Overview
The MC34063AMELG is a monolithic control circuit produced by onsemi, designed for DC-DC conversion applications. This device is part of the MC34063A series, which includes the primary functions necessary for step-down (buck), step-up (boost), and voltage-inverting DC-DC converters. It features an internal temperature-compensated reference, comparator, controlled duty cycle oscillator, active current limit circuit, driver, and a high current output switch. This makes it versatile for various power supply and voltage regulation needs with a minimal number of external components.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Power Supply Voltage | VCC | - | - | 40 | V |
| Switch Collector Voltage | VSWC | - | - | 40 | V |
| Switch Emitter Voltage | VSWE | - | - | 40 | V |
| Switch Collector to Emitter Voltage | VCE | - | - | 40 | V |
| Driver Collector Current | Idc | - | - | 100 | mA |
| Switch Current | ISW | - | - | 1.5 | A |
| Junction Temperature Range | TJ | -40 | - | 150 | °C |
| Storage Temperature Range | TSTG | -65 | - | 150 | °C |
| Input Voltage Range | - | 3 | - | 40 | V |
| Output Voltage Range | - | 1.55 | - | 40 | V |
| Output Current | - | - | - | 1.5 | A |
| Switching Frequency | - | - | - | 100 kHz | - |
| Quiescent Current | - | - | - | 2.5 mA (Typ.) | - |
| Package / Case | - | - | - | 8-SOIC | - |
Key Features
- Internal Temperature-Compensated Reference: Ensures stable operation across various temperatures.
- Comparator and Controlled Duty Cycle Oscillator: Allows for precise control over the switching frequency.
- Active Current Limit Circuit: Prevents overcurrent conditions and protects the device.
- High Current Output Switch: Capable of handling up to 1.5 A of output current.
- Low Quiescent Current: Typically 2.5 mA, reducing power consumption in standby mode.
- Adjustable Output Voltage: Output voltage can be set using two external resistors with a 2% reference accuracy.
- Operating Voltage Range: From 3 V to 40 V, making it versatile for various power supply applications.
- Switching Frequency up to 100 kHz: Supports high-frequency switching for efficient power conversion.
- Halogen-Free: Compliant with environmental regulations.
Applications
- Battery Chargers: Suitable for charging batteries with adjustable output voltage.
- Network Interface Cards (NICs), Switches, and Hubs: Used in networking equipment for power supply and voltage regulation.
- ADSL Modems: Provides the necessary power conversion for modem operations.
- Negative Voltage Power Supplies: Can be used to generate negative output voltages.
- Cigarette Lighter Adapters (CLA): Used in automotive accessories for power conversion.
- DC-DC Power Supplies: General-purpose power supplies for various electronic devices.
- Fan Controllers: Can be used to control fan speeds in electronic devices.
Q & A
- What is the maximum output current of the MC34063AMELG?
The maximum output current is 1.5 A.
- What is the operating voltage range of the MC34063AMELG?
The device operates from 3 V to 40 V.
- What is the switching frequency of the MC34063AMELG?
The switching frequency can go up to 100 kHz.
- What type of package does the MC34063AMELG come in?
The device comes in an 8-SOIC package.
- Does the MC34063AMELG have an internal temperature-compensated reference?
Yes, it does.
- What is the typical quiescent current of the MC34063AMELG?
The typical quiescent current is 2.5 mA.
- Can the MC34063AMELG be used for negative voltage power supplies?
Yes, it can be used for generating negative output voltages.
- What is the reference accuracy for the output voltage adjustment?
The reference accuracy is 2%.
- Is the MC34063AMELG halogen-free?
Yes, it is halogen-free.
- What are some common applications of the MC34063AMELG?
Common applications include battery chargers, network interface cards, ADSL modems, and DC-DC power supplies.
