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onsemi NCP703MX28TCG
- Part No.:
- NCP703MX28TCG
- Manufacturer:
- onsemi
- Package:
- 6-XFDFN
- Datasheet:
-
NCP703MX28TCG.pdf
- Description:
- IC REG LINEAR 2.8V 300MA 6XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
NCP703MX28TCG from onsemi is a 300 mA, fixed 2.8 V output ultra-low-noise LDO voltage regulator in XDFN-6 (1.5 × 1.5 mm) package, featuring 12 µA typical quiescent current, 13 µVRMS output noise (100 Hz–100 kHz), and 180 mV typical dropout at 300 mA - designed for powering noise-sensitive RF circuitry such as power amplifiers in satellite radios and infotainment systems.
For engineers reviewing the NCP703MX28TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its ultra-low IQ operation under light load, absence of required external noise-bypass capacitor, ±2% output accuracy over load/line/temperature, active output discharge, and compatibility with 1 µF ceramic output capacitor.
Technical Context
The NCP703MX28TCG employs a PMOS pass transistor architecture enabling low dropout and reverse-current protection via inherent body diode management. Its adaptive ground current control dynamically reduces IQ to 12 µA at no load while maintaining fast transient response.
Internal circuitry includes undervoltage lockout (UVLO) with 1.6 V turn-on threshold and 100 mV hysteresis, thermal shutdown at 160°C with 20°C hysteresis, and internal soft-start limiting inrush current. The EN pin provides logic-level enable/disable with 0.9 V high threshold and 0.4 V low threshold, plus built-in 110 nA pull-down for default-off safety.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2% over load/line/temperature - ensures stable biasing for RF PA stages without external feedback. |
| Max Output Current | 300 mA continuous - supports moderate-power analog/RF loads without thermal derating on standard PCBs. |
| Quiescent Current | 12 µA typical at zero load - extends battery life in always-on portable devices like GPS modules and Bluetooth headsets. |
| Output Noise | 13 µVRMS (100 Hz–100 kHz) - eliminates need for external noise-bypass capacitor, reducing BOM count and board area. |
| PSRR | 68 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding sensitive RF receivers. |
| Dropout Voltage | 180 mV typical at 300 mA - enables operation from single-cell Li-ion (3.0 V min) down to 2.98 V while maintaining regulation. |
| Enable Threshold | 0.9 V (high), 0.4 V (low) - compatible with 1.8 V and 3.3 V GPIOs without level-shifting. |
| Thermal Shutdown | 160°C activation with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
XDFN-6 (1.5 × 1.5 mm, 0.5 mm pitch) package with wettable flank leads for automated optical inspection (AOI). Exposed thermal pad enhances thermal performance (θJA = 146°C/W, θJB = 77°C/W on 1 oz FR4).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input supply connection | Accepts 2.0–5.5 V input; requires ≥1 µF ceramic capacitor close to pin for stability and noise filtering. |
| 2 (EN) | Logic-enable control input | Drives >0.9 V to enable regulator; <0.4 V disables output and activates active discharge (320 Ω to GND). |
| 3 (N/C) | No-connect terminal | Internally unconnected; may be tied to GND to improve thermal dissipation without electrical impact. |
| 4 (OUT) | Regulated output voltage | Delivers 2.8 V ±2%; stable with ≥1 µF X5R/X7R ceramic capacitor; low ESR (<900 mΩ) recommended. |
| 5 (GND) | Power ground reference | Die ground connected to lead frame; soldered to large copper pour for optimal thermal conduction and noise rejection. |
| 6 (N/C) | No-connect terminal | Internally unconnected; electrically isolated; no routing or connection required. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise without bypass cap | 13 µVRMS output noise achieved with only 1 µF COUT, eliminating cost and space penalty of dedicated noise-filter capacitor. |
| Dynamic IQ management | Adaptive ground current drops to 12 µA at no load while preserving full 300 mA capability and transient response. |
| Active output discharge | 320 Ω internal discharge path pulls VOUT to GND within milliseconds after EN deactivation - critical for sequencing in multi-rail systems. |
| Stable with minimal capacitance | Guaranteed stability with 0.1 µF effective COUT, accommodating DC-bias derating of small-case ceramics (e.g., 0402). |
| Robust protection suite | Integrated thermal shutdown (160°C), current limit (~490 mA), short-circuit protection, and UVLO prevent fault propagation in compact portable designs. |
Applications
| Satellite Radio Power Amplifier | Infotainment System Audio Codec |
|---|---|
Use Scenario: Powers RF power amplifier stage in satellite radio receivers where supply ripple directly modulates carrier signal. IC Role / Device Role / Timing Role: Ultra-low-noise LDO providing clean 2.8 V bias to GaAs FET amplifier, replacing noisy switching supplies. Use Value: 13 µVRMS noise and 68 dB PSRR at 1 kHz prevent AM/PM distortion and adjacent-channel interference in narrowband RF bands. | Use Scenario: Supplies analog front-end and DAC/ADC section of automotive infotainment audio subsystem. IC Role / Device Role / Timing Role: Precision voltage source delivering stable 2.8 V to low-noise op-amps and sigma-delta converters. Use Value: ±2% output accuracy and 6 mV load regulation ensure consistent SNR across varying DSP processing loads and temperature ranges. |
| Portable Medical Pulse Oximeter | Bluetooth LE Sensor Node |
Use Scenario: Powers photodiode transimpedance amplifier and analog signal chain in battery-operated pulse oximeters. IC Role / Device Role / Timing Role: Low-quiescent-current LDO sustaining 2.8 V rail during long idle periods between SpO₂ measurements. Use Value: 12 µA IQ extends coin-cell battery life beyond 12 months while maintaining <20 µVRMS noise floor for sub-1% saturation accuracy. | Use Scenario: Supplies BLE SoC RF core and sensor interface in energy-harvesting wireless nodes. IC Role / Device Role / Timing Role: Enable-controlled LDO activated only during transmission bursts to minimize average system current. Use Value: Active discharge clears VOUT in <1 ms after EN deassertion, enabling precise timing control and preventing leakage into sleep-state peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2028PDQNR | 2.8 V fixed, 300 mA, 6.5 µA IQ, 12 µVRMS noise, 0.5-mm-pitch DQN package (1.2 × 1.2 mm) | Lower IQ but smaller footprint; no active discharge; requires 0.47 µF min COUT | Preferred when board space is constrained and active discharge is not required. |
| MCP1700T-2802E/TT | 2.8 V fixed, 250 mA, 1.6 µA IQ, 30 µVRMS noise, SOT-23-5 package | Lower max current and higher noise; no EN pin or thermal shutdown; lacks PSRR spec >40 dB | Only suitable for non-critical, ultra-low-power sensor biasing where noise immunity is secondary. |
Compared with TPS7A2028PDQNR, NCP703MX28TCG offers active discharge and superior PSRR (68 dB vs. 60 dB @1 kHz), making it better for RF/audio; versus MCP1700T-2802E/TT, it delivers 10× lower noise and full protection features essential for medical/automotive use.
Availability
NCP703MX28TCG is available at Aetrix Electronics and suitable for satellite radio, automotive infotainment, and portable medical equipment requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.
Supply support for NCP703MX28TCG 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 focused on energy-efficient electronics for automotive, industrial, cloud, medical, and IoT applications.
The NCP703 series is engineered for ultra-low-noise, ultra-low-IQ power delivery in battery-powered RF and precision analog systems - emphasizing clean regulation without external noise filters and robust protection in miniature packages.
FAQ
What is the output voltage tolerance of the NCP703MX28TCG over temperature and load?
The NCP703MX28TCG maintains ±2% output voltage accuracy across −40°C to +125°C junction temperature, full 0–300 mA load range, and input voltage from VOUT + 0.5 V to 5.5 V. This is verified per Table 4 in the datasheet and ensures reliable biasing for RF PAs and precision ADCs without calibration.
Does the NCP703MX28TCG require an external noise-bypass capacitor?
No, the NCP703MX28TCG achieves 13 µVRMS output noise (100 Hz–100 kHz) without any external noise-bypass capacitor. Its internal design eliminates the need for a dedicated Cnr, reducing BOM count and PCB area - confirmed in the "Features" section and Figure 3–6 of the datasheet.
What is the maximum input voltage rating for the NCP703MX28TCG?
The absolute maximum input voltage for the NCP703MX28TCG is 6 V, as specified in Table 2 ("Absolute Maximum Ratings"). Continuous operation above 5.5 V or below −0.3 V risks permanent damage; recommended operating range is 2.0 V to 5.5 V per Table 4.
How does the enable pin (EN) function on the NCP703MX28TCG?
The EN pin on the NCP703MX28TCG enables logic-level control: driving EN >0.9 V turns on regulation; pulling EN <0.4 V disables output and activates active discharge (320 Ω to GND). An internal 110 nA pull-down ensures safe default-off state if left floating.
Can the NCP703MX28TCG be used with a 1 µF ceramic output capacitor?
Yes - the NCP703MX28TCG is explicitly characterized and guaranteed stable with a 1 µF X5R/X7R ceramic output capacitor (COUT). The datasheet confirms this in "Features", "Typical Application Schematic", and Table 4 test conditions, and notes minimum effective capacitance of 0.1 µF accounts for DC-bias derating.
NCP703MX28TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-XFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 20 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Soft Start, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-XDFN (1.5x1.5)
NCP703MX28TCG FAQ
1.How can I place an order for NCP703MX28TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP703MX28TCG 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 NCP703MX28TCG reliable?
The price and inventory of NCP703MX28TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP703MX28TCG is usually 5 days.
3.What payment methods are accepted for NCP703MX28TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP703MX28TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP703MX28TCG?
NCP703MX28TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP703MX28TCG 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 NCP703MX28TCG?
For technical support, including NCP703MX28TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP703MX28TCG requirements.
6.How does Aetrix verify that NCP703MX28TCG is sourced from the original manufacturer or authorized distributors?
All NCP703MX28TCG 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 NCP703MX28TCG meets industry standards.
7.What is the process for return or replacement of NCP703MX28TCG?
All NCP703MX28TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP703MX28TCG, 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 NCP703MX28TCG part is unused and in its original packaging.
Return procedure for NCP703MX28TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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