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onsemi NCP3063BDR2G
- Part No.:
- NCP3063BDR2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
NCP3063BDR2G.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:15,787
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Product details
Overview
NCP3063BDR2G from onsemi is a monolithic step-up/down/inverting switching regulator IC featuring an internal 1.5 A Darlington output switch, 150 kHz oscillator, 1.25 V ±2% 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 power supplies and LED lighting drivers.
For engineers reviewing the NCP3063BDR2G datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, SOIC-8 package details, real-world efficiency data (≥73% buck at 3.3 V/800 mA), thermal performance limits (TJ = −40°C to +125°C), and validated alternative options for DC-DC converter design.
Technical Context
The NCP3063BDR2G implements a hysteretic, gated-oscillator control architecture that eliminates need for external loop compensation. Its oscillator frequency (110–190 kHz) is set by an external timing capacitor (CT) and internally generated 1:6 charge/discharge current ratio, yielding a typical maximum duty cycle of 85.7%.
Output regulation relies on a comparator monitoring feedback voltage against a 1.25 V reference, while peak current protection uses a dedicated IPk sense comparator with 165–235 mV threshold. Thermal shutdown activates at 160°C with 10°C hysteresis, and the Darlington switch delivers ≤1.3 V VSWCE drop at 1.0 A and 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0 V to +40 V - Supports wide-input industrial and automotive battery-fed systems without pre-regulation. |
| Switch Current Rating | 1.5 A continuous - Enables ≥800 mA output in buck configuration (e.g., 3.3 V @ 800 mA) with margin for transient loads. |
| Oscillator Frequency | 110–190 kHz (typ. 150 kHz at CT = 2.2 nF) - Balances EMI control and inductor size; allows use of low-cost, high-saturation-current chokes. |
| Reference Voltage Accuracy | ±2% over −40°C to +125°C - Ensures stable output regulation across extended temperature range for automotive and industrial environments. |
| Current Limit Threshold | 165–235 mV at IPk sense pin - Sets peak switch current via external RSC; enables precise overcurrent protection without additional sensing circuitry. |
| Thermal Shutdown | 160°C activation / 150°C recovery - Provides robust fault recovery with hysteresis to prevent thermal oscillation during overload conditions. |
| Supply Current | 7.0 mA max - Low quiescent consumption supports standby operation in battery-powered applications. |
Pinout & Package
Package: SOIC-8 (Case 751-07), Pb-free, exposed pad connected to GND (Pin 4) for enhanced thermal dissipation (RJA = 180°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Switch Collector (SWC) | Darlington switch collector terminal | Connects to inductor/diode node in buck/boost; must handle full switch voltage (≤40 V) and current (≤1.5 A). |
| 2 - Switch Emitter (SWE) | Darlington switch emitter terminal | Return path for switch current; used as gate drive source for external NMOS in high-power boost configurations. |
| 3 - Timing Capacitor (TCAP) | Oscillator timing input | Controls switching frequency via external capacitor; voltage swing limited to −0.2 V to +1.4 V - requires ceramic cap with low ESR. |
| 4 - GND | Ground reference for all internal circuits | Must be low-impedance connection; exposed pad beneath package must be soldered to PCB ground plane for thermal and electrical integrity. |
| 5 - Comparator Inverting Input (COMP) | Feedback voltage input to error amplifier | Compares resistor-divider output against 1.25 V reference; sets regulated output voltage via R1/R2 ratio (VOUT = 1.25 × (1 + R1/R2)). |
| 6 - VCC | Power supply input | Accepts 0–40 V input; powers internal circuitry; bypass capacitor required near pin for stability. |
| 7 - Ipk Sense (IPK) | Peak current limit sense input | Monitors voltage drop across external RSC to terminate switch conduction cycle-by-cycle when current exceeds threshold. |
| 8 - N.C. | No internal connection | Not bonded; must remain unconnected on PCB - floating or tied to GND per layout best practice (no functional impact). |
Key Features
| Feature | Design Value |
|---|---|
| Internal Darlington switch (1.5 A) | Eliminates need for external power transistor in ≤1 A DC-DC designs, reducing BOM count and layout complexity. |
| 150 kHz fixed-frequency oscillator | Enables predictable EMI filtering and consistent inductor sizing; frequency programmable via CT capacitor (2.2 nF typical). |
| 1.25 V ±2% reference over −40°C to +125°C | Ensures output voltage accuracy across full industrial/automotive temperature range without calibration. |
| Cycle-by-cycle current limiting | Provides immediate overcurrent protection on every switching cycle, preventing MOSFET or inductor saturation failure. |
| Thermal shutdown with 10°C hysteresis | Prevents thermal runaway during sustained overload or poor heatsinking while enabling automatic recovery after cooling. |
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 in telematics modules. IC Role / Device Role / Timing Role: Primary DC-DC controller implementing fixed-frequency hysteretic buck regulation with integrated 1.5 A switch. Use Value: Achieves >73% efficiency at 800 mA load with minimal external components (1 inductor, 2 diodes, 3 resistors, 4 capacitors) and no compensation network. |
Use Scenario: Driving high-brightness white LEDs from a 5 V USB source in portable medical devices requiring constant current. IC Role / Device Role / Timing Role: Boost controller regulating output voltage to match LED forward voltage string (e.g., 24 V @ 350 mA). Use Value: Delivers >85.5% efficiency and <350 mVpp ripple using standard Schottky rectifier and low-ESR electrolytics - no current-sense IC needed. |
| Voltage-Inverting Supply | Industrial Battery Charger |
|
Use Scenario: Generating −12 V rail from +5 V logic supply for op-amp biasing in industrial signal conditioning circuits. IC Role / Device Role / Timing Role: Inverting topology controller using single inductor and diode to produce negative output with polarity reversal. Use Value: Provides stable −12 V/100 mA output with 49.8% efficiency and <300 mVpp ripple - avoids dual-output transformer or isolated flyback design. |
Use Scenario: Charging 3.7 V Li-ion cells from variable 9–15 V solar panel or wall adapter input in portable instrumentation. IC Role / Device Role / Timing Role: Adjustable-output buck charger controller with current-limited constant-voltage profile. Use Value: Enables programmable charge voltage (via R1/R2) and current limit (via RSC) using only passive components - no dedicated charger IC required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC-DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2574N-5.0 | Fixed 5.0 V output; no adjustable feedback; 0.5 A switch; 52 kHz switching frequency | Limited to fixed-output buck only; unsuitable for boost/inverting or adjustable outputs | Select when only 5 V buck is needed and board space allows larger inductor due to lower frequency. |
| TPS61040DRVR | 0.5 A switch; 500 kHz to 1 MHz adjustable frequency; integrated Schottky diode; smaller 6-pin SOT-23 package | Optimized for low-power boost only; lacks buck/inverting capability and high-current handling | Choose for compact, high-frequency boost applications ≤100 mA where efficiency above 90% is critical. |
Compared with LM2574N-5.0 and TPS61040DRVR, the NCP3063BDR2G uniquely supports all three topologies (buck/boost/inverting) with 1.5 A switch current and extended temperature range, making it suitable for flexible, medium-power industrial converters where topology adaptability and ruggedness are prioritized over ultra-high frequency or ultra-small footprint.
Availability
NCP3063BDR2G is available at Aetrix Electronics and suitable for industrial power supplies, LED lighting drivers, and battery charging circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP3063BDR2G 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, sensors, and connectivity solutions for automotive, industrial, cloud, and IoT markets.
The NCP3063BDR2G belongs to the NCP3063 series - a higher-frequency upgrade to MC34063A - designed specifically for cost-sensitive, multi-topology DC-DC conversion in industrial and consumer equipment with minimal external components.
FAQ
What is the maximum operating junction temperature for the NCP3063BDR2G?
The NCP3063BDR2G has a maximum junction temperature of +150°C and operates across −40°C to +125°C. Its thermal shutdown activates at 160°C with 10°C hysteresis, disabling the output switch until junction temperature falls to ~150°C. This ensures safe operation under sustained overload or inadequate heatsinking, and the NCP3063BDR2G resumes normal function automatically upon cooling.
Can the NCP3063BDR2G be used in boost configuration, and what efficiency can be expected?
Yes, the NCP3063BDR2G supports boost topology - Figure 19 shows a 12 V to 24 V/350 mA design achieving >85.5% efficiency at room temperature. Efficiency depends on external component selection: a 100 µH inductor rated >1.5 A, low-VF Schottky diode (e.g., 1N5819), and low-ESR output capacitors are critical. The NCP3063BDR2G's 1.5 A switch and 150 kHz frequency enable high-efficiency medium-power boost without external transistors.
How does the NCP3063BDR2G implement current limiting, and what is the sense voltage threshold?
The NCP3063BDR2G uses cycle-by-cycle current limiting via its IPk Sense pin (Pin 7), comparing the voltage drop across an external sense resistor (RSC) to an internal 165–235 mV threshold. When exceeded, the comparator immediately terminates that switching cycle. This protects the internal Darlington switch and external magnetics. The NCP3063BDR2G's specified VIPK(Sense) range ensures reliable current limiting across temperature without calibration.
Is the NCP3063BDR2G pin-compatible with the legacy MC34063A?
No, the NCP3063BDR2G is not pin-compatible with MC34063A. While both are monolithic DC-DC controllers, the NCP3063BDR2G uses an 8-pin SOIC package with different pin assignments - e.g., Pin 1 is Switch Collector (not VOUT), Pin 2 is Switch Emitter (not VREF), and Pin 8 is N.C. (not VREF). Layout redesign and schematic updates are required to replace MC34063A with NCP3063BDR2G.
What is the purpose of the exposed pad on the NCP3063BDR2G SOIC-8 package?
The exposed pad on the NCP3063BDR2G SOIC-8 package must be soldered to the PCB ground plane. It serves two critical functions: (1) thermal dissipation - lowering junction-to-board thermal resistance and enabling higher continuous power handling, and (2) electrical grounding - providing low-inductance return path for switch currents. Per datasheet, failure to connect the exposed pad to GND (Pin 4) compromises both thermal performance and noise immunity in the NCP3063BDR2G.
NCP3063BDR2G 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:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
NCP3063BDR2G FAQ
1.How can I place an order for NCP3063BDR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP3063BDR2G 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 NCP3063BDR2G reliable?
The price and inventory of NCP3063BDR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP3063BDR2G is usually 5 days.
3.What payment methods are accepted for NCP3063BDR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP3063BDR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP3063BDR2G?
NCP3063BDR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP3063BDR2G 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 NCP3063BDR2G?
For technical support, including NCP3063BDR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP3063BDR2G requirements.
6.How does Aetrix verify that NCP3063BDR2G is sourced from the original manufacturer or authorized distributors?
All NCP3063BDR2G 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 NCP3063BDR2G meets industry standards.
7.What is the process for return or replacement of NCP3063BDR2G?
All NCP3063BDR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP3063BDR2G, 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 NCP3063BDR2G part is unused and in its original packaging.
Return procedure for NCP3063BDR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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