onsemi NCP114BMX120TCG

Overview

NCP114BMX120TCG from onsemi is a 300 mA CMOS low-dropout (LDO) voltage regulator with fixed 1.2 V output, operating from 1.7 V to 5.5 V input. It delivers ±1% output accuracy at room temperature, 135 mV typical dropout at 300 mA, and 75 dB PSRR at 1 kHz-optimized for noise-sensitive, space-constrained battery-powered devices such as smartphones and portable medical equipment.

For engineers reviewing the NCP114BMX120TCG datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low quiescent current (50 µA typ.), stable operation with 1 µF ceramic output capacitor, thermal shutdown and current limit protection, and UDFN4 1.0×1.0 mm package suitability for high-density PCB layouts.

Technical Context

The NCP114BMX120TCG employs a PMOS pass transistor architecture enabling low dropout and reverse-current blocking via inherent body diode control. Its dynamic quiescent current adjustment minimizes IQ at no-load while maintaining fast load transient response-critical for intermittent-duty portable systems.

It integrates enable logic with 0.9 V turn-on / 0.4 V shutdown thresholds, internal current limiting (600 mA typ.), and thermal shutdown at 160 °C with 20 °C hysteresis. Unlike version "A", this "B" suffix variant lacks active output discharge functionality.

Key Specifications

Pinout & Package

Package: UDFN4 (1.0 mm × 1.0 mm, 0.65 mm pitch), Pb-free, with exposed thermal pad (EPAD) requiring direct connection to GND plane for optimal thermal performance (R_JA = 170 °C/W on 1 oz FR-4 with 645 mm² copper).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1804T-1202I/OT and XC6210B122MR-G, the NCP114BMX120TCG provides superior current capability, lower dropout, and integrated enable control in a smaller UDFN4 package-making it optimal for high-density, battery-life-critical portable designs requiring precise 1.2 V regulation.

Availability

NCP114BMX120TCG is available at Aetrix Electronics and suitable for smartphone power management, portable medical sensors, wireless audio devices, and industrial handheld scanners requiring stable component supply with consistent lead times and full traceability.

Supply support for NCP114BMX120TCG 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, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The NCP114 series is part of onsemi's precision analog LDO portfolio, designed specifically for ultra-low-power, noise-sensitive battery-operated applications where small size, low IQ, and high PSRR are critical system requirements.

FAQ

What is the output voltage tolerance of the NCP114BMX120TCG over temperature?

The NCP114BMX120TCG maintains ±1% output voltage accuracy at room temperature (25°C). Over the full operating junction temperature range (−40°C to +85°C), output voltage deviation is specified as ±40 mV for VOUT ≤ 2.0 V-equivalent to ±3.3% for the 1.2 V output-ensuring robust performance across environmental extremes without external trimming.

Does the NCP114BMX120TCG include active output discharge?

No, the NCP114BMX120TCG does not include active output discharge. The "B" suffix explicitly denotes absence of the active discharge transistor present in "A"-suffix variants (e.g., NCP114AMX120TCG). When disabled via EN pin, the output floats; external pull-down may be required if rapid discharge is needed.

What is the minimum output capacitance required for stability with the NCP114BMX120TCG?

The NCP114BMX120TCG is stable with a minimum 1 µF X5R or X7R ceramic capacitor on the OUT pin. The device tolerates effective capacitance as low as 0.22 µF (accounting for DC bias and temperature derating), but 1 µF is the recommended value to ensure robust phase margin and transient response across all operating conditions.

Can the NCP114BMX120TCG operate from a 1.8 V input supply?

Yes, the NCP114BMX120TCG operates with input voltages from 1.7 V to 5.5 V. At 1.8 V input, the dropout headroom is 0.6 V, well above the 135 mV typical dropout at 300 mA-ensuring full regulation and load capability even at near-minimum VIN, making it suitable for partially discharged Li-ion cells.

What thermal resistance does the NCP114BMX120TCG exhibit in its UDFN4 package?

In the UDFN4 1.0×1.0 mm package, the NCP114BMX120TCG has a junction-to-ambient thermal resistance (R_JA) of 170 °C/W when mounted on a standard 1 oz FR-4 PCB with 645 mm² copper area. This value improves significantly with larger ground planes or 2 oz copper, enabling reliable 300 mA operation in compact thermal environments.