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onsemi NCP3064DR2G
- Part No.:
- NCP3064DR2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
NCP3064DR2G.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,835
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Product details
Overview
NCP3064DR2G 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 1.5 A Darlington output switch, 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 NCP3064DR2G datasheet, pinout, applications, or equivalent options, key selection considerations include its adjustable output voltage capability, thermal shutdown threshold (160 °C), standby current (<100 µA), peak switch current rating (1.5 A), and SOIC-8 package compatibility with standard PCB layouts.
Technical Context
The NCP3064DR2G implements a hysteretic, gated-oscillator-based regulation architecture that eliminates the need for dominant-pole loop compensation. Its internal comparator monitors feedback voltage against a 1.25 V reference, while the oscillator's timing capacitor (Pin 3) sets frequency via a 1:6 charge/discharge current ratio.
Current limiting is enforced cycle-by-cycle using an external sense resistor and the Ipk pin (Pin 7), with a nominal 200 mV trip threshold. The Darlington output stage (Pins 1 and 2) delivers up to 1.5 A with typical VSWCE = 1.0 V at 1.0 A and 25 °C, and includes integrated thermal shutdown 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 continuous - enables direct drive of medium-power converters without external MOSFETs in many cases. |
| Oscillator Frequency | 150 kHz typical (110–190 kHz range) - balances EMI, efficiency, and passive component size for cost-sensitive designs. |
| Reference Voltage | 1.25 V ±1.5% - provides stable feedback threshold for accurate output voltage regulation across temperature. |
| Standby Current | <100 µA at TJ = 25 °C - ensures ultra-low power consumption during shutdown mode. |
| Current Limit Threshold | 200 mV typical at Pin 7 - sets peak switch current via external Rsense; enables precise overcurrent protection. |
| Thermal Shutdown | 160 °C activation with 10 °C hysteresis - prevents permanent damage under sustained overload or poor heatsinking. |
Pinout & Package
Package: SOIC-8 (Case 751-07), Pb-free, surface-mount. Exposed pad not present; standard SOIC thermal performance (RJA = 180 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SWC) | Switch Collector | Collector terminal of internal Darlington transistor; connects to inductor/switching node in buck/boost topologies. |
| 2 (SWE) | Switch Emitter | Emiter terminal of internal Darlington; serves as return path for switch current and connection point for Rsense in current-mode control. |
| 3 (CT) | Timing Capacitor | Oscillator timing input; CT value directly sets switching frequency (e.g., 2.2 nF → 150 kHz). |
| 4 (GND) | Ground | Common reference for all internal circuits; must be low-impedance connection to minimize noise and ensure stability. |
| 5 (COMP) | Comparator Inverting Input | Feedback node for output voltage regulation; connected to resistor divider from VOUT to set regulated output. |
| 6 (VCC) | Voltage Supply | Primary power input (3–40 V); powers internal bias, oscillator, and gate driver circuits. |
| 7 (Ipk) | Peak Current Sense | Inputs voltage drop across external Rsense; triggers cycle-by-cycle current limit when ≥200 mV. |
| 8 (ON/OFF) | Enable/Shutdown Control | Logic-level input: >2.4 V (typ.) enables operation; ≤1.0 V (typ.) forces standby mode with <100 µA ICC. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Voltage | Enabled via external resistor divider on COMP pin - supports custom VOUT from ~1.25 V to >40 V depending on topology. |
| Integrated Darlington Switch | 1.5 A rated output stage eliminates need for external high-current transistors in many buck/boost/inverting designs. |
| Cycle-by-Cycle Current Limiting | Hardware-based protection triggered by Ipk pin - prevents switch failure during short-circuit or overload without software intervention. |
| Logic-Level ON/OFF Control | Compatible with 3.3 V or 5 V microcontrollers - allows simple PWM dimming or system-level power sequencing. |
| Precision Reference | 1.25 V ±1.5% over temperature - ensures tight output regulation without external trimming components. |
Applications
| LED Driver Power Supply | Battery Charger Controller |
|---|---|
|
Use Scenario: Constant-current LED string driver in automotive interior lighting or industrial signage requiring 3.3 V or 12 V input and 24 V output. IC Role / Device Role / Timing Role: Primary DC-DC controller implementing boost topology with adjustable current limit via Rsense and COMP feedback. Use Value: Enables single-chip solution with 86% efficiency at 200 mA output (Vin=12 V, Vout=24 V), reducing BOM count vs. discrete switch + controller approaches. |
Use Scenario: 12 V lead-acid or Li-ion battery charging circuit with programmable constant-voltage/constant-current profile. IC Role / Device Role / Timing Role: Regulates charging voltage/current using COMP feedback and Ipk sensing; ON/OFF pin enables charge enable/disable from host MCU. Use Value: Supports full-charge termination via voltage regulation accuracy (±1.5%) and safe current limiting (200 mV threshold), eliminating need for dedicated charger IC. |
| Industrial Step-Down Converter | Inverting Rail Generator |
|
Use Scenario: 24 V to 3.3 V conversion for microcontroller power in factory automation sensors with wide input tolerance. IC Role / Device Role / Timing Role: Buck regulator with external inductor/diode; GND-referenced output; uses VCC as input and SWC/SWE as switching node. Use Value: Delivers 1.25 A output with 70% efficiency at 500 mA (Vin=12 V), leveraging integrated 1.5 A switch and low-quiescent standby current for intermittent operation. |
Use Scenario: Generation of negative rail (e.g., –5 V or –12 V) from positive supply in analog signal conditioning or op-amp biasing circuits. IC Role / Device Role / Timing Role: Voltage-inverting converter where SWE is tied to VOUT and SWC connects to ground-referenced inductor/capacitor network. Use Value: Provides compact, low-cost inverter topology without external switch - demonstrated in datasheet Figure 24 with validated ripple & regulation performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34063AP1G | Lower max switch current (1.5 A same), but only 100 kHz oscillator; no integrated thermal shutdown; wider VCC range (−0.3 to 40 V). | Less suitable for high-efficiency or thermally constrained designs; requires external thermal protection if used near limits. | Select MC34063AP1G only when legacy compatibility or lower cost outweighs need for thermal safety and tighter reference. |
| NCP3063DR2G | Same pinout and feature set, but 100 kHz oscillator (vs. 150 kHz); identical 1.5 A switch and 1.25 V reference; shares SOIC-8 package. | Better suited for EMI-sensitive environments where lower frequency reduces conducted emissions; may require larger magnetics. | Choose NCP3063DR2G when board layout or regulatory testing favors lower switching frequency and reduced filter complexity. |
Compared with MC34063AP1G and NCP3063DR2G, the NCP3064DR2G offers higher-frequency operation for smaller passives, integrated thermal shutdown for robustness, and tighter reference tolerance - making it preferable for new designs prioritizing reliability and space-constrained layouts.
Availability
NCP3064DR2G is available at Aetrix Electronics and suitable for industrial power supplies, LED lighting drivers, and battery charging systems requiring stable component supply, long-term manufacturability, and automotive-grade variants (NCV3064DR2G) for extended temperature support.
Supply support for NCP3064DR2G 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, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCP3064DR2G belongs to onsemi's monolithic DC-DC converter product line, engineered to replace legacy MC33063/MC34063 designs with enhanced frequency, precision, and protection features for cost-sensitive yet reliable power conversion.
FAQ
What is the maximum input voltage supported by the NCP3064DR2G?
The NCP3064DR2G supports a maximum input voltage of 40 V on the VCC pin (Pin 6), with absolute maximum ratings specifying −0.3 V to 42 V. This allows direct operation from 24 V industrial rails or 36 V battery systems without external regulators, provided the Darlington switch voltage rating (VSWCE ≤ 42 V) is respected in the chosen topology.
Can the NCP3064DR2G be used in a buck-boost configuration?
Yes, the NCP3064DR2G is explicitly designed for buck-boost and voltage-inverting topologies, as confirmed in its datasheet title and Applications section. Its Darlington switch and flexible feedback architecture allow implementation of non-inverting buck-boost (e.g., SEPIC-like) and inverting configurations using standard external components - demonstrated in Figures 16, 20, and 24 of the official datasheet.
What is the purpose of the Ipk pin (Pin 7) on the NCP3064DR2G?
The Ipk pin (Pin 7) on the NCP3064DR2G senses the voltage drop across an external current-sense resistor (Rsense) placed between VCC and the Darlington switch emitter. When this voltage reaches ~200 mV, the internal comparator triggers cycle-by-cycle current limiting, turning off the switch to protect against overcurrent - a hardware-based safety feature critical for reliability in unregulated loads.
Does the NCP3064DR2G require external compensation components?
No, the NCP3064DR2G uses a hysteretic, gated-oscillator control architecture that does not require external compensation networks. Its stability is inherent to the design, eliminating the need for loop compensation capacitors or resistors - simplifying layout and reducing BOM count compared to voltage-mode or current-mode controllers requiring Type II/III compensation.
Is the NCP3064DR2G pin-compatible with the MC34063A?
Yes, the NCP3064DR2G is pin-compatible with the MC34063A in SOIC-8 package (D suffix), sharing identical pin assignments for VCC, GND, COMP, CT, SWC, SWE, Ipk, and ON/OFF. This enables drop-in replacement in existing MC34063A designs to gain benefits of higher frequency (150 kHz vs. 100 kHz), tighter reference (±1.5% vs. ±2%), and integrated thermal shutdown.
NCP3064DR2G 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
- 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
NCP3064DR2G FAQ
1.How can I place an order for NCP3064DR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP3064DR2G 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 NCP3064DR2G reliable?
The price and inventory of NCP3064DR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP3064DR2G is usually 5 days.
3.What payment methods are accepted for NCP3064DR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP3064DR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP3064DR2G?
NCP3064DR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP3064DR2G 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 NCP3064DR2G?
For technical support, including NCP3064DR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP3064DR2G requirements.
6.How does Aetrix verify that NCP3064DR2G is sourced from the original manufacturer or authorized distributors?
All NCP3064DR2G 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 NCP3064DR2G meets industry standards.
7.What is the process for return or replacement of NCP3064DR2G?
All NCP3064DR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP3064DR2G, 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 NCP3064DR2G part is unused and in its original packaging.
Return procedure for NCP3064DR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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