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onsemi NCP161AMX350TBG
- Part No.:
- NCP161AMX350TBG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP161AMX350TBG.pdf
- Description:
- IC REG LINEAR 3.5V 450MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,655
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Product details
Overview
NCP161AMX350TBG from onsemi is a 450 mA ultra-low-noise, high-PSRR LDO regulator with fixed 3.5 V output, designed for RF and analog circuits requiring stable low-noise biasing. It delivers ±2% output accuracy over load/temperature, 150 mV dropout at 450 mA, 10 µVRMS output noise (10 Hz–100 kHz), and 98 dB PSRR at 1 kHz - enabling clean power in smartphones, wireless LAN modules, and camera sensor rails.
For engineers reviewing the NCP161AMX350TBG 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 NCP161AMX350TBG employs a PMOS pass transistor architecture to achieve 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) and standby current (0.01 µA).
It integrates active discharge (280 Ω pull-down resistor when disabled), thermal shutdown (160 °C trip, 140 °C reset), and current limiting (700 mA typ). Stability is guaranteed with ≥0.7 µF ceramic output capacitors (X5R/X7R), and no ESR requirement simplifies layout for space-constrained RF front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.5 V ±2% - eliminates external feedback network; supports precise biasing of RF amplifiers and ADC references. |
| Max Output Current | 450 mA - sufficient for powering multiple RF ICs or high-speed analog signal chains without derating. |
| Dropout Voltage | 150 mV at 450 mA - enables operation from 3.65 V input (e.g., single Li-ion cell + margin), minimizing power loss. |
| Output Noise | 10 µVRMS (10 Hz–100 kHz) - critical for preserving SNR in RF receivers and high-resolution audio paths. |
| PSRR | 98 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters feeding noisy system rails. |
| Quiescent Current | 18 µA typical - extends battery life in always-on sensor nodes and standby modes of mobile devices. |
| Enable Threshold | VENH = 1.2 V, VENL = 0.4 V - compatible with standard GPIOs and allows direct tie-to-IN if enable not required. |
Pinout & Package
XDFN4 package (Case 711AJ): 1 mm × 1 mm × 0.4 mm, exposed pad (EPAD) for thermal enhancement, RoHS-compliant Pb-free construction.
| 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 3.5 V; must be bypassed with ≥1 µF X5R/X7R ceramic capacitor near the 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 management. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise | 10 µVRMS output noise enables use in RF receiver LNA and PLL VCO supply rails without degrading phase noise. |
| High PSRR | 98 dB at 1 kHz suppresses ripple from buck converters sharing the same battery source, reducing need for additional filtering. |
| Active output discharge | 280 Ω internal pull-down discharges output within milliseconds upon disable - prevents floating voltages in multi-rail sequencing. |
| Thermal protection | 160 °C shutdown with 20 °C hysteresis ensures safe operation during sustained high-load or poor heatsinking conditions. |
| Stable with small ceramics | Guaranteed stability with ≥0.7 µF MLCC output capacitors - supports 0201/0402 footprints for ultra-compact layouts. |
Applications
| Smartphone RF Front-End | Wi-Fi 6/6E Transceiver Bias |
|---|---|
|
Use Scenario: Powering LTE/5G PA drivers and LNA stages in compact smartphone PCBs with tight thermal and noise budgets. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO supplying clean 3.5 V bias to RF power amplifier modules. Use Value: 10 µVRMS noise and 98 dB PSRR prevent AM-to-PM distortion and maintain EVM compliance under dynamic load. |
Use Scenario: Providing regulated 3.5 V to Wi-Fi 6E transceivers operating in 5–6 GHz bands where supply noise directly impacts error vector magnitude. IC Role / Device Role / Timing Role: Primary analog rail regulator for RFIC digital core and analog front-end blocks. Use Value: 150 mV dropout allows operation from shared 3.8 V system rail; 120 µs turn-on supports fast wake-from-sleep protocols. |
| Industrial Camera Sensor Rail | Medical Ultrasound Analog Signal Chain |
|
Use Scenario: Supplying image sensor analog cores (e.g., CMOS global shutter arrays) requiring sub-20 µV noise and fast transient response. IC Role / Device Role / Timing Role: Dedicated low-noise LDO for sensor analog supply, decoupled from noisy digital domains. Use Value: ±2% accuracy over −40°C to +125°C ensures consistent pixel response across environmental extremes. |
Use Scenario: Biasing ultrasound receive-path amplifiers and ADC drivers where supply-induced noise corrupts µV-level echo signals. IC Role / Device Role / Timing Role: Ultra-low-noise 3.5 V source for precision analog signal conditioning before digitization. Use Value: 10 µVRMS noise floor preserves dynamic range; 40 mV load transient excursion avoids clipping during beamforming bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B352MR-G | 350 mA max output, 250 mV dropout at 350 mA, 12 µVRMS noise, no active discharge | Lacks active discharge and thermal shutdown; lower current rating limits use in multi-channel RF systems | Select when board space permits larger dropout margin and discharge is handled externally. |
| Richtek RT9080AL-35PU5 | 500 mA max output, 200 mV dropout at 500 mA, 15 µVRMS noise, 1.2 µA quiescent current | Higher IQ but higher noise; no integrated thermal shutdown; different pinout (SOT23-5) | Prefer for ultra-low-power always-on sensors where 15 µV noise is acceptable and thermal monitoring is external. |
Compared with XC6210B352MR-G and RT9080AL-35PU5, the NCP161AMX350TBG uniquely combines 450 mA capability, 10 µVRMS noise, active discharge, and thermal protection in a 1 mm × 1 mm XDFN4 package - making it optimal for space-constrained, noise-sensitive RF/analog designs requiring full fault coverage.
Availability
NCP161AMX350TBG is available at Aetrix Electronics and suitable for smartphone RF front-ends, Wi-Fi 6E transceiver biasing, and industrial camera sensor rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP161AMX350TBG 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 electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
The NCP161AMX350TBG belongs to onsemi's ultra-low-noise LDO family, engineered specifically for RF and high-performance analog circuits where power integrity directly impacts signal fidelity and system-level RF metrics.
FAQ
What is the maximum input voltage for the NCP161AMX350TBG?
The NCP161AMX350TBG supports an absolute maximum input voltage of 6 V. Its recommended operating input range is 1.9 V to 5.5 V. Exceeding 6 V may cause permanent damage. For reliable 3.5 V output, minimum input is 3.65 V (accounting for 150 mV dropout at full load), making it ideal for single-cell Li-ion or regulated 3.8 V system rails.
Does the NCP161AMX350TBG require an external output capacitor, and what type is recommended?
Yes, the NCP161AMX350TBG requires an external output capacitor. A minimum of 1 µF X5R or X7R ceramic capacitor is recommended and must be placed adjacent to the OUT pin. The device remains stable down to 0.7 µF effective capacitance, accommodating DC-bias derating of small-case MLCCs. Tantalum capacitors are not recommended due to high ESR and temperature sensitivity.
How does the enable pin (EN) function on the NCP161AMX350TBG?
The EN pin on the NCP161AMX350TBG is active-high: applying >1.2 V enables regulation, while <0.4 V disables the output and activates the 280 Ω internal discharge path to GND. An internal 200 nA pull-down ensures default-off behavior when unconnected. If enable functionality is unnecessary, EN may be tied directly to IN for always-on operation.
What thermal performance can be expected from the NCP161AMX350TBG in its XDFN4 package?
In the XDFN4 package (Case 711AJ), the NCP161AMX350TBG has a junction-to-ambient thermal resistance (RJA) of 198.1 °C/W under JEDEC-standard board conditions. With proper PCB copper area (≥200 mm² 1 oz Cu connected to EPAD), power dissipation up to ~350 mW is sustainable at 25 °C ambient. Thermal shutdown activates at 160 °C junction temperature, resetting at 140 °C.
Is the NCP161AMX350TBG suitable for battery-powered applications with strict quiescent current requirements?
Yes - the NCP161AMX350TBG draws only 18 µA typical quiescent current and just 0.01 µA (10 nA) in shutdown mode. This enables multi-week standby in portable devices. Its low dropout (150 mV) also maximizes usable battery voltage range, extending runtime in Li-ion and coin-cell applications where every millivolt matters.
NCP161AMX350TBG 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):
- 3.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.255V @ 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)
NCP161AMX350TBG FAQ
1.How can I place an order for NCP161AMX350TBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP161AMX350TBG 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 NCP161AMX350TBG reliable?
The price and inventory of NCP161AMX350TBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP161AMX350TBG is usually 5 days.
3.What payment methods are accepted for NCP161AMX350TBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP161AMX350TBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP161AMX350TBG?
NCP161AMX350TBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP161AMX350TBG 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 NCP161AMX350TBG?
For technical support, including NCP161AMX350TBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP161AMX350TBG requirements.
6.How does Aetrix verify that NCP161AMX350TBG is sourced from the original manufacturer or authorized distributors?
All NCP161AMX350TBG 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 NCP161AMX350TBG meets industry standards.
7.What is the process for return or replacement of NCP161AMX350TBG?
All NCP161AMX350TBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP161AMX350TBG, 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 NCP161AMX350TBG part is unused and in its original packaging.
Return procedure for NCP161AMX350TBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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