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onsemi NCP3064BMNTXG
- Part No.:
- NCP3064BMNTXG
- Manufacturer:
- onsemi
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
NCP3064BMNTXG.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,960
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Product details
Overview
NCP3064BMNTXG from onsemi is a monolithic DC-DC switching regulator IC supporting buck, boost, and inverting topologies with an internal 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 delivers regulated outputs for cost-sensitive industrial and consumer power supplies.
For engineers reviewing the NCP3064BMNTXG datasheet, pinout, applications, or equivalent options, key selection criteria include its adjustable output voltage range, cycle-by-cycle current limiting at 200 mV sense threshold, thermal shutdown at 160 °C, standby current under 100 µA, and DFN-8 package compatibility with high-density PCB layouts.
Technical Context
The NCP3064BMNTXG implements a hysteretic, gated-oscillator architecture where output regulation is achieved by enabling/disabling switch conduction per oscillator cycle based on feedback comparator output - eliminating need for external loop compensation. Its timing capacitor (Pin 3) sets oscillator frequency via a 1:6 charge/discharge current ratio, yielding typical 150 kHz operation with 2.2 nF CT.
Current limiting is enforced via a dedicated Ipk Sense comparator (Pin 7) monitoring voltage across an external sense resistor; conduction terminates when sensed voltage exceeds 200 mV (typ), providing cycle-by-cycle protection. Thermal shutdown activates at 160 °C with 10 °C hysteresis, disabling the Darlington switch until junction temperature falls to ~150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 40 V - supports wide-input industrial and automotive battery-supplied systems without pre-regulation. |
| Switch Current Rating | 1.5 A peak - enables direct drive of medium-power converters without external MOSFETs in many applications. |
| Oscillator Frequency | 150 kHz (typ) - balances efficiency and component size; programmable via external CT capacitor. |
| Reference Voltage | 1.25 V ±1.5% - provides stable feedback threshold for precise output voltage setting with external resistor divider. |
| Current Limit Threshold | 200 mV (typ) at Pin 7 - defines peak switch current as IPK = 0.2 V / RSENSE, enabling accurate overcurrent protection. |
| Standby Current | <100 µA at TJ = 25 °C - ensures ultra-low quiescent consumption during shutdown mode. |
| Thermal Shutdown | 160 °C activation with 10 °C hysteresis - protects against sustained overload or poor heatsinking without latch-up. |
Pinout & Package
Package: DFN-8 (4 mm × 4 mm, 0.8 mm pitch, exposed thermal pad); RoHS-compliant, Pb-free; case 488AF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Switch Collector | Collector of internal Darlington transistor | High-side switching node; connects to inductor/transformer primary in buck/boost/inverting topologies. |
| 2 - Switch Emitter | Emiter of internal Darlington transistor | Return path for switch current; tied to GND in buck configuration, to input in boost/inverting. |
| 3 - Timing Capacitor | Oscillator timing input | Controls switching frequency via external capacitor; charge/discharge current ratio sets duty cycle limit. |
| 4 - GND | Ground reference for all internal circuits | Must connect to low-impedance system ground; EP pad (exposed thermal pad) must also be tied to GND for thermal performance. |
| 5 - Comparator Inverting Input | Inverting input of feedback error amplifier | Connects to resistor divider from output; compares against 1.25 V reference to regulate output voltage. |
| 6 - VCC | Power supply input | Supplies internal circuitry; must be bypassed with ≥1 µF ceramic capacitor near pin. |
| 7 - Ipk Sense | Peak current sense input | Monitors voltage drop across external sense resistor; triggers cycle-by-cycle current limit when >200 mV. |
| 8 - ON/OFF | Logic-controlled enable/disable input | Pull ≤0.8 V or float to disable (standby); pull ≥2.4 V to enable; compatible with TTL/CMOS logic levels. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Topology Support | Enables step-down (buck), step-up (boost), and voltage-inverting configurations using same IC and minimal external components. |
| Internal 1.5 A Darlington Switch | Eliminates need for external power transistor in sub-1.5 A applications, reducing BOM count and layout complexity. |
| 150 kHz Fixed-Frequency Oscillator | Provides predictable EMI profile and simplifies filter design; frequency settable via single CT capacitor. |
| 1.25 V ±1.5% Precision Reference | Ensures tight output voltage regulation across temperature and line variations without trimming. |
| Logic-Level ON/OFF Control | Supports direct interface with microcontrollers or logic gates; <100 µA shutdown current extends battery life. |
| Cycle-by-Cycle Current Limiting | Prevents switch destruction during short-circuit or overload by terminating each conduction cycle independently. |
Applications
| LED Driver Power Supply | Battery Charger Controller |
|---|---|
Use Scenario: Driving high-brightness LEDs from 12 V automotive or 24 V industrial rails with constant-current regulation. IC Role / Device Role / Timing Role: Acts as constant-current buck controller; uses feedback loop to regulate LED string current via sense resistor and comparator. Use Value: Enables compact, low-cost LED lighting with thermal foldback via integrated shutdown and no external compensation required. |
Use Scenario: Charging 3S Li-ion or lead-acid batteries from variable DC sources such as solar panels or USB-PD adapters. IC Role / Device Role / Timing Role: Configured as adjustable-output boost converter to generate precise charging voltage; ON/OFF pin enables charge enable/disable sequencing. Use Value: Delivers up to 1.5 A output with built-in current limiting and thermal protection, reducing risk of overcharge or thermal runaway. |
| Industrial Sensor Power Rail | Low-Cost Inverting Supply |
Use Scenario: Generating isolated ±5 V or ±3.3 V rails for analog sensor front-ends in PLC modules or IoT edge devices. IC Role / Device Role / Timing Role: Used in inverting topology to derive negative supply from positive input; feedback network sets exact output magnitude. Use Value: Provides rail-to-rail regulation stability across temperature and load, with <10 mV load regulation measured in demo boards. |
Use Scenario: Creating −5 V or −12 V auxiliary supply from +12 V main rail in embedded controllers or audio amplifiers. IC Role / Device Role / Timing Role: Functions as voltage-inverting DC-DC converter; internal Darlington switch handles full inverter current without external FET. Use Value: Achieves >70% efficiency at 500 mA output with minimal external parts - only inductor, diode, capacitor, and two resistors required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34063ADR2G | Lower max switch current (1.5 A vs. 1.5 A), but slower 100 kHz oscillator; no integrated thermal shutdown; wider VCC tolerance (−0.3 V to 40 V). | Less suitable for high-frequency or thermally constrained designs; requires external thermal protection circuitry. | Choose MC34063ADR2G only if legacy compatibility or lower cost is critical and thermal margin is ample. |
| NCP3063MNTXG | Same family, but 100 kHz oscillator (vs. 150 kHz); identical pinout and feature set except frequency and thermal shutdown threshold (150 °C vs. 160 °C). | Acceptable for lower-frequency designs where smaller inductors are not needed; slightly reduced thermal safety margin. | Select NCP3063MNTXG when board space allows larger magnetics and thermal derating is verified. |
Compared with MC34063ADR2G and NCP3063MNTXG, the NCP3064BMNTXG offers higher switching frequency for smaller passive components, tighter reference accuracy (±1.5% vs. ±2%), and superior thermal protection - making it preferable for new designs demanding density, precision, and robustness.
Availability
NCP3064BMNTXG is available at Aetrix Electronics and suitable for industrial sensor power rails, battery charger controllers, LED driver supplies, and low-cost inverting supplies requiring stable component supply and long-term manufacturability.
Supply support for NCP3064BMNTXG 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 consumer markets.
The NCP3064BMNTXG belongs to onsemi's legacy monolithic DC-DC converter product line, designed specifically to replace MC33063A/MC34063A with higher frequency, improved accuracy, and enhanced protection features for cost-sensitive power conversion.
FAQ
What is the maximum input voltage rating for the NCP3064BMNTXG?
The NCP3064BMNTXG supports a maximum input voltage of 40 V on the VCC pin (Pin 6) and Switch Collector pin (Pin 1), with absolute maximum ratings specified from −0.3 V to 42 V. Operation beyond 40 V risks permanent damage. The device is rated for continuous operation from 3.0 V to 40 V, making it suitable for 12 V, 24 V, and 36 V industrial and automotive systems. Always observe derating guidelines per ambient temperature and PCB thermal design.
Does the NCP3064BMNTXG require external compensation components?
No, the NCP3064BMNTXG does not require external compensation components. Its hysteretic, gated-oscillator architecture eliminates the need for dominant-pole loop compensation, enabling stable operation with only basic external components: inductor, diode, timing capacitor, feedback resistors, and input/output capacitors. This simplifies design, reduces BOM count, and improves reliability - confirmed in Figures 16–24 of the official datasheet where no compensation network appears in any reference schematic.
Can the NCP3064BMNTXG be used in a synchronous rectification configuration?
No, the NCP3064BMNTXG cannot be used in synchronous rectification configurations. It integrates only a single Darlington switch (NPN-based) and lacks complementary gate-drive outputs or timing control for external synchronous MOSFETs. Rectification must be performed using an external Schottky or fast-recovery diode, as shown in all reference schematics (Figures 16, 20, 24). For synchronous operation, consider onsemi's newer NCP3170 or NCP3021 families.
What is the thermal resistance of the NCP3064BMNTXG in its DFN-8 package?
The NCP3064BMNTXG in DFN-8 (case 488AF) has a thermal resistance of RJA = 78 °C/W and RJC = 14 °C/W, measured with 1 oz copper and 1 in² copper area per JEDEC standards. These values assume proper soldering of the exposed thermal pad (Pin 4 EP) directly to a solid GND plane. Failure to connect the EP pad degrades thermal performance significantly - RJA may exceed 120 °C/W in non-optimized layouts.
How does the ON/OFF pin function in the NCP3064BMNTXG?
The ON/OFF pin (Pin 8) of the NCP3064BMNTXG enables logic-level shutdown: pulling it ≤0.8 V (or leaving it floating) disables switching and reduces supply current to <100 µA; pulling it ≥2.4 V enables normal operation. It is TTL/CMOS compatible and supports PWM dimming up to 1 kHz. The pin must never exceed 25 V, and series resistance (e.g., 10 kΩ) is recommended if driven from a higher-voltage source to limit input current and shift threshold safely.
NCP3064BMNTXG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- 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:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (4x4)
NCP3064BMNTXG FAQ
1.How can I place an order for NCP3064BMNTXG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP3064BMNTXG 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 NCP3064BMNTXG reliable?
The price and inventory of NCP3064BMNTXG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP3064BMNTXG is usually 5 days.
3.What payment methods are accepted for NCP3064BMNTXG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP3064BMNTXG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP3064BMNTXG?
NCP3064BMNTXG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP3064BMNTXG 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 NCP3064BMNTXG?
For technical support, including NCP3064BMNTXG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP3064BMNTXG requirements.
6.How does Aetrix verify that NCP3064BMNTXG is sourced from the original manufacturer or authorized distributors?
All NCP3064BMNTXG 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 NCP3064BMNTXG meets industry standards.
7.What is the process for return or replacement of NCP3064BMNTXG?
All NCP3064BMNTXG units undergo pre-shipment inspection (PSI). If there is an issue with NCP3064BMNTXG, 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 NCP3064BMNTXG part is unused and in its original packaging.
Return procedure for NCP3064BMNTXG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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