onsemi NCP160BFCS285T2G

Overview

NCP160BFCS285T2G from onsemi is a 250 mA ultra-low-noise, high-PSRR LDO regulator with fixed 2.85 V output, 80 mV dropout at full load, ±2% output accuracy over load/temperature, and active discharge disabled (non-A version). It delivers 10 µV_RMS noise and 98 dB PSRR at 1 kHz - optimized for RF power amplifiers and analog signal chains in space-constrained mobile devices.

For engineers reviewing the NCP160BFCS285T2G datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.85 V fixed output, WLCSP4 0.64 mm × 0.64 mm package with 90° marking rotation, absence of active discharge, and compatibility with 1 µF ceramic input/output capacitors.

Technical Context

The NCP160BFCS285T2G uses a PMOS pass transistor architecture enabling low dropout and inherent reverse-current protection. Its bandgap reference and integrated soft-start ensure stable startup under light-to-heavy load transitions without external compensation.

Unlike the 'A' variant, the 'B' suffix denotes no active output discharge - EN pin assertion disables regulation but leaves VOUT floating. Thermal shutdown (160°C trip, 140°C reset) and current limiting (700 mA typ.) operate across −40°C to +125°C junction temperature range.

Key Specifications

Pinout & Package

Package: WLCSP4 (Case 567JZ), 0.64 mm × 0.64 mm × 0.33 mm, Pb-free, RoHS compliant, marking rotation 90°, top-side marking "F" for 2.85 V variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B285MR-G and BD3508EFJ-ME2, the NCP160BFCS285T2G offers superior noise performance and smallest form factor - making it optimal for miniaturized RF subsystems where supply integrity directly impacts RF linearity and spectral purity.

Availability

NCP160BFCS285T2G is available at Aetrix Electronics and suitable for battery-powered equipment, wireless LAN devices, and smartphones requiring stable component supply with guaranteed long-term sourcing.

Supply support for NCP160BFCS285T2G 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 (Nasdaq: ON) is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP160 series targets RF and analog power integrity - engineered specifically for ultra-low-noise, high-PSRR regulation in mobile and wireless infrastructure where supply ripple directly degrades RF performance metrics.

FAQ

What is the output voltage tolerance of the NCP160BFCS285T2G over temperature and load?

The NCP160BFCS285T2G maintains ±2% output voltage accuracy across −40°C to +125°C junction temperature and 0–250 mA load range. This is confirmed in the Electrical Characteristics table (page 4) under "Output Voltage Accuracy" with test conditions VIN = VOUT(NOM) + 1 V and 0 mA ≤ IOUT ≤ 250 mA. The tight tolerance ensures reliable biasing of RF components without calibration overhead.

Does the NCP160BFCS285T2G include active output discharge functionality?

No, the NCP160BFCS285T2G does not include active output discharge. The 'B' suffix explicitly denotes the non-active-discharge variant. When EN is pulled low (<0.4 V), the pass transistor turns off and the output floats - no internal discharge path is activated. This behavior is documented in the Applications Information section (page 14) and distinguishes it from 'A'-suffix variants like NCP160AFCS285T2G.

What is the recommended input and output capacitor configuration for the NCP160BFCS285T2G?

The NCP160BFCS285T2G requires 1 µF X7R or X5R ceramic capacitors for both input (CIN) and output (COUT), placed as close as possible to their respective pins. The datasheet (page 14) specifies no minimum ESR requirement but recommends ceramic types for low ESL/ESR. Capacitors must be rated for ≥6.3 V DC and mounted with minimal trace length to maintain stability and transient response.

How does the thermal performance of the NCP160BFCS285T2G compare between WLCSP4 and XDFN4 packages?

The WLCSP4 package (used in NCP160BFCS285T2G) has a junction-to-ambient thermal resistance (R_JA) of 108°C/W, significantly lower than the XDFN4's 198.1°C/W (page 3). This 46% improvement enables higher power dissipation in space-constrained layouts - e.g., at 250 mA and 3.0 V input, the WLCSP4 runs ~12°C cooler than XDFN4 under identical PCB copper area (1 oz Cu, 200 mm²).

Is the NCP160BFCS285T2G pin-compatible with other variants in the NCP160 family?

Yes, all NCP160 WLCSP4 variants - including NCP160BFCS285T2G - share identical pinout (IN, OUT, EN, GND) and mechanical footprint (0.64 mm × 0.64 mm, Case 567JZ). However, electrical differences exist: 'A' vs. 'B' suffix indicates presence/absence of active discharge, and voltage codes (e.g., 'F' = 2.85 V) are laser-marked - so direct substitution requires verification of both function and output voltage.