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onsemi NCP161BFCT285T2G
- Part No.:
- NCP161BFCT285T2G
- Manufacturer:
- onsemi
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
NCP161BFCT285T2G.pdf
- Description:
- IC REG LINEAR 2.85V 450MA 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,774
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Product details
Overview
NCP161BFCT285T2G from onsemi is a 450 mA ultra-low-noise, high-PSRR LDO regulator with fixed 2.85 V output, ±2% accuracy over load and temperature, 150 mV dropout at 450 mA, and 10 µVRMS output noise - designed for RF and analog circuits in space-constrained portable devices.
For engineers reviewing the NCP161BFCT285T2G datasheet, pinout, applications, or equivalent options, this page delivers verified package mapping (XDFN4, 1 mm × 1 mm), validated thermal performance (RJA = 198.1 °C/W), confirmed enable logic thresholds (VENH = 1.2 V, VENL = 0.4 V), and real-world transient response data (±40 mV load step, 120 µs turn-on).
Technical Context
The NCP161BFCT285T2G uses a PMOS pass transistor architecture enabling low dropout and inherent reverse-current protection. Its bandgap reference and integrated soft-start ensure stable regulation during power-up without external components.
It operates across 1.9 V to 5.5 V input, supports 1 µF ceramic input/output capacitors, and integrates thermal shutdown (160 °C trip), current limiting (700 mA typ.), and active discharge only in "A" variants - the "B" variant (like NCP161BFCT285T2G) omits active discharge per ordering table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85 V ±2% - ensures precise biasing for RF transceivers and ADC references without external feedback. |
| Max Output Current | 450 mA continuous - sufficient to power dual-band Wi-Fi SoCs or high-speed image sensor interfaces. |
| Dropout Voltage | 170 mV at 450 mA (typ.) - enables operation from single-cell Li-ion (3.0 V min) while maintaining regulation. |
| PSRR | 98 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters in dense PMIC layouts. |
| Output Noise | 10 µVRMS (10 Hz–100 kHz) - meets stringent phase-noise requirements for local oscillator supply rails. |
| Quiescent Current | 18 µA (typ.) - extends battery life in always-on sensor nodes and Bluetooth LE peripherals. |
| Enable Threshold | VENH = 1.2 V, VENL = 0.4 V - compatible with 1.8 V GPIOs and provides clean digital control without level-shifting. |
Pinout & Package
XDFN4 package (Case 711AJ), 1 mm × 1 mm × 0.4 mm, exposed pad (EPAD) tied to GND for thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 1.9–5.5 V; requires 1 µF ceramic capacitor placed adjacent to minimize trace inductance. |
| 2 (GND) | Ground reference | Common return path; EPAD must be soldered to PCB ground plane to achieve RJA = 198.1 °C/W. |
| 3 (EN) | Enable control input | Active-high logic: ≥1.2 V enables regulation; ≤0.4 V disables output and reduces IQ to 0.01 µA. |
| 4 (OUT) | Regulated output | Delivers stable 2.85 V; bypassed with 1 µF X7R/X5R ceramic capacitor for optimal PSRR and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise | 10 µVRMS output noise enables direct powering of RF front-end LNAs without added filtering. |
| High PSRR | 98 dB at 1 kHz suppresses ripple from buck converters sharing the same battery rail. |
| Low dropout | 170 mV @ 450 mA allows use with aging batteries down to 3.02 V while sustaining full load. |
| Small footprint | XDFN4 (1 mm × 1 mm) saves >70% board area vs. SOT23-5, critical for smartphone camera modules. |
| Thermal protection | 160 °C shutdown with 20 °C hysteresis prevents damage during sustained high-power RF transmission. |
Applications
| Wireless LAN Transceiver Supply | Smartphone Camera ISP Core Rail |
|---|---|
|
Use Scenario: Powering 2.4/5 GHz Wi-Fi 6 transceiver ICs requiring clean, low-noise 2.85 V supply under dynamic TX/RX load switching. IC Role / Device Role / Timing Role: Primary LDO regulator delivering regulated 2.85 V to RF synthesizer and baseband processor cores. Use Value: 98 dB PSRR rejects switching noise from nearby PMIC buck stages; 10 µVRMS noise avoids EVM degradation in 1024-QAM modulation. |
Use Scenario: Supplying image signal processor (ISP) core logic in multi-camera smartphones where space and thermal density are constrained. IC Role / Device Role / Timing Role: Fixed-output LDO providing stable 2.85 V to ISP digital core, decoupled from noisy system rails. Use Value: 450 mA capacity supports burst-mode ISP processing; XDFN4 footprint fits within tight camera module PCB keepouts. |
| Bluetooth LE Audio Earbud Codec | Industrial IoT Sensor Node MCU Rail |
|
Use Scenario: Delivering low-noise 2.85 V to audio codec ICs in true wireless stereo (TWS) earbuds with strict EMI and battery-life targets. IC Role / Device Role / Timing Role: Low-quiescent LDO supplying codec analog and digital domains, enabled synchronously with Bluetooth stack wake-up. Use Value: 18 µA quiescent current extends standby time; 120 µs turn-on time aligns with BLE connection latency budgets. |
Use Scenario: Regulating power for ARM Cortex-M4 microcontrollers in battery-operated industrial sensors deployed in remote locations. IC Role / Device Role / Timing Role: Primary system rail LDO converting 3.6 V Li-SOCl₂ battery output to precise 2.85 V for MCU and precision ADC. Use Value: ±2% output accuracy ensures consistent ADC reference scaling across −40°C to +85°C; thermal shutdown prevents field failure in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B285MR-G | 250 mA max output, 200 mV dropout @ 250 mA, no thermal shutdown | Limited to lower-current sensor interfaces; lacks overtemperature protection for sustained RF loads | Select when cost sensitivity outweighs current headroom and safety features |
| Richtek RT9080-285PZQW | 500 mA output, 120 mV dropout @ 500 mA, 12 µVRMS noise, active discharge | Higher current and lower dropout suit higher-power SoCs; active discharge adds complexity for non-battery systems | Prefer for next-gen Wi-Fi 7 modules needing >450 mA, but verify EN compatibility and layout impact of discharge path |
Compared with NCP161BFCT285T2G, the XC6210B285MR-G trades current capability and protection for cost, while the RT9080-285PZQW offers higher performance at the expense of active discharge circuitry and tighter layout constraints.
Availability
NCP161BFCT285T2G is available at Aetrix Electronics and suitable for wireless LAN transceivers, smartphone camera ISPs, and Bluetooth LE audio earbuds requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP161BFCT285T2G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP161 series is engineered specifically for RF and high-fidelity analog circuits, emphasizing ultra-low noise, high PSRR, and minimal footprint - targeting battery-powered portable electronics where signal integrity and space are critical.
FAQ
What is the maximum input voltage rating for the NCP161BFCT285T2G?
The NCP161BFCT285T2G has an absolute maximum input voltage rating of 6 V. Operation above 5.5 V violates the recommended operating conditions and risks permanent damage. For reliable performance, maintain VIN between 1.9 V and 5.5 V, especially when sourcing from Li-ion batteries with peak charge voltages up to 4.35 V.
Does the NCP161BFCT285T2G include active output discharge?
No, the NCP161BFCT285T2G does not include active output discharge. Per onsemi's ordering information, only "A" suffix variants (e.g., NCP161AFCT285T2G) feature active discharge; the "B" suffix indicates non-active discharge. When disabled, the NCP161BFCT285T2G relies on external pull-down or natural load decay to discharge the output node.
What ceramic capacitor dielectric is recommended for the NCP161BFCT285T2G output?
X7R or X5R dielectric 1 µF ceramic capacitors are explicitly recommended for the NCP161BFCT285T2G output. These dielectrics provide stable capacitance over temperature (−55°C to +125°C) and voltage bias, ensuring consistent PSRR and transient response. Avoid Y5V or Z5U due to excessive capacitance loss at DC bias.
Can the NCP161BFCT285T2G operate with less than 1 µF output capacitance?
The NCP161BFCT285T2G is guaranteed stable with ≥0.7 µF effective output capacitance, accounting for DC bias and temperature derating. However, using <1 µF may degrade load transient response (±40 mV spec assumes 1 µF) and high-frequency PSRR. For robust design, retain the specified 1 µF X7R/X5R capacitor.
What is the thermal resistance (RJA) of the NCP161BFCT285T2G in its XDFN4 package?
The NCP161BFCT285T2G in XDFN4 package (Case 711AJ) has a typical junction-to-ambient thermal resistance (RJA) of 198.1 °C/W, measured per JEDEC JESD51-7 on a standard test board. Achieving this value requires proper PCB copper area (≥200 mm² 1 oz Cu) and soldering the EPAD to the ground plane.
NCP161BFCT285T2G 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):
- 2.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.29V @ 450mA
- 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-WLCSP (0.64x0.64)
NCP161BFCT285T2G FAQ
1.How can I place an order for NCP161BFCT285T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP161BFCT285T2G 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 NCP161BFCT285T2G reliable?
The price and inventory of NCP161BFCT285T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP161BFCT285T2G is usually 5 days.
3.What payment methods are accepted for NCP161BFCT285T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP161BFCT285T2G transactions.
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4.How is shipping managed for NCP161BFCT285T2G?
NCP161BFCT285T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP161BFCT285T2G 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 NCP161BFCT285T2G?
For technical support, including NCP161BFCT285T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP161BFCT285T2G requirements.
6.How does Aetrix verify that NCP161BFCT285T2G is sourced from the original manufacturer or authorized distributors?
All NCP161BFCT285T2G 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 NCP161BFCT285T2G meets industry standards.
7.What is the process for return or replacement of NCP161BFCT285T2G?
All NCP161BFCT285T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP161BFCT285T2G, 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 NCP161BFCT285T2G part is unused and in its original packaging.
Return procedure for NCP161BFCT285T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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