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onsemi NCP161AFCT290T2G
- Part No.:
- NCP161AFCT290T2G
- Manufacturer:
- onsemi
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
NCP161AFCT290T2G.pdf
- Description:
- IC REG LINEAR 2.9V 450MA 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,413
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Product details
Overview
NCP161AFCT290T2G from onsemi is a 450 mA ultra-low-noise, high-PSRR LDO regulator with fixed 2.9 V output, designed for RF and analog circuits. It delivers ±2% output accuracy over load/temperature, 150 mV dropout at 450 mA, 98 dB PSRR at 1 kHz, and 10 µVRMS output noise - enabling clean power in smartphones, wireless LAN modules, and camera sensor rails.
For engineers reviewing the NCP161AFCT290T2G datasheet, pinout, applications, or equivalent options, this page provides verified package mapping (WLCSP4, 0.64 mm × 0.64 mm), validated enable logic thresholds (VENH = 1.2 V, VENL = 0.4 V), thermal shutdown behavior (160°C trip), and real-world transient response data for battery-powered RF subsystems.
Technical Context
The NCP161AFCT290T2G uses a PMOS pass transistor architecture to achieve low dropout and inherent reverse-current blocking. Its internal bandgap reference, soft-start circuitry, and active discharge (Version A) ensure stable startup and controlled output discharge during disable.
It operates across 1.9 V to 5.5 V input, supports 1 µF ceramic input/output capacitors, and maintains stability over −40°C to +125°C junction temperature. The device integrates current limiting (700 mA typ.), short-circuit protection (690 mA typ.), and thermal shutdown with hysteresis (160°C trip / 140°C release).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.9 V ±2% - ensures precise biasing for 2.8–3.0 V RF transceivers and analog front-ends without external feedback. |
| Max Output Current | 450 mA continuous - sufficient to power dual-band Wi-Fi/BT SoCs or image sensor ISPs in compact mobile designs. |
| Dropout Voltage | 170 mV at 450 mA (typ.) - enables operation from single-cell Li-ion (3.0 V min under load) with margin. |
| PSRR | 98 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters feeding noisy system rails. |
| Output Noise | 10 µVRMS (10 Hz–100 kHz) - meets stringent phase-noise requirements of RF synthesizers and ADC reference supplies. |
| Quiescent Current | 18 µA (typ.) - extends battery life in always-on sensor or modem standby modes. |
| Enable Threshold | VENH = 1.2 V, VENL = 0.4 V - compatible with standard GPIOs and enables clean sequencing with host processors. |
Pinout & Package
Package: WLCSP4 (0.64 mm × 0.64 mm × 0.33 mm), Pb-free, RoHS-compliant, bottom-side UBM (180 µm ±5 µm). Exposed pad tied to GND for thermal relief.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| A1 | IN | Input voltage supply (1.9–5.5 V); requires local 1 µF X7R/X5R ceramic decoupling. |
| A2 | OUT | Regulated 2.9 V output; must be bypassed with 1 µF ceramic capacitor placed adjacent to pin. |
| B1 | EN | Active-high enable; <0.4 V disables regulator and activates 280 Ω active discharge path to GND. |
| B2 | GND | Common ground reference; connected to PCB ground plane and exposed pad for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise | 10 µVRMS (10 Hz–100 kHz) - preserves SNR in RF receivers and high-resolution audio codecs. |
| High PSRR | 98 dB @ 1 kHz, 82 dB @ 10 kHz - rejects ripple from shared buck converters without additional filtering. |
| Active output discharge | 280 Ω pull-down when disabled - prevents floating outputs and ensures fast, controlled power-down in multi-rail systems. |
| Stable with 1 µF ceramics | No ESR requirement for COUT; supports 0201/0402 MLCCs - reduces BOM count and PCB area in space-constrained layouts. |
| Thermal protection | 160°C shutdown with 20°C hysteresis - prevents damage during sustained overload or poor heatsinking in sealed enclosures. |
Applications
| Smartphone RF Front-End | Wi-Fi 6/6E Transceiver Power |
|---|---|
|
Use Scenario: Powering PA driver stages and LNA bias rails in LTE/5G handset modules. IC Role / Device Role / Timing Role: Low-noise, high-PSRR voltage source for RF signal chain components requiring stable 2.9 V. Use Value: 10 µVRMS noise and 98 dB PSRR minimize phase noise degradation and adjacent-channel interference. |
Use Scenario: Supplying 2.9 V to dual-band Wi-Fi 6E transceivers (e.g., QCA6391, BCM43752) in tablets and hotspots. IC Role / Device Role / Timing Role: Primary LDO for RF core voltage, sequenced via host processor GPIO. Use Value: 170 mV dropout allows operation from 3.0 V system rail under peak transmit load, preserving headroom. |
| Industrial Camera Sensor Bias | Portable Medical Imaging Module |
|
Use Scenario: Providing clean 2.9 V bias to CMOS image sensor analog blocks (ADC reference, PLL, pixel array). IC Role / Device Role / Timing Role: Dedicated low-noise regulator for image sensor analog supply domain. Use Value: ±2% accuracy and <±40 mV load transient deviation ensure consistent sensor gain calibration across operating conditions. |
Use Scenario: Powering ultrasound beamformer ASICs and analog front-ends in handheld diagnostic devices. IC Role / Device Role / Timing Role: Critical 2.9 V supply for time-sensitive analog signal conditioning paths. Use Value: 18 µA quiescent current extends battery runtime during intermittent scanning, while active discharge prevents residual charge coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B292MR-G | 2.9 V fixed, 400 mA, 25 µA IQ, no active discharge, SOT-25 package (2.9 mm × 2.8 mm) | Larger footprint, higher quiescent current, lacks active discharge - suitable where board space permits and fast discharge is not required. | Select when cost sensitivity outweighs size/noise constraints and thermal performance is less critical. |
| Richtek RT9080-29GB | 2.9 V fixed, 500 mA, 20 µA IQ, 120 mV dropout, WDFN-6L (1.2 mm × 1.2 mm), no active discharge | Higher current capability but larger package than WLCSP4; no active discharge limits use in strict sequencing applications. | Choose for higher load margin in non-sequenced systems where 0.64 mm × 0.64 mm CSP is unavailable. |
Compared with Torex XC6210B292MR-G and Richtek RT9080-29GB, the NCP161AFCT290T2G offers superior noise (10 µVRMS vs. ≥15 µVRMS) and smallest footprint (0.64 mm × 0.64 mm), making it optimal for ultra-compact RF modules where spectral purity and board area are primary constraints.
Availability
NCP161AFCT290T2G is available at Aetrix Electronics and suitable for smartphone RF front-end, Wi-Fi 6E transceiver, and industrial camera sensor applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for NCP161AFCT290T2G 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 NCP161AFCT290T2G belongs to onsemi's ultra-low-noise LDO family, engineered specifically for RF and high-performance analog circuits where power integrity directly impacts signal fidelity and system-level RF metrics.
FAQ
What is the maximum input voltage rating for the NCP161AFCT290T2G?
The NCP161AFCT290T2G has an absolute maximum input voltage rating of 6 V. Operation above 5.5 V is outside the recommended operating range and may compromise reliability or parametric performance. For robust design, maintain VIN ≤ 5.5 V with appropriate derating for transient spikes.
Does the NCP161AFCT290T2G require an external resistor network for output voltage setting?
No. The NCP161AFCT290T2G is a fixed-output LDO with factory-trimmed 2.9 V regulation. It does not use external feedback resistors - eliminating layout sensitivity and ensuring ±2% accuracy over load and temperature without calibration.
Is active output discharge present in the NCP161AFCT290T2G?
Yes. The NCP161AFCT290T2G is a Version A device with active output discharge. When EN is pulled below 0.4 V, a 280 Ω internal resistor discharges the OUT pin to GND, preventing floating voltages and enabling safe multi-rail power sequencing.
Can the NCP161AFCT290T2G operate with only 1 µF ceramic capacitors on IN and OUT?
Yes. The NCP161AFCT290T2G is explicitly designed and characterized for stability with 1 µF X7R/X5R ceramic capacitors on both input and output. No minimum ESR is required, and smaller case sizes (e.g., 0201) are supported per Figure 51 in the datasheet.
What is the thermal shutdown threshold and hysteresis of the NCP161AFCT290T2G?
The NCP161AFCT290T2G triggers thermal shutdown at 160°C (typ.) and resets at 140°C (typ.), providing 20°C hysteresis. This protects against catastrophic failure during sustained overload or inadequate PCB copper area, and is fully characterized across temperature and process corners.
NCP161AFCT290T2G 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):
- 2.9V
- 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)
NCP161AFCT290T2G FAQ
1.How can I place an order for NCP161AFCT290T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP161AFCT290T2G 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 NCP161AFCT290T2G reliable?
The price and inventory of NCP161AFCT290T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP161AFCT290T2G is usually 5 days.
3.What payment methods are accepted for NCP161AFCT290T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP161AFCT290T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP161AFCT290T2G?
NCP161AFCT290T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP161AFCT290T2G 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 NCP161AFCT290T2G?
For technical support, including NCP161AFCT290T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP161AFCT290T2G requirements.
6.How does Aetrix verify that NCP161AFCT290T2G is sourced from the original manufacturer or authorized distributors?
All NCP161AFCT290T2G 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 NCP161AFCT290T2G meets industry standards.
7.What is the process for return or replacement of NCP161AFCT290T2G?
All NCP161AFCT290T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP161AFCT290T2G, 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 NCP161AFCT290T2G part is unused and in its original packaging.
Return procedure for NCP161AFCT290T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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