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onsemi NCP508MT15TBG
- Part No.:
- NCP508MT15TBG
- Manufacturer:
- onsemi
- Package:
- 6-WFDFN
- Datasheet:
-
NCP508MT15TBG.pdf
- Description:
- IC REG LINEAR 1.5V 50MA 6WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,282
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Product details
Overview
NCP508MT15TBG from onsemi is a 1.5 V, 50 mA low-dropout linear voltage regulator in WDFN6 (1.5×1.5 mm) package, featuring 39 µVRMS output noise, 70 dB ripple rejection at 1 kHz, and 140 mV typical dropout at 30 mA - optimized for RF subsystems and noise-sensitive analog circuits such as VCOs and PLLs.
For engineers reviewing the NCP508MT15TBG datasheet, pinout, applications, or equivalent options, this page delivers verified specifications, validated WDFN6 pin mapping, real-world use cases in RF power management, and two confirmed alternative regulators with documented functional and packaging differences.
Technical Context
The NCP508MT15TBG integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection - enabling fast 20 µs enable turn-on and stable operation with ceramic capacitors as low as 1.0 µF. Its architecture eliminates need for minimum load current and supports ESR from a few mΩ up to 3 Ω.
Designed for battery-powered portable electronics, it operates across −40 °C to +85 °C ambient, accepts input voltages up to 7.0 V, and features logic-level enable with 0.9 V high-threshold and 0.15 V low-threshold - allowing direct interfacing with 1.8 V or 3.3 V microcontrollers without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±2% at 10 mA; tight regulation enables stable biasing of low-voltage RF ICs |
| Max Output Current | 50 mA continuous; sufficient for powering single-channel RF front-end modules or sensor signal chains |
| Dropout Voltage | 140 mV (typ) at 30 mA; allows operation from 1.64 V input - compatible with single Li-ion or dual NiMH cells |
| Noise (100 Hz–100 kHz) | 39 µVRMS without bypass capacitor; eliminates need for external noise-filtering components in VCO supply rails |
| Ripple Rejection | 70 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters feeding mixed-signal systems |
| Enable Threshold | 0.9 V (logic high), 0.15 V (logic low); ensures reliable control from standard GPIOs without pull-up resistors |
| Quiescent Current | 0.1 µA (typ) in shutdown; extends battery life in always-on monitoring applications |
Pinout & Package
Package: WDFN6 (1.5 mm × 1.5 mm, 0.5 mm pitch), thermally enhanced with exposed pad; RoHS-compliant, Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Enable | Active-high digital control input; tie to VIN if always-on operation required |
| 2 | NC | No-connect terminal; must remain unconnected per datasheet |
| 3 | Vout | Regulated 1.5 V output; requires ≥1.0 µF ceramic capacitor placed adjacent to pin |
| 4 | GND | Power ground reference; connects to PCB thermal pad for optimal heat dissipation |
| 5 | NC | No-connect terminal; electrically isolated, no internal connection |
| 6 | Vin | Input supply (≤7.0 V); decoupling capacitor must be placed within 2 mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise regulation | 39 µVRMS output noise without bypass cap - preserves phase noise performance in VCOs and PLLs |
| Fast enable response | 20 µs turn-on time from enable assertion to 95% Vout - supports dynamic power gating in portable devices |
| Ceramic-capacitor compatibility | Stable with 1.0 µF MLCCs and ESR from few mΩ to 3 Ω - reduces BOM count and board space vs. tantalum solutions |
| Thermal & current protection | Internal junction temperature limit (125 °C) and short-circuit current limit (100–250 mA) - prevents damage during fault conditions |
| Pb-free WDFN6 package | 1.5×1.5 mm footprint with exposed thermal pad - enables high-density layouts and improves thermal resistance (RJA = 313 °C/W on 30×30 mm PCB) |
Applications
| RF Handset Power Rails | VCO/PLL Bias Supply |
|---|---|
Use Scenario: Powering RF transceiver ICs in cellular handsets where supply noise directly impacts EVM and ACLR. IC Role / Device Role / Timing Role: Low-noise LDO supplying clean 1.5 V bias to RF power amplifiers and mixer stages. Use Value: 39 µVRMS noise and 70 dB ripple rejection prevent degradation of RF spectral purity under dynamic load conditions. |
Use Scenario: Providing regulated voltage to voltage-controlled oscillators and phase-locked loops in wireless infrastructure. IC Role / Device Role / Timing Role: Precision analog voltage source maintaining VCO tuning line stability and minimizing phase jitter. Use Value: Tight ±2% output tolerance and <6 mV load regulation ensure consistent oscillator center frequency across operating current range. |
| Portable Medical Sensors | Low-Power IoT Edge Nodes |
Use Scenario: Powering ultra-low-power analog front-ends in wearable ECG or pulse oximetry sensors. IC Role / Device Role / Timing Role: Efficient 1.5 V supply enabling sub-µA sleep modes while supporting fast wake-up via enable pin. Use Value: 0.1 µA quiescent current in shutdown and 20 µs turn-on time extend battery life without sacrificing responsiveness. |
Use Scenario: Regulating power for BLE/Wi-Fi SoCs and environmental sensors in battery-operated smart devices. IC Role / Device Role / Timing Role: Primary LDO delivering stable 1.5 V to digital core and RF sections during burst transmission. Use Value: Dropout of 140 mV at 30 mA allows operation down to 1.64 V input - maximizing usable capacity from coin-cell or LiPo batteries. |
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-1502E/TT | 300 mA output, 1.5 V fixed, SOT-23-5 package; higher IOUT but 65 µVRMS noise and 60 dB RR | Better for higher-current digital loads; less suitable for ultra-low-noise RF bias due to higher noise and lower RR | Select when >50 mA load current is required and noise sensitivity is moderate |
| Torex XC6206P152MR-G | 150 mA output, 1.5 V fixed, SOT-25 package; 40 µVRMS noise, 55 dB RR at 1 kHz, no enable pin | Lacks enable control and has lower ripple rejection - unsuitable for dynamically powered RF subsystems | Choose only for simple always-on 1.5 V rails where enable functionality and high RR are not needed |
Compared with MCP1700T-1502E/TT and XC6206P152MR-G, the NCP508MT15TBG uniquely balances ultra-low noise (39 µVRMS), high ripple rejection (70 dB), fast enable (20 µs), and compact WDFN6 packaging - making it the only option among the three qualified for noise-critical RF bias applications requiring dynamic power control.
Availability
NCP508MT15TBG is available at Aetrix Electronics and suitable for RF handset design, portable medical instrumentation, low-power IoT edge nodes, and VCO/PLL biasing requiring stable component supply with full traceability and lifecycle continuity.
Supply support for NCP508MT15TBG 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, sensing, and connectivity solutions for automotive, industrial, and consumer markets.
The NCP508MT15TBG belongs to onsemi's NCP508 family of ultra-low-noise LDOs, engineered specifically for noise-sensitive RF and analog applications where clean, stable, and rapidly controllable voltage rails are essential.
FAQ
What is the maximum input voltage rating for the NCP508MT15TBG?
The NCP508MT15TBG has a maximum input voltage rating of 7.0 V under recommended operating conditions. Exceeding this limit - even briefly - risks permanent damage, as the absolute maximum Vin is 13.0 V but operation above 7.0 V is not guaranteed for reliability or parametric performance. Always maintain Vin ≤7.0 V in designs using NCP508MT15TBG.
Does the NCP508MT15TBG require an external bypass capacitor to achieve its specified 39 µVRMS noise?
No, the NCP508MT15TBG achieves its specified 39 µVRMS output noise (100 Hz–100 kHz) without any external bypass capacitor. This is explicitly stated in the datasheet's Features section and confirmed in Electrical Characteristics - making NCP508MT15TBG suitable for space-constrained RF layouts where adding extra capacitance is impractical.
How is thermal performance affected by PCB layout for the NCP508MT15TBG in its WDFN6 package?
Thermal resistance (RJA) of the NCP508MT15TBG in WDFN6 is 313 °C/W on a standard 30×30 mm PCB with 1 oz copper. Increasing copper area under the exposed pad - especially with thermal vias to inner layers - can reduce RJA significantly; Figure 36 shows RJA drops to ~100 °C/W with 700 mm² copper spread. Proper layout is critical to sustain 50 mA loads at elevated ambient temperatures.
Can the NC pins on the NCP508MT15TBG be grounded or left floating?
The NC pins (pins 2 and 5) on the NCP508MT15TBG must remain unconnected - neither grounded nor tied to any voltage. The datasheet explicitly defines them as "Not connected" with no internal connection; grounding or biasing these pins may cause unpredictable behavior or violate internal isolation boundaries. Always leave both NC pins floating in PCB layout for NCP508MT15TBG.
What is the minimum output capacitance required for stability with the NCP508MT15TBG?
The NCP508MT15TBG requires a minimum output capacitance of 1.0 µF ceramic (MLCC) for guaranteed stability across all operating conditions. The device is designed to remain stable with ESR ranging from a few mΩ up to 3 Ω - unlike many LDOs that demand specific ESR ranges - so standard X5R/X7R MLCCs meet the requirement without additional series resistance.
NCP508MT15TBG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 1.5V
- 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)
NCP508MT15TBG FAQ
1.How can I place an order for NCP508MT15TBG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP508MT15TBG 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 NCP508MT15TBG reliable?
The price and inventory of NCP508MT15TBG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP508MT15TBG is usually 5 days.
3.What payment methods are accepted for NCP508MT15TBG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP508MT15TBG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP508MT15TBG?
NCP508MT15TBG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP508MT15TBG 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 NCP508MT15TBG?
For technical support, including NCP508MT15TBG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP508MT15TBG requirements.
6.How does Aetrix verify that NCP508MT15TBG is sourced from the original manufacturer or authorized distributors?
All NCP508MT15TBG 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 NCP508MT15TBG meets industry standards.
7.What is the process for return or replacement of NCP508MT15TBG?
All NCP508MT15TBG units undergo pre-shipment inspection (PSI). If there is an issue with NCP508MT15TBG, 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 NCP508MT15TBG part is unused and in its original packaging.
Return procedure for NCP508MT15TBG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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