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onsemi NCP161BFCT330T2G
- Part No.:
- NCP161BFCT330T2G
- Manufacturer:
- onsemi
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
NCP161BFCT330T2G.pdf
- Description:
- IC REG LINEAR 3.3V 450MA 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,790
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Product details
Overview
NCP161BFCT330T2G from onsemi is a 450 mA ultra-low-noise, high-PSRR LDO regulator with fixed 3.3 V output, ±2% accuracy over load/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 NCP161BFCT330T2G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, package mapping to XDFN4 (1 mm × 1 mm), thermal performance data, EN-controlled enable/disable behavior, and real-world transient response metrics critical for battery-powered RF subsystems.
Technical Context
The NCP161BFCT330T2G employs a PMOS pass transistor architecture enabling low dropout and inherent reverse-current protection. Its bandgap reference and integrated soft-start ensure stable startup with 120 µs typical turn-on time into 1 µF ceramic output capacitance.
It features active discharge only in Version A variants; NCP161BFCT330T2G is Version B (non-active discharge), confirmed by 'BF' prefix and ordering table. PSRR reaches 98 dB at 1 kHz (20 mA load), and noise is specified at 10 µVRMS (10 Hz–100 kHz, IOUT = 250 mA), validated across −40°C to +125°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2% - ensures precise biasing for 3.3 V logic, RF transceivers, and analog sensors without external feedback. |
| Max Output Current | 450 mA continuous - supports moderate-power RF front-ends and multi-rail analog signal chains. |
| Dropout Voltage | 160 mV typical at 450 mA - enables operation from 3.46 V input (e.g., single Li-ion cell post-regulation) while maintaining regulation. |
| PSRR | 98 dB @ 1 kHz, 82 dB @ 10 kHz - suppresses switching noise from adjacent DC-DC converters in mixed-signal PCBs. |
| Output Noise | 10 µVRMS (10 Hz–100 kHz, 250 mA load) - meets stringent phase-noise requirements for VCOs and LNAs. |
| Quiescent Current | 18 µA typical - extends battery life in always-on sensor nodes and standby RF receivers. |
| Enable Threshold | VENH = 1.2 V, VENL = 0.4 V - compatible with standard GPIOs and open-drain controllers without level-shifting. |
Pinout & Package
XDFN4 package (Case 711AJ): 1 mm × 1 mm × 0.4 mm, wettable flank, exposed thermal pad (EPAD) tied to GND for enhanced thermal dissipation (RJA = 198.1°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 1.9–5.5 V; requires ≥1 µF ceramic capacitor close to pin for stability and transient response. |
| 2 (GND) | Ground reference | Common return path; EPAD must be soldered to PCB ground plane to meet thermal spec and EMI performance. |
| 3 (EN) | Enable control input | Logic-high (>1.2 V) enables regulation; logic-low (<0.4 V) disables output and reduces IQ to 0.01 µA (typ). |
| 4 (OUT) | Regulated output | Delivers stable 3.3 V; bypassed with 1 µF ceramic capacitor; no minimum ESR required but ≤2 Ω recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise | 10 µVRMS (10 Hz–100 kHz) - preserves SNR in ADC drivers and RF receiver IF stages. |
| High PSRR | 98 dB @ 1 kHz - rejects ripple from shared power rails without additional filtering. |
| Low dropout | 160 mV @ 450 mA - maximizes usable battery voltage range in 3.3 V systems. |
| Thermal shutdown | 160°C trip / 140°C reset - protects against sustained overload or poor heatsinking without latch-up. |
| Stable with 1 µF ceramics | No ESR requirement - simplifies BOM and layout; eliminates need for tantalum or polymer capacitors. |
Applications
| Wireless LAN Front-End | Smartphone RF Power Amplifier Bias |
|---|---|
|
Use Scenario: Powering 2.4/5 GHz WLAN transceiver ICs requiring clean 3.3 V supply under dynamic TX/RX load transitions. IC Role / Device Role / Timing Role: Low-noise LDO providing regulated bias to PA driver stages and RF switches. Use Value: 98 dB PSRR prevents DC-DC switching noise from modulating RF carrier; 4 µs load transient recovery minimizes TX burst distortion. |
Use Scenario: Supplying 3.3 V bias to LTE/5G power amplifier modules during high-duty-cycle uplink bursts. IC Role / Device Role / Timing Role: Primary analog rail regulator with fast line/load transient response to maintain PA gain flatness. Use Value: 160 mV dropout enables operation from partially discharged battery (≥3.46 V); 10 µVRMS noise avoids AM-to-PM conversion in PA output stage. |
| Industrial IoT Sensor Node | Medical Wearable Analog Front-End |
|
Use Scenario: Powering ultra-low-power MCU + RF SoC + precision analog sensor (e.g., MEMS accelerometer) from coin-cell or small Li-Po. IC Role / Device Role / Timing Role: System-level LDO delivering 3.3 V to mixed-signal SoC and sensor interface circuitry. Use Value: 18 µA quiescent current extends shelf life; ±2% accuracy ensures consistent ADC reference scaling across temperature. |
Use Scenario: Regulating 3.3 V for EEG/ECG analog front-end ASICs where EMI and noise directly impact diagnostic signal fidelity. IC Role / Device Role / Timing Role: Critical analog supply rail for instrumentation amplifiers and sigma-delta ADCs. Use Value: 10 µVRMS noise floor enables sub-µV bio-potential resolution; thermal shutdown prevents patient-contact overheating risks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B332MR-G | 300 mA max output, 250 mV dropout at 300 mA, 25 µVRMS noise, SOT-25 package | Limited current headroom for RF PAs; higher noise degrades SNR in sensitive receivers | Select when cost sensitivity outweighs RF performance; verify thermal margin at 450 mA. |
| Richtek RT9080A-33PU5 | 500 mA output, 200 mV dropout at 500 mA, 20 µVRMS noise, XDFN-4 same footprint | Higher noise and slightly larger dropout reduce margin in low-VIN battery scenarios | Use if higher current capability is needed and 20 µVRMS noise is acceptable for target application. |
Compared with Torex XC6210B332MR-G and Richtek RT9080A-33PU5, NCP161BFCT330T2G delivers superior noise performance (10 vs. 20–25 µVRMS) and tighter dropout (160 mV vs. 200–250 mV) at full 450 mA load - making it optimal for RF-critical, battery-constrained designs where signal integrity and voltage headroom are non-negotiable.
Availability
NCP161BFCT330T2G is available at Aetrix Electronics and suitable for wireless LAN front-ends, smartphone RF power amplifier biasing, and industrial IoT sensor nodes requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for NCP161BFCT330T2G 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-performance analog circuits - prioritizing ultra-low noise, high PSRR, and minimal dropout to preserve signal integrity in noise-sensitive wireless and sensing systems.
FAQ
What is the maximum input voltage rating for NCP161BFCT330T2G?
The absolute maximum input voltage for NCP161BFCT330T2G is 6 V, per the Absolute Maximum Ratings table. Continuous operation above 5.5 V is not recommended, as the device is specified for 1.9–5.5 V input range. Exceeding 6 V may cause permanent damage, and operation near the limit requires careful thermal design due to increased power dissipation in the PMOS pass element.
Does NCP161BFCT330T2G include active output discharge?
No, NCP161BFCT330T2G does not include active output discharge. The 'B' in the part number denotes Version B (non-active discharge), confirmed in the Ordering Information table and Electrical Characteristics footnote. When disabled via the EN pin, the output floats; an external pull-down resistor is required if rapid discharge is needed.
What is the thermal resistance (RJA) of NCP161BFCT330T2G in its XDFN4 package?
The junction-to-ambient thermal resistance (RJA) for NCP161BFCT330T2G in the XDFN4 package is 198.1°C/W, measured per JEDEC JESD51-7 on a standard test board. This value assumes proper PCB layout with the EPAD soldered to a thermal pad connected to ≥1 cm² of 1 oz copper. Actual RJA improves with larger copper area or 2 oz copper layers.
Can NCP161BFCT330T2G operate stably with a 0.7 µF output capacitor?
Yes, NCP161BFCT330T2G is designed to remain stable with a minimum effective output capacitance of 0.7 µF, accounting for capacitance loss due to DC bias, temperature, and package size (e.g., 0201 MLCCs). However, the recommended value is 1 µF X7R/X5R ceramic for guaranteed performance across all conditions including load transients and PSRR.
What is the typical enable turn-on time for NCP161BFCT330T2G?
The typical enable turn-on time for NCP161BFCT330T2G is 120 µs - defined as the time from EN rising to 95% of nominal 3.3 V output, measured with COUT = 1 µF. This parameter is load- and temperature-dependent; actual timing ranges from ~100 µs (light load, 25°C) to ~150 µs (450 mA, 125°C), as shown in Figure 37 and Figure 38 of the datasheet.
NCP161BFCT330T2G 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):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.26V @ 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)
NCP161BFCT330T2G FAQ
1.How can I place an order for NCP161BFCT330T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP161BFCT330T2G 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 NCP161BFCT330T2G reliable?
The price and inventory of NCP161BFCT330T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP161BFCT330T2G is usually 5 days.
3.What payment methods are accepted for NCP161BFCT330T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP161BFCT330T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP161BFCT330T2G?
NCP161BFCT330T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP161BFCT330T2G 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 NCP161BFCT330T2G?
For technical support, including NCP161BFCT330T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP161BFCT330T2G requirements.
6.How does Aetrix verify that NCP161BFCT330T2G is sourced from the original manufacturer or authorized distributors?
All NCP161BFCT330T2G 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 NCP161BFCT330T2G meets industry standards.
7.What is the process for return or replacement of NCP161BFCT330T2G?
All NCP161BFCT330T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP161BFCT330T2G, 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 NCP161BFCT330T2G part is unused and in its original packaging.
Return procedure for NCP161BFCT330T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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