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onsemi NCP161AFCT310T2G
- Part No.:
- NCP161AFCT310T2G
- Manufacturer:
- onsemi
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
NCP161AFCT310T2G.pdf
- Description:
- IC REG LINEAR 3.1V 450MA 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,764
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Product details
Overview
NCP161AFCT310T2G from onsemi is a 450 mA ultra-low-noise, high-PSRR LDO regulator with fixed 3.1 V output, designed for RF and analog circuits. It delivers ±2% output accuracy over load/temperature, 150 mV dropout at 450 mA, 10 µVRMS output noise, and 98 dB PSRR at 1 kHz - enabling clean power in smartphones, wireless LAN modules, and camera sensor rails.
For engineers reviewing the NCP161AFCT310T2G datasheet, pinout, applications, or equivalent options, key selection criteria include its active discharge capability, WLCSP4 0.64 mm × 0.64 mm package, 18 µA quiescent current, and compatibility with 1 µF ceramic input/output capacitors without ESR requirements.
Technical Context
The NCP161AFCT310T2G uses a PMOS pass transistor architecture to achieve low dropout and reverse-current protection via an integrated body diode. Its bandgap reference and integrated soft-start ensure stable startup under varying load conditions.
It implements active output discharge (280 Ω pull-down) when disabled via the EN pin (threshold: 0.4 V low / 1.2 V high), and includes thermal shutdown (160°C trip, 140°C reset) and current limiting (700 mA typ.) for robust system-level protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.1 V ±2% over load/temperature - ensures stable biasing for 3.1 V–rated RF front-end ICs and analog sensors. |
| Max Output Current | 450 mA continuous - supports moderate-power RF transceivers and multi-rail analog subsystems. |
| Dropout Voltage | 150 mV at 450 mA - enables operation from 3.25 V input (e.g., single Li-ion cell post-regulation) while maintaining regulation. |
| PSRR | 98 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters feeding shared input rails. |
| Output Noise | 10 µVRMS (10 Hz–100 kHz) - meets stringent phase-noise requirements in VCO and LNA power domains. |
| Quiescent Current | 18 µA typ. - extends battery life in always-on sensor and IoT wake-up circuits. |
| Enable Threshold | VENH = 1.2 V, VENL = 0.4 V - compatible with standard GPIO logic levels for host-controlled power sequencing. |
Pinout & Package
Package: WLCSP4 (0.64 mm × 0.64 mm × 0.33 mm), Pb-free, RoHS-compliant, with exposed pad tied to GND for thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 1.9–5.5 V; requires 1 µF ceramic capacitor close to pin for stability and transient response. |
| OUT | Regulated output | Delivers fixed 3.1 V; must be bypassed with 1 µF ceramic capacitor; supports ≤2 Ω ESR. |
| EN | Enable control input | Active-high logic; <0.4 V disables regulator and activates 280 Ω active discharge; >1.2 V enables regulation. |
| GND | Ground reference | Common return path; exposed pad must be connected to PCB ground plane for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise | 10 µVRMS output noise enables use in sensitive RF receiver chains without additional filtering. |
| High PSRR | 98 dB at 1 kHz rejects ripple from noisy switchers, reducing need for cascaded filtering stages. |
| Active output discharge | 280 Ω internal pull-down discharges OUT rapidly on disable - prevents floating outputs in power-sequenced systems. |
| Low quiescent current | 18 µA IQ allows integration into battery-backed real-time clock or always-on sensor nodes with multi-year runtime. |
| Stable with 1 µF ceramics | No ESR requirement simplifies BOM and layout - eliminates need for tantalum or polymer capacitors. |
Applications
| Smartphone RF Front-End | Wireless LAN Transceiver |
|---|---|
Use Scenario: Powering 3.1 V LNA and PA driver stages in LTE/5G handset front-end modules. IC Role / Device Role / Timing Role: Low-noise local LDO supplying clean bias to RF amplifiers, rejecting baseband switching noise. Use Value: 10 µVRMS noise and 98 dB PSRR prevent reciprocal mixing and maintain EVM <2.5% at 2.6 GHz. | Use Scenario: Regulating power for 802.11ac/ax Wi-Fi SoC analog PHY blocks and crystal oscillator buffers. IC Role / Device Role / Timing Role: Dedicated 3.1 V rail isolating sensitive timing circuitry from digital core noise. Use Value: Active discharge ensures fast power-down of oscillator circuitry during sleep mode transitions. |
| Industrial Camera Sensor Rail | Medical Ultrasound Analog Front-End |
Use Scenario: Supplying image sensor analog core (ADC bias, PLL VCO, column drivers) in compact IP cameras. IC Role / Device Role / Timing Role: Precision LDO delivering stable 3.1 V with minimal thermal drift across −40°C to +85°C ambient. Use Value: ±2% accuracy and 0.001 %/mA load regulation preserve ADC reference integrity and SNR >72 dB. | Use Scenario: Biasing ultrasound receive-path amplifiers and variable-gain amplifiers requiring ultra-low-noise supply. IC Role / Device Role / Timing Role: Ultra-low-noise LDO replacing discrete RC filters in critical analog signal chain paths. Use Value: 10 µVRMS noise directly translates to ≥105 dB dynamic range in 12-bit medical-grade ADCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B312MR-G | 3.1 V fixed, 300 mA, 25 µA IQ, no active discharge, SOT-25 package (2.9 × 2.8 mm) | Larger footprint, lower current rating, no output discharge - unsuitable for fast power-down sequencing. | Select when board space permits larger package and active discharge is not required. |
| Richtek RT9080-31PU5 | 3.1 V fixed, 500 mA, 22 µA IQ, 200 mV dropout @ 500 mA, WDFN-6 package (1.2 × 1.2 mm) | Higher current, slightly higher dropout, different pinout (6-pin), no active discharge. | Choose for higher load margin but accept trade-off in missing active discharge and larger package than WLCSP4. |
Compared with Torex XC6210B312MR-G and Richtek RT9080-31PU5, the NCP161AFCT310T2G offers superior noise performance (10 µVRMS vs. ≥15 µVRMS), smaller WLCSP4 footprint (0.64 mm² vs. ≥8.1 mm²), and integrated active discharge - critical for low-latency power cycling in portable RF systems.
Availability
NCP161AFCT310T2G is available at Aetrix Electronics and suitable for smartphone RF front-end modules, wireless LAN transceivers, and industrial camera sensor rails requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for NCP161AFCT310T2G 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 NCP161 product line targets ultra-low-noise, high-PSRR power regulation for RF and precision analog circuits - specifically engineered to replace legacy LDOs in noise-sensitive wireless and imaging systems.
FAQ
What is the output voltage tolerance of the NCP161AFCT310T2G over temperature and load?
The NCP161AFCT310T2G maintains ±2% output voltage accuracy across −40°C to +125°C junction temperature and 0–450 mA load range, as specified in the Electrical Characteristics table under "Output Voltage Accuracy" with VIN = VOUT(NOM) + 1 V. This tolerance ensures reliable operation for 3.1 V–rated RF ICs without external trimming.
Does the NCP161AFCT310T2G require an external resistor for enable functionality?
No, the NCP161AFCT310T2G does not require an external resistor for enable functionality. Its EN pin has an internal pull-down current source (200 nA typ.), allowing direct connection to IN for always-on operation or to a GPIO for controlled sequencing. The EN threshold is guaranteed at 0.4 V (low) and 1.2 V (high).
Can the NCP161AFCT310T2G be used with 0201-size 1 µF ceramic capacitors?
Yes, the NCP161AFCT310T2G is explicitly designed to remain stable with 1 µF X7R/X5R ceramic capacitors, including 0201 case sizes. The datasheet confirms stability down to 0.7 µF effective capacitance, accounting for DC bias derating - making it compatible with space-constrained mobile designs using 0201 MLCCs.
What thermal performance can be expected from the NCP161AFCT310T2G in a typical 2-layer PCB layout?
In a standard 2-layer PCB with 1 oz copper and 100 mm² ground pad area, the NCP161AFCT310T2G (WLCSP4) achieves ~108°C/W junction-to-ambient thermal resistance. At 450 mA load with 3.25 V input, power dissipation is ~67.5 mW, resulting in ~7.3°C junction rise above ambient - well within safe operating limits without heatsinking.
Is active output discharge present in all variants of the NCP161AFCT310T2G?
Yes, active output discharge is a defined feature of the "A" version prefix (NCP161A), including the NCP161AFCT310T2G. It provides a 280 Ω internal discharge path from OUT to GND when EN < 0.4 V, ensuring rapid voltage decay - a capability absent in "B"-series variants like NCP161BFCT310T2G.
NCP161AFCT310T2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 4-XFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 450mA
- Current - Quiescent (Iq):
- 23 µA
- Current - Supply (Max):
- -
- PSRR:
- 91dB ~ 48dB (100Hz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Soft Start
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-WLCSP (0.64x0.64)
NCP161AFCT310T2G FAQ
1.How can I place an order for NCP161AFCT310T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP161AFCT310T2G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for NCP161AFCT310T2G reliable?
The price and inventory of NCP161AFCT310T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP161AFCT310T2G is usually 5 days.
3.What payment methods are accepted for NCP161AFCT310T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP161AFCT310T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP161AFCT310T2G?
NCP161AFCT310T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP161AFCT310T2G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for NCP161AFCT310T2G?
For technical support, including NCP161AFCT310T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP161AFCT310T2G requirements.
6.How does Aetrix verify that NCP161AFCT310T2G is sourced from the original manufacturer or authorized distributors?
All NCP161AFCT310T2G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that NCP161AFCT310T2G meets industry standards.
7.What is the process for return or replacement of NCP161AFCT310T2G?
All NCP161AFCT310T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP161AFCT310T2G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The NCP161AFCT310T2G part is unused and in its original packaging.
Return procedure for NCP161AFCT310T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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