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onsemi NCP3063MNTXG
- Part No.:
- NCP3063MNTXG
- Manufacturer:
- onsemi
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
NCP3063MNTXG.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,267
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Product details
Overview
NCP3063MNTXG from onsemi is a monolithic step-up/down/inverting switching regulator IC featuring an integrated 1.5 A Darlington output switch, 150 kHz oscillator, 1.25 V ±1.5% precision reference, cycle-by-cycle current limiting, and thermal shutdown with 10°C hysteresis. It operates from 0–40 V input and supports buck, boost, and inverting topologies in compact DFN-8 packages for space-constrained DC-DC conversion.
For engineers reviewing the NCP3063MNTXG datasheet, pinout, applications, or equivalent options, key selection criteria include its 1.5 A internal switch current rating, 1.25 V reference accuracy, 150 kHz fixed-frequency operation, thermal shutdown threshold at 160°C, and compatibility with external transistor extensions for higher power or efficiency.
Technical Context
The NCP3063MNTXG implements a hysteretic gated-oscillator control architecture that regulates output voltage without requiring dominant-pole loop compensation. Its oscillator frequency (110–190 kHz) is set by an external timing capacitor (CT) and driven by a 1:6 internal charge/discharge current ratio.
It integrates a precision 1.25 V comparator reference, peak-current sensing via a 200 mV (typ) IPk threshold at Pin 7, and a Darlington switch with 1.3 V (max) VSWCE drop at 1.0 A - enabling direct implementation of buck, boost, and inverting converters with minimal external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0 V to +40 V - supports wide-input industrial, automotive, and battery-powered systems without pre-regulation. |
| Output Switch Current | 1.5 A continuous - enables up to ~800 mA output in buck configuration (e.g., 12 V → 3.3 V/800 mA demo) without external FET. |
| Oscillator Frequency | 150 kHz (typ), 110–190 kHz range - balances EMI, inductor size, and efficiency for cost-sensitive designs. |
| Reference Voltage | 1.25 V ±1.5% - sets output voltage accuracy in feedback loop; enables stable regulation across temperature (0°C to +70°C). |
| Current Limit Threshold | 200 mV (typ) at IPk sense pin - corresponds to ~1.5 A switch current with 0.15 Ω sense resistor, enabling robust overcurrent protection. |
| Thermal Shutdown | 160°C activation with 10°C hysteresis - prevents catastrophic failure during overload or poor heatsinking; resumes operation at ≤150°C. |
| Package Thermal Resistance | RJA = 80°C/W (DFN-8) - requires minimal PCB copper area for thermal management in moderate-power applications. |
Pinout & Package
Package: DFN-8 (4 mm × 4 mm, 0.8 mm pitch), exposed pad (EP) - must be soldered to GND for thermal and electrical integrity per datasheet Figure 3 and Package Outline 488AF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Switch Collector (SWC) | Darlington switch collector terminal | Connects to inductor/diode node in buck/boost; handles full switched current up to 1.5 A. |
| 2 - Switch Emitter (SWE) | Darlington switch emitter terminal | Return path for switch current; used as gate drive source in external NMOS configurations (e.g., Fig. 25). |
| 3 - Timing Capacitor (TCAP) | Oscillator timing input | Controls switching frequency via external capacitor (e.g., 2.2 nF → 150 kHz); max voltage 1.4 V. |
| 4 - GND | Ground reference for all internal circuits | Primary ground connection; EP pad must be tied to this pin for thermal performance and noise immunity. |
| 5 - Comparator Inverting Input (COMP) | Feedback node for output voltage regulation | Compares divided output voltage against 1.25 V reference; determines switch enable/disable timing. |
| 6 - VCC | Power supply input | Accepts 0–40 V; powers internal circuitry; supplies charging current to TCAP pin. |
| 7 - Ipk Sense (IPK) | Peak current limit sense input | Monitors voltage drop across external sense resistor; triggers cycle-by-cycle shutdown if >200 mV. |
| 8 - N.C. | No internal connection | Unbonded pin - must remain unconnected; no routing or pull-up/pull-down required. |
Key Features
| Feature | Design Value |
|---|---|
| Step-up/down/inverting topology support | Single IC replaces three discrete converter types - reduces BOM count and design time for multi-rail systems. |
| Internal 1.5 A Darlington switch | Eliminates need for external high-current switch in ≤1 A applications, simplifying layout and lowering cost. |
| 150 kHz fixed-frequency oscillator | Enables predictable EMI filtering and consistent inductor sizing; avoids sub-harmonic instability of variable-frequency controllers. |
| 1.25 V ±1.5% precision reference | Ensures tight output voltage tolerance (e.g., ±3% for 3.3 V output) without trimming resistors or external references. |
| Thermal shutdown with hysteresis | Prevents thermal runaway during sustained overload while avoiding oscillatory shutdown/restart behavior. |
| Pb-free DFN-8 package | Meets RoHS compliance requirements; 4×4 mm footprint saves board space vs. SOIC-8 (7.5×5 mm). |
Applications
| Buck (Step-Down) Power Supply | Boost (Step-Up) LED Driver |
|---|---|
|
Use Scenario: Converting 12 V automotive battery to regulated 3.3 V for microcontroller and sensor rails. IC Role / Device Role / Timing Role: Primary DC-DC controller managing switch timing, current limiting, and feedback regulation. Use Value: Achieves >73% efficiency at 800 mA load with only 7 external components (L, D, Cin, Cout, Rsense, R1, R2) per Figure 16. |
Use Scenario: Driving high-brightness white LEDs from a single-cell Li-ion (3.0–4.2 V) source. IC Role / Device Role / Timing Role: Boost controller regulating constant current through LED string via feedback from current-sense resistor. Use Value: Delivers 350 mA at 24 V with >85.5% efficiency (Figure 21), leveraging 1.5 A switch to avoid external FET in mid-power LED apps. |
| Voltage-Inverting Rail Generator | Industrial Sensor Bias Supply |
|
Use Scenario: Generating −12 V from +5 V USB supply for op-amp biasing or RS-232 interface ICs. IC Role / Device Role / Timing Role: Inverting regulator controlling polarity reversal and output regulation via COMP and IPK pins. Use Value: Provides stable −12 V/100 mA with <1.6 mV load regulation (Figure 22), using same IC and layout flexibility as buck/boost variants. |
Use Scenario: Powering analog front-end sensors requiring isolated negative bias in factory automation PLC modules. IC Role / Device Role / Timing Role: Compact, low-noise inverting DC-DC source delivering clean −12 V rail with minimal component count. Use Value: Enables dual-rail op-amp operation without transformer-based solutions; achieves 49.8% efficiency at 100 mA (Figure 24), acceptable for low-current sensor bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34063A | Legacy predecessor; 100 kHz max frequency, 1.5 A switch, but ±2% reference and no thermal shutdown hysteresis. | Lacks integrated thermal hysteresis and has looser reference tolerance - less suitable for thermally demanding or precision-output applications. | Select NCP3063MNTXG when higher frequency, tighter reference, or reliable thermal protection is required. |
| NCP3063BDR2G | Same core silicon, but in SOIC-8 package (RJA = 180°C/W vs. 80°C/W) and rated for −40°C to +125°C operating range. | SOIC-8 variant offers wider temperature grade and easier hand-soldering, but requires larger PCB area and more thermal copper. | Choose NCP3063MNTXG for space-constrained, cost-sensitive designs where 0°C to +70°C ambient suffices and DFN thermal performance is critical. |
Compared with MC34063A, NCP3063MNTXG delivers tighter voltage regulation and safer thermal behavior; versus NCP3063BDR2G, it trades wider temperature range for superior thermal dissipation and smaller footprint - making it optimal for consumer and industrial embedded power stages where size and efficiency outweigh extended temp needs.
Availability
NCP3063MNTXG is available at Aetrix Electronics and suitable for buck converters, boost LED drivers, and inverting bias supplies requiring stable component supply, Pb-free compliance, and DFN-8 space efficiency.
Supply support for NCP3063MNTXG 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 manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCP3063MNTXG belongs to onsemi's legacy monolithic DC-DC regulator product line, designed specifically to replace MC34063A/33063A with enhanced frequency, accuracy, and protection features for cost-sensitive, medium-power conversion.
FAQ
What is the maximum input voltage supported by the NCP3063MNTXG?
The NCP3063MNTXG supports a maximum input voltage of +40 V on the VCC pin (Pin 6) and Darlington switch collector (Pin 1), as specified in the Absolute Maximum Ratings table. This allows direct operation from 24 V industrial buses or 36 V automotive transients without external pre-regulation - provided external components (inductor, diode, capacitors) are rated accordingly.
Can the NCP3063MNTXG be used in a boost configuration, and what is its typical efficiency?
Yes, the NCP3063MNTXG is explicitly validated for boost operation - Figure 19 shows a +12 V to +24 V/350 mA design achieving >85.5% efficiency at room temperature. Its 1.5 A internal switch and 150 kHz oscillator enable efficient mid-power boost conversion without external MOSFETs, though efficiency drops at light loads due to fixed switching losses.
What is the purpose of the exposed pad on the NCP3063MNTXG DFN-8 package?
The exposed pad beneath the NCP3063MNTXG DFN-8 package must be soldered to GND (Pin 4) per datasheet Figure 3 and Package Outline 488AF. It serves dual roles: reducing thermal resistance (RJA = 80°C/W) to improve power handling, and providing a low-inductance ground return path that enhances noise immunity and stability in switching operation.
How does the NCP3063MNTXG implement current limiting, and what external component sets the threshold?
The NCP3063MNTXG uses cycle-by-cycle current limiting sensed at Pin 7 (Ipk Sense). A resistor (RSC) placed between VCC and the switch emitter converts peak switch current to a voltage; when this exceeds 200 mV (typ), the internal comparator disables the switch. For 1.5 A limiting, RSC = 0.15 Ω (200 mV / 1.5 A), as used in Figures 16–24.
Is the NCP3063MNTXG pin-compatible with the MC34063A?
No - the NCP3063MNTXG is not pin-compatible with the MC34063A. While both are 8-pin regulators, their pin functions differ: MC34063A Pin 1 is VCC, whereas NCP3063MNTXG Pin 1 is Switch Collector. Layout redesign and schematic updates are required for replacement; refer to Figures 2 and 16 for correct NCP3063MNTXG pin assignments.
NCP3063MNTXG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck, Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 40V (Switch)
- Current - Output:
- 1.5A (Switch)
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (4x4)
NCP3063MNTXG FAQ
1.How can I place an order for NCP3063MNTXG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP3063MNTXG 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 NCP3063MNTXG reliable?
The price and inventory of NCP3063MNTXG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP3063MNTXG is usually 5 days.
3.What payment methods are accepted for NCP3063MNTXG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP3063MNTXG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP3063MNTXG?
NCP3063MNTXG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP3063MNTXG 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 NCP3063MNTXG?
For technical support, including NCP3063MNTXG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP3063MNTXG requirements.
6.How does Aetrix verify that NCP3063MNTXG is sourced from the original manufacturer or authorized distributors?
All NCP3063MNTXG 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 NCP3063MNTXG meets industry standards.
7.What is the process for return or replacement of NCP3063MNTXG?
All NCP3063MNTXG units undergo pre-shipment inspection (PSI). If there is an issue with NCP3063MNTXG, 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 NCP3063MNTXG part is unused and in its original packaging.
Return procedure for NCP3063MNTXG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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