onsemi NCP700BMT30TBG

Overview

NCP700BMT30TBG from onsemi is a 200 mA ultra-low-noise, high-PSRR LDO regulator in WDFN6 (1.5 mm × 1.5 mm) package, delivering 3.0 V ±2.5% output with 115 mV typical dropout at 200 mA, 10 µV_RMS output noise (10 Hz–100 kHz, C_noise = 100 nF), and 82 dB PSRR at 1 kHz - engineered for RF power amplifier biasing in cellular handsets.

For engineers reviewing the NCP700BMT30TBG datasheet, pinout, applications, or equivalent options, key selection criteria include its BiCMOS process enabling simultaneous low ground current (70 µA no-load), active discharge, enable control with 5 MΩ internal pull-down, and stability with 1 µF ceramic output capacitors.

Technical Context

The NCP700BMT30TBG uses a BiCMOS architecture to merge bipolar precision (ultra-low noise, high PSRR) with CMOS efficiency (70 µA no-load ground current). Its PMOS pass transistor enables reverse-current protection and low dropout, while the dedicated BYP pin provides direct access to the bandgap reference node for external noise filtering via a 10–100 nF capacitor.

Enable logic operates with 0.4 V (max) low threshold and 1.2 V (min) high threshold; internal 5 MΩ pull-down ensures default-off behavior when EN floats. Active discharge engages on disable via a 1 kΩ internal path to rapidly collapse V_OUT, critical for sequencing-sensitive RF subsystems.

Key Specifications

Pinout & Package

Package: WDFN6 (1.5 mm × 1.5 mm, 0.75 mm height, wettable flank), case 511BJ, Pb-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B302MR-G and ADP125ARHZ-3.0-R7, the NCP700BMT30TBG uniquely delivers sub-10 µV_RMS noise via the BYP pin while maintaining 70 µA no-load IQ and WDFN6 footprint - making it optimal for RF-critical, space-constrained designs where noise performance is non-negotiable.

Availability

NCP700BMT30TBG is available at Aetrix Electronics and suitable for cellular handset power amplifiers, portable RF transceivers, and precision analog sensor supplies requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for NCP700BMT30TBG 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 is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The NCP700B series is part of onsemi's high-performance analog portfolio, designed specifically for noise-sensitive RF and precision analog systems where ultra-low noise, high PSRR, and compact packaging are essential.

FAQ

What is the maximum input voltage rating for the NCP700BMT30TBG?

The NCP700BMT30TBG has an absolute maximum input voltage rating of 6 V. Operation above this voltage risks permanent damage. For reliable 3.0 V output, the recommended input range is 2.5 V to 5.5 V - ensuring adequate headroom across battery discharge profiles while maintaining specified dropout and regulation performance. Always observe derating guidelines per the datasheet's thermal characteristics table.

Does the NCP700BMT30TBG require an external capacitor on the BYP pin?

Yes, the NCP700BMT30TBG requires an external capacitor (10–100 nF) between BYP and GND to achieve its specified 10 µV_RMS output noise. Without this capacitor, noise rises to 15 µV_RMS. The capacitor must be placed close to the BYP pin with minimal trace length; values below 10 nF risk turn-on overshoot, while values above 100 nF increase turn-on time without meaningful noise improvement.

How does the enable function behave when the EN pin is left unconnected?

When the EN pin of the NCP700BMT30TBG is left unconnected, its internal 5 MΩ pull-down resistor forces the pin to GND, disabling the regulator and reducing quiescent current to ≤1 µA. This fail-safe behavior ensures the device remains off during power-up sequencing or if the enable signal is omitted - eliminating risk of unintended output activation in battery-powered systems.

Can the NCP700BMT30TBG be used with a 1 µF output capacitor?

Yes, the NCP700BMT30TBG is explicitly characterized and guaranteed stable with a minimum 1 µF X5R or X7R ceramic output capacitor. Larger values (e.g., 4.7 µF) improve transient response but are not required. Avoid high-ESR capacitors (e.g., standard aluminum electrolytics); ESR must remain within 10–100 mΩ per Figure 56 to maintain phase margin and avoid oscillation.

What protection features are integrated into the NCP700BMT30TBG?

The NCP700BMT30TBG integrates current limit protection (310 mA typ.), short-circuit protection (320 mA typ. at V_OUT = 0 V), thermal shutdown (150 °C trip, 135 °C reset), and active output discharge (1 kΩ internal path). It also includes reverse-current blocking via the PMOS pass device body diode - preventing output capacitor discharge back into the input during VIN collapse, provided C_OUT ≤ 22 µF.