Overview
The MC34063ACD, produced by STMicroelectronics, is a monolithic control circuit designed for DC-DC voltage conversion. This device is part of the MC34063A/E series and integrates essential functions for step-down, step-up, and voltage-inverting applications. It features an internal temperature-compensated reference, comparator, duty cycle controlled oscillator, active current limit circuit, driver, and a high current output switch. The output voltage can be adjusted using two external resistors with a 2% reference accuracy.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Switch Current | In excess of 1.5 A | A |
| Reference Accuracy | 2% | % |
| Quiescent Current | 2.5 mA (typ.) | mA |
| Operating Voltage Range | 3 V to 40 V | V |
| Frequency Operation | Up to 100 kHz | kHz |
| Active Current Limiting | Yes | |
| Package Type | SO-8 | |
| Operating Temperature Range | 0°C to 70°C (Industrial Grade) | °C |
| Power Dissipation at TA = 25°C | 0.625 W (for SO-8 package) | W |
| Thermal Resistance Junction-Ambient | 160 °C/W (for SO-8 package) | °C/W |
Key Features
- High output switch current in excess of 1.5 A
- 2% reference accuracy for adjustable output voltage
- Low quiescent current of 2.5 mA (typ.)
- Operating voltage range from 3 V to 40 V
- Frequency operation up to 100 kHz
- Active current limiting for enhanced safety and reliability
- Minimum number of external components required for operation
Applications
The MC34063ACD is designed for various DC-DC conversion applications, including:
- Step-down (buck) converters
- Step-up (boost) converters
- Voltage-inverting converters
- Dual output voltage configurations
- Higher output power and higher input voltage applications
Q & A
- What is the maximum output switch current of the MC34063ACD?
The maximum output switch current is in excess of 1.5 A.
- What is the reference accuracy of the MC34063ACD?
The reference accuracy is 2%.
- What is the typical quiescent current of the MC34063ACD?
The typical quiescent current is 2.5 mA.
- What is the operating voltage range of the MC34063ACD?
The operating voltage range is from 3 V to 40 V.
- What is the maximum frequency operation of the MC34063ACD?
The maximum frequency operation is up to 100 kHz.
- Does the MC34063ACD have active current limiting?
Yes, it does have active current limiting.
- What package types are available for the MC34063ACD?
The MC34063ACD is available in SO-8 and DIP-8 packages.
- What is the operating temperature range for the MC34063ACD?
The operating temperature range is 0°C to 70°C for the Industrial Grade.
- What are the typical applications of the MC34063ACD?
Typical applications include step-down, step-up, and voltage-inverting converters, as well as dual output voltage configurations.
- How is the output voltage adjusted in the MC34063ACD?
The output voltage is adjustable through two external resistors with a 2% reference accuracy.
