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onsemi NCP161AMX500TBG
- Part No.:
- NCP161AMX500TBG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP161AMX500TBG.pdf
- Description:
- IC REG LINEAR 5V 450MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,370
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Product details
Overview
NCP161AMX500TBG from onsemi is a 450 mA ultra-low-noise, high-PSRR LDO regulator with fixed 5.0 V output, designed for RF and analog circuits requiring clean power. It delivers ±2% output accuracy over load/temperature, 150 mV dropout at 450 mA, 98 dB PSRR at 1 kHz, and 10 µVRMS output noise - enabling stable biasing in smartphone RF front-ends and camera sensor modules.
For engineers reviewing the NCP161AMX500TBG datasheet, pinout, applications, or equivalent options, key selection criteria include its 1.9–5.5 V input range, active discharge capability (Version A), XDFN4 1 mm × 1 mm package, and compatibility with 1 µF ceramic input/output capacitors in space-constrained portable designs.
Technical Context
The NCP161AMX500TBG uses a PMOS pass transistor architecture to achieve low dropout and reverse-current immunity. Its bandgap reference and integrated soft-start ensure precise regulation and controlled turn-on transients under varying load conditions.
It features active discharge (enabled when EN < 0.4 V), thermal shutdown at 160°C, and current limiting at 700 mA typ. The device operates across −40°C to +125°C junction temperature and maintains stability with 0.7–10 µF ceramic output capacitors and ESR < 2 Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2% - ensures accurate bias for 5 V-tolerant RF ICs and analog signal chains without external feedback. |
| Max Output Current | 450 mA - supports moderate-power RF power amplifiers and multi-rail sensor subsystems. |
| Dropout Voltage | 105 mV typ. at 450 mA - enables operation from 5.1 V input (e.g., Li-ion battery at 80% SOC) while maintaining regulation. |
| PSRR | 98 dB @ 1 kHz - suppresses switching noise from adjacent DC-DC converters in mixed-signal SoC power domains. |
| Output Noise | 10 µVRMS (10 Hz–100 kHz) - meets stringent phase-noise requirements for local oscillator supply rails. |
| Quiescent Current | 18 µA typ. - extends battery life in always-on receiver stages and low-power standby modes. |
| Enable Threshold | VENH = 1.2 V, VENL = 0.4 V - compatible with standard GPIO logic levels for host-controlled power sequencing. |
Pinout & Package
XDFN4 package: 1 mm × 1 mm × 0.4 mm, exposed pad (EPAD) tied to GND for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 1.9–5.5 V; requires 1 µF ceramic capacitor placed adjacent to minimize trace inductance. |
| OUT | Regulated output | Delivers stable 5.0 V; must be bypassed with 1 µF ceramic capacitor near the pin for transient response. |
| EN | Enable control | 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 dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise | 10 µVRMS output noise enables use in LNA and VCO supply rails without degrading SNR or phase jitter. |
| High PSRR | 98 dB at 1 kHz suppresses ripple from noisy buck converters feeding baseband processors or memory interfaces. |
| Active output discharge | 280 Ω internal resistor pulls OUT to GND during disable, preventing floating voltages in multi-rail power-down sequences. |
| Stable with small ceramics | Guaranteed stability with ≥0.7 µF X7R/X5R MLCCs - eliminates need for larger, higher-ESR tantalum or electrolytic capacitors. |
| Thermal protection | 160°C shutdown with 140°C hysteresis prevents damage during sustained overload or poor PCB thermal design. |
Applications
| Smartphone RF Front-End | Wi-Fi 6/6E Transceiver Bias |
|---|---|
|
Use Scenario: Powering PA driver stages and RF switches in LTE/5G handset front-end modules. IC Role / Device Role / Timing Role: Low-noise 5.0 V bias rail for GaAs PAs and SOI switches requiring minimal supply-induced AM-to-PM distortion. Use Value: 10 µVRMS noise and 98 dB PSRR prevent degradation of EVM and ACLR in high-order QAM transmissions. |
Use Scenario: Supplying 5 GHz and 6 GHz Wi-Fi transceivers in compact access points and mobile hotspots. IC Role / Device Role / Timing Role: Clean 5.0 V source for RF synthesizers and ADC/DAC reference buffers in dual-band concurrent operation. Use Value: 150 mV dropout allows direct regulation from single-cell Li-ion (4.2 V → 5.0 V) without intermediate buck stage. |
| Industrial Camera Sensor Module | Medical Ultrasound Beamformer |
|
Use Scenario: Providing regulated 5.0 V to CMOS image sensors and analog front-ends in machine vision cameras. IC Role / Device Role / Timing Role: Low-noise analog supply for pixel readout circuitry and column amplifiers to minimize fixed-pattern noise. Use Value: ±2% accuracy over −40°C to +85°C ensures consistent ADC reference scaling across environmental operating ranges. |
Use Scenario: Biasing high-speed DACs and time-delay ICs in portable ultrasound beamforming ASICs. IC Role / Device Role / Timing Role: Ultra-stable 5.0 V rail for precision timing generation and analog signal conditioning paths. Use Value: 18 µA quiescent current and active discharge support rapid system wake/sleep transitions required in battery-powered diagnostic devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B502MR-G | 500 mA output, 120 mV dropout at 500 mA, no active discharge, SOT-25 package (2.9 × 2.8 mm). | Larger footprint; lacks active discharge and same PSRR/noise performance at 5 V output. | Choose when board space permits larger package and active discharge is not required for system-level sequencing. |
| Richtek RT9080AL-50PUF | 500 mA output, 110 mV dropout at 500 mA, 25 µVRMS noise, no active discharge, DFN-4 (1.0 × 1.0 mm). | Higher noise (2.5×), no active discharge, but offers lower dropout and same footprint. | Choose when lowest possible dropout is critical and noise sensitivity is moderate (e.g., digital I/O rails). |
Compared with Torex XC6210B502MR-G and Richtek RT9080AL-50PUF, the NCP161AMX500TBG uniquely combines 5.0 V fixed output, 10 µVRMS noise, active discharge, and XDFN4 footprint - making it optimal for RF/analog systems where spectral purity and fast power-state transitions are mandatory.
Availability
NCP161AMX500TBG is available at Aetrix Electronics and suitable for smartphone RF modules, Wi-Fi 6E transceivers, and industrial camera sensor designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP161AMX500TBG 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 NCP161AMX500TBG belongs to onsemi's high-performance analog LDO family, engineered specifically for RF and precision analog circuits demanding ultra-low noise, high PSRR, and minimal footprint in battery-powered portable electronics.
FAQ
What is the maximum input voltage rating for the NCP161AMX500TBG?
The NCP161AMX500TBG has an absolute maximum input voltage of 6 V. Operation above 5.5 V is outside the recommended operating range and may compromise reliability or regulation accuracy. For sustained 5.0 V output, VIN should remain between 1.9 V and 5.5 V per datasheet specifications.
Does the NCP161AMX500TBG support active output discharge, and how does it function?
Yes, the NCP161AMX500TBG (Version A) supports active output discharge. When the EN pin voltage falls below 0.4 V, the internal 280 Ω discharge resistor connects OUT to GND, rapidly discharging the output capacitor. This prevents floating voltages during power-down and ensures predictable reset behavior in multi-rail systems.
Can the NCP161AMX500TBG operate with only a 1 µF output capacitor, and what type is recommended?
Yes, the NCP161AMX500TBG is fully stable with a single 1 µF X7R or X5R ceramic capacitor on the output. These dielectrics maintain capacitance across temperature and DC bias. Tantalum capacitors are not recommended due to high ESR (>2 Ω limit) and temperature-dependent impedance.
What is the thermal resistance (RJA) of the NCP161AMX500TBG in its XDFN4 package?
The NCP161AMX500TBG in XDFN4 package has a typical junction-to-ambient thermal resistance (RJA) of 198.1°C/W when mounted on a JEDEC-standard test board with 1 oz copper. Performance improves significantly with larger PCB copper area and proper EPAD grounding - e.g., RJA drops to ~150°C/W with 200 mm² copper pour.
How does the NCP161AMX500TBG handle short-circuit conditions?
The NCP161AMX500TBG limits output current to 690 mA (typ.) during a short circuit (VOUT = 0 V) and provides unlimited short-circuit duration protection. If junction temperature exceeds 160°C, thermal shutdown disables the device until temperature falls below 140°C, preventing permanent damage.
NCP161AMX500TBG 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):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.19V @ 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)
NCP161AMX500TBG FAQ
1.How can I place an order for NCP161AMX500TBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP161AMX500TBG 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 NCP161AMX500TBG reliable?
The price and inventory of NCP161AMX500TBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP161AMX500TBG is usually 5 days.
3.What payment methods are accepted for NCP161AMX500TBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP161AMX500TBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP161AMX500TBG?
NCP161AMX500TBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP161AMX500TBG 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 NCP161AMX500TBG?
For technical support, including NCP161AMX500TBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP161AMX500TBG requirements.
6.How does Aetrix verify that NCP161AMX500TBG is sourced from the original manufacturer or authorized distributors?
All NCP161AMX500TBG 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 NCP161AMX500TBG meets industry standards.
7.What is the process for return or replacement of NCP161AMX500TBG?
All NCP161AMX500TBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP161AMX500TBG, 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 NCP161AMX500TBG part is unused and in its original packaging.
Return procedure for NCP161AMX500TBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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