onsemi NCP4588DMX25TCG

Overview

NCP4588DMX25TCG from onsemi is a 2.5 V, 200 mA CMOS low-dropout linear voltage regulator with auto-discharge functionality, stable without output capacitor, 270 mV dropout at 200 mA, and 60 dB PSRR at 1 kHz - used in portable cameras and camcorders for clean, compact power delivery to image sensors and analog front-ends.

For engineers reviewing the NCP4588DMX25TCG datasheet, pinout, applications, or equivalent options, key selection criteria include capacitor-free operation, ultra-thin XDFN package (1.2 × 1.2 × 0.4 mm), enable-controlled shutdown with active discharge, low quiescent current (9.5 µA), and ±1% output accuracy over −40°C to +85°C.

Technical Context

The NCP4588DMX25TCG implements a PMOS pass transistor architecture enabling ultra-low dropout and inherent stability without external output capacitance. Its CE pin controls an internal NMOS discharge switch (D-version only), actively pulling VOUT to GND during disable to prevent floating rail issues in multi-rail systems.

It operates across 1.4 V to 5.25 V input, delivers 2.5 V ±1% output up to 200 mA, and maintains 60 dB PSRR at 1 kHz for noise-sensitive analog loads. Thermal design leverages the XDFN6 package's 250°C/W junction-to-air resistance, requiring minimal PCB copper for typical 150 mW dissipation.

Key Specifications

Pinout & Package

XDFN6 package: 1.2 mm × 1.2 mm × 0.4 mm body, 0.4 mm pitch, wettable flank terminals, Pb-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-2502E/TT and XC6206P252MR-G, the NCP4588DMX25TCG uniquely combines capacitor-free stability, integrated auto-discharge, and XDFN6 footprint - making it optimal for portable imaging systems requiring fast, safe power-down and minimal component count.

Availability

NCP4588DMX25TCG is available at Aetrix Electronics and suitable for portable cameras, camcorders, and USB video accessories requiring stable component supply, long-term lifecycle support, and Pb-free compliance.

Supply support for NCP4588DMX25TCG 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, and sensing solutions for automotive, industrial, and portable electronics.

The NCP4588DMX25TCG belongs to the NCP4588 family of capacitor-free LDOs designed specifically for space- and power-constrained portable imaging and communication equipment demanding high accuracy, low IQ, and robust enable-controlled operation.

FAQ

Does NCP4588DMX25TCG require an output capacitor?

No, the NCP4588DMX25TCG is explicitly designed to operate stably without any output capacitor - a key feature confirmed in its datasheet Figure 1 and APPLICATION INFORMATION section. While optional 0.1 µF to 10 µF ceramic capacitors may improve large-signal transient response, they are not needed for stability, simplifying layout and reducing BOM cost. This behavior is enabled by its internal compensation and PMOS pass device architecture.

What is the purpose of the NC pins on NCP4588DMX25TCG?

The NCP4588DMX25TCG has two NC (No Connection) terminals - Pin 1 and Pin 5 in the XDFN6 package. These pins are electrically isolated from the die and serve only mechanical or thermal roles (e.g., package symmetry, solder joint reinforcement). They must remain unconnected in circuit design and should not be tied to GND, VIN, or any other net - doing so risks compromising thermal performance or causing unintended leakage paths.

How does the auto-discharge function work in NCP4588DMX25TCG?

The NCP4588DMX25TCG (D-version) integrates an NMOS transistor between VOUT and GND, activated automatically when the CE pin falls below V_CEL (0.4 V). This provides active discharge of the output node, pulling VOUT to GND within microseconds. This prevents residual voltage from interfering with downstream logic states or causing latch-up during power sequencing - a critical capability in multi-rail portable systems where precise rail shutdown timing matters.

What is the maximum power dissipation of NCP4588DMX25TCG in its XDFN6 package?

The NCP4588DMX25TCG in XDFN6 has a specified maximum power dissipation of 400 mW at TA = 25°C, based on its thermal resistance R_JA = 250°C/W. At full 200 mA load with 2.77 V input (270 mV dropout), power dissipation is ~55 mW - well within safe limits. For higher ambient temperatures or sustained loads, derating per the thermal characteristics table on page 3 of the datasheet is required to maintain TJ ≤ 150°C.

Is NCP4588DMX25TCG compatible with 1.8 V GPIO enable signals?

Yes, the NCP4588DMX25TCG CE pin has a guaranteed logic-high threshold V_CEH ≤ 1.0 V and logic-low threshold V_CEL ≥ 0.4 V, making it fully compatible with 1.8 V CMOS outputs. A 1.8 V GPIO driving CE will reliably turn the NCP4588DMX25TCG on (since 1.8 V > 1.0 V) and off (since 0 V < 0.4 V), with margin for voltage drop across PCB traces or series resistors. No level-shifting is required.