onsemi NCP160AFCS370T2G

Overview

NCP160AFCS370T2G from onsemi is a 250 mA ultra-low-noise, high-PSRR LDO regulator with fixed 3.7 V output, designed for RF and analog circuits in space-constrained portable devices. It delivers ±2% output accuracy over load/temperature, 80 mV dropout at 250 mA, 98 dB PSRR at 1 kHz, and 10 µV_RMS output noise (10 Hz–100 kHz), enabling clean power for LTE/Wi-Fi front-ends and precision ADCs.

For engineers reviewing the NCP160AFCS370T2G datasheet, pinout, applications, or equivalent options, key selection criteria include its WLCSP4 0.64 mm × 0.64 mm × 0.33 mm package, active discharge capability, 18 µA quiescent current, and compatibility with 1 µF ceramic input/output capacitors - critical for battery-powered smartphone camera modules and wireless sensor nodes.

Technical Context

The NCP160AFCS370T2G integrates a PMOS pass transistor with thermal shutdown (160°C trip), output current limiting (700 mA typ.), and an enable-controlled active discharge path (280 Ω). Its bandgap reference and soft-start circuit ensure stable startup under light-to-heavy load transitions without output overshoot.

It operates across 1.9 V to 5.5 V input voltage and maintains regulation down to 80 mV dropout at full 250 mA load for the 3.7 V variant. The device is optimized for low-ESR ceramic capacitors and exhibits <±1 mV line transient response and ±40 mV load transient response (1 mA ↔ 200 mA, 10 µs edge).

Key Specifications

Pinout & Package

Package: WLCSP4 (Case 567JZ), 0.64 mm × 0.64 mm × 0.33 mm, Pb-free, RoHS-compliant. Exposed pad (EPAD) tied to GND for thermal relief.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B372MR-G and RT9080AL-37PUF, the NCP160AFCS370T2G uniquely combines 0.64 mm CSP size, 250 mA capability, active discharge, and 10 µV_RMS noise - making it the only option meeting all four requirements for next-gen ultra-thin mobile RF subsystems.

Availability

NCP160AFCS370T2G is available at Aetrix Electronics and suitable for smartphone camera modules, Wi-Fi 6 front-end power, and portable medical sensor hubs requiring stable component supply with guaranteed long-term sourcing.

Supply support for NCP160AFCS370T2G 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT markets.

The NCP160 series is part of onsemi's precision analog portfolio, engineered specifically for noise-sensitive RF and mixed-signal applications where PSRR, dropout, and quiescent current directly impact system-level RF performance and battery longevity.

FAQ

What is the output voltage tolerance of the NCP160AFCS370T2G over temperature and load?

The NCP160AFCS370T2G guarantees ±2% output voltage accuracy across −40°C to +125°C junction temperature and 0 mA to 250 mA load current. This is confirmed in the Electrical Characteristics table (page 4 of the datasheet) under "Output Voltage Accuracy" with test conditions VIN = VOUT(NOM) + 1 V and TJ = −40°C to +125°C. The tight tolerance ensures reliable biasing of RF components without calibration overhead.

Does the NCP160AFCS370T2G support active output discharge, and how does it function?

Yes, the NCP160AFCS370T2G includes active output discharge. When the EN pin voltage falls below 0.4 V, the internal 280 Ω discharge resistor connects OUT to GND, rapidly discharging external output capacitance. This feature is explicitly documented in the Pin Function Description (page 2) and Applications Information (page 14), and is confirmed for "Version A" devices like NCP160AFCS370T2G.

What is the minimum recommended output capacitor for stable operation of the NCP160AFCS370T2G?

The NCP160AFCS370T2G is designed to remain stable with a minimum effective output capacitance of 0.7 µF (X7R/X5R ceramic), though 1 µF is recommended for optimal transient response and PSRR. This is specified in the Applications Information section (page 14) and validated in Figure 37 (Stability vs. ESR). Capacitor size must account for DC bias derating - e.g., 0201 1 µF parts may drop below 0.7 µF at 3.7 V.

Can the NCP160AFCS370T2G operate from a 3.4 V input while delivering 250 mA at 3.7 V output?

No - the NCP160AFCS370T2G cannot regulate at 3.7 V output with only 3.4 V input. Its minimum dropout is 85 mV at 250 mA (page 4, Dropout Voltage table), requiring VIN ≥ 3.785 V. Operation below this violates the absolute minimum input voltage condition and will cause output collapse. For 3.4 V input, a lower-output variant (e.g., NCP160AFCS350T2G, 3.5 V) is required.

Is the NCP160AFCS370T2G pin-compatible with other variants in the NCP160 family?

Yes - all WLCSP4-packaged NCP160 variants (e.g., NCP160AFCS330T2G, NCP160AFCS514T2G) share identical pinout (IN, OUT, EN, GND) and mechanical footprint per Case 567JZ (page 17). This allows voltage-scaling flexibility in layout without redesign. However, electrical behavior (e.g., active discharge presence, current limit) varies by suffix - NCP160AFCSxxxT2G parts all include active discharge, unlike NCP160BFCSxxxT2G.