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onsemi NCP3063DR2G
- Part No.:
- NCP3063DR2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
NCP3063DR2G.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,745
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Product details
Overview
NCP3063DR2G 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 cost-sensitive industrial and consumer power supplies.
For engineers reviewing the NCP3063DR2G datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, SOIC-8 package details, real-world efficiency data (≥73% buck, ≥85.5% boost), thermal performance limits, and validated alternative options for DC-DC converter design.
Technical Context
The NCP3063DR2G implements a hysteretic, gated-oscillator DC-DC control architecture-eliminating need for external loop compensation. Its oscillator frequency (110–190 kHz) is set by an external timing capacitor (CT), while output voltage regulation is achieved via feedback to the comparator's inverting input (Pin 5) referenced to the internal 1.25 V bandgap.
Current limiting operates cycle-by-cycle using the Ipk Sense pin (Pin 7), triggering at 165–235 mV across an external sense resistor. The Darlington switch (Pin 1 collector / Pin 2 emitter) sustains ≤1.3 V VSWCE drop at 1.0 A and shuts down thermally above 160°C, re-enabling at ≤150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0 V to +40 V - supports wide-input industrial rails and automotive battery transients without pre-regulation. |
| Switch Current Rating | 1.5 A continuous - enables ≥800 mA buck and ≥350 mA boost outputs with standard external passives. |
| Oscillator Frequency | 110–190 kHz (typ. 150 kHz @ CT = 2.2 nF) - balances EMI, inductor size, and efficiency for mid-power converters. |
| Reference Voltage | 1.25 V ±1.5% - sets output accuracy in feedback divider networks; line regulation ±6 mV over 5–40 V VCC. |
| Current Limit Threshold | 165–235 mV at Pin 7 - defines peak switch current via RSC; enables precise overcurrent protection without sensing resistors >0.2 Ω. |
| Thermal Shutdown | 160°C activation with 10°C hysteresis - prevents catastrophic failure during overload or poor heatsinking; self-recovering. |
| Supply Current | 7.0 mA typical - ensures low quiescent power in battery-backed or standby systems. |
Pinout & Package
Package: SOIC-8 (Case 751-07), Pb-free, with exposed pad (EP) requiring connection to GND (Pin 4) for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SWC) | Switch Collector | High-current Darlington collector node; connects to inductor (buck/boost) or diode anode (inverting); rated 0–40 V, 1.5 A. |
| 2 (SWE) | Switch Emitter | Emitter return path for internal switch; ties to GND (buck) or input rail (boost/inverting); voltage swing up to −0.6 V under turn-off. |
| 3 (TCAP) | Timing Capacitor | Oscillator timing node; charges/discharges CT to set fOSC; max voltage 1.4 V; sensitive to layout parasitics. |
| 4 (GND) | Ground | Common reference for all internal circuits and EP pad; must be low-impedance plane for stability and thermal conduction. |
| 5 (COMP) | Comparator Inverting Input | Feedback node for output voltage regulation; compares divided VOUT against 1.25 V reference. |
| 6 (VCC) | Voltage Supply | Primary power input (0–40 V); powers internal logic, oscillator, and gate drive; bypass with ≥0.1 µF ceramic. |
| 7 (IPK) | Ipk Sense | Current limit comparator input; monitors voltage drop across RSC to terminate switch conduction when threshold exceeded. |
| 8 (N.C.) | No Connect | Internally unconnected; must remain floating-no external bias or routing permitted. |
Key Features
| Feature | Design Value |
|---|---|
| 150 kHz fixed-frequency oscillator | Enables predictable EMI filtering and consistent inductor sizing; programmable via CT capacitor (2.2 nF nominal). |
| 1.25 V ±1.5% precision reference | Ensures stable output voltage accuracy across temperature (±0.02 V drift from 0°C to 70°C) without trimming. |
| Cycle-by-cycle current limiting | Prevents switch destruction during short-circuit or overload by disabling conduction each cycle exceeding 200 mV at IPK pin. |
| Internal thermal shutdown with hysteresis | Protects die at 160°C and prevents oscillation near trip point by requiring 10°C cooldown before restart. |
| SOIC-8 with exposed thermal pad | Delivers 45°C/W junction-to-case thermal resistance; EP pad tied to GND improves power dissipation by >30% vs. standard SOIC. |
Applications
| Buck (Step-Down) Power Supply | Boost (Step-Up) Power Supply |
|---|---|
|
Use Scenario: Converting 12 V automotive battery to regulated 3.3 V for microcontrollers and sensors. IC Role / Device Role / Timing Role: Primary DC-DC controller managing switch timing, current sensing, and feedback regulation. Use Value: Achieves >73% efficiency at 800 mA load with minimal external parts (1 inductor, 2 caps, 2 resistors, 1 diode). |
Use Scenario: Generating 24 V from 12 V input for industrial actuators or LED drivers. IC Role / Device Role / Timing Role: Regulator IC controlling boost topology switch duty cycle and peak current. Use Value: Delivers >85.5% efficiency at 350 mA with <350 mVpp ripple; supports wide input (9–15 V) with <2 mV line regulation. |
| Voltage-Inverting Supply | High-Power LED Driver |
|
Use Scenario: Creating −12 V rail from +5 V USB supply for op-amp biasing or analog circuitry. IC Role / Device Role / Timing Role: Core inverting converter controller with integrated switch and current sensing. Use Value: Provides stable −12 V/100 mA output with <300 mVpp ripple and 49.8% efficiency; compact solution with 22 µH inductor. |
Use Scenario: Driving high-brightness LEDs from variable input (e.g., 8–19 V) with constant current. IC Role / Device Role / Timing Role: Switching regulator IC configured in buck mode to regulate LED string current via sense resistor. Use Value: Supports up to 3 A output with external PMOS (NTGS4111P); achieves >90% efficiency at 3 A with pulse-feedback optimization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2574N-5.0 | Fixed 5 V output; no adjustable feedback; lower 0.5 A switch current; 52 kHz oscillator. | Limited to fixed-output buck only; unsuitable for boost/inverting or >500 mA loads. | Select NCP3063DR2G when adjustable output, topology flexibility, or >1 A current is required. |
| NCV3063DR2G | Automotive-grade variant; same pinout and electrical specs; qualified to AEC-Q100 Grade 1 (−40°C to +125°C). | Required for automotive ECUs, ADAS modules, or industrial systems needing extended temperature operation. | Choose NCV3063DR2G for automotive qualification; otherwise NCP3063DR2G suffices for commercial/industrial use. |
Compared with LM2574N-5.0, the NCP3063DR2G offers topology versatility and higher current, while NCV3063DR2G extends operating range for harsh environments-neither is pin-compatible with MC34063A due to different pin assignments and thermal pad requirements.
Availability
NCP3063DR2G is available at Aetrix Electronics and suitable for buck converters, boost supplies, and voltage-inverting power rails requiring stable component supply, long-term manufacturability, and Pb-free compliance.
Supply support for NCP3063DR2G 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, and sensor solutions for automotive, industrial, and cloud infrastructure markets.
The NCP3063DR2G belongs to onsemi's legacy DC-DC converter family designed for cost-sensitive, medium-power applications where simplicity, reliability, and wide input range outweigh ultra-high efficiency or ultra-low IQ requirements.
FAQ
What is the maximum input voltage rating for the NCP3063DR2G?
The NCP3063DR2G supports a VCC input voltage range of 0 V to +40 V, verified per its Absolute Maximum Ratings table. This allows direct operation from 24 V industrial rails or 36 V automotive transients without external clamping or pre-regulation-critical for robustness in variable-input environments.
Can the NCP3063DR2G be used in boost configuration?
Yes, the NCP3063DR2G is explicitly designed for boost (step-up) operation, as confirmed by Figure 19 and test data showing 24 V/350 mA output from 12 V input with >85.5% efficiency. Its Darlington switch, current-sense architecture, and oscillator timing make it fully capable of regulating boosted outputs with standard external components.
What is the purpose of the exposed pad on the NCP3063DR2G SOIC-8 package?
The exposed pad beneath the NCP3063DR2G SOIC-8 package must be soldered to GND (Pin 4) to serve dual functions: (1) lowering thermal resistance to 45°C/W (junction-to-case), improving power handling; and (2) providing a low-inductance ground return for the high-current switch node-both essential for stability and reliability.
Does the NCP3063DR2G require external compensation components?
No, the NCP3063DR2G uses a hysteretic, gated-oscillator control architecture that inherently avoids loop instability-eliminating the need for external compensation networks. This simplifies design and reduces BOM count compared to voltage-mode or current-mode controllers requiring error amplifier compensation.
How does the current limit function on the NCP3063DR2G?
The NCP3063DR2G implements cycle-by-cycle current limiting via Pin 7 (IPK). When the voltage across the external sense resistor exceeds 165–235 mV, the internal comparator disables the output switch for that oscillator cycle-preventing damage during overload or short-circuit while maintaining regulation under normal conditions.
NCP3063DR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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-SOIC
NCP3063DR2G FAQ
1.How can I place an order for NCP3063DR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP3063DR2G 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 NCP3063DR2G reliable?
The price and inventory of NCP3063DR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP3063DR2G is usually 5 days.
3.What payment methods are accepted for NCP3063DR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP3063DR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP3063DR2G?
NCP3063DR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP3063DR2G 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 NCP3063DR2G?
For technical support, including NCP3063DR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP3063DR2G requirements.
6.How does Aetrix verify that NCP3063DR2G is sourced from the original manufacturer or authorized distributors?
All NCP3063DR2G 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 NCP3063DR2G meets industry standards.
7.What is the process for return or replacement of NCP3063DR2G?
All NCP3063DR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP3063DR2G, 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 NCP3063DR2G part is unused and in its original packaging.
Return procedure for NCP3063DR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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