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NCP161AFCT180T2G

ONNCP161AFCT180T2G

onsemi
Linear Voltage Regulator IC Positive Fixed 1 Output 450mA 4-WLCSP (0.64x0.64)
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Overview

The NCP161AFCT180T2G is a high-performance linear voltage regulator capable of delivering 450mA of output current with an extremely high Power Supply Rejection Ratio (PSRR) of 91dB. Designed for noise-sensitive RF and analog circuits, this 1.8V fixed-output LDO features ultra-low quiescent current and is housed in a tiny 4-bump WLCSP package to minimize PCB footprint.

Why Choose This Part

This regulator offers a class-leading PSRR of 91dB at 100Hz and remains effective up to 100kHz, ensuring superior ripple rejection. Its ultra-small 0.64mm x 0.64mm WLCSP footprint and 18uA quiescent current make it ideal for battery-operated devices where space and power efficiency are paramount.

Applications

RF Front-End Power
Provides clean power to LNAs and mixers where high PSRR and low noise are critical for signal integrity.
Mobile Imaging
Powers CMOS image sensors while filtering out high-frequency switching noise from upstream DC-DC converters.
Wireless Connectivity Modules
Supplies stable voltage to Wi-Fi, Bluetooth, and Zigbee SoCs in space-constrained IoT designs.
Precision Analog Circuitry
Serves as a clean reference or supply for high-resolution ADCs and DACs requiring low noise floor (10uVrms).

Key Specifications

PSRR 91dB ~ 48dB (100Hz ~ 100kHz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case 4-XFBGA, WLCSP
Control Features Enable
Current - Output 450mA
Protection Features Over Current, Over Temperature, Soft Start
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 5.5V
Voltage Dropout (Max) 0.45V @ 450mA
Supplier Device Package 4-WLCSP (0.64x0.64)
Current - Quiescent (Iq) 23 uA
Voltage - Output (Min/Fixed) 1.8V

Getting Started

To implement this LDO, place 1uF ceramic capacitors as close as possible to the IN and OUT pins for stability. The active discharge feature ensures the output capacitor is quickly drained when the EN pin is pulled low, providing a controlled shutdown sequence.

Also Consider

TPS7A2018PDBVR TITexas Instruments - Offers similar low-noise performance and high PSRR in a SOT-23 package for designs requiring easier hand-soldering.