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onsemi NCP161BMX300TBG
- Part No.:
- NCP161BMX300TBG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP161BMX300TBG.pdf
- Description:
- IC REG LINEAR 3V 450MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,169
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Product details
Overview
NCP161BMX300TBG from onsemi is a 450 mA ultra-low-noise, high-PSRR LDO regulator with 3.0 V fixed output, 150 mV dropout at full load, ±2% output accuracy over load/temperature, and 10 µVRMS integrated noise (10 Hz–100 kHz). Designed for RF and analog power rails in smartphones and wireless LAN modules, it operates from 1.9 V to 5.5 V input and supports stable regulation with only 1 µF ceramic input/output capacitors.
For engineers reviewing the NCP161BMX300TBG 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 time).
Technical Context
The NCP161BMX300TBG uses a PMOS pass transistor architecture enabling low dropout and inherent reverse-current blocking. Its bandgap reference and integrated soft-start ensure monotonic startup without output overshoot, while thermal shutdown (160°C trip, 140°C reset) and current limiting (700 mA typ.) provide robust fault protection.
Unlike active-discharge variants (e.g., NCP161A-series), the "B" suffix denotes absence of internal discharge FET - output voltage decays only through external load or parasitic paths. This simplifies bias sequencing in systems where uncontrolled discharge could disrupt downstream circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±2% over −40°C to +125°C and full 0–450 mA load range - eliminates need for external feedback resistors and ensures consistent rail stability across temperature and load. |
| Dropout Voltage | 165 mV max at 450 mA - enables operation from 3.165 V input when powering 3.0 V circuits, maximizing battery runtime in single-cell Li-ion systems. |
| PSRR | 98 dB typ. at 1 kHz - suppresses switching noise from adjacent DC-DC converters, critical for RF transceivers and high-resolution ADCs. |
| Output Noise | 10 µVRMS (10 Hz–100 kHz) - meets stringent spectral purity requirements for PLL VCO supplies and low-noise op-amp biasing. |
| Quiescent Current | 18 µA typ. - extends standby time in always-on sensor nodes and IoT edge devices without compromising regulation integrity. |
| Enable Threshold | VENH = 1.2 V min, VENL = 0.4 V max - compatible with standard GPIOs and allows clean digital control without level-shifting. |
| Thermal Shutdown | 160°C trip / 140°C reset - protects against sustained overload or poor PCB copper area while permitting safe cyclic recovery under intermittent stress. |
Pinout & Package
XDFN4 package (Case 711AJ): 1 mm × 1 mm × 0.4 mm body, exposed thermal pad (EPAD) on underside, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 1.9–5.5 V; requires local 1 µF X7R/X5R ceramic capacitor; connects directly to upstream power source or filter stage. |
| 2 (GND) | Ground reference | Common return path for input, output, and enable; must be tied to EPAD and system ground plane for optimal thermal and noise performance. |
| 3 (EN) | Enable control input | Active-high logic: ≥1.2 V enables regulation; ≤0.4 V disables output and halts quiescent draw to 0.01 µA typ.; internal 200 nA pull-down ensures default-off state. |
| 4 (OUT) | Regulated output | Delivers stable 3.0 V; requires local 1 µF ceramic capacitor; no ESR requirement but ESR < 2 Ω recommended for best transient response. |
| EPAD | Thermal & electrical ground | Exposed pad beneath package; must be soldered to solid GND copper pour to achieve RJA = 198.1 °C/W and prevent thermal throttling at full load. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise | 10 µVRMS (10 Hz–100 kHz) enables direct use in sensitive RF VCO and ADC reference supplies without additional filtering. |
| No active discharge | "B" variant omits internal discharge FET - prevents unintended rapid VOUT collapse during disable, preserving state in latched or memory-retentive circuits. |
| Stable with minimal capacitance | Guaranteed stability with 1 µF ceramic COUT (X7R/X5R); eliminates need for larger or higher-ESR tantalum caps, reducing BOM count and board space. |
| High PSRR across frequency | 91 dB @ 100 Hz, 98 dB @ 1 kHz, 82 dB @ 10 kHz - effectively attenuates ripple from switchers operating at common frequencies (e.g., 500 kHz–2 MHz). |
| Robust protection suite | Integrated current limit (700 mA typ.), short-circuit tolerance (690 mA typ.), and thermal shutdown (160°C) eliminate need for external protection components. |
Applications
| Smartphone RF Front-End | Wireless LAN Baseband IC |
|---|---|
|
Use Scenario: Powering 3.0 V LNA, mixer, and PA bias rails in LTE/5G front-end modules where switching noise from PMICs must be suppressed. IC Role / Device Role: Low-noise post-regulator delivering clean 3.0 V from noisy 3.8 V buck converter output. Use Value: 98 dB PSRR at 1 kHz reduces conducted noise coupling into RF signal paths, improving EVM and ACLR by >3 dB per stage. |
Use Scenario: Supplying 3.0 V core voltage to WLAN baseband SoCs (e.g., QCA9377, BCM4356) during high-throughput 802.11ac/ax transmission bursts. IC Role / Device Role: High-transient-response LDO maintaining regulation during 450 mA load steps with <±40 mV deviation. Use Value: Fast load transient response prevents brownout-induced packet loss and maintains MAC layer timing integrity under burst traffic. |
| Industrial Camera Sensor Bias | Medical Ultrasound Beamformer |
|
Use Scenario: Providing 3.0 V analog supply to CMOS image sensor analog front-end (AFE), where power rail noise directly modulates pixel readout SNR. IC Role / Device Role: Ultra-low-noise (10 µVRMS) LDO isolating sensor AFE from digital domain noise. Use Value: 10 µVRMS noise floor preserves >72 dB SNR in 12-bit image pipelines, avoiding post-processing correction overhead. |
Use Scenario: Biasing 3.0 V transmit/receive beamformer ASICs in portable ultrasound systems requiring low-power, low-noise operation. IC Role / Device Role: Enable-controlled 3.0 V rail that powers beamformer channels only during active scan cycles. Use Value: 18 µA quiescent current and precise enable threshold reduce idle power by >95% versus always-on regulators, extending battery life per charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B302MR-G | 300 mA output, 250 mV dropout at 300 mA, 25 µVRMS noise, SOT-25 package (2.9 × 2.8 mm) | Lower current rating and higher noise limit suitability to sub-300 mA analog rails; larger footprint impacts ultra-compact designs. | Select when board space permits larger package and 300 mA suffices; verify PSRR profile (75 dB @ 1 kHz) meets system noise margin. |
| Richtek RT9080AL-30PU5 | 500 mA output, 200 mV dropout at 500 mA, 15 µVRMS noise, XDFN-4 (1.0 × 1.0 mm) with active discharge | Includes active discharge (unlike NCP161BMX300TBG), requiring careful sequencing in systems with hold-up capacitors or latched logic. | Choose when higher current headroom or faster discharge is required; confirm EN logic compatibility (1.0 V VENH) and validate discharge behavior in target application. |
Compared with XC6210B302MR-G, NCP161BMX300TBG delivers 50% higher output current and 2.5× lower noise in the same footprint; versus RT9080AL-30PU5, it avoids active discharge complexity while matching PSRR performance - making it optimal for noise-sensitive, enable-controlled 3.0 V rails where controlled discharge is unnecessary.
Availability
NCP161BMX300TBG is available at Aetrix Electronics and suitable for smartphone RF front-end modules, wireless LAN baseband ICs, and industrial camera sensor biasing requiring stable component supply, full traceability, and lifecycle continuity support.
Supply support for NCP161BMX300TBG 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 family targets ultra-low-noise, high-PSRR LDO regulation for RF and precision analog circuits - specifically engineered to replace legacy regulators in battery-powered mobile and wireless infrastructure where spectral purity and transient fidelity are non-negotiable.
FAQ
What is the maximum input voltage rating for the NCP161BMX300TBG?
The NCP161BMX300TBG has an absolute maximum input voltage rating of 6 V. Operation above 5.5 V is not recommended for continuous use, as the device is specified for reliable operation within 1.9 V to 5.5 V. Exceeding 6 V risks permanent damage per the Absolute Maximum Ratings table in the datasheet.
Does the NCP161BMX300TBG include active output discharge functionality?
No, the NCP161BMX300TBG does not include active output discharge. The "B" suffix explicitly denotes the non-active-discharge variant. When disabled via the EN pin, the output discharges only through external load paths or parasitic capacitance - unlike "A"-suffix versions which integrate a 280 Ω discharge resistor.
What ceramic capacitor dielectric is recommended for the NCP161BMX300TBG output?
X7R or X5R dielectric ceramic capacitors are recommended for the NCP161BMX300TBG output. These offer stable capacitance over temperature and DC bias - critical because small-case 0201/0402 MLCCs can lose >50% effective capacitance at rated voltage. The datasheet specifies 1 µF minimum, with ESR < 2 Ω preferred.
How does the thermal performance of the NCP161BMX300TBG compare across its package options?
The NCP161BMX300TBG in XDFN4 (Case 711AJ) has RJA = 198.1 °C/W, significantly better than SOT-23-5 (218 °C/W) and comparable to WLCSP4 (108 °C/W only with optimized 2 oz Cu layout). The XDFN4's exposed pad enables predictable thermal design on standard 1 oz Cu PCBs without requiring complex thermal vias.
Can the NCP161BMX300TBG be used with input voltages below 2.0 V?
No - the NCP161BMX300TBG has a minimum operating input voltage of 1.9 V, but its dropout voltage rises sharply below 2.0 V input when delivering 450 mA. At 1.95 V input, the achievable output drops below 3.0 V due to the 165 mV typical dropout. Reliable 3.0 V regulation requires ≥3.165 V input at full load.
NCP161BMX300TBG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 4-XDFN Exposed Pad
- 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):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.275V @ 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-XDFN (1x1)
NCP161BMX300TBG FAQ
1.How can I place an order for NCP161BMX300TBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP161BMX300TBG 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 NCP161BMX300TBG reliable?
The price and inventory of NCP161BMX300TBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP161BMX300TBG is usually 5 days.
3.What payment methods are accepted for NCP161BMX300TBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP161BMX300TBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP161BMX300TBG?
NCP161BMX300TBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP161BMX300TBG 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 NCP161BMX300TBG?
For technical support, including NCP161BMX300TBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP161BMX300TBG requirements.
6.How does Aetrix verify that NCP161BMX300TBG is sourced from the original manufacturer or authorized distributors?
All NCP161BMX300TBG 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 NCP161BMX300TBG meets industry standards.
7.What is the process for return or replacement of NCP161BMX300TBG?
All NCP161BMX300TBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP161BMX300TBG, 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 NCP161BMX300TBG part is unused and in its original packaging.
Return procedure for NCP161BMX300TBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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