onsemi NCP4569DM30R2

Overview

NCP4569DM30R2 from onsemi is a fixed 3.0 V, 300 mA CMOS low-dropout (LDO) regulator with shutdown control and VREF bypass input. It delivers ±0.5% output voltage accuracy, 240 mV typical dropout at full load, and ultra-low 50 µA quiescent current - enabling long battery life in portable medical instruments and GSM phones.

For engineers reviewing the NCP4569DM30R2 datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 300 mA output under 2.5–6.0 V input, 0.05 µA shutdown current, 260 nV/√Hz output noise with optional 470 pF bypass capacitor, and thermal/overcurrent protection in Micro-8 package.

Technical Context

The NCP4569DM30R2 uses a CMOS pass transistor architecture to achieve near-constant 50 µA supply current across 0.1 µA–300 mA load range - unlike bipolar LDOs whose quiescent current rises with load. Its internal reference is bypassable via Pin 5 to reduce output noise by filtering reference voltage ripple.

Shutdown is implemented via TTL/CMOS-compatible SHDN input (Pin 7), pulling VOUT to 0 V and reducing supply current to 0.05 µA typical. Stability is ensured with only 1.0 µF ceramic output capacitance (ESR ≤ 5 Ω), and protection includes thermal shutdown at 150°C and foldback overcurrent limiting.

Key Specifications

Pinout & Package

Package: Micro-8 (Case 846A), 2.9 mm × 2.9 mm, 0.65 mm pitch, surface-mount. Exposed pad not present; thermal dissipation relies on PCB copper area connected to GND (Pin 4).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-3002E/MB and TLS850B2TE/V33, the NCP4569DM30R2 uniquely balances ultra-low noise (with bypass), ±0.5% accuracy, 50 µA IQ, and Micro-8 footprint - making it optimal for portable instrumentation and medical sensors where precision, size, and battery life are jointly constrained.

Availability

NCP4569DM30R2 is available at Aetrix Electronics and suitable for battery-operated medical instruments, GSM phone baseband power, and portable instrumentation requiring stable component supply with guaranteed 300 mA output and ±0.5% voltage accuracy.

Supply support for NCP4569DM30R2 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.

The NCP4569DM30R2 belongs to onsemi's precision CMOS LDO family, designed specifically for battery-powered portable systems demanding ultra-low quiescent current, high accuracy, and low noise - without sacrificing thermal robustness or small footprint.

FAQ

What is the minimum input voltage required for NCP4569DM30R2 to maintain regulation?

The NCP4569DM30R2 requires a minimum input voltage of 3.24 V to sustain 3.0 V output at full 300 mA load, based on its 240 mV typical dropout voltage. At lighter loads, dropout decreases - e.g., 20 mV at 0.1 mA - allowing operation down to ~3.02 V. Input must stay within 2.5–6.0 V absolute rating.

Does NCP4569DM30R2 require an external capacitor on the Bypass pin to function?

No, the NCP4569DM30R2 operates fully functional without any capacitor on the Bypass pin (Pin 5). The 470 pF capacitor is optional and only needed when ultra-low output noise (<100 nV/√Hz) is required - such as for precision ADC references or RF signal chains. Leaving Pin 5 open degrades noise performance but does not affect regulation or stability.

How does the shutdown feature of NCP4569DM30R2 behave during power-down sequences?

When SHDN (Pin 7) is pulled low (<15% VIN), the NCP4569DM30R2 disables its pass element, driving VOUT to 0 V and reducing supply current to 0.05 µA typical. This provides true zero-output-state shutdown - critical for preventing back-powering of downstream circuitry and minimizing system standby leakage in multi-rail architectures.

Can NCP4569DM30R2 be used with ceramic output capacitors smaller than 1.0 µF?

No - the NCP4569DM30R2 is specified and tested for stability with a minimum 1.0 µF ceramic output capacitor (ESR ≤ 5 Ω). Using smaller values risks oscillation or poor transient response. The datasheet explicitly states "stable with an output capacitor of only 1.0 µF", confirming this as the verified lower limit for reliable operation.

What thermal protection behavior does NCP4569DM30R2 exhibit under sustained overload?

The NCP4569DM30R2 incorporates thermal shutdown that activates at ~150°C junction temperature, disabling output until die temperature falls to ~140°C. During overload, it first engages foldback current limiting (short-circuit current ~550–650 mA), then transitions to thermal shutdown if power dissipation exceeds safe limits - preventing permanent damage while allowing automatic recovery once cooled.