onsemi NCP160BMX500TBG

Overview

NCP160BMX500TBG from onsemi is a 250 mA ultra-low-noise, high-PSRR LDO regulator with fixed 5.0 V output, 80 mV dropout at full load, ±2% output accuracy over load/temperature, and 10 µV_RMS integrated noise (10 Hz–100 kHz). It targets RF and analog power rails in smartphones, wireless LAN modules, and camera subsystems where clean, stable voltage is critical.

For engineers reviewing the NCP160BMX500TBG datasheet, pinout, applications, or equivalent options, key selection criteria include its 5.0 V fixed output, non-active-discharge enable logic, XDFN4 1 mm × 1 mm package, 98 dB PSRR at 1 kHz, and compatibility with 1 µF ceramic input/output capacitors.

Technical Context

The NCP160BMX500TBG uses a PMOS pass transistor architecture enabling low dropout and inherent reverse-current protection. Its bandgap reference and integrated soft-start ensure stable startup without output overshoot under varying load conditions.

Unlike active-discharge variants (e.g., "A" suffix), the "B" version omits the internal 280 Ω discharge path - simplifying biasing when fast output decay is unnecessary and reducing quiescent current to 18 µA typical during regulation and 0.1 µA in shutdown.

Key Specifications

Pinout & Package

XDFN4 package (Case 711AJ): 1 mm × 1 mm × 0.4 mm, exposed pad (EPAD) for thermal enhancement, RoHS-compliant, Pb-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCP160BMX500TBG, the XC6210B502MR-G delivers more current but sacrifices noise performance and package size, while the MIC5205-5.0YM5 offers lower cost and maturity at the expense of output capability and PSRR - making NCP160BMX500TBG optimal for next-gen RF/analog co-location.

Availability

NCP160BMX500TBG is available at Aetrix Electronics and suitable for smartphone RF modules, wireless LAN baseband ICs, and industrial camera sensor bias applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for NCP160BMX500TBG 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 communications markets.

The NCP160 series is designed specifically for ultra-low-noise, high-PSRR regulation in RF and precision analog signal chains - prioritizing spectral purity, transient response, and small-footprint integration in portable electronics.

FAQ

What is the maximum input voltage for the NCP160BMX500TBG?

The NCP160BMX500TBG supports an absolute maximum input voltage of 6 V. Its operational input range is 1.9 V to 5.5 V, meaning it can regulate a stable 5.0 V output from inputs as low as 5.08 V (accounting for 80 mV dropout at 250 mA). Exceeding 6 V risks permanent damage per Absolute Maximum Ratings.

Does the NCP160BMX500TBG include active output discharge?

No, the NCP160BMX500TBG does not include active output discharge. The "B" in the part number denotes the non-active-discharge variant - unlike "A"-suffix versions, it lacks the internal 280 Ω discharge resistor. When disabled via EN, the output floats rather than being pulled to GND, which simplifies biasing in applications where rapid discharge is unnecessary.

Can the NCP160BMX500TBG operate with ceramic capacitors smaller than 1 µF?

The NCP160BMX500TBG is characterized for stability with ≥1 µF ceramic output capacitance. While it may remain stable down to 0.7 µF (accounting for DC bias derating), using smaller values risks instability or degraded transient response. For reliable operation across temperature and voltage, 1 µF X7R/X5R MLCCs placed adjacent to the OUT pin are mandatory per the datasheet.

What is the thermal resistance (R_JA) of the NCP160BMX500TBG in its XDFN4 package?

The NCP160BMX500TBG in XDFN4 package has a junction-to-ambient thermal resistance (R_JA) of 198.1 °C/W under JEDEC-standard board conditions (1 oz copper). With enhanced PCB copper area (e.g., 2 oz copper and extended thermal pad), R_JA can improve significantly - Figure 54 shows R_JA dropping to ~170 °C/W with 400 mm² of 2 oz copper.

How does the enable pin threshold behave across temperature for the NCP160BMX500TBG?

The NCP160BMX500TBG's EN pin thresholds are specified as V_ENH = 1.2 V (enable) and V_ENL = 0.4 V (disable), with minimal drift over −40°C to +125°C. Figure 28 confirms these thresholds remain within ±0.1 V across temperature, ensuring robust GPIO interfacing without external hysteresis in most host controller designs.