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onsemi NCP3063BPG
- Part No.:
- NCP3063BPG
- Manufacturer:
- onsemi
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
NCP3063BPG.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,734
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Product details
Overview
NCP3063BPG 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 ±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 and consumer power supplies.
For engineers reviewing the NCP3063BPG datasheet, pinout, applications, or equivalent options, this device is selected for its wide input voltage range, adjustable output capability, internal current limit sensing at 200 mV, SOIC-8 Pb-free packaging, and suitability for high-power LED drivers and battery charger circuits requiring minimal external components.
Technical Context
The NCP3063BPG implements a hysteretic, gated-oscillator DC-DC control architecture that eliminates need for loop compensation. Its oscillator frequency (110–190 kHz) is set by an external timing capacitor (CT), and switching duty cycle is determined by a 1:6 internal charge/discharge current ratio - yielding a maximum theoretical tON/(tON+tOFF) of 0.857.
Output regulation is achieved via a comparator monitoring feedback voltage against a 1.25 V reference; overcurrent protection uses peak-current sensing through an external RSC resistor with 200 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 up to ~800 mA output in buck configuration (e.g., 12 V → 3.3 V @ 73%+ efficiency). |
| Oscillator Frequency | 110–190 kHz (typ. 150 kHz at CT = 2.2 nF) - balances EMI, inductor size, and efficiency for mid-power converters. |
| Reference Voltage | 1.25 V ±2% - sets output accuracy in feedback divider networks; tighter tolerance than MC34063A (±1.5% for NCP3063, ±2% for NCP3063B). |
| Current Limit Threshold | 200 mV (typ.) at IPK sense pin - defines peak switch current via RSC = 0.2 Ω for 1 A limit; enables robust short-circuit protection. |
| Thermal Shutdown | 160°C activation / 150°C recovery - prevents catastrophic failure under overload or poor heatsinking; hysteresis avoids oscillation near trip point. |
| Operating Junction Temp | −40°C to +125°C - qualified for extended industrial and automotive ambient environments (NCP3063B variant). |
Pinout & Package
Package: SOIC-8 (Case 751), Pb-free, with exposed pad tied to GND (Pin 4) for enhanced thermal performance (RJA = 180°C/W, RJC = 45°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SWC) | Switch Collector | Collector of internal Darlington transistor; connects to inductor/rectifier node in buck/boost/inverting topologies. |
| 2 (SWE) | Switch Emitter | Emiter of internal Darlington; serves as return path for switch current and gate drive reference for external transistor configurations. |
| 3 (TCAP) | Timing Capacitor | Oscillator timing node; CT value sets frequency; max voltage 1.4 V - critical for pulse-feedback implementations. |
| 4 (GND) | Ground | Common reference for all internal circuits; exposed pad must be soldered to PCB ground plane for thermal and electrical integrity. |
| 5 (COMP) | Comparator Inverting Input | Feedback node for output voltage regulation; connected to resistor divider from VOUT to set regulated voltage via VREF. |
| 6 (VCC) | Voltage Supply | Primary power input (0–40 V); powers internal circuitry and charges CT; also used as reference for IPK sense comparator. |
| 7 (IPK) | IPK Sense | Current-limit monitor input; senses voltage drop across RSC between VCC and SWC to terminate conduction cycle-by-cycle. |
| 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 typical). |
| Internal 1.5 A Darlington switch | Eliminates need for external power transistor in sub-1 A applications, reducing BOM count and layout complexity. |
| Cycle-by-cycle current limiting | Provides immediate overcurrent response using 200 mV threshold - protects switch and inductor during startup or short-circuit events. |
| Thermal shutdown with hysteresis | Prevents thermal runaway by disabling switch above 160°C and re-enabling only after cooling to 150°C - avoids repeated tripping. |
| Pb-free SOIC-8 package | Complies with RoHS requirements; exposed pad improves thermal dissipation and mechanical reliability in reflow assembly. |
Applications
| Battery Charger | High-Power LED Driver |
|---|---|
Use Scenario: Charging single-cell Li-ion or multi-cell NiMH batteries from variable DC sources (e.g., USB, solar, or wall adapters). IC Role / Device Role / Timing Role: Regulates constant-current/constant-voltage output using feedback from current-sense resistor and voltage divider; oscillator sets switching rhythm. Use Value: Achieves >85% efficiency in boost mode (12 V → 24 V @ 350 mA) with minimal external parts - reduces heat and bill-of-materials cost. |
Use Scenario: Driving high-brightness LED strings in automotive lighting, signage, or industrial task lighting where input voltage varies (e.g., 9–16 V vehicle rail). IC Role / Device Role / Timing Role: Acts as constant-current buck regulator; COMP pin monitors LED current via sense resistor; oscillator governs PWM frequency. Use Value: Delivers stable 800 mA output at 3.3 V from 12 V input with <9 mV load regulation - ensures uniform LED brightness across operating conditions. |
| Step-Down Power Supply | Voltage-Inverting Supply |
Use Scenario: Generating low-noise 3.3 V or 5 V rails from higher-voltage industrial or telecom inputs (e.g., 12 V or 24 V backplanes). IC Role / Device Role / Timing Role: Implements buck topology with external diode, inductor, and feedback resistors; VCC powers internal circuitry while SWC/SWE handle power switching. Use Value: Provides 73%+ efficiency at full load with ≤85 mVpp ripple - meets tight regulation specs for microcontroller and sensor subsystems. |
Use Scenario: Creating negative supply rails (e.g., −12 V) for op-amps, RS-232 transceivers, or analog front-ends from positive-only sources like 5 V USB. IC Role / Device Role / Timing Role: Configured in inverting topology; SWC switches inductor to ground, SWE returns to input; polarity inversion occurs across output capacitor. Use Value: Delivers −12 V @ 100 mA with 49.8% efficiency and <300 mVpp ripple - enables dual-rail analog designs without dedicated negative generators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34063AP1G | Lower frequency (100 kHz max), ±1.5% reference, 1.5 A switch, but −40°C to +85°C rating only. | Lacks thermal shutdown hysteresis and has wider VREF drift over temperature - less robust in high-temp industrial use. | Select when cost is primary constraint and ambient temperature stays below 85°C; verify stability with larger CT values. |
| NCP3063DR2G | Same silicon die and features, but rated for 0°C to +70°C operation (NCP3063 vs. NCP3063B). | Not qualified for extended temperature range - unsuitable for automotive under-hood or outdoor industrial deployments. | Choose for commercial-grade applications where junction temperature remains ≤70°C; identical pinout and design-in compatibility. |
Compared with MC34063AP1G and NCP3063DR2G, the NCP3063BPG offers superior thermal protection (160°C shutdown with hysteresis), extended temperature operation (−40°C to +125°C), and tighter reference tolerance stability - making it preferred for ruggedized, long-lifecycle power designs.
Availability
NCP3063BPG is available at Aetrix Electronics and suitable for battery chargers, high-power LED lighting, and industrial step-down/step-up power supplies requiring stable component supply, RoHS compliance, and extended temperature support.
Supply support for NCP3063BPG 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 power management, analog, sensor, and logic solutions for automotive, industrial, cloud, and IoT markets.
The NCP3063BPG belongs to onsemi's legacy DC-DC converter product line, designed specifically to upgrade MC34063A-based designs with higher frequency, improved thermal protection, and extended temperature capability - targeting cost-sensitive yet reliable power conversion.
FAQ
What is the maximum input voltage supported by the NCP3063BPG?
The NCP3063BPG supports an absolute maximum input voltage of +40 V on the VCC pin (Pin 6) and Darlington switch collector (Pin 1). Operation beyond this rating risks permanent damage. For reliable long-term use, design margins should keep VCC ≤36 V under transient conditions. The NCP3063BPG datasheet confirms this limit in the Maximum Ratings table on page 3.
Does the NCP3063BPG require external compensation components?
No, the NCP3063BPG uses a hysteretic, gated-oscillator control architecture that does not require external loop compensation components. Its stability is inherent to the oscillator-based timing and comparator feedback structure - eliminating the need for compensation capacitors or resistors typically found in voltage-mode or current-mode controllers. This simplifies design and reduces BOM count.
Can the NCP3063BPG be used in voltage-inverting configurations?
Yes, the NCP3063BPG is explicitly designed for voltage-inverting applications, as confirmed in the datasheet title, introduction, and Figure 22 schematic. In inverting mode, Pin 1 (SWC) switches the inductor to ground while Pin 2 (SWE) connects to input, generating a negative output referenced to system ground - enabling −12 V @ 100 mA operation with verified efficiency and regulation.
What is the purpose of the exposed pad on the NCP3063BPG SOIC-8 package?
The exposed pad beneath the NCP3063BPG SOIC-8 package must be soldered to PCB ground (Pin 4) to ensure proper thermal dissipation and electrical reference integrity. Per datasheet page 3, this connection reduces thermal resistance (RJC = 45°C/W) and enhances power handling - especially critical during 1.5 A switching events. Leaving it unconnected degrades thermal performance and may trigger premature thermal shutdown.
How does the NCP3063BPG implement cycle-by-cycle current limiting?
The NCP3063BPG monitors voltage across an external sense resistor (RSC) placed between VCC and Pin 1 (SWC) using the IPK pin (Pin 7). When the sensed voltage exceeds 200 mV (typ.), the internal comparator immediately terminates the current switching cycle - preventing peak current from exceeding ~1 A (for RSC = 0.2 Ω). This action repeats each oscillator cycle, providing robust, real-time overcurrent protection for the NCP3063BPG.
NCP3063BPG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
NCP3063BPG FAQ
1.How can I place an order for NCP3063BPG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP3063BPG 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 NCP3063BPG reliable?
The price and inventory of NCP3063BPG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP3063BPG is usually 5 days.
3.What payment methods are accepted for NCP3063BPG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP3063BPG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP3063BPG?
NCP3063BPG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP3063BPG 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 NCP3063BPG?
For technical support, including NCP3063BPG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP3063BPG requirements.
6.How does Aetrix verify that NCP3063BPG is sourced from the original manufacturer or authorized distributors?
All NCP3063BPG 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 NCP3063BPG meets industry standards.
7.What is the process for return or replacement of NCP3063BPG?
All NCP3063BPG units undergo pre-shipment inspection (PSI). If there is an issue with NCP3063BPG, 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 NCP3063BPG part is unused and in its original packaging.
Return procedure for NCP3063BPG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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