My Inquiry
My Account
onsemi NCP161AMX250TBG
- Part No.:
- NCP161AMX250TBG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP161AMX250TBG.pdf
- Description:
- IC REG LINEAR 2.5V 450MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,888
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NCP161AMX250TBG from onsemi is a 450 mA ultra-low-noise, high-PSRR LDO regulator optimized for RF and analog circuits. It delivers a fixed 2.5 V output with ±2% accuracy over load and temperature, 150 mV dropout at 450 mA, 10 µVRMS output noise, and 98 dB PSRR at 1 kHz - enabling clean power in smartphone baseband, Wi-Fi front-end, and camera sensor rails.
For engineers reviewing the NCP161AMX250TBG datasheet, pinout, applications, or equivalent options, this page provides 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).
Technical Context
The NCP161AMX250TBG 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 1 µF ceramic input/output capacitors, eliminating need for ESR tuning.
It integrates active discharge (280 Ω pull-down) when disabled, thermal shutdown (160 °C trip), and current limiting (700 mA typ.) - all operating across −40 °C to +125 °C junction temperature without derating. The EN pin controls both regulation and discharge activation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2% - ensures precise biasing for ADC references and RF synthesizers without external feedback. |
| Max Output Current | 450 mA continuous - supports multi-rail SoC subsystems including LTE transceivers and image signal processors. |
| Dropout Voltage | 190 mV at 450 mA - enables operation from 2.69 V input, compatible with single-cell Li-ion (2.7–4.2 V) systems. |
| PSRR | 98 dB at 1 kHz - suppresses switching noise from DC/DC converters feeding adjacent digital domains. |
| Output Noise | 10 µVRMS (10 Hz–100 kHz) - meets stringent phase-noise requirements for VCO and PLL power rails. |
| Quiescent Current | 18 µA typ. - extends battery life in always-on sensor and IoT wake-up circuits. |
| Enable Threshold | VENH = 1.2 V, VENL = 0.4 V - compatible with 1.8 V GPIO logic without level-shifting. |
Pinout & Package
XDFN4 package (Case 711AJ): 1 mm × 1 mm × 0.4 mm, 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 X7R/X5R ceramic capacitor placed adjacent to minimize trace inductance. |
| 2 (GND) | Ground reference | Common return path; EPAD must be soldered to PCB ground plane for thermal and electrical integrity. |
| 3 (EN) | Enable control input | Active-high logic: ≥1.2 V enables regulation; ≤0.4 V disables output and activates 280 Ω active discharge. |
| 4 (OUT) | Regulated output | Delivers 2.5 V ±2%; bypassed with 1 µF ceramic capacitor; stable down to 0.7 µF effective capacitance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise | 10 µVRMS output noise enables direct powering of RF VCOs and high-resolution SAR ADCs without additional filtering. |
| High PSRR | 98 dB at 1 kHz and 82 dB at 10 kHz suppresses ripple from buck converters sharing the same battery source. |
| Active output discharge | 280 Ω internal pull-down discharges output within microseconds upon disable - prevents floating rail during power sequencing. |
| Thermal shutdown | 160 °C trip / 140 °C reset hysteresis protects against sustained overload or poor heatsinking in compact modules. |
| Low quiescent current | 18 µA typical IQ allows use in always-on wearable sensors without compromising battery runtime. |
Applications
| Smartphone RF Front-End | Wi-Fi 6/6E Transceiver Power |
|---|---|
|
Use Scenario: Powering 5 GHz PA bias and LNA supply rails in multi-band smartphone designs. IC Role / Device Role / Timing Role: Low-noise local LDO delivering clean 2.5 V to RF amplifiers and mixers. Use Value: 10 µVRMS noise and 98 dB PSRR prevent AM-to-PM distortion and maintain EVM < 2.5% under dynamic load. |
Use Scenario: Supplying 2.5 V to Wi-Fi 6E transceiver ICs requiring tight voltage tolerance and fast transient response. IC Role / Device Role / Timing Role: Primary analog rail regulator with active discharge for controlled power-down sequencing. Use Value: ±40 mV load transient excursion and 120 µs turn-on time meet IEEE 802.11ax power-state transition timing budgets. |
| Industrial Camera Sensor Bias | Medical Ultrasound Beamformer |
|
Use Scenario: Providing regulated 2.5 V to CMOS image sensor analog front-end (AFE) and column ADC drivers. IC Role / Device Role / Timing Role: Precision analog supply with ±2% accuracy and sub-200 mV dropout. Use Value: 190 mV dropout enables operation from 2.69 V input, supporting dual-battery backup configurations. |
Use Scenario: Powering ultrasound beamformer channel ICs where phase coherence depends on supply stability. IC Role / Device Role / Timing Role: Ultra-low-noise LDO for time-critical analog signal paths in portable diagnostic devices. Use Value: 10 µVRMS noise floor preserves SNR > 72 dB in 12-bit beamforming DAC outputs. |
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, 65 dB PSRR @ 1 kHz, 12 µVRMS noise, SOT-23-5 package | Limited to 300 mA; lower PSRR reduces immunity to DC/DC switching noise in dense RF layouts | Select when board space permits SOT-23-5 and 300 mA suffices; not suitable for 450 mA RF PA bias. |
| Analog Devices ADP1621ACPZ-2.5-R7 | 2.5 V fixed, 500 mA, 70 dB PSRR @ 1 kHz, 25 µVRMS noise, LFCSP-6 package | Higher noise degrades RF spectral purity; no active discharge complicates power sequencing | Use only if higher current (500 mA) outweighs noise/PSRR trade-off and discharge is handled externally. |
Compared with TPS7A2025PDQNR and ADP1621ACPZ-2.5-R7, the NCP161AMX250TBG uniquely combines 450 mA capability, 98 dB PSRR, and 10 µVRMS noise in a 1 mm × 1 mm XDFN4 package - making it the only option meeting simultaneous RF noise, current, and size constraints in modern mobile designs.
Availability
NCP161AMX250TBG is available at Aetrix Electronics and suitable for smartphone RF front-end, Wi-Fi 6E transceiver, and industrial camera sensor applications requiring stable component supply, full lifecycle support, and RoHS-compliant packaging.
Supply support for NCP161AMX250TBG 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 focused on energy-efficient technologies for automotive, industrial, cloud, medical, and IoT applications.
The NCP161AMX250TBG belongs to onsemi's ultra-low-noise LDO family designed specifically for RF and high-fidelity analog circuits where power-supply-induced distortion must be minimized.
FAQ
What is the maximum input voltage for the NCP161AMX250TBG?
The NCP161AMX250TBG supports an absolute maximum input voltage of 6 V. Its recommended operating range is 1.9 V to 5.5 V. Exceeding 6 V risks permanent damage per Absolute Maximum Ratings. For reliable 2.5 V output, minimum input is 2.69 V (2.5 V + 190 mV dropout), making it ideal for single-cell Li-ion systems.
Does the NCP161AMX250TBG include active output discharge?
Yes, the NCP161AMX250TBG includes active output discharge. When the EN pin is pulled below 0.4 V, an internal 280 Ω resistor pulls the OUT pin to GND, discharging external capacitors rapidly. This feature is confirmed in the datasheet's "PIN FUNCTION DESCRIPTION" and "APPLICATIONS INFORMATION" sections for Version A devices like NCP161AMX250TBG.
What ceramic capacitor values are required for stable operation of the NCP161AMX250TBG?
The NCP161AMX250TBG is stable with 1 µF X7R or X5R ceramic capacitors on both IN and OUT pins. The datasheet confirms stability down to 0.7 µF effective capacitance, accounting for DC bias and temperature effects. Tantalum capacitors are explicitly discouraged due to high ESR and temperature sensitivity.
How does thermal performance differ between the XDFN4 and WLCSP4 packages of the NCP161 series?
The NCP161AMX250TBG in XDFN4 package has a junction-to-ambient thermal resistance (RJA) of 198.1 °C/W, versus 108 °C/W for the WLCSP4 variant. This means the XDFN4 runs hotter under identical conditions but offers superior mechanical robustness and reworkability. Both packages support full 450 mA operation with adequate PCB copper area.
Is the NCP161AMX250TBG pin-compatible with other NCP161 variants in XDFN4?
Yes, all NCP161 XDFN4 variants - including NCP161AMX180TBG, NCP161AMX280TBG, and NCP161AMX330TBG - share identical pinout (IN, GND, EN, OUT), footprint, and thermal pad layout. Only the output voltage and marking code differ, enabling voltage-scaling flexibility without PCB redesign.
NCP161AMX250TBG 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):
- 0.315V @ 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-XDFN (1x1)
NCP161AMX250TBG FAQ
1.How can I place an order for NCP161AMX250TBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP161AMX250TBG 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 NCP161AMX250TBG reliable?
The price and inventory of NCP161AMX250TBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP161AMX250TBG is usually 5 days.
3.What payment methods are accepted for NCP161AMX250TBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP161AMX250TBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP161AMX250TBG?
NCP161AMX250TBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP161AMX250TBG 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 NCP161AMX250TBG?
For technical support, including NCP161AMX250TBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP161AMX250TBG requirements.
6.How does Aetrix verify that NCP161AMX250TBG is sourced from the original manufacturer or authorized distributors?
All NCP161AMX250TBG 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 NCP161AMX250TBG meets industry standards.
7.What is the process for return or replacement of NCP161AMX250TBG?
All NCP161AMX250TBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP161AMX250TBG, 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 NCP161AMX250TBG part is unused and in its original packaging.
Return procedure for NCP161AMX250TBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCP161AMX250TBG 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…
