My Inquiry
My Account
onsemi NCP163AMX285TBG
- Part No.:
- NCP163AMX285TBG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP163AMX285TBG.pdf
- Description:
- IC REG LINEAR 2.85V 250MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,476
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NCP163AMX285TBG from onsemi is a 250 mA ultra-low-noise, high-PSRR LDO regulator delivering a fixed 2.85 V output with ±2% accuracy over load and temperature. It features 80 mV dropout at 250 mA, 6.5 µVRMS output noise (10 Hz–100 kHz), and 92 dB PSRR at 1 kHz-optimized for RF and analog circuits in space-constrained portable devices.
For engineers reviewing the NCP163AMX285TBG datasheet, pinout, applications, or equivalent options, key selection criteria include its WLCSP4/XDFN4/SOT23-5L package compatibility, active discharge capability (Version A), 12 µA quiescent current, and stability with 1 µF ceramic capacitors-critical for battery-powered RF subsystems requiring clean, low-noise biasing.
Technical Context
The NCP163AMX285TBG implements a PMOS pass transistor architecture with integrated soft-start and thermal shutdown (160°C trip, 140°C reset). Its enable logic accepts 1.2 V "H" and 0.4 V "L" thresholds, supporting controlled power sequencing in multi-rail systems.
It delivers ultra-stable regulation via bandgap reference and MOSFET driver with current limiting (700 mA typ.), while maintaining <±0.01%/mA load regulation (WLCSP/XDFN) and 0.02%/V line regulation-enabling precision biasing of sensitive ADCs, VCOs, and RF front-ends without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85 V ±2% - ensures stable bias for 2.8 V–3.0 V RF ICs without external feedback network |
| Max Output Current | 250 mA - sufficient to power single-band RF transceivers or dual-core sensor signal chains |
| Dropout Voltage | 80 mV at 250 mA - enables operation from 2.93 V input, preserving battery runtime in Li-ion (3.0–4.2 V) systems |
| Output Noise | 6.5 µVRMS (10 Hz–100 kHz) - minimizes phase noise in local oscillators and jitter in high-speed ADC clocks |
| PSRR | 92 dB at 1 kHz - suppresses switching noise from DC/DC converters feeding adjacent digital blocks |
| Quiescent Current | 12 µA typ. - extends standby time in always-on wireless sensors and IoT edge nodes |
| Enable Threshold | VENH = 1.2 V, VENL = 0.4 V - compatible with 1.8 V/3.3 V GPIOs for precise system-level power control |
Pinout & Package
NCP163AMX285TBG is packaged in XDFN4 (1 mm × 1 mm × 0.4 mm), featuring an exposed pad (EPAD) for thermal enhancement. The package supports reflow soldering and is RoHS-compliant, Pb-free, and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 2.2–5.5 V; requires 1 µF X7R/X5R ceramic capacitor placed adjacent to minimize trace inductance |
| OUT | Regulated output | Delivers 2.85 V; must be bypassed with 1 µF ceramic capacitor near pin to ensure stability and transient response |
| EN | Chip enable control | Active-high logic: >1.2 V enables regulation; <0.4 V disables output and activates 280 Ω active discharge path |
| GND | Ground reference | Common return for IN, OUT, and EN; EPAD must be tied to GND plane for optimal thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise regulation | 6.5 µVRMS output noise enables direct powering of RF synthesizers without additional filtering |
| High PSRR across frequency | 92 dB @ 1 kHz, 85 dB @ 10 kHz - rejects ripple from shared power rails in mixed-signal SoC designs |
| Active output discharge | 280 Ω internal discharge path pulls VOUT to GND within microseconds upon disable - prevents floating bias in sequenced power domains |
| Stability with minimal capacitance | Guaranteed stable with ≥1 µF ceramic COUT - eliminates need for larger, higher-ESR tantalum or electrolytic capacitors |
| Thermal protection | 160°C junction shutdown with 20°C hysteresis - safeguards against PCB layout-induced overheating during peak RF transmit bursts |
Applications
| 5G NR Front-End Module Bias | Smartphone Camera ISP Core Supply |
|---|---|
Use Scenario: Powering GaAs pHEMT driver amplifiers and LNA stages in sub-6 GHz 5G handsets. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO providing clean 2.85 V bias to preserve EVM and ACLR performance. Use Value: 6.5 µVRMS noise and 92 dB PSRR prevent AM-to-PM distortion and adjacent-channel interference under dynamic RF load. | Use Scenario: Supplying image signal processor (ISP) core logic in dual-camera smartphone modules. IC Role / Device Role / Timing Role: Primary 2.85 V rail for ISP digital core, enabling low-power burst-mode operation during preview capture. Use Value: 12 µA quiescent current and 250 mA capability support rapid wake/sleep cycles without compromising frame rate or image quality. |
| Wireless Audio Codec Reference Voltage | Industrial IoT Sensor Signal Chain |
Use Scenario: Generating ultra-clean reference voltage for stereo audio DACs in Bluetooth LE earbuds. IC Role / Device Role / Timing Role: Fixed-output LDO supplying 2.85 V to DAC analog section and headphone amplifier bias rails. Use Value: 6.5 µVRMS noise directly translates to >110 dB SNR in audio playback, meeting Hi-Res Audio certification requirements. | Use Scenario: Powering precision analog front-end (AFE) and SAR ADC in battery-operated environmental sensor nodes. IC Role / Device Role / Timing Role: Stable 2.85 V supply for 16-bit ADC reference and op-amp signal conditioning circuitry. Use Value: ±2% output accuracy and <0.01%/mA load regulation ensure consistent measurement linearity across temperature and battery discharge profiles. |
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, 2.85 V fixed, 25 µA IQ, no active discharge, SOT-25 package | Lacks active discharge and has higher quiescent current - unsuitable for fast power-down sequencing | Select when cost sensitivity outweighs need for active discharge and ultra-low IQ |
| Richtek RT9080A-285GJ6F | 300 mA, 2.85 V fixed, 20 µA IQ, 120 mV dropout, WDFN-6 package | Higher dropout and larger footprint - reduces efficiency in low-VIN battery scenarios and increases board area | Select when higher output current headroom is required and 120 mV dropout is acceptable |
Compared with XC6210B285MR-G and RT9080A-285GJ6F, the NCP163AMX285TBG offers superior noise performance (6.5 µVRMS vs. ≥12 µVRMS), lower quiescent current (12 µA vs. ≥20 µA), and integrated active discharge - making it optimal for RF-critical, battery-constrained designs where signal integrity and fast power cycling are mandatory.
Availability
NCP163AMX285TBG is available at Aetrix Electronics and suitable for 5G front-end modules, smartphone camera ISPs, wireless audio codecs, and industrial IoT sensor signal chains requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP163AMX285TBG 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 leader focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications, with deep expertise in power management and signal integrity solutions.
The NCP163AMX285TBG belongs to onsemi's NCP163 ultra-low-noise LDO family, engineered specifically for RF and high-performance analog circuits demanding exceptional PSRR, sub-10 µVRMS noise, and seamless integration into compact, battery-powered systems.
FAQ
What is the maximum input voltage rating for the NCP163AMX285TBG?
The NCP163AMX285TBG has an absolute maximum input voltage rating of 6 V. Operation above 5.5 V is not recommended, as the device is specified for continuous operation only within 2.2 V to 5.5 V. Exceeding 6 V risks permanent damage due to internal overvoltage stress on the PMOS pass transistor and bandgap reference circuitry.
Does the NCP163AMX285TBG require an external capacitor on the EN pin for noise immunity?
No, the NCP163AMX285TBG does not require an external capacitor on the EN pin. Its enable threshold is well-defined (1.2 V "H", 0.4 V "L") and the pin includes an internal 200 nA pull-down current source. Adding capacitance may slow turn-on timing unpredictably; instead, routing the EN trace away from noisy signals and using a short, direct connection to the controller GPIO is sufficient for robust operation.
Can the NCP163AMX285TBG be used with a 0.7 µF output capacitor?
Yes, the NCP163AMX285TBG is designed to remain stable with a minimum effective output capacitance of 0.7 µF, accounting for DC bias, temperature, and package-related derating-especially relevant for small-case 0201/0402 ceramics. However, 1 µF is recommended for guaranteed performance across all conditions, including worst-case ESR and temperature extremes.
What is the thermal resistance (RJA) of the NCP163AMX285TBG in its XDFN4 package?
The NCP163AMX285TBG in XDFN4 package has a typical junction-to-ambient thermal resistance (RJA) of 198.1 °C/W when mounted on a standard JEDEC test board. This value assumes 1 oz copper and minimal PCB copper area; adding thermal vias to the EPAD and increasing copper area can reduce RJA significantly-down to ~120 °C/W with 2 oz copper and optimized layout.
Is active discharge enabled by default on the NCP163AMX285TBG?
Yes, the NCP163AMX285TBG is a Version A device and includes active discharge functionality by default. When the EN pin is pulled below 0.4 V, the internal 280 Ω discharge path connects OUT to GND, discharging the output capacitor rapidly. This behavior is confirmed in the ordering information table and electrical characteristics (RDIS = 280 Ω).
NCP163AMX285TBG 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):
- 2.85V
- 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)
NCP163AMX285TBG FAQ
1.How can I place an order for NCP163AMX285TBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP163AMX285TBG 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 NCP163AMX285TBG reliable?
The price and inventory of NCP163AMX285TBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP163AMX285TBG is usually 5 days.
3.What payment methods are accepted for NCP163AMX285TBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP163AMX285TBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP163AMX285TBG?
NCP163AMX285TBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP163AMX285TBG 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 NCP163AMX285TBG?
For technical support, including NCP163AMX285TBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP163AMX285TBG requirements.
6.How does Aetrix verify that NCP163AMX285TBG is sourced from the original manufacturer or authorized distributors?
All NCP163AMX285TBG 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 NCP163AMX285TBG meets industry standards.
7.What is the process for return or replacement of NCP163AMX285TBG?
All NCP163AMX285TBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP163AMX285TBG, 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 NCP163AMX285TBG part is unused and in its original packaging.
Return procedure for NCP163AMX285TBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCP163AMX285TBG Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
