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MC34063A
+BOM1.5A STEP DOWN 2% 180KHZ 3V-36V
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ManufacturerShenzhen Slkormicro Semicon Co., Ltd.
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Mfr. Part #MC34063A
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In Stock29231
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Specifications
| Attribute | Value |
| Part Status | Active |
Overview
Description
Key features include a switching frequency of up to 100 kHz, adjustable output voltage, and current limiting. With a simple external configuration, the MC34063A can deliver output currents up to 1.5A, depending on the configuration and external components used. It is particularly valued for its low cost and flexibility, often employed in battery-powered devices, automotive applications, and small power supplies. Its ease of use makes it popular among hobbyists and engineers for prototyping and development in various electronic circuits.
Equivalent
1. LM2575
2. LM2596
3. LMC7660
4. NCP3063
5. MC33063A
These alternatives generally serve similar functions in converting voltage levels, though specifications such as input voltage range, output current, and efficiency may vary. Always verify the datasheet for compatibility with your specific application.
Features
1. Wide Input Voltage Range: Operates from 3.0V to 40V, making it suitable for various applications.
2. Output Switch Current: Capable of delivering up to 1.5A of output switch current.
3. Adjustable Output Voltage: Allows users to achieve desired output voltage through external components.
4. Internal Frequency Oscillator: Features a 100 kHz oscillator, which can be adjusted with external timing capacitors.
5. Current Limiting: Includes internal current limiting to protect the circuit from overload conditions.
6. Output Voltage Regulation: Offers good line and load regulation, enhancing performance stability.
7. Protection Features: Thermal shutdown and current limiting enhance reliability and safety.
These features make the MC34063A a cost-effective solution for power supply designs, particularly in battery-powered and automotive applications. Its flexibility and efficiency simplify the design process for engineers requiring DC-DC conversion.
Pinout
1. Switch Collector (SWC): Connects to the inductor and the diode for switching applications.
2. Switch Emitter (SWE): Connects to the ground, serving as the ground return for the switch.
3. Timing Capacitor (TCAP): Used to set the oscillator frequency by connecting a capacitor between this pin and ground.
4. Ground (GND): Ground reference for the IC.
5. Comparator Inverting Input (CMP-): Receives the feedback voltage from the output.
6. VCC: Power supply input for the IC.
7. Ipk Sense (IPK): Used to limit the peak current through the switch by sensing the voltage across an external resistor.
8. Driver Collector (DC): Provides drive to the external transistor's base.
This IC is widely used due to its simplicity, low cost, and the minimal number of external components required.