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onsemi NCP3064BPG
- Part No.:
- NCP3064BPG
- Manufacturer:
- onsemi
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
NCP3064BPG.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,956
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Product details
Overview
NCP3064BPG from onsemi is a monolithic switching regulator IC designed for step-down, step-up, and voltage-inverting DC-DC conversion with integrated 1.5 A Darlington output switch, 150 kHz oscillator, 1.25 V ±1.5% reference, 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 applications.
For engineers reviewing the NCP3064BPG datasheet, pinout, applications, or equivalent options, key selection criteria include its adjustable output voltage capability, cycle-by-cycle current limiting at 200 mV sense threshold, thermal shutdown at 160 °C, SOIC-8 package compatibility, and −40 °C to +125 °C operating junction temperature range.
Technical Context
The NCP3064BPG implements a hysteretic, gated-oscillator DC-DC converter architecture with internal temperature-compensated 1.25 V reference and comparator-based feedback control. Its oscillator frequency (110–190 kHz) is set by an external timing capacitor (CT) and features a 1:6 charge-to-discharge current ratio.
Output regulation relies on peak-current sensing via an external Rsense resistor and comparator-driven latch control of the Darlington switch. Thermal shutdown (160 °C, 10 °C hysteresis) and cycle-by-cycle current limiting provide robust protection under overload or loss-of-feedback conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 40 V - supports wide-input industrial and automotive battery systems without pre-regulation. |
| Switch Current Rating | 1.5 A - enables up to ~1.25 A continuous output in buck configuration with margin for ripple and derating. |
| Oscillator Frequency | 150 kHz (typical) - balances efficiency, EMI, and external component size (e.g., 2.2 nF CT yields nominal frequency). |
| Reference Voltage | 1.25 V ±1.5% - ensures precise output voltage setting across temperature and supply variations. |
| Current Limit Threshold | 200 mV (typical) - sets peak switch current via external Rsense = 0.20 V / Ipk, enabling accurate overcurrent protection. |
| Standby Current | 100 µA (typical) - allows ultra-low-power shutdown mode when ON/OFF pin is pulled low or floating. |
| Thermal Shutdown | 160 °C with 10 °C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
Package: SOIC-8 (Case 751), Pb-free, surface-mount. Exposed pad not present in SOIC-8 variant; pin 4 is GND and serves as primary thermal and electrical reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SWC) | Switch Collector | High-side collector of internal Darlington transistor; connects to inductor/rectifier node in buck/boost topologies. |
| 2 (SWE) | Switch Emitter | Emiter of internal Darlington; ties to ground or sense resistor in standard configurations; defines current path return. |
| 3 (CT) | Timing Capacitor | Oscillator timing node; charges/discharges via internal 1:6 current source/sink to set switching frequency. |
| 4 (GND) | Ground | Common reference for all internal circuits and external feedback/sense networks; critical for noise immunity. |
| 5 (COMP) | Comparator Inverting Input | Feedback node for output voltage regulation; connected to resistor divider from VOUT to set target via 1.25 V reference. |
| 6 (VCC) | Voltage Supply | Power input for internal circuitry; must be ≥3.0 V and ≤40 V; powers oscillator, reference, and driver stages. |
| 7 (Ipk) | Peak Current Sense | Monitors voltage drop across external Rsense; triggers cycle-by-cycle shutdown if >200 mV relative to VCC. |
| 8 (ON/OFF) | Enable Control | Logic-level shutdown pin; <1.0 V (or open) disables switching and reduces ICC to ≤100 µA; >2.2 V enables operation. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Voltage | Enabled via external resistor divider on COMP pin; supports buck, boost, and inverting topologies without redesign. |
| Integrated Darlington Switch | Eliminates need for external high-current transistor; simplifies layout and reduces BOM count in cost-sensitive designs. |
| Cycle-by-Cycle Current Limiting | Prevents switch destruction during short-circuit or startup surge by terminating conduction each cycle above 200 mV sense threshold. |
| Logic-Level ON/OFF Control | Accepts TTL-compatible signals; enables PWM dimming in LED drivers or system-level power sequencing without level-shifting. |
| Internal Thermal Shutdown | Self-protects against overheating; latches off until die cools to ~150 °C, avoiding thermal runaway in enclosed environments. |
Applications
| LED Driver for Automotive Lighting | Battery Charger for 12 V Lead-Acid Systems |
|---|---|
|
Use Scenario: Driving high-brightness white LEDs from vehicle battery (9–16 V) with constant-current regulation. IC Role / Device Role / Timing Role: Acts as step-down controller with external MOSFET or diode rectification; regulates LED current via feedback loop and Ipk sensing. Use Value: Delivers stable 350 mA–1.25 A LED current with <10 mV load regulation and 70–82% efficiency across input range. |
Use Scenario: Charging sealed lead-acid batteries from variable DC sources (e.g., solar panel or alternator). IC Role / Device Role / Timing Role: Configured as adjustable step-down converter to deliver regulated 13.8 V/1.25 A output with thermal foldback. Use Value: Maintains ±8 mV line regulation and <350 mV output ripple while supporting full-temperature operation from −40 °C to +125 °C. |
| Industrial DC-DC Converter for Sensor Power | Inverting Supply for Analog Signal Conditioning |
|
Use Scenario: Generating isolated 5 V or 3.3 V rails from unregulated 24 V factory bus for analog sensors and microcontrollers. IC Role / Device Role / Timing Role: Implements non-isolated buck topology with external inductor and Schottky diode; uses ON/OFF for remote enable. Use Value: Achieves 70% efficiency at 500 mA load and supports standby current <100 µA for low-power wake-on-event architectures. |
Use Scenario: Creating negative rail (e.g., −5 V or −12 V) from positive supply for op-amp biasing or ADC reference in mixed-signal systems. IC Role / Device Role / Timing Role: Configured as voltage-inverting converter; SWC and SWE pins define polarity inversion path with coupled inductor. Use Value: Provides tightly regulated inverted output with <85 mV peak-to-peak ripple and ±1.5% reference accuracy over full temperature range. |
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 5.0 V output; no adjustable feedback; lower 52 kHz frequency; 0.5 A switch current. | Limited to fixed-output step-down only; unsuitable for boost/inverting or custom voltage settings. | Select when cost and simplicity outweigh flexibility-ideal for basic 5 V point-of-load where external resistors are undesirable. |
| MP1584EN-LF-Z | Higher 1.5 MHz switching frequency; 3 A switch; requires external compensation; no integrated Darlington. | Enables smaller magnetics but demands more design effort; lacks built-in current-sense comparator and thermal shutdown. | Choose for compact, high-efficiency designs needing >1.25 A output; verify external protection circuitry replaces NCP3064BPG's integrated safety features. |
Compared with LM2574N-5.0 and MP1584EN-LF-Z, the NCP3064BPG uniquely combines adjustable topology support, integrated Darlington switch, cycle-by-cycle current limiting, and automotive-grade temperature range in a single SOIC-8 package-making it optimal for cost-sensitive, multi-function DC-DC designs requiring robustness and minimal external components.
Availability
NCP3064BPG is available at Aetrix Electronics and suitable for industrial sensor power supplies, automotive LED lighting systems, and battery charging circuits requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP3064BPG 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 NCP3064BPG belongs to onsemi's legacy DC-DC converter product line, engineered to replace MC34063A with higher frequency, tighter reference tolerance, and enhanced protection features for cost-driven embedded power applications.
FAQ
What is the maximum input voltage rating for the NCP3064BPG?
The NCP3064BPG supports a maximum input voltage of 40 V on the VCC pin (Pin 6) and SWC pin (Pin 1), as specified in the Absolute Maximum Ratings table. Operation beyond this limit risks permanent damage. The device is rated for continuous operation from 3.0 V to 40 V, making it suitable for 24 V industrial buses and 12 V automotive systems with transient tolerance.
Does the NCP3064BPG support boost and inverting topologies out of the box?
Yes, the NCP3064BPG natively supports step-up (boost), step-down (buck), and voltage-inverting configurations using only external passive components-no firmware or additional ICs required. Application schematics in the datasheet (Figures 20 and 24) validate boost operation up to 24 V output, and inverting designs delivering regulated negative rails.
What is the purpose of the Ipk pin (Pin 7) on the NCP3064BPG?
The Ipk pin (Pin 7) on the NCP3064BPG monitors the voltage drop across an external sense resistor placed between VCC and the Darlington emitter (Pin 2). When this voltage exceeds 200 mV (typical), the internal comparator triggers cycle-by-cycle shutdown of the output switch-providing fast, reliable overcurrent protection without external controllers.
Can the NCP3064BPG operate across the full automotive temperature range?
Yes, the NCP3064BPG (denoted by the "B" suffix) is qualified for −40 °C to +125 °C junction temperature operation, meeting requirements for under-hood and cabin-mounted automotive electronics. This is explicitly confirmed in the Electrical Characteristics table and distinguishes it from the commercial-grade NCP3064 (0 °C to +70 °C).
How does the ON/OFF pin (Pin 8) function in low-power shutdown mode?
When the ON/OFF pin (Pin 8) of the NCP3064BPG is pulled below 1.0 V (or left floating), the device enters low-power shutdown with typical supply current ≤100 µA. Pulling Pin 8 above 2.2 V enables normal operation. This pin accepts logic-level signals up to 25 V, enabling direct interface with microcontrollers or system supervisors without level-shifting.
NCP3064BPG 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:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
NCP3064BPG FAQ
1.How can I place an order for NCP3064BPG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP3064BPG 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 NCP3064BPG reliable?
The price and inventory of NCP3064BPG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP3064BPG is usually 5 days.
3.What payment methods are accepted for NCP3064BPG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP3064BPG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP3064BPG?
NCP3064BPG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP3064BPG 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 NCP3064BPG?
For technical support, including NCP3064BPG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP3064BPG requirements.
6.How does Aetrix verify that NCP3064BPG is sourced from the original manufacturer or authorized distributors?
All NCP3064BPG 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 NCP3064BPG meets industry standards.
7.What is the process for return or replacement of NCP3064BPG?
All NCP3064BPG units undergo pre-shipment inspection (PSI). If there is an issue with NCP3064BPG, 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 NCP3064BPG part is unused and in its original packaging.
Return procedure for NCP3064BPG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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