Overview
The NCP3064DR2G, produced by onsemi, is a monolithic power switching regulator designed for DC-DC converter applications. This device is an upgrade to the popular MC33063A and MC34063A monolithic DC-DC converters, offering higher frequency operation and enhanced features. It is optimized for step-down, step-up, and voltage-inverting converter applications with a minimal number of external components.
The NCP3064 series includes internal components such as a temperature-compensated reference, comparator, controlled duty cycle oscillator, active current limit circuit, driver, and a high current output switch. This makes it suitable for a wide range of applications, including cost-sensitive consumer products and industrial equipment.
Key Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Input Voltage Range | VCC | 3.0 to 40 | V |
| Output Switch Current | ISW | 1.5 | A |
| Oscillator Frequency | fOSC | 110 to 190 | kHz |
| Current Limit Sense Voltage | VIPK | 165 to 235 | mV |
| Darlington Switch Collector to Emitter Voltage Drop | VSWCE | 1.0 to 1.3 | V |
| Threshold Voltage | VTH | 1.25 | V |
| Maximum Junction Temperature | TJ MAX | +150 | °C |
| Storage Temperature Range | TSTG | -65 to +150 | °C |
Key Features
- Input Voltage Range from 3.0 V to 40 V
- Logic Level Shutdown Capability
- Low Power Standby Mode, Typical 100 μA
- Adjustable Output Voltage Range
- 150 kHz Frequency Operation
- Precision 1.5% Reference Voltage
- Internal Temperature Compensated Reference, Comparator, and Controlled Duty Cycle Oscillator
- Active Current Limit Circuit and High Current Output Switch
- ON/OFF Pin for Low Power Shutdown Mode
Applications
The NCP3064DR2G is versatile and can be used in various DC-DC converter applications, including:
- Step-Down (Buck) Converters: Suitable for applications requiring a lower output voltage than the input voltage.
- Step-Up (Boost) Converters: Ideal for applications needing a higher output voltage than the input voltage.
- Voltage-Inverting Converters: Used in applications where a negative output voltage is required relative to the input voltage.
- Cost-Sensitive Consumer Products: Such as power supplies for consumer electronics.
- Industrial Equipment: Including power supplies for industrial control systems and machinery.
The device can also be used with external transistors to increase output current and efficiency, and to achieve higher operating frequencies up to 250 kHz.
Q & A
- What is the input voltage range of the NCP3064DR2G?
The input voltage range is from 3.0 V to 40 V.
- What is the typical oscillator frequency of the NCP3064DR2G?
The typical oscillator frequency is around 150 kHz.
- How does the ON/OFF pin function in the NCP3064DR2G?
The ON/OFF pin allows for logic level shutdown capability. Pulling this pin to a high level turns the device on, while a low level or floating state switches it into a low current consumption mode.
- What is the maximum output switch current of the NCP3064DR2G?
The maximum output switch current is 1.5 A.
- Can the NCP3064DR2G be used for voltage-inverting applications?
- How does the device handle thermal management?
The device has specified thermal resistance values for junction-to-air and junction-to-case, and it operates within a junction temperature range of -40°C to +125°C for the NCP3064B and NCV3064 models.
- What is the purpose of the timing capacitor in the NCP3064DR2G?
The timing capacitor programs the oscillator frequency and off-time of the output switch, generating a positive going sawtooth waveform.
- Can the NCP3064DR2G be used with external components to enhance performance?
- What is the typical standby current of the NCP3064DR2G in low power mode?
The typical standby current in low power mode is 100 μA.
- How does the pulse feedback resistor affect the oscillator frequency?
The pulse feedback resistor can increase the operating frequency by up to 50% and create more regular switching waveforms, resulting in lower ripple voltage and improved efficiency.
