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onsemi NCP163AMX275TBG
- Part No.:
- NCP163AMX275TBG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP163AMX275TBG.pdf
- Description:
- IC REG LINEAR 2.75V 250MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,130
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Product details
Overview
NCP163AMX275TBG from onsemi is a 250 mA ultra-low-noise, high-PSRR LDO regulator optimized for RF and analog circuits. It delivers 2.75 V fixed output with ±2% accuracy over load/temperature, 80 mV dropout at 250 mA (XDFN4 package), 6.5 µVRMS output noise (10 Hz–100 kHz), and 92 dB PSRR at 1 kHz - enabling clean power in smartphones, wireless LAN modules, and camera sensor rails.
For engineers reviewing the NCP163AMX275TBG datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.75 V fixed output, XDFN4 1 mm × 1 mm × 0.4 mm package, active discharge capability, ultra-low quiescent current (12 µA typ.), and stability with 1 µF ceramic capacitors.
Technical Context
The NCP163AMX275TBG employs a PMOS pass transistor architecture with integrated bandgap reference, soft-start, thermal shutdown (160°C trip), and active discharge (280 Ω pull-down). Its enable logic requires VEN > 1.2 V to activate regulation and VEN < 0.4 V to disable with fast output discharge.
Designed for battery-powered RF/analog systems, it achieves excellent line/load transient response (±1 mV line, ±40 mV load) and maintains stability across −40°C to +125°C junction temperature with minimal external components - only 1 µF input and output ceramic capacitors required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.75 V ±2% - ensures precise biasing for 2.7 V–2.8 V analog/RF ICs without external feedback. |
| Max Output Current | 250 mA - sufficient for powering RF transceivers, image sensors, or audio codecs in portable devices. |
| Dropout Voltage | 85 mV at 250 mA (VOUT = 2.75 V, XDFN4) - enables operation from 2.835 V input, extending battery runtime in single-cell Li-ion systems. |
| Output Noise | 6.5 µVRMS (10 Hz–100 kHz) - minimizes phase noise in VCOs and SNR degradation in ADCs/DACs. |
| PSRR | 92 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters feeding noisy supply rails. |
| Quiescent Current | 12 µA typ. - preserves battery life during standby in always-on sensor or connectivity modules. |
| Enable Threshold | VENH = 1.2 V, VENL = 0.4 V - compatible with standard GPIOs and supports controlled power sequencing. |
Pinout & Package
XDFN4 package: 1 mm × 1 mm × 0.4 mm, exposed pad (EPAD) for thermal enhancement, RoHS-compliant Pb-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin A1) | Input voltage supply | Accepts 2.2 V–5.5 V input; requires local 1 µF ceramic decoupling to minimize trace inductance effects. |
| OUT (Pin A2) | Regulated output | Delivers stable 2.75 V; must connect 1 µF ceramic capacitor directly to this pin for stability and transient response. |
| EN (Pin B1) | Enable control | Active-high logic: >1.2 V enables regulation; <0.4 V disables and activates 280 Ω active discharge to GND. |
| GND (Pin B2) | Ground reference | Common return path; EPAD must be soldered to PCB ground plane to achieve RJA = 198.1°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise regulation | 6.5 µVRMS output noise enables use in low-phase-noise RF synthesizers and high-SNR audio signal chains. |
| High PSRR across frequency | 92 dB at 1 kHz and 85 dB at 10 kHz suppresses ripple from switching regulators without additional filtering. |
| Active output discharge | 280 Ω internal pull-down discharges output rapidly upon disable, preventing unintended wake-up of downstream circuitry. |
| Stable with small ceramics | Guaranteed stability with ≥0.7 µF X7R/X5R MLCCs - supports 0201/0402 footprints for space-constrained mobile designs. |
| Thermal protection | 160°C shutdown with 20°C hysteresis prevents damage during sustained overload or poor heatsinking conditions. |
Applications
| Smartphone RF Front-End | Wi-Fi 6/6E Transceiver Bias |
|---|---|
Use Scenario: Powering PA driver stages and LNA bias rails in multi-band smartphone RF modules. IC Role / Device Role / Timing Role: Low-noise post-regulator for sensitive RF ICs requiring clean 2.75 V supply independent of noisy system PMIC outputs. Use Value: 6.5 µVRMS noise and 92 dB PSRR prevent AM-to-PM conversion and EVM degradation in 256-QAM transmissions. | Use Scenario: Supplying 2.75 V to Wi-Fi 6E transceivers operating in 6 GHz band where spectral purity is critical. IC Role / Device Role / Timing Role: Final-stage LDO delivering regulated voltage to RF synthesizer VCO and mixer cores. Use Value: Ultra-low dropout (85 mV) allows operation from 2.835 V buck converter output, maximizing efficiency while maintaining noise immunity. |
| Industrial Camera Sensor Rail | Portable Audio Codec Power |
Use Scenario: Providing bias to CMOS image sensor analog front-end (AFE) and column ADC in compact security cameras. IC Role / Device Role / Timing Role: Dedicated low-noise LDO for sensor analog supply, isolated from digital switching noise. Use Value: ±2% output accuracy over temperature ensures consistent pixel response and reduces calibration drift across −25°C to +70°C operating range. | Use Scenario: Powering stereo audio codec ICs in Bluetooth headphones and voice assistants. IC Role / Device Role / Timing Role: Clean 2.75 V rail for DAC/ADC reference and analog amplifier stages. Use Value: 12 µA quiescent current extends playback time in battery-operated devices without compromising THD+N performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B275MR-G | 250 mA, 2.75 V fixed, 12 µA IQ, but no active discharge; PSRR = 70 dB @ 1 kHz. | Lacks active discharge and lower PSRR limits use in fast-power-down systems and high-ripple environments. | Select when cost sensitivity outweighs need for active discharge or ultra-high PSRR. |
| Richtek RT9080-275GJ6F | 300 mA, 2.75 V fixed, 25 µA IQ, active discharge (300 Ω), PSRR = 85 dB @ 1 kHz. | Higher IQ and slightly lower PSRR; larger SOT-23-5 footprint (2.9 mm × 2.8 mm vs. XDFN4's 1 mm × 1 mm). | Choose for higher current headroom and compatibility with legacy SOT-23 layouts. |
Compared with XC6210B275MR-G and RT9080-275GJ6F, the NCP163AMX275TBG offers superior PSRR (92 dB), smaller XDFN4 footprint, and matched 12 µA quiescent current - making it optimal for space-constrained, noise-sensitive RF/analog applications where active discharge is required.
Availability
NCP163AMX275TBG is available at Aetrix Electronics and suitable for smartphone RF front-end, Wi-Fi 6E transceiver bias, and industrial camera sensor rail applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP163AMX275TBG 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP163 product line targets ultra-low-noise, high-PSRR power regulation for RF transceivers, cellular baseband processors, and precision analog subsystems in battery-powered portable electronics.
FAQ
What is the output voltage tolerance of the NCP163AMX275TBG over temperature and load?
The NCP163AMX275TBG provides ±2% output voltage accuracy across −40°C to +125°C junction temperature and 0–250 mA load range, as specified in the Electrical Characteristics table for XDFN4 packages. This tight tolerance ensures reliable biasing for sensitive RF and analog ICs without requiring external trimming.
Does the NCP163AMX275TBG require an external capacitor on the EN pin?
No, the NCP163AMX275TBG does not require an external capacitor on the EN pin. Its enable input has internal hysteresis and a 200 nA pull-down current source, ensuring robust noise immunity and automatic disable when left floating. External RC filtering is unnecessary unless specific timing control is needed beyond the device's inherent 120 µs turn-on time.
Can the NCP163AMX275TBG operate with a 1.8 V input voltage?
No, the NCP163AMX275TBG cannot operate with a 1.8 V input. Its minimum operating input voltage is 2.2 V per the Absolute Maximum Ratings and Electrical Characteristics tables. At 2.75 V output, the minimum functional input is 2.75 V + dropout (85 mV min) = 2.835 V, so 1.8 V is below specification and will not regulate.
What is the thermal resistance (RJA) of the NCP163AMX275TBG in its XDFN4 package?
The NCP163AMX275TBG in XDFN4 package has a thermal resistance of 198.1°C/W (junction-to-ambient), measured per JEDEC JESD51-7 on a standard test board. This value assumes proper PCB layout with the exposed pad soldered to a thermal copper plane; omitting EPAD connection degrades thermal performance significantly.
Is active discharge enabled by default on the NCP163AMX275TBG?
Yes, active discharge is enabled by default on the NCP163AMX275TBG. As indicated by the "A" prefix in the part number and confirmed in the Ordering Information table, this variant includes an internal 280 Ω discharge path activated when EN < 0.4 V, ensuring rapid output voltage decay to prevent latch-up or false triggering in downstream circuitry.
NCP163AMX275TBG 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):
- 2.75V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 20 µA
- Current - Supply (Max):
- -
- PSRR:
- 91dB ~ 60dB (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)
NCP163AMX275TBG FAQ
1.How can I place an order for NCP163AMX275TBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP163AMX275TBG 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 NCP163AMX275TBG reliable?
The price and inventory of NCP163AMX275TBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP163AMX275TBG is usually 5 days.
3.What payment methods are accepted for NCP163AMX275TBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP163AMX275TBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP163AMX275TBG?
NCP163AMX275TBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP163AMX275TBG 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 NCP163AMX275TBG?
For technical support, including NCP163AMX275TBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP163AMX275TBG requirements.
6.How does Aetrix verify that NCP163AMX275TBG is sourced from the original manufacturer or authorized distributors?
All NCP163AMX275TBG 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 NCP163AMX275TBG meets industry standards.
7.What is the process for return or replacement of NCP163AMX275TBG?
All NCP163AMX275TBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP163AMX275TBG, 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 NCP163AMX275TBG part is unused and in its original packaging.
Return procedure for NCP163AMX275TBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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