onsemi NCP4620DSN15T1G

Overview

NCP4620DSN15T1G from onsemi is a 150 mA, 1.5 V fixed-output CMOS low-dropout linear regulator in SOT-23-5 package, operating from 2.6 V to 10 V input, with ±1.0% output accuracy, 165 mV dropout at 100 mA (3.3 V version), and integrated chip enable for power management in space-constrained portable electronics.

For engineers reviewing the NCP4620DSN15T1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal behavior, enable-controlled shutdown, auto-discharge functionality, and real-world load/line transient performance data per ON Semiconductor's Rev. 4 datasheet.

Technical Context

The NCP4620DSN15T1G implements a CMOS-based LDO architecture with internal voltage reference, error amplifier, and P-channel pass transistor-enabling low quiescent current (23 µA) and stable regulation across −40°C to +85°C ambient. Its CE pin accepts TTL-compatible logic high (≥1.7 V) to activate regulation and includes an internal pull-down current source (0.3 µA).

This D-version variant integrates an output discharge transistor between VOUT and GND, activated during disable mode to rapidly deplete external output capacitance-critical for sequencing-sensitive systems requiring controlled power-down. Thermal shutdown triggers at 165°C junction temperature with hysteresis (release at 110°C).

Key Specifications

Pinout & Package

SOT-23-5 package (Case 1212), 2.9 × 2.8 × 1.15 mm body, Pb-free, RoHS-compliant, with exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1502E/TT and XC6206P152MR-G, the NCP4620DSN15T1G uniquely combines CE control, auto-discharge, 70 dB PSRR, and 23 µA IQ in SOT-23-5 - making it optimal for sequenced, noise-sensitive, medium-duty-cycle portable systems.

Availability

NCP4620DSN15T1G is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, smart home camera modules, and consumer audio accessories requiring stable component supply, automotive-grade reliability, and long-term production continuity.

Supply support for NCP4620DSN15T1G 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, cloud, and consumer markets.

The NCP4620DSN15T1G belongs to onsemi's NCP4620 series of CMOS LDO regulators designed specifically for space-constrained, battery-powered applications demanding low IQ, precise output voltage, and robust protection features.

FAQ

What is the maximum input voltage rating for the NCP4620DSN15T1G?

The NCP4620DSN15T1G has an absolute maximum input voltage rating of 12.0 V, but its recommended operating input voltage range is 2.6 V to 10 V. Operation above 10 V may degrade long-term reliability or trigger overvoltage stress, even if within absolute maximum limits. The NCP4620DSN15T1G is optimized for single-cell Li-ion (up to 4.2 V) or dual-cell alkaline (up to 3.2 V) inputs.

Does the NCP4620DSN15T1G include output auto-discharge functionality?

Yes, the NCP4620DSN15T1G is the "D" version of the NCP4620 family and includes an integrated discharge transistor between VOUT and GND. When the CE pin is driven low, this transistor actively pulls the output capacitor to ground, enabling rapid discharge-critical for power sequencing in multi-rail systems. This feature is absent in the "H" (standard) variants like NCP4620HSN15T1G.

What is the dropout voltage of the NCP4620DSN15T1G at full 150 mA load?

At 150 mA output current and 1.5 V nominal output, the NCP4620DSN15T1G exhibits a typical dropout voltage of 400 mV (as specified in the Electrical Characteristics table for 1.2 V ≤ VOUT < 1.3 V). This means VIN must be ≥1.9 V to maintain regulation. Dropout increases with output voltage; for example, it is 580 mV at 150 mA for a 3.3 V version.

Can the NCP4620DSN15T1G operate with ceramic output capacitors?

Yes, the NCP4620DSN15T1G is explicitly characterized and guaranteed stable with ≥1 µF ceramic capacitors (X5R/X7R dielectrics) on the output. Unlike older LDOs requiring minimum ESR, this device uses a CMOS architecture that eliminates ESR dependency-reducing cost, size, and failure risk compared to tantalum alternatives.

What thermal protection features does the NCP4620DSN15T1G provide?

The NCP4620DSN15T1G incorporates thermal shutdown with a trip temperature of 165°C and hysteresis-based release at 110°C. It also includes current fold-back limiting (40 mA short-circuit current), preventing destructive power dissipation during sustained overloads. These protections are fully integrated and require no external components to function.