-GND discharge transistor. Only the "D"-suffix variants (e.g., NCP4625DSN28T1G) integrate this feature. When the NCP4625HSN28T1G is disabled via the CE pin, the output remains floating and discharges only through the load or external circuitry.

What is the minimum output capacitance required for stability with the NCP4625HSN28T1G?

The NCP4625HSN28T1G is stable with a minimum 1 µF ceramic capacitor (X5R or X7R dielectric) placed directly at the VOUT pin. This value is validated across temperature and load conditions per the datasheet. Using lower capacitance or higher-ESR types (e.g., tantalum) risks instability or oscillation. The NCP4625HSN28T1G does not require additional ESR or series resistance for phase margin control.

Can the NCP4625HSN28T1G operate from a single Li-ion cell?

No, the NCP4625HSN28T1G cannot reliably regulate 2.8 V from a single Li-ion cell. Its minimum input voltage is 2.6 V, and its dropout voltage is 770 mV at 300 mA - meaning it requires at least 2.8 V + 0.77 V = 3.57 V to sustain full load. A single Li-ion cell drops below 3.57 V early in discharge, causing dropout and regulation loss. It is intended for two-cell configurations (nominal 7.4 V, max 8.4 V).

What is the thermal resistance (R_JA) of the NCP4625HSN28T1G in its SOT-23-5 package?

The NCP4625HSN28T1G in the SOT-23-5 package (Case 1212) has a junction-to-air thermal resistance (R_JA) of 238°C/W, as specified in the Thermal Characteristics table. This value assumes standard JEDEC test conditions (single-layer copper, no thermal relief). Actual board-level R_JA can be reduced significantly with proper PCB layout - including a thermal pad connected to ≥1 cm² of inner/outer copper pour - to support continuous 300 mA operation at elevated ambient temperatures.