onsemi NCP133AMX130TCG

Overview

NCP133AMX130TCG from onsemi is a 500 mA very low dropout (VLDO) CMOS voltage regulator with NMOS pass transistor and dedicated bias rail (VBIAS), delivering stable 1.30 V output for noise-sensitive, space-constrained portable electronics. It features ±1.5% output accuracy over temperature, 140 mV typical dropout at 500 mA, and ultra-low 80 µA bias supply current - enabling high-efficiency power delivery in battery-powered systems such as smartphone core logic rails.

For engineers reviewing the NCP133AMX130TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its dual-rail architecture (VIN/VBIAS), active output discharge capability, XDFN6 1.2 mm × 1.2 mm package, and compatibility with 2.2 µF ceramic output capacitors without external compensation.

Technical Context

The NCP133AMX130TCG implements a dual-input VLDO architecture where VIN supplies the pass element and VBIAS powers internal control circuitry independently - decoupling regulation stability from input rail noise. Its NMOS pass transistor enables lower dropout than PMOS alternatives and reduces sensitivity to output capacitor ESR.

It integrates undervoltage lockout on VBIAS (1.6 V threshold with 0.2 V hysteresis), thermal shutdown (160°C trip), and current limiting (550–1000 mA). The fixed 1.30 V output version includes active output discharge (enabled during disable), unlike adjustable variants which require external resistor networks.

Key Specifications

Pinout & Package

XDFN6 package (Case 711AT), 1.2 mm × 1.2 mm × 0.4 mm, thermally enhanced with exposed pad soldered to ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar very low dropout voltage regulator applications.

Compared with TPS7A0513PDBVR and MCP1826T-1302E/DB, the NCP133AMX130TCG uniquely combines dual-rail architecture, active output discharge, and sub-150 mV dropout at 500 mA - making it optimal for noise-critical, battery-operated systems requiring precise 1.30 V regulation with robust power sequencing.

Availability

NCP133AMX130TCG is available at Aetrix Electronics and suitable for smartphone I/O power, camera sensor core supplies, portable DVR audio codecs, and STB HDMI interface power requiring stable component supply across production volumes and lifecycle phases.

Supply support for NCP133AMX130TCG 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 NCP133AMX130TCG belongs to onsemi's high-precision, ultra-low-noise VLDO family designed specifically for battery-powered portable electronics demanding tight voltage tolerance, minimal dropout, and compact packaging.

FAQ

What is the output voltage tolerance of the NCP133AMX130TCG over temperature?

The NCP133AMX130TCG provides ±1.5% output voltage accuracy across the full operating junction temperature range of −40°C to +85°C. At 25°C, the tolerance tightens to ±0.5%, ensuring precise 1.30 V regulation for sensitive digital loads. This specification is verified under defined test conditions including VBIAS ≥ (VOUT + 1.4 V), 1 mA ≤ IOUT ≤ 500 mA, and VIN = VOUT(NOM) + 0.3 V.

Does the NCP133AMX130TCG require an external resistor network to set its output voltage?

No, the NCP133AMX130TCG is a fixed-output variant delivering 1.30 V without external components. Unlike the adjustable NCP133AMXADJTCG, it does not use an ADJ pin or feedback resistors. Its marking code "F" (per ordering table) confirms the 1.30 V fixed output, and pin 2 is a true no-connect (NC), not an ADJ terminal.

What is the purpose of the separate BIAS pin on the NCP133AMX130TCG?

The BIAS pin on the NCP133AMX130TCG supplies power exclusively to the internal reference, error amplifier, and protection circuitry - isolating them from the main input (VIN) rail. This dual-rail architecture improves PSRR (80 dB at 1 kHz), reduces noise coupling, and allows stable operation even when VIN is noisy or near dropout, while supporting bias voltages from 2.4 V to 5.5 V.

Is active output discharge enabled on the NCP133AMX130TCG?

Yes, the NCP133AMX130TCG includes integrated active output discharge. When the EN pin is driven low, an internal 150 Ω pull-down connects OUT to GND, rapidly discharging load capacitance. This feature is confirmed in the block diagram (Figure 2) and electrical characteristics table (RDISCH = 150 Ω), and distinguishes the "A" series (e.g., NCP133AMXxxxTCG) from non-discharge "B" variants.

What minimum output capacitor is required for stability with the NCP133AMX130TCG?

The NCP133AMX130TCG is stable with a minimum 2.2 µF ceramic output capacitor - no additional ESR or external compensation is needed. This value represents effective capacitance under DC bias and temperature; designers should select X5R/X7R dielectrics rated for ≥6.3 V and verify actual capacitance at 1.30 V bias using manufacturer derating curves to ensure stability across operating conditions.