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onsemi NCP3064PG
- Part No.:
- NCP3064PG
- Manufacturer:
- onsemi
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
NCP3064PG.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,389
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Product details
Overview
NCP3064PG from onsemi is a monolithic switching regulator IC designed for step-down (buck), step-up (boost), and voltage-inverting DC-DC converter applications. It integrates a Darlington output switch (1.5 A), 150 kHz oscillator, precision 1.25 V reference (±1.5%), cycle-by-cycle current limiting, and logic-level ON/OFF shutdown control. It operates from 3.0 V to 40 V input and supports high-power LED lighting and battery charger designs.
For engineers reviewing the NCP3064PG datasheet, pinout, applications, or equivalent options, key selection considerations include its adjustable output voltage capability, internal thermal shutdown (160 °C), 100 µA standby current, Darlington switch VSWCE ≤ 1.3 V at 1.0 A, and compatibility with SOIC-8 and DFN-8 packages.
Technical Context
The NCP3064PG implements a hysteretic, gated-oscillator topology that regulates output voltage without dominant-pole loop compensation. Its oscillator frequency (110–190 kHz) is set by an external timing capacitor (CT) and features a 1:6 charge/discharge current ratio, enabling stable operation across wide input ranges.
Output regulation relies on a comparator monitoring feedback voltage at Pin 5 (COMP), while peak current protection uses a dedicated Ipk sense comparator (Pin 7) with 200 mV threshold. The Darlington switch (Pins 1 & 2) supports emitter-follower or common-emitter configurations, and thermal shutdown activates at 160 °C with 10 °C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 40 V - supports wide-input industrial and automotive supply rails without pre-regulation. |
| Switch Current Rating | 1.5 A - enables up to ~1.25 A output in buck configuration per test data (Figure 16). |
| Oscillator Frequency | 150 kHz typical (110–190 kHz range) - balances efficiency, EMI, and component size for cost-sensitive designs. |
| Reference Voltage | 1.25 V ±1.5% - provides precise feedback threshold for accurate output voltage setting via resistor divider. |
| Standby Current | 100 µA max - ensures ultra-low power consumption during ON/OFF pin low-state shutdown. |
| Current Limit Threshold | 200 mV at Pin 7 - sets peak switch current via external sense resistor (e.g., 0.15 Ω → 1.33 A limit). |
| Thermal Shutdown | 160 °C activation with 10 °C hysteresis - protects against sustained overload or poor heatsinking without latch-up. |
Pinout & Package
Package: SOIC-8 (Case 751), Pb-free, RoHS-compliant. Thermal resistance: 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 topologies. |
| 2 - SWE | Switch Emitter | Emiter of internal Darlington; serves as return path for switch current and current-sense reference. |
| 3 - CT | Timing Capacitor | Oscillator timing input; sets switching frequency via external capacitor (e.g., 2.2 nF → 150 kHz). |
| 4 - GND | Ground | Common reference for all internal circuits; must be low-impedance connection to minimize noise. |
| 5 - COMP | Comparator Inverting Input | Feedback node for output voltage regulation; connected to resistor divider from VOUT. |
| 6 - VCC | Voltage Supply | Primary power input (3–40 V); powers internal bias, oscillator, and gate drive circuitry. |
| 7 - Ipk | Peak Current Sense | Monitors voltage drop across external sense resistor to enforce cycle-by-cycle current limiting. |
| 8 - ON/OFF | Enable/Shutdown Control | Logic-level input: <1.0 V (or floating) disables switching and reduces ICC to ≤100 µA. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Topology Support | Enables buck, boost, and inverting configurations with minimal external components - reduces BOM count and design complexity. |
| Internal Darlington Switch | Integrates 1.5 A rated switch with ≤1.3 V VSWCE drop at 1.0 A - eliminates need for external high-current transistor in medium-power apps. |
| Cycle-by-Cycle Current Limiting | Uses dedicated 200 mV Ipk comparator to terminate each switch cycle if sensed current exceeds threshold - prevents device damage under overload. |
| Logic-Level ON/OFF Control | Accepts TTL-compatible signals (VIH ≥ 2.2 V, VIL ≤ 1.0 V) for seamless integration with microcontrollers and enable sequencing logic. |
| Precision Reference & Line Regulation | 1.25 V ±1.5% reference with ±6 mV line regulation over 3–40 V VCC - ensures stable output despite input rail variation. |
Applications
| LED Driver Power Supply | Battery Charger Front-End |
|---|---|
Use Scenario: Constant-current driver for high-brightness white LEDs in automotive interior lighting or portable flashlights. IC Role / Device Role / Timing Role: Regulates output voltage to maintain fixed current through LED string using external sense resistor and feedback divider. Use Value: Enables single-chip solution with 1.5 A switch and 150 kHz operation - reduces size vs. discrete MOSFET+controller designs. |
Use Scenario: Step-down converter supplying regulated 5 V or 3.3 V to USB-based Li-ion battery charging ICs from 9–24 V wall adapters or vehicle systems. IC Role / Device Role / Timing Role: Primary DC-DC regulator providing stable, adjustable output with ON/OFF control synchronized to charger enable signal. Use Value: 100 µA shutdown current and wide 3–40 V input range support always-on systems with low quiescent power requirements. |
| Industrial Sensor Node PSU | Inverting Rail Generator |
Use Scenario: Local 3.3 V supply for low-power microcontrollers and analog sensors in factory automation nodes powered from 12–24 V DC bus. IC Role / Device Role / Timing Role: Buck converter delivering regulated output with thermal shutdown and current limiting for robust field operation. Use Value: Internal 160 °C thermal protection and ±1.5% reference ensure reliability in unventilated enclosures without external thermal management. |
Use Scenario: Generating negative supply rail (e.g., –5 V or –12 V) from positive input for op-amp biasing or RS-232 interface ICs. IC Role / Device Role / Timing Role: Voltage-inverting DC-DC converter using standard external inductor/diode/capacitor network per Figure 24. Use Value: Eliminates need for separate negative charge pump IC - leverages same NCP3064PG die for three topologies with shared BOM components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34063AP | Lower frequency (100 kHz max), 1.5 A switch, no integrated thermal shutdown, wider VCC range (−0.3 to 40 V). | Lacks ON/OFF pin and thermal protection; requires external shutdown logic and thermal derating. | Select when legacy footprint compatibility is required and thermal margin is managed externally. |
| NCP3063DR2G | Same architecture but lower 1.0 A switch rating, 100 kHz oscillator, identical pinout and feature set except reduced current capability. | Suitable only for ≤1.0 A output applications; not interchangeable in 1.25 A buck designs without redesign. | Choose for cost-sensitive, lower-current applications where NCP3064PG's 1.5 A headroom is unnecessary. |
Compared with MC34063AP and NCP3063DR2G, the NCP3064PG delivers higher switching frequency, integrated thermal shutdown, and guaranteed 1.5 A switch performance - making it preferable for compact, thermally constrained, or safety-critical buck/boost/inverting supplies.
Availability
NCP3064PG is available at Aetrix Electronics and suitable for high-power LED lighting, battery charger front-ends, and industrial sensor node power supplies requiring stable component supply and long-term manufacturability.
Supply support for NCP3064PG 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, with leadership in power management, analog, and sensing technologies.
The NCP3064PG belongs to the NCP3064 Series - a higher-frequency upgrade to the MC34063A family - engineered specifically for cost-sensitive, medium-power DC-DC conversion in consumer, industrial, and automotive applications.
FAQ
What is the maximum output current achievable with the NCP3064PG in a buck configuration?
The NCP3064PG supports up to 1.25 A output current in standard buck applications, as validated in the datasheet's Figure 16 test setup (Vin = 10–16 V, Vout = 3.3 V). This is limited by the 1.5 A Darlington switch rating, PCB thermal design, and inductor saturation current. For higher currents, the datasheet shows external PMOS transistor configurations achieving 3.0 A output (Figure 24).
Does the NCP3064PG require an external Schottky diode in boost mode?
Yes, the NCP3064PG requires an external Schottky diode (e.g., MBRS230LT3G) in boost configurations to provide the flyback path for inductor current. The internal Darlington switch cannot conduct reverse current, and the diode's low forward voltage (≤0.4 V) minimizes conduction losses and improves efficiency, as confirmed in Figure 20 and Table 4 test data.
Can the NCP3064PG operate with a 2.5 V input supply?
No, the NCP3064PG has a minimum input voltage of 3.0 V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 3.0 V is not specified or guaranteed - the internal reference, oscillator, and comparator may fail to function correctly, and startup behavior is undefined.
How does the ON/OFF pin behave when left floating?
When the ON/OFF pin is left floating, the NCP3064PG enters low-power shutdown mode with standby current ≤100 µA, as stated in the Pin Description and Electrical Characteristics sections. This occurs because the internal pull-down ensures the pin defaults to logic-low state, disabling the oscillator and output switch - a safe default for unconnected control lines.
Is the NCP3064PG pin-compatible with the NCP3064DR2G?
Yes, the NCP3064PG and NCP3064DR2G share identical SOIC-8 pinout, electrical specifications, and functional behavior. The "PG" suffix denotes the same device in tape-and-reel packaging per onsemi's ordering information (page 17), differing only in packaging format - not in silicon, pin assignment, or performance.
NCP3064PG 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
- Current - Output:
- 1.5A (Switch)
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
NCP3064PG FAQ
1.How can I place an order for NCP3064PG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP3064PG 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 NCP3064PG reliable?
The price and inventory of NCP3064PG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP3064PG is usually 5 days.
3.What payment methods are accepted for NCP3064PG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP3064PG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP3064PG?
NCP3064PG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP3064PG 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 NCP3064PG?
For technical support, including NCP3064PG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP3064PG requirements.
6.How does Aetrix verify that NCP3064PG is sourced from the original manufacturer or authorized distributors?
All NCP3064PG 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 NCP3064PG meets industry standards.
7.What is the process for return or replacement of NCP3064PG?
All NCP3064PG units undergo pre-shipment inspection (PSI). If there is an issue with NCP3064PG, 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 NCP3064PG part is unused and in its original packaging.
Return procedure for NCP3064PG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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