Microchip Technology

TC1121CPA  

DC Switching Voltage Regulators

TC1121CPA Description

The TC1121CPA is a fixed-output, negative configuration DC switching voltage regulator from Microchip Technology, designed to provide a stable 100mA output current. This regulator operates within an input voltage range of 2.4V to 5.5V, making it suitable for a variety of low-voltage applications. The device features a ratiometric function, ensuring that the output voltage is proportional to the input voltage, which is particularly useful in applications where the input voltage may vary.

The TC1121CPA employs a charge pump topology, which allows for efficient power conversion within a switching frequency range of 10kHz to 200kHz. This wide frequency range provides flexibility in design and helps to minimize the size of external components. The regulator is housed in a through-hole package, specifically an 8-pin DIP (Dual In-line Package), which is ideal for applications requiring robust mechanical stability and ease of installation on printed circuit boards.

TC1121CPA Features

• Fixed Output Configuration: Provides a stable and predictable output voltage, simplifying design considerations.
• Wide Input Voltage Range (2.4V to 5.5V): Ensures compatibility with a variety of power sources, enhancing the versatility of the regulator.
• 100mA Output Current: Sufficient for driving small to medium-sized loads, making it suitable for a range of applications.
• Negative Output Configuration: Ideal for applications requiring a negative voltage supply, such as in certain analog circuits.
• Ratiometric Function: Maintains a consistent output-to-input voltage ratio, which is beneficial in systems with variable input voltages.
• Charge Pump Topology: Offers high efficiency and compact design, reducing the need for large external components.
• Switching Frequency Range (10kHz to 200kHz): Provides flexibility in choosing the switching frequency to optimize performance and minimize electromagnetic interference (EMI).
• Through-Hole Mounting: Ensures mechanical stability and ease of integration into existing PCB designs.
• Compliance and Safety: ROHS3 compliant and REACH unaffected, ensuring environmental and regulatory compliance. The device also has a Moisture Sensitivity Level (MSL) of 1, making it suitable for unlimited storage and handling conditions.
• Operating Temperature Range (0°C to 70°C): Suitable for use in a variety of ambient conditions, ensuring reliable performance in typical industrial and consumer environments.

TC1121CPA Applications

The TC1121CPA is well-suited for applications that require a stable and efficient negative voltage supply. Some specific use cases include:

• Analog Circuits: Ideal for powering operational amplifiers, ADCs, and DACs that require a negative supply voltage.
• Consumer Electronics: Suitable for portable devices and peripherals that operate within the specified input voltage range and require a negative voltage rail.
• Industrial Control Systems: Can be used in control systems where a stable negative voltage is needed for sensors and actuators.
• Medical Devices: Applicable in medical equipment that requires precise voltage regulation and compliance with stringent environmental standards.

Conclusion of TC1121CPA

The TC1121CPA from Microchip Technology is a robust and versatile DC switching voltage regulator designed to meet the needs of applications requiring a negative voltage supply. Its wide input voltage range, fixed output configuration, and charge pump topology make it an efficient and reliable choice. The device's compliance with environmental and regulatory standards, along with its through-hole mounting type, ensures ease of integration and long-term reliability. While the product is now obsolete, it remains a valuable component for existing designs and legacy systems. For new designs, engineers may consider exploring alternative models that offer similar performance benefits and enhanced features.

TC1121CPA Documents

Download datasheets and manufacturer documentation for TC1121CPA

Datasheets :

TC1121      

PCN Packaging :

Label and Packing Changes 23/Sep/2015      

Design Resources :

TC1121 Development Tool Selector      

PCN Obsolescence/ EOL :

Multiple Devices 22/Feb/2011      

HTML Datasheet :

TC1121      

Environmental Information :

Microchip CA Prop65       Microchip RoHS       Microchip REACH