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onsemi NCP163AMX250TBG
- Part No.:
- NCP163AMX250TBG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP163AMX250TBG.pdf
- Description:
- IC REG LINEAR 2.5V 250MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,357
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Product details
Overview
NCP163AMX250TBG from onsemi is a 250 mA ultra-low-noise, high-PSRR LDO regulator optimized for RF and analog circuits. It delivers fixed 2.5 V output with ±2% accuracy over load and temperature, 80 mV dropout at 250 mA, 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 NCP163AMX250TBG datasheet, pinout, applications, or equivalent options, key selection criteria include its XDFN4 package compatibility with 1 µF ceramic input/output capacitors, active discharge capability, thermal shutdown (160°C), and support for battery-powered systems requiring sub-12 µA quiescent current.
Technical Context
The NCP163AMX250TBG integrates a PMOS pass transistor with bandgap reference, soft-start circuitry, and enable-controlled active discharge. Its architecture achieves ultra-low noise via internal filtering and high PSRR through multi-stage error amplifier compensation and low-impedance output stage design.
It operates across 2.2 V to 5.5 V input, regulates precisely at 2.5 V nominal output, and maintains stability with 1 µF X7R/X5R ceramic capacitors. The device features thermal shutdown (160°C trip, 140°C reset), current limiting (700 mA typ.), and robust line/load transient response - critical for powering sensitive RF front-ends and high-resolution ADCs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2% over full load/temperature range - ensures stable bias for precision analog stages without external feedback. |
| Max Output Current | 250 mA continuous - sufficient for RF transceivers, image sensors, and low-power microcontrollers. |
| Dropout Voltage | 80 mV at 250 mA - enables operation from single-cell Li-ion (3.0 V min) while maintaining regulation. |
| Output Noise | 6.5 µVRMS (10 Hz–100 kHz) - minimizes phase noise in VCOs and quantization noise in ADCs. |
| PSRR | 92 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters feeding shared input rails. |
| Quiescent Current | 12 µA typical - extends battery life in always-on sensor nodes and standby modes. |
| Enable Threshold | VENH = 1.2 V, VENL = 0.4 V - compatible with 1.8 V/3.3 V GPIOs without level-shifting. |
Pinout & Package
XDFN4 package (1 mm × 1 mm × 0.4 mm), thermally enhanced with exposed pad (EPAD) tied to GND for improved power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 2.2–5.5 V; requires local 1 µF ceramic decoupling to minimize AC impedance. |
| OUT | Regulated output | Delivers 2.5 V ±2%; must be bypassed with 1 µF ceramic capacitor placed adjacent to pin. |
| EN | Enable control input | Active-high logic: ≥1.2 V enables regulation; ≤0.4 V disables output and activates 280 Ω discharge path. |
| GND | Ground reference | Common return for IN, OUT, and EN; EPAD must be soldered to PCB ground plane for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise | 6.5 µVRMS output noise enables direct powering of RF synthesizers and audio codecs without additional filtering. |
| High PSRR | 92 dB at 1 kHz suppresses ripple from noisy switchers - critical for LTE/Wi-Fi coexistence in compact PCBs. |
| Active output discharge | 280 Ω internal discharge path pulls VOUT to GND within microseconds upon disable - prevents floating outputs in multi-rail sequencing. |
| Stable with 1 µF ceramics | Eliminates need for large bulk capacitors - reduces BOM count and board area in space-constrained mobile designs. |
| Thermal protection | 160°C shutdown with 20°C hysteresis prevents damage during sustained overload or poor heatsinking. |
Applications
| Smartphone RF Front-End | Wireless LAN Transceiver |
|---|---|
Use Scenario: Powering 5 GHz Wi-Fi 6 RFIC LNA and mixer stages in slim smartphone bezels. IC Role / Device Role / Timing Role: Low-noise post-regulator for RF signal chain biasing, placed downstream of main PMIC. Use Value: 6.5 µVRMS noise avoids reciprocal mixing degradation; 92 dB PSRR isolates RFIC from noisy SoC power domains. |
Use Scenario: Supplying 2.5 V to IEEE 802.11ac PHY IC in portable hotspot devices. IC Role / Device Role / Timing Role: Dedicated LDO for analog RF section, enabled synchronously with WLAN wake-up signal. Use Value: Active discharge ensures rapid VOUT decay during sleep mode, meeting 10 µs turn-off timing requirements. |
| Industrial Camera Sensor Rail | Medical Wearable Analog Front-End |
Use Scenario: Biasing CMOS image sensor analog core and column ADC in compact machine vision modules. IC Role / Device Role / Timing Role: Precision 2.5 V rail generator with tight load regulation (<0.001 %/mA) for pixel-level consistency. Use Value: 80 mV dropout allows operation from 3.3 V system rail; ±2% accuracy maintains sensor gain calibration across temperature. |
Use Scenario: Powering ECG/EEG analog signal conditioning circuitry in battery-operated biosensors. IC Role / Device Role / Timing Role: Ultra-low-IQ (12 µA) LDO for always-on biopotential amplifiers with fast wake-up. Use Value: Sub-12 µA quiescent current extends coin-cell life beyond 12 months; thermal shutdown protects against skin-contact overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS7A2025PDQNR | 2.5 V fixed, 300 mA, 6.5 µVRMS noise, but no active discharge; 0.5 µF min COUT. | Lacks active discharge - unsuitable where rapid VOUT decay is required for sequencing or safety. | Select when board space is constrained and discharge is handled externally or not needed. |
| Analog Devices ADP125ARHZ-2.5-R7 | 2.5 V fixed, 500 mA, 22 µVRMS noise, 70 dB PSRR @ 1 kHz, SOT-23-5 package. | Higher noise and lower PSRR limit use in RF-sensitive applications; larger SOT-23-5 footprint. | Choose for higher current needs (>250 mA) where RF performance is secondary to cost and availability. |
Compared with TPS7A2025PDQNR and ADP125ARHZ-2.5-R7, the NCP163AMX250TBG uniquely combines 250 mA capability, 6.5 µVRMS noise, 92 dB PSRR, and integrated active discharge in a 1 mm² XDFN4 package - making it optimal for miniaturized RF and medical analog systems demanding both cleanliness and controlled power-down.
Availability
NCP163AMX250TBG is available at Aetrix Electronics and suitable for smartphone RF front-end, wireless LAN transceiver, and industrial camera sensor applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP163AMX250TBG 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP163AMX250TBG belongs to onsemi's high-performance LDO family designed specifically for noise-sensitive RF and analog signal chains in battery-powered portable electronics.
FAQ
What is the maximum input voltage rating for the NCP163AMX250TBG?
The NCP163AMX250TBG has an absolute maximum input voltage rating of 6 V. Operation above 5.5 V violates the recommended operating conditions and may cause permanent damage. For reliable 2.5 V output regulation, VIN must remain within 2.2 V to 5.5 V per the datasheet's Electrical Characteristics table.
Does the NCP163AMX250TBG include thermal shutdown protection?
Yes, the NCP163AMX250TBG incorporates thermal shutdown with a typical trip threshold of 160°C and automatic recovery at 140°C. This feature protects the device during sustained overload or inadequate PCB copper area, and is fully characterized across temperature and process corners per the datasheet's Absolute Maximum Ratings and Typical Characteristics sections.
Can the NCP163AMX250TBG operate with only 1 µF output capacitance?
Yes, the NCP163AMX250TBG is explicitly designed and characterized to remain stable with a minimum 1 µF X7R/X5R ceramic capacitor on the output. The datasheet confirms stability down to 0.7 µF effective capacitance, accounting for DC bias and temperature derating - eliminating need for larger or higher-ESR alternatives.
What is the purpose of the EPAD on the NCP163AMX250TBG XDFN4 package?
The exposed pad (EPAD) on the NCP163AMX250TBG serves as a thermal and electrical connection to GND. When soldered to a PCB ground plane, it reduces thermal resistance (RJA = 198.1°C/W) and improves power dissipation - critical for sustaining 250 mA output under elevated ambient temperatures per the Thermal Characteristics table.
How does the enable pin function on the NCP163AMX250TBG?
The EN pin on the NCP163AMX250TBG is active-high: applying ≥1.2 V enables regulation, while ≤0.4 V disables the output and activates the 280 Ω internal discharge path. An internal 200 nA pull-down ensures safe default-off state when EN is left floating, as confirmed in the Pin Function Description and Applications Information sections.
NCP163AMX250TBG 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.175V @ 250mA
- 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)
NCP163AMX250TBG FAQ
1.How can I place an order for NCP163AMX250TBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP163AMX250TBG 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 NCP163AMX250TBG reliable?
The price and inventory of NCP163AMX250TBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP163AMX250TBG is usually 5 days.
3.What payment methods are accepted for NCP163AMX250TBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP163AMX250TBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP163AMX250TBG?
NCP163AMX250TBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP163AMX250TBG 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 NCP163AMX250TBG?
For technical support, including NCP163AMX250TBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP163AMX250TBG requirements.
6.How does Aetrix verify that NCP163AMX250TBG is sourced from the original manufacturer or authorized distributors?
All NCP163AMX250TBG 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 NCP163AMX250TBG meets industry standards.
7.What is the process for return or replacement of NCP163AMX250TBG?
All NCP163AMX250TBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP163AMX250TBG, 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 NCP163AMX250TBG part is unused and in its original packaging.
Return procedure for NCP163AMX250TBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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