onsemi NCP4624DMU12TCG

Overview

NCP4624DMU12TCG from onsemi is a CMOS 150 mA low-dropout linear voltage regulator with 1.2 V fixed output, 2.5–11 V input range, ±2% output accuracy, 2 µA quiescent current, and integrated reverse current protection. It operates from −40°C to +85°C and supports industrial equipment and battery-powered portable communication devices using 2-cell Li-ion sources.

For engineers reviewing the NCP4624DMU12TCG datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 150 mA (max 2.59 V for 1.2 V output), UDFN4 1.0 × 1.0 mm package footprint, enable-pin active-high control logic, and auto-discharge functionality for rapid output capacitor discharge during shutdown.

Technical Context

The NCP4624DMU12TCG implements a PMOS pass transistor architecture with internal reference and error amplifier, enabling stable regulation across wide input voltage swings while maintaining ultra-low quiescent current. Its reverse current protection circuit activates when VOUT exceeds VIN or VSET (1.2 V), with hysteresis defined by VREV_DET (55–100 mV) and VREV_REL (70–120 mV).

It features an active-high CE pin with internal pull-down (0.3–0.9 µA), threshold voltages of VCEH ≥ 1.7 V and VCEL ≤ 0.8 V, and built-in autodischarge NMOS (RDSON = 380 Ω) that connects VOUT to GND in disable mode-unique to the "D" version. Thermal performance is rated at RJA = 250 °C/W for the UDFN4 package.

Key Specifications

Pinout & Package

Package: UDFN4 1.0 × 1.0 mm, 0.65 mm pitch, exposed pad (EP) - optimized for space-constrained portable and industrial PCBs with high thermal efficiency (RJA = 250 °C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1202E/TT and XC6206P122MR-G, the NCP4624DMU12TCG uniquely supports up to 11 V input, integrates reverse current blocking and active auto-discharge, and provides precise CE control-making it the only option suitable for 2-cell Li-ion and industrial 9–10 V applications requiring safe, fast shutdown behavior.

Availability

NCP4624DMU12TCG is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, automotive infotainment accessories, and smart home hub controllers requiring stable component supply with guaranteed long-term availability.

Supply support for NCP4624DMU12TCG 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 IoT applications.

The NCP4624DMU12TCG belongs to onsemi's high-voltage, ultra-low-IQ LDO family designed specifically for battery-powered and industrial systems needing robust input tolerance, precision output, and integrated protection without external components.

FAQ

What is the maximum input voltage rating for the NCP4624DMU12TCG?

The NCP4624DMU12TCG has an absolute maximum input voltage of 12 V, with continuous operation specified up to 11 V. This allows direct connection to 2-cell Li-ion batteries (up to 8.4 V fully charged) and industrial 9–10 V rails while maintaining full parametric performance across −40°C to +85°C ambient temperature.

Does the NCP4624DMU12TCG require an external capacitor for stability?

Yes, the NCP4624DMU12TCG requires a minimum 0.1 µF ceramic output capacitor placed adjacent to the VOUT and GND pins. The datasheet confirms stable operation with this value; larger or lower-ESR capacitors improve transient response but are not mandatory for basic regulation. Input also requires a 0.1 µF ceramic decoupling capacitor.

How does the auto-discharge feature work in the NCP4624DMU12TCG?

The NCP4624DMU12TCG includes an internal NMOS transistor (RDSON = 380 Ω) between VOUT and GND that activates automatically when the CE pin is driven low. This discharges the output capacitor rapidly-typically clearing 1 µF in under 2 ms-ensuring clean power-down sequencing and preventing residual voltage from interfering with system reset or next-power-up behavior.

Is reverse current protection active across the full operating temperature range of the NCP4624DMU12TCG?

Yes, reverse current protection is functional across the full −40°C to +85°C junction temperature range. The protection circuit engages when VOUT exceeds 1.5 V and detects reverse bias via thresholds VREV_DET (55–100 mV) and VREV_REL (70–120 mV), both specified over temperature. No derating or external components are needed for reliable operation in industrial environments.

What is the thermal resistance (R_JA) of the NCP4624DMU12TCG in its UDFN4 package?

The NCP4624DMU12TCG in the UDFN4 1.0 × 1.0 mm package has a thermal resistance of R_JA = 250 °C/W under standard JEDEC test conditions. With proper PCB layout-including connection of the exposed pad to a thermal ground plane-this enables continuous 150 mA operation at ambient temperatures up to +70°C without exceeding the 150°C maximum junction temperature.