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onsemi NCP508MT30TBG
- Part No.:
- NCP508MT30TBG
- Manufacturer:
- onsemi
- Package:
- 6-WFDFN
- Datasheet:
-
NCP508MT30TBG.pdf
- Description:
- IC REG LINEAR 3V 50MA 6WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,166
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Product details
Overview
NCP508MT30TBG from onsemi is a 50 mA, 3.0 V fixed-output low dropout (LDO) voltage regulator in WDFN6 1.5×1.5 mm package, featuring 140 mV typical dropout at 30 mA, 70 dB ripple rejection at 1 kHz, and 39 µVRMS output noise (100 Hz–100 kHz). It delivers stable power to noise-sensitive RF subsystems and precision analog circuitry.
For engineers reviewing the NCP508MT30TBG datasheet, pinout, applications, or equivalent options, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options for low-noise 3.0 V LDO replacement in space-constrained designs.
Technical Context
The NCP508MT30TBG integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection. Its architecture enables fast 20 µs enable turn-on and stable operation with ceramic capacitors as low as 1.0 µF.
Designed for ultra-low-noise operation without bypass capacitor, it achieves 39 µVRMS noise and maintains 70 dB AC ripple rejection up to 1 kHz-critical for powering VCOs, PLLs, and RF front-ends where supply-induced phase noise degrades system performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±2% (25°C), ±3% (−40°C to +85°C); ensures stable bias for 3.0 V logic and analog rails. |
| Max Output Current | 50 mA continuous; sufficient for RF transceivers, sensor signal chains, and low-power microcontrollers. |
| Dropout Voltage | 140 mV (typ) at 30 mA; allows regulation from 3.14 V input, enabling use with single-cell Li-ion or 3.3 V pre-regulated supplies. |
| Ripple Rejection | 70 dB at 1 kHz; suppresses switching noise from upstream DC/DC converters feeding sensitive analog blocks. |
| Output Noise | 39 µVRMS (100 Hz–100 kHz); eliminates need for external noise-filtering components in VCO/PLL power domains. |
| Enable Threshold | Logic-compatible: turns on when Enable ≥ 0.9 V, off when ≤ 0.15 V; supports direct GPIO control without level-shifting. |
| Operating Temp | −40°C to +85°C ambient; qualified for industrial and portable consumer applications including handsets and IoT edge nodes. |
Pinout & Package
Package: WDFN6 (1.5 mm × 1.5 mm, 0.5 mm pitch, exposed thermal pad), Pb-free, moisture sensitivity level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Input supply connection; accepts up to 7.0 V max operating input; requires local 1.0 µF ceramic decoupling. |
| 2 | GND | Power ground reference; must be connected to low-impedance PCB ground plane for noise and thermal performance. |
| 3 | Enable | Active-high logic control; pulls device into standby (<0.1 µA IQ) when low; tie to Vin if always-on operation required. |
| 4 | Vout | Regulated 3.0 V output; stable with 1.0 µF ceramic capacitor; ESR tolerance up to 3 Ω enables flexible capacitor selection. |
| 5 | NC | No-connect terminal; internally unconnected; must remain floating or grounded per layout best practice (not tied to signal nets). |
| 6 | Exposed Pad | Thermal and electrical ground; soldered to PCB copper pour to achieve RJA = 313°C/W and sustain full 50 mA load at +85°C. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 39 µVRMS without bypass cap-enables direct powering of VCOs and PLLs without added filtering. |
| Fast enable response | 20 µs turn-on time (10% to 95% Vout) supports dynamic power sequencing in battery-powered systems. |
| Ceramic-capacitor stability | Stable with 1.0 µF MLCCs (ESR 0.5–3 Ω); eliminates need for tantalum or electrolytic capacitors, reducing BOM cost and footprint. |
| Low quiescent current | 0.1 µA (typ) in shutdown; extends battery life in always-on sensor nodes and wearable devices. |
| Robust protection | Integrated thermal shutdown (125°C trip), current limit (~250 mA short-circuit), and ESD >2 kV HBM ensure field reliability. |
Applications
| RF Handset Power | VCO/PLL Bias Supply |
|---|---|
|
Use Scenario: Powers RF transceiver ICs and PA drivers in 4G/5G mobile handsets where supply noise directly impacts EVM and ACLR. IC Role / Device Role / Timing Role: Primary 3.0 V LDO delivering clean, regulated bias to RF synthesizer and mixer stages. Use Value: 39 µVRMS noise and 70 dB ripple rejection prevent supply-induced phase noise degradation in transmit paths. |
Use Scenario: Supplies voltage-controlled oscillators and phase-locked loops in wireless infrastructure and test equipment. IC Role / Device Role / Timing Role: Low-noise post-regulator for crystal oscillator buffers and fractional-N PLL core circuits. Use Value: Eliminates need for discrete RC filters; maintains jitter <100 fs RMS in clock distribution networks. |
| Industrial Sensor Signal Chain | Wearable Biometric Front-End |
|
Use Scenario: Powers high-resolution ADCs, instrumentation amplifiers, and temperature sensors in factory automation modules. IC Role / Device Role / Timing Role: Precision 3.0 V reference rail for analog signal conditioning prior to digitization. Use Value: Tight ±2% output tolerance and 6 mV load regulation preserve measurement accuracy across 1–50 mA load swings. |
Use Scenario: Delivers regulated 3.0 V to optical heart-rate monitors, ECG analog front-ends, and low-power BLE SoCs. IC Role / Device Role / Timing Role: Always-on or enable-controlled power source for ultra-low-power biometric sensing subsystems. Use Value: 0.1 µA shutdown current and 20 µs wake-up support multi-day battery life in compact wearables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3002E/MB | 300 mA output, 170 mV dropout, 30 µVRMS noise, SOT-23-5 package; higher current but larger footprint and no enable pin. | Suitable for higher-load applications where board area permits SOT-23 and enable control is unnecessary. | Select when >50 mA load or simplified control (no enable) is required; verify thermal derating in WDFN6-replacement layouts. |
| Torex XC6206P302MR-G | 150 mA output, 250 mV dropout, 40 µVRMS noise, SOT-25 package; similar noise but lower PSRR (60 dB @ 1 kHz) and no thermal shutdown. | Fits cost-sensitive consumer designs where moderate ripple rejection suffices and thermal safety margin is managed externally. | Choose for price-driven volume production where 70 dB PSRR and integrated thermal protection are non-critical. |
Compared with MCP1700T-3002E/MB and XC6206P302MR-G, the NCP508MT30TBG offers superior 70 dB ripple rejection and integrated thermal shutdown in a 1.5×1.5 mm WDFN6 package-making it optimal for space-constrained, noise-critical RF and precision analog applications despite its 50 mA limit.
Availability
NCP508MT30TBG is available at Aetrix Electronics and suitable for RF handset design, VCO/PLL biasing, industrial sensor signal chains, and wearable biometric front-ends requiring stable component supply and long-term obsolescence planning.
Supply support for NCP508MT30TBG 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT markets.
The NCP508MT30TBG belongs to the NCP508 family of ultra-low-noise LDO regulators designed specifically for powering noise-sensitive RF and precision analog circuits in portable and space-constrained applications.
FAQ
What is the maximum input voltage rating for the NCP508MT30TBG?
The NCP508MT30TBG has an absolute maximum input voltage (Vin) of 13.0 V, but its recommended operating input voltage is limited to 7.0 V per the datasheet's Recommended Operating Conditions table. Exceeding 7.0 V may not damage the device immediately but risks violating thermal and dropout specifications under load. For reliable 3.0 V regulation, keep Vin between 3.14 V (3.0 V + 140 mV dropout) and 7.0 V.
Does the NCP508MT30TBG require an external bypass capacitor for low-noise operation?
No-the NCP508MT30TBG achieves 39 µVRMS output noise (100 Hz–100 kHz) without any external bypass capacitor, as confirmed in the datasheet's Features section and Electrical Characteristics table. This eliminates BOM cost and PCB area typically needed for noise filtering, though a 1.0 µF ceramic output capacitor remains mandatory for stability and transient response.
Is the NCP508MT30TBG still in active production or marked obsolete?
The NCP508MT30TBG is explicitly marked as discontinued in the official onsemi datasheet (Rev. 6, January 2026), per the "DISCONTINUED" note on page 13 and revision history. However, Aetrix Electronics maintains legacy inventory and offers lifecycle management support-including last-time buy planning, cross-reference assistance, and obsolescence mitigation-for continued use in existing designs.
What is the thermal resistance (RJA) of the NCP508MT30TBG in its WDFN6 package?
The NCP508MT30TBG in WDFN6 package has a thermal resistance of RJA = 313°C/W when mounted on a standard 30 mm × 30 mm PCB with 1 oz copper, as specified in the Maximum Ratings table. This value assumes proper soldering of the exposed thermal pad to a dedicated copper pour; inadequate thermal land design can significantly degrade actual RJA and limit usable output current at elevated ambient temperatures.
Can the NC pin (Pin 5) of the NCP508MT30TBG be connected to ground or left floating?
Pin 5 of the NCP508MT30TBG is a true no-connect (NC) terminal-internally unconnected and electrically isolated. The datasheet's Pin Function Description confirms it carries no circuit function. It may be left floating or tied to GND for mechanical stability or EMI reduction, but must never be connected to Vin, Vout, or any active signal net, as this could compromise package integrity or cause unintended coupling.
NCP508MT30TBG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.18V @ 50mA (Typ)
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- 1.9 mA
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WDFN (1.5x1.5)
NCP508MT30TBG FAQ
1.How can I place an order for NCP508MT30TBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP508MT30TBG 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 NCP508MT30TBG reliable?
The price and inventory of NCP508MT30TBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP508MT30TBG is usually 5 days.
3.What payment methods are accepted for NCP508MT30TBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP508MT30TBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP508MT30TBG?
NCP508MT30TBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP508MT30TBG 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 NCP508MT30TBG?
For technical support, including NCP508MT30TBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP508MT30TBG requirements.
6.How does Aetrix verify that NCP508MT30TBG is sourced from the original manufacturer or authorized distributors?
All NCP508MT30TBG 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 NCP508MT30TBG meets industry standards.
7.What is the process for return or replacement of NCP508MT30TBG?
All NCP508MT30TBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP508MT30TBG, 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 NCP508MT30TBG part is unused and in its original packaging.
Return procedure for NCP508MT30TBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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