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MC34063ECD
+BOMIC REG BUCK BST ADJ 1.5A 8SO
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ManufacturerSTMicroelectronics
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Mfr. Part #MC34063ECD
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Datasheet MC34063ECD DataSheet
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Package SOIC-8
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In Stock3353
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Specifications
| Attribute | Value |
| Package / Case | Tube |
| Part Status | Obsolete |
| 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) | 38V |
| Current - Output | 1.5A (Switch) |
| Frequency - Switching | 33kHz |
| Synchronous Rectifier | No |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Mounting Type | Surface Mount |
Overview
Description
Key features of the MC34063ECD include an internal temperature-compensated reference, a comparator, a controlled duty cycle oscillator, a driver, and a high-current output switch. It can deliver output currents up to 1.5A with proper external components. The MC34063ECD's switching frequency can be adjusted with an external timing capacitor, allowing customization for specific requirements.
The device also offers protection features such as current limiting and thermal shutdown, enhancing reliability and safety. Its ease of use and flexibility make the MC34063ECD a popular choice for designers looking to implement cost-effective and efficient power conversion solutions.
Equivalent
1. LM2575 - A step-down (buck) voltage regulator.
2. MC33063 - Similar to MC34063 but with broader temperature range.
3. XL6009 - A boost converter with higher efficiency.
4. NCP3063 - Offers similar functionality with improved features like higher output current.
5. SG3525 - Though primarily a PWM controller, it’s used in similar applications with additional circuitry.
These alternatives may vary in specifications and suitability based on the application.
Features
1. Wide Input Voltage Range: Operates from 3V to 40V, suitable for various power supply conditions.
2. Output Switching Frequency: Adjustable frequency up to 100 kHz, allowing for flexibility in design.
3. Output Current Capability: Can deliver up to 1.5A output current, making it suitable for moderate power applications.
4. Integrated Features: Includes a temperature-compensated reference, an internal oscillator, a current limiting circuit, and a driver for an external NPN switch.
5. Efficient Design: Provides a simple means to achieve efficient voltage conversion with minimal external components.
6. Low Standby Current: Offers low quiescent current, improving efficiency especially in battery-powered applications.
7. Cost-Effective: Provides a budget-friendly solution for numerous basic power management tasks.
These features make the MC34063ECD an excellent choice for a wide range of power supply applications, offering a balance between performance and cost.
Pinout
1. Pin 1 - Switch Collector: The collector of the internal switch transistor.
2. Pin 2 - Switch Emitter: The emitter of the internal switch transistor; used for the output rectification stage.
3. Pin 3 - Timing Capacitor: Connect a capacitor to set the oscillator frequency.
4. Pin 4 - Ground: The ground pin provides the return path for the IC.
5. Pin 5 - Comparator Inverting Input: The inverting input to the internal comparator.
6. Pin 6 - Voltage Reference Output: Provides a 1.25V reference voltage for regulation.
7. Pin 7 - VCC: The power supply input for the device.
8. Pin 8 - Ipk Sense: Current sense input for limiting the peak current through the switching transistor.
These pins support the IC’s capability to function in various converter topologies with minimal external components.