My Inquiry
My Account
onsemi NCP161AMX450TBG
- Part No.:
- NCP161AMX450TBG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP161AMX450TBG.pdf
- Description:
- IC REG LINEAR 4.5V 450MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,879
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NCP161AMX450TBG from onsemi is a 450 mA ultra-low-noise, high-PSRR LDO regulator with 4.5 V fixed output voltage, 150 mV dropout at full load, ±2% output accuracy over load/temperature, and 10 µVRMS integrated noise (10 Hz–100 kHz). It serves as a clean power source for RF transceivers and precision analog circuitry in space-constrained portable devices.
For engineers reviewing the NCP161AMX450TBG datasheet, pinout, applications, or equivalent options, this page delivers verified package mapping (XDFN4), 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 NCP161AMX450TBG employs a PMOS pass transistor architecture enabling low dropout and inherent reverse-current blocking. Its bandgap reference and integrated soft-start ensure stable regulation under fast load transients while maintaining ultra-low quiescent current (18 µA typical).
Designed specifically for RF/analog co-location, it achieves 98 dB PSRR at 1 kHz and remains stable with only 1 µF ceramic output capacitance-no ESR requirement-making it compatible with 0201/0402 MLCCs and eliminating need for bulk tantalum capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.5 V ±2% - eliminates external feedback network; supports direct powering of RF power amplifiers and ADC reference supplies. |
| Max Output Current | 450 mA - sufficient for multi-rail RF front-end ICs and high-speed analog signal chains without thermal derating in XDFN4 package. |
| Dropout Voltage | 150 mV at 450 mA - enables operation from 4.65 V input (e.g., single-cell Li-ion with aging margin) while sustaining full load. |
| PSRR | 98 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters, critical for LTE/Wi-Fi receiver sensitivity. |
| Output Noise | 10 µVRMS (10 Hz–100 kHz) - meets stringent phase-noise requirements for local oscillator supply rails in transceivers. |
| Quiescent Current | 18 µA typical - extends battery life in always-on sensor nodes and standby modes of mobile SoCs. |
| Enable Threshold | VENH = 1.2 V, VENL = 0.4 V - compatible with standard GPIOs and allows direct control from 1.8 V or 3.3 V microcontrollers. |
Pinout & Package
XDFN4 package (1 mm × 1 mm × 0.4 mm, Case 711AJ), thermally enhanced with exposed pad tied to GND for optimal power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 1.9–5.5 V input; requires 1 µF ceramic capacitor placed adjacent to minimize trace inductance. |
| 2 (GND) | Ground reference | Common return path; must be connected to PCB ground plane and tied to exposed pad for thermal and noise 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 (Version A). |
| 4 (OUT) | Regulated output | Delivers stable 4.5 V; bypassed with 1 µF ceramic capacitor; no ESR requirement ensures compatibility with small-case MLCCs. |
| EPAD | Thermal & electrical ground | Exposed pad must be soldered to solid GND copper area to achieve RJA = 198.1 °C/W and prevent thermal shutdown during sustained 450 mA load. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise | 10 µVRMS (10 Hz–100 kHz) - preserves SNR in RF receivers and high-resolution ADCs without additional filtering. |
| High PSRR | 98 dB @ 1 kHz - rejects ripple from buck converters sharing same battery rail, reducing need for cascaded filtering stages. |
| Low dropout | 150 mV @ 450 mA - maintains regulation down to 4.65 V input, supporting legacy 5 V systems and aged Li-ion cells. |
| Active output discharge | 280 Ω internal pull-down (Version A) - ensures rapid VOUT decay on disable, preventing back-powering of downstream circuits. |
| Stable with 1 µF ceramic | No minimum ESR required - enables use of compact 0201/0402 MLCCs, reducing board area and cost vs. traditional LDOs. |
Applications
| 5G NR Front-End Module Power | Wi-Fi 6/6E Transceiver Bias Rail |
|---|---|
|
Use Scenario: Supplying bias voltage to GaAs pHEMT power amplifiers and LNAs in sub-6 GHz 5G handsets. IC Role / Device Role / Timing Role: Clean, low-noise 4.5 V rail isolating RF PA from noisy system DC-DC converters. Use Value: 98 dB PSRR prevents AM-to-PM distortion; 10 µVRMS noise avoids degradation of EVM and ACLR performance. |
Use Scenario: Providing regulated voltage to Wi-Fi 6E transceiver ICs operating in 5.925–7.125 GHz unlicensed bands. IC Role / Device Role / Timing Role: Dedicated LDO for RF synthesizer VCO and mixer core, minimizing phase noise coupling. Use Value: 150 mV dropout enables efficient use of shared 5 V bus; 120 µs turn-on supports fast channel-hopping protocols. |
| Industrial IoT Sensor Node Core Supply | Automotive Camera Module Analog Front-End |
|
Use Scenario: Powering ultra-low-power ARM Cortex-M MCUs and precision SAR ADCs in battery-operated condition monitoring sensors. IC Role / Device Role / Timing Role: Primary 4.5 V supply for MCU core and analog subsystem, enabling <18 µA sleep current. Use Value: 18 µA quiescent current extends 10-year battery life; ±2% accuracy ensures consistent ADC reference scaling across temperature. |
Use Scenario: Delivering stable 4.5 V to high-speed image signal processors (ISPs) and analog video drivers in ADAS cameras. IC Role / Device Role / Timing Role: Low-noise bias for CCD/CMOS sensor analog chains and high-fidelity video DACs. Use Value: 10 µVRMS noise prevents fixed-pattern noise in captured imagery; thermal shutdown (160°C) protects against enclosure overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B452MR-G | 450 mA, 4.5 V fixed, 250 mV dropout @ 450 mA, 25 µVRMS noise, SOT-25 package (2.9 × 2.8 mm) | Higher dropout and noise; larger footprint limits use in ultra-compact RF modules | Select when board space permits larger package and PSRR >90 dB is not required. |
| Richtek RT9080-45GB | 500 mA, 4.5 V fixed, 200 mV dropout @ 500 mA, 15 µVRMS noise, DFN-6 (2 × 2 mm) | Wider package, higher quiescent current (25 µA), no active discharge | Choose for higher current headroom where active discharge is unnecessary and 2 × 2 mm layout is acceptable. |
Compared with XC6210B452MR-G and RT9080-45GB, the NCP161AMX450TBG delivers superior noise/PSRR performance in the smallest footprint (1 mm²), enabling integration into antenna module edge space where thermal and EMI constraints are most severe.
Availability
NCP161AMX450TBG is available at Aetrix Electronics and suitable for 5G front-end modules, Wi-Fi 6E transceivers, and industrial IoT sensor nodes requiring stable component supply with guaranteed long-term continuity.
Supply support for NCP161AMX450TBG 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 delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP161AMX450TBG belongs to onsemi's high-performance analog power management portfolio, engineered specifically for noise-sensitive RF and mixed-signal systems where PSRR, dropout, and footprint are critical design constraints.
FAQ
What is the maximum input voltage rating for the NCP161AMX450TBG?
The NCP161AMX450TBG has an absolute maximum input voltage rating of 6 V. Operation above 5.5 V violates the recommended operating conditions and risks permanent damage. For reliable 4.5 V output, the input should be maintained between 4.65 V (to satisfy 150 mV dropout) and 5.5 V per datasheet specifications.
Does the NCP161AMX450TBG include active output discharge functionality?
Yes, the NCP161AMX450TBG (Version A, indicated by 'A' prefix in part number) includes active output discharge with a 280 Ω internal pull-down resistor activated when EN ≤ 0.4 V. This ensures rapid VOUT decay to GND, preventing back-powering of downstream circuitry during power-down sequences.
What ceramic capacitor dielectric is recommended for the NCP161AMX450TBG output?
X7R or X5R dielectric 1 µF ceramic capacitors are recommended for the NCP161AMX450TBG output. These offer stable capacitance over temperature and DC bias, ensuring consistent transient response and stability. Avoid Y5V or Z5U due to excessive capacitance loss at bias voltage.
Can the NCP161AMX450TBG operate with zero-load current?
Yes, the NCP161AMX450TBG is fully functional at zero load. Its quiescent current remains at 18 µA typical across the full input range (1.9–5.5 V), and output voltage accuracy is maintained within ±2% even with IOUT = 0 mA, making it ideal for always-on sensor bias applications.
Is thermal shutdown protection implemented in the NCP161AMX450TBG?
Yes, the NCP161AMX450TBG integrates thermal shutdown with a trip threshold of 160°C (typical) and hysteresis reset at 140°C (typical). This protection disables the output until junction temperature falls below the reset point, safeguarding the device during sustained overload or poor PCB thermal design.
NCP161AMX450TBG 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):
- 4.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.21V @ 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)
NCP161AMX450TBG FAQ
1.How can I place an order for NCP161AMX450TBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP161AMX450TBG 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 NCP161AMX450TBG reliable?
The price and inventory of NCP161AMX450TBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP161AMX450TBG is usually 5 days.
3.What payment methods are accepted for NCP161AMX450TBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP161AMX450TBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP161AMX450TBG?
NCP161AMX450TBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP161AMX450TBG 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 NCP161AMX450TBG?
For technical support, including NCP161AMX450TBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP161AMX450TBG requirements.
6.How does Aetrix verify that NCP161AMX450TBG is sourced from the original manufacturer or authorized distributors?
All NCP161AMX450TBG 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 NCP161AMX450TBG meets industry standards.
7.What is the process for return or replacement of NCP161AMX450TBG?
All NCP161AMX450TBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP161AMX450TBG, 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 NCP161AMX450TBG part is unused and in its original packaging.
Return procedure for NCP161AMX450TBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCP161AMX450TBG 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…
