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onsemi NCP3064MNTXG
- Part No.:
- NCP3064MNTXG
- Manufacturer:
- onsemi
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
NCP3064MNTXG.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,849
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Product details
Overview
NCP3064MNTXG 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 NCP3064MNTXG datasheet, pinout, applications, or equivalent options, key selection criteria include peak switch current (1.5 A), timing capacitor-based frequency programming, cycle-by-cycle current limiting at 200 mV sense threshold, thermal shutdown at 160 °C, and DFN-8 package compatibility with high-density layouts.
Technical Context
The NCP3064MNTXG implements a hysteretic, gated-oscillator topology where output voltage regulation is achieved via feedback comparator control of switch conduction cycles - not traditional error-amplifier compensation. Its oscillator frequency (110–190 kHz) is set by external CT capacitance and internally biased with 6:1 charge/discharge current ratio.
Current limiting operates cycle-by-cycle using a dedicated Ipk sense comparator monitoring voltage across an external Rsense resistor; turn-off triggers at 200 mV (typical), independent of load or input conditions. Thermal shutdown activates at 160 °C with 10 °C hysteresis, disabling the Darlington switch until junction temperature falls below 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 buck/boost designs. |
| Oscillator Frequency | 150 kHz typical (110–190 kHz range) - balances EMI, inductor size, and efficiency for general-purpose DC-DC applications. |
| Reference Voltage | 1.25 V ±1.5% - provides stable feedback threshold for precise output voltage setting across temperature and line variations. |
| Current Limit Threshold | 200 mV (typical) at Ipk pin - sets peak switch current via external Rsense; enables predictable overcurrent protection without sensing resistors exceeding 0.133 Ω at 1.5 A. |
| Standby Current | 100 µA typical - ensures ultra-low quiescent consumption during ON/OFF pin low-state shutdown for battery-critical systems. |
| Thermal Shutdown | 160 °C activation with 10 °C hysteresis - protects die integrity under sustained overload or poor heatsinking without requiring external thermal management. |
Pinout & Package
Package: DFN-8 (4 mm × 4 mm, 0.8 mm pitch, exposed thermal pad). Pin 4 is GND and must be soldered to PCB ground plane for thermal and electrical performance. EP flag (exposed pad) is electrically connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Switch Collector (SWC) | Darlington transistor collector output | High-side switching node; connects to inductor/diode in buck/boost/inverting topologies; rated for 40 V max VSWCE. |
| 2 - Switch Emitter (SWE) | Darlington transistor emitter output | Return path for switch current; tied to GND or input rail depending on topology; voltage drop ≤1.3 V at 1.0 A. |
| 3 - Timing Capacitor (CT) | Oscillator timing input | Controls switching frequency via external capacitor; sawtooth waveform generated with 1.65 mA discharge / 275 µA charge current. |
| 4 - GND | Ground reference for all internal circuits | Primary return path; must be low-impedance connection to PCB ground plane; EP pad ties here for thermal dissipation. |
| 5 - Comparator Inverting Input (COMP) | Feedback voltage input to error comparator | Compares divided output voltage against 1.25 V reference; determines switch enable/disable timing for regulation. |
| 6 - VCC | Power supply input | Bias supply for internal circuitry; accepts 3.0–40 V; powers oscillator, reference, and drivers; may feed Rsense network. |
| 7 - Ipk Sense (Ipk) | Peak current limit comparator input | Monitors voltage drop across external Rsense; trips latch when >200 mV to terminate switch conduction per cycle. |
| 8 - ON/OFF | Logic-controlled shutdown input | Pull ≤1.0 V or float to disable switching and reduce ICC to <100 µA; pull ≥2.2 V to enable operation; TTL-compatible. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output voltage | Set via external resistor divider on COMP pin - supports any output from ~1.25 V up to VIN − VSWCE in buck, or inverted magnitudes in other topologies. |
| Cycle-by-cycle current limiting | Hardware-based protection that disables switch each cycle if Rsense voltage exceeds 200 mV - prevents cumulative thermal stress during short-circuit or overload. |
| Internal 1.25 V precision reference | ±1.5% tolerance over full operating temperature range - eliminates need for external reference and improves output accuracy without trimming. |
| Logic-level ON/OFF control | Compatible with 3.3 V or 5 V microcontrollers - enables simple PWM dimming, system sleep/wake, or fault-induced shutdown without level-shifting. |
| Thermal shutdown with hysteresis | Auto-recovery at 150 °C after 160 °C trip - avoids thermal oscillation and allows safe restart after transient overheating events. |
Applications
| LED Driver Power Supply | Battery Charger Control |
|---|---|
|
Use Scenario: Constant-current LED driver for automotive interior lighting or portable displays powered from 12 V battery. IC Role / Device Role / Timing Role: Buck regulator controlling LED string current via feedback loop; ON/OFF pin synchronized to MCU PWM for dimming. Use Value: Delivers stable 3.3 V/1.25 A output with <85 mV ripple (tested), enabling flicker-free illumination without external current-sense amplifiers. |
Use Scenario: Single-cell Li-ion charger with adjustable constant-voltage stage powered from USB or wall adapter. IC Role / Device Role / Timing Role: Boost converter generating 4.2 V from 5 V input; COMP pin configured for voltage regulation; Ipk pin limits charge current. Use Value: Achieves 86% efficiency at 200 mA output (tested), with line regulation <3 mV - maintains tight CV accuracy across input voltage variation. |
| Industrial Sensor Node PSU | Inverting Rail Generator |
|
Use Scenario: Low-power 3.3 V supply for wireless sensor nodes operating from 9–16 V industrial bus. IC Role / Device Role / Timing Role: Step-down regulator with ON/OFF pin controlled by host MCU to minimize idle power; CT pin sets 150 kHz for compact LC filter. Use Value: Standby current <100 µA extends battery life; thermal shutdown prevents failure during enclosure overheating in unventilated enclosures. |
Use Scenario: Generating −5 V rail from +12 V for op-amp biasing in analog signal conditioning circuits. IC Role / Device Role / Timing Role: Inverting converter topology; SWC and SWE pins reconfigured as switching node and virtual ground; COMP pin referenced to GND. Use Value: Supports full −5 V @ 0.6 A output with <350 mV ripple (tested); eliminates need for dual-output transformers or isolated DC-DC modules. |
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; 0.5 A switch; 52 kHz frequency; no ON/OFF pin; TO-220/SOIC-8 packages only | Limited to fixed-output step-down; unsuitable for boost/inverting or programmable voltage designs | Select when fixed 5 V output and lower cost outweigh flexibility and higher current needs. |
| MP1584EN-LF-Z | 4 A switch; 1.5 MHz frequency; integrated soft-start; requires external compensation; SOIC-8 only | Higher frequency enables smaller magnetics but increases EMI sensitivity; no inverting capability | Prefer for high-efficiency, space-constrained buck-only designs needing >1.5 A output. |
Compared with LM2574N-5.0 and MP1584EN-LF-Z, the NCP3064MNTXG uniquely supports all three topologies (buck/boost/inverting) with 1.5 A capability and logic-level shutdown in a thermally enhanced DFN-8 package - making it optimal for multi-rail, battery-powered, or retrofit power designs where topology flexibility and low standby power are critical.
Availability
NCP3064MNTXG is available at Aetrix Electronics and suitable for industrial sensor nodes, LED lighting drivers, battery charger controllers, and inverting rail generators requiring stable component supply and long-term manufacturability.
Supply support for NCP3064MNTXG 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 intelligent power solutions.
The NCP3064MNTXG belongs to onsemi's legacy monolithic DC-DC converter family designed for cost-sensitive, medium-power applications requiring topology flexibility, robust protection, and minimal external components - especially where upgrade paths from MC34063A are needed.
FAQ
What topologies does the NCP3064MNTXG support?
The NCP3064MNTXG supports buck (step-down), boost (step-up), and voltage-inverting converter topologies using the same IC and minimal external components. Its Darlington switch, feedback comparator, and oscillator architecture allow reconfiguration via external passive networks - as verified in Figures 16 (buck), 20 (boost), and 24 (inverting) of the official datasheet. No firmware or configuration registers are required.
What is the maximum output current achievable with the NCP3064MNTXG?
The NCP3064MNTXG integrates a Darlington switch rated for 1.5 A peak current. In practical buck configurations, tested output current reaches 1.25 A (Table 1), while boost achieves 0.6 A (Table 4). With external PMOS transistor augmentation (Figure 24), output current scales to 3.0 A (Table 7) - confirmed by onsemi's demo board testing and thermal characterization in the datasheet.
How does the ON/OFF pin function on the NCP3064MNTXG?
The ON/OFF pin of the NCP3064MNTXG enables logic-level shutdown: pulling it ≤1.0 V (or leaving it floating) disables switching and reduces supply current to <100 µA; pulling it ≥2.2 V enables normal operation. It is TTL-compatible and tolerates up to 25 V, allowing direct interface with microcontrollers or open-drain drivers without level shifters - as specified in the Electrical Characteristics table (VIH/VIL).
Can the NCP3064MNTXG operate with input voltages below 3.0 V?
No - the absolute minimum input voltage for the NCP3064MNTXG is 3.0 V, as defined in the Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this threshold risks improper startup, unstable regulation, or failure to activate the internal reference and oscillator. For sub-3 V applications, alternative regulators such as the NCP302LSN33T1G (2.7 V min) should be evaluated.
What package type and thermal characteristics apply to the NCP3064MNTXG?
The NCP3064MNTXG uses the DFN-8 (4 mm × 4 mm) package (Case 488AF) with an exposed thermal pad tied to GND. Its thermal resistance is RJA = 78 °C/W and RJC = 14 °C/W (per datasheet page 3), enabling higher power dissipation than the SOIC-8 variant. The exposed pad must be soldered to a PCB ground plane for optimal thermal performance and electrical stability.
NCP3064MNTXG 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:
- 0°C ~ 70°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (4x4)
NCP3064MNTXG FAQ
1.How can I place an order for NCP3064MNTXG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP3064MNTXG 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 NCP3064MNTXG reliable?
The price and inventory of NCP3064MNTXG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP3064MNTXG is usually 5 days.
3.What payment methods are accepted for NCP3064MNTXG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP3064MNTXG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP3064MNTXG?
NCP3064MNTXG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP3064MNTXG 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 NCP3064MNTXG?
For technical support, including NCP3064MNTXG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP3064MNTXG requirements.
6.How does Aetrix verify that NCP3064MNTXG is sourced from the original manufacturer or authorized distributors?
All NCP3064MNTXG 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 NCP3064MNTXG meets industry standards.
7.What is the process for return or replacement of NCP3064MNTXG?
All NCP3064MNTXG units undergo pre-shipment inspection (PSI). If there is an issue with NCP3064MNTXG, 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 NCP3064MNTXG part is unused and in its original packaging.
Return procedure for NCP3064MNTXG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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