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onsemi NCP703MX33TCG
- Part No.:
- NCP703MX33TCG
- Manufacturer:
- onsemi
- Package:
- 6-XFDFN
- Datasheet:
-
NCP703MX33TCG.pdf
- Description:
- IC REG LINEAR 3.3V 300MA 6XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,183
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Product details
Overview
NCP703MX33TCG from onsemi is a 300 mA, fixed 3.3 V ultra-low-noise LDO voltage regulator optimized for noise-sensitive RF and precision analog circuits. It delivers ±2% output accuracy over load/line/temperature, 13 µVRMS output noise (100 Hz–100 kHz), and 68 dB PSRR at 1 kHz - all without requiring an external noise-bypass capacitor. Its 12 µA quiescent current and active output discharge make it ideal for battery-powered satellite radios and portable medical instrumentation.
For engineers reviewing the NCP703MX33TCG datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage (180 mV @ 300 mA), EN pin threshold (0.4 V low / 0.9 V high), thermal shutdown (160°C), and compatibility with 1 µF ceramic output capacitors in space-constrained XDFN-6 layouts.
Technical Context
The NCP703MX33TCG employs a PMOS pass transistor architecture with adaptive ground current control to maintain ultra-low quiescent current across light-load conditions while preserving fast transient response. Its internal soft-start limits inrush current, and integrated active discharge pulls VOUT to GND via a 320 Ω resistor during shutdown.
It features undervoltage lockout (UVLO) with 100 mV hysteresis (1.2–1.9 V trip range), thermal shutdown with 20°C hysteresis (160°C trip / 140°C reset), and output current limiting (typ. 490 mA at 90% VOUT). Stability is guaranteed with 0.1 µF–10 µF X5R/X7R ceramic output capacitors and ESR < 900 mΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2% over full load/line/temperature range - ensures stable rail for RF power amplifiers and ADC references. |
| Max Output Current | 300 mA continuous - supports moderate-power RF front-ends and mixed-signal SoCs without derating. |
| Dropout Voltage | 180 mV typical at 300 mA - enables operation down to VIN = 3.48 V, critical for single-cell Li-ion (3.0–4.2 V) systems. |
| Quiescent Current | 12 µA typical at no load - extends battery life in always-on sensor nodes and GPS receivers. |
| Output Noise | 13 µVRMS (100 Hz–100 kHz) - eliminates need for external noise-filtering capacitors, reducing BOM count and PCB area. |
| PSRR | 68 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters feeding sensitive analog circuitry. |
| Enable Threshold | 0.4 V (low) / 0.9 V (high) - compatible with standard GPIOs and allows clean sequencing in multi-rail systems. |
Pinout & Package
Package: XDFN-6 (1.5 mm × 1.5 mm, 0.5 mm height, wettable flank), Pb-free, RoHS-compliant.
| 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 | Active-high enable: <0.4 V = shutdown (120 nA IDIS), >0.9 V = regulation; internal 110 nA pull-down ensures default-off state. |
| 3 (N/C) | No-connect terminal | Not bonded; may be tied to GND to improve thermal dissipation but has no electrical function. |
| 4 (OUT) | Regulated 3.3 V output | Delivers up to 300 mA; requires ≥1 µF X7R/X5R ceramic capacitor placed adjacent to pin for stability. |
| 5 (GND) | Power ground reference | Connected to die via lead frame; soldered to large copper plane for optimal thermal performance (θJA = 146°C/W). |
| 6 (N/C) | No-connect terminal | Not bonded; electrically isolated - no routing or connection required. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise without CNR | 13 µVRMS output noise achieved internally - eliminates external noise-bypass cap, saving 0.5 mm² PCB area and BOM cost. |
| Dynamic IQ management | 12 µA IQ at no load, rising only modestly under load - extends runtime in intermittent-duty IoT sensors. |
| Active output discharge | 320 Ω internal discharge path to GND when disabled - ensures rapid, controlled VOUT decay for system-level power sequencing. |
| Stable with minimal COUT | Guaranteed stability with 0.1 µF–10 µF ceramic capacitors (ESR < 900 mΩ) - supports compact 0402/0603 MLCCs in wearables. |
| Robust protection suite | Integrated thermal shutdown (160°C), current limit (490 mA typ), UVLO (1.2–1.9 V), and short-circuit immunity - reduces need for external fault management. |
Applications
| Satellite Radio Power Amplifier | Portable Medical ECG Front-End |
|---|---|
Use Scenario: Powers RF power amplifier stages in handheld satellite radio receivers where supply ripple directly modulates carrier signal integrity. IC Role / Device Role / Timing Role: Ultra-low-noise 3.3 V bias rail for GaAs FET driver stages; replaces discrete RC filters + linear regulators. Use Value: 13 µVRMS noise and 68 dB PSRR prevent AM/FM distortion and adjacent-channel interference without added filtering components. |
Use Scenario: Supplies analog front-end (AFE) and precision ADC in battery-operated ECG monitors requiring sub-µV baseline stability. IC Role / Device Role / Timing Role: Clean 3.3 V reference and analog supply for instrumentation amplifiers and sigma-delta ADCs. Use Value: ±2% accuracy and 180 mV dropout enable reliable operation across full Li-ion voltage range (3.0–4.2 V) with no regulation loss. |
| Infotainment System Audio Codec | Bluetooth LE Sensor Hub |
Use Scenario: Provides low-noise supply to audio DACs and headphone drivers in automotive infotainment head units. IC Role / Device Role / Timing Role: Dedicated 3.3 V LDO for audio signal chain; decouples noisy digital domain supplies. Use Value: Eliminates audible hiss and improves SNR by rejecting coupled switching noise from nearby DC-DC converters. |
Use Scenario: Powers Bluetooth LE SoC and MEMS sensors in compact wearable health trackers with multi-day battery life. IC Role / Device Role / Timing Role: Primary 3.3 V rail with enable control synchronized to BLE advertising intervals. Use Value: 12 µA quiescent current and fast EN turn-on (<200 µs) minimize idle power while maintaining responsive wake-up latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B332MR-G | 300 mA, 3.3 V fixed, 25 µA IQ, 20 µVRMS noise, requires 2.2 µF min COUT | Higher noise and quiescent current; less suitable for ultra-low-power RF apps | Prefer NCP703MX33TCG where <15 µVRMS noise and <15 µA IQ are mandatory. |
| ROHM BD3508EFJ-M | 500 mA, 3.3 V fixed, 35 µA IQ, 40 µVRMS noise, TSOT-23-5 package | Higher current but significantly higher noise and IQ; larger footprint than XDFN-6 | Select NCP703MX33TCG for space-constrained, noise-critical 300 mA designs needing minimal board area. |
Compared with XC6210B332MR-G and BD3508EFJ-M, the NCP703MX33TCG uniquely combines 12 µA IQ, 13 µVRMS noise, and XDFN-6 footprint - making it the only option meeting stringent RF supply requirements in miniaturized portable systems.
Availability
NCP703MX33TCG is available at Aetrix Electronics and suitable for satellite radio receivers, portable ECG monitors, and Bluetooth LE sensor hubs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for NCP703MX33TCG 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, delivering silicon solutions for automotive, industrial, cloud, and intelligent edge applications.
The NCP703MX33TCG belongs to onsemi's high-performance LDO family designed specifically for powering noise-sensitive RF and precision analog subsystems in battery-operated portable equipment - emphasizing ultra-low IQ, minimal noise, and robust protection.
FAQ
What is the minimum input voltage required for stable operation of the NCP703MX33TCG?
The NCP703MX33TCG requires a minimum input voltage of 2.0 V per its absolute maximum ratings and electrical characteristics table. However, for stable 3.3 V regulation at full 300 mA load, VIN must exceed VOUT + dropout - i.e., ≥3.48 V (3.3 V + 180 mV). Below 3.48 V, output voltage will droop proportionally with decreasing VIN.
Does the NCP703MX33TCG require an external noise-bypass capacitor?
No, the NCP703MX33TCG does not require an external noise-bypass capacitor. Its internal design achieves 13 µVRMS output noise (100 Hz–100 kHz) without CNR, as confirmed in the datasheet Features section and Figure 5. This eliminates one passive component and associated layout complexity.
What is the thermal resistance (θJA) of the NCP703MX33TCG in its XDFN-6 package?
The NCP703MX33TCG in XDFN-6 (Case 711AE) has a thermal resistance θJA of 146°C/W when mounted on a 1 oz FR4 PCB with 645 mm² copper area, as specified in Table 3 of the datasheet. With enhanced 2 oz copper, θJA improves to approximately 110°C/W.
Can the NCP703MX33TCG be used with a 0402-size 1 µF ceramic output capacitor?
Yes - the NCP703MX33TCG is explicitly characterized for stability with 1 µF X7R/X5R ceramic capacitors, including 0402 packages. The datasheet Application Information section recommends 0402 capacitors to minimize solution size, noting that effective capacitance must remain ≥0.1 µF after DC bias derating.
What happens to the output when the EN pin is left floating?
When the EN pin is left floating, the internal 110 nA pull-down current source forces the EN voltage below 0.4 V, placing the NCP703MX33TCG into shutdown mode. In this state, output is disabled, active discharge pulls VOUT to GND, and total supply current drops to ~120 nA - ensuring safe default-off behavior.
NCP703MX33TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-XFDFN
- 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):
- 3.3V
- 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)
NCP703MX33TCG FAQ
1.How can I place an order for NCP703MX33TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP703MX33TCG 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 NCP703MX33TCG reliable?
The price and inventory of NCP703MX33TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP703MX33TCG is usually 5 days.
3.What payment methods are accepted for NCP703MX33TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP703MX33TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP703MX33TCG?
NCP703MX33TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP703MX33TCG 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 NCP703MX33TCG?
For technical support, including NCP703MX33TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP703MX33TCG requirements.
6.How does Aetrix verify that NCP703MX33TCG is sourced from the original manufacturer or authorized distributors?
All NCP703MX33TCG 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 NCP703MX33TCG meets industry standards.
7.What is the process for return or replacement of NCP703MX33TCG?
All NCP703MX33TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP703MX33TCG, 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 NCP703MX33TCG part is unused and in its original packaging.
Return procedure for NCP703MX33TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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