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TPS60120PWPR Application Field and Working Principle

The TPS60120PWPR is a DC-DC switching regulator. It is used to convert power from a high input voltage source (typically batteries, dc-dc converters, or solar panel) to low output voltage while providing maximum efficiency and noise immunity. It supports a wide input voltage range and output voltages up to 20V, as well as a wide range of load currents.

The TPS60120PWPR is a monolithic DC-DC switching regulator that includes all the necessary functions required for switching between the input and output power sources. It integrates two high-voltage switches, a high-efficiency current-mode pulse-width modulator (PWM), and all of the associated circuitry required for typical applications. The regulator is designed to operate at a constant frequency over a wide range of input and output voltages and load currents.

The high-voltage switches are designed to support high switching frequencies and low input/output voltage transients. The current-mode PWM controller with programmable frequency, compatibility with low ESR ceramic output capacitors, and adaptive over temperature protection ensure reliable performance over a wide range of conditions. The TPS60120PWPR includes internal high side and low side MOSFETs and a resistor divider to set the output voltage. External control and monitoring signals are provided.

Features

• Wide input voltage range: 6V to 65 V
• Output voltage range: 0.5V to 20V
• Integrated switching FETs: 2 high-voltage p-channel and n-channel
• Current-mode PWM with programmable frequency
• High-efficiency operation
• Under-voltage lockout with hysteresis
• Compact 28-pin, 5mm x 5mm QFN package

Applications

• Battery-powered equipment
• Portable electronics
• Notebook computer power supplies
• Cellular phones
• MP3 players
• PDAs
• Bluetooth accessories
• Wireless LANs
• Imaging devices
• Wireless base stations

Working Principle

The TPS60120PWPR is a monolithic DC-DC switching regulator that integrates two high-voltage switches, a high-efficiency current-mode pulse-width modulator (PWM), and all the associated circuitry required for typical applications. The regulator is designed to provide a regulated output voltage from an unregulated input voltage stored in a battery or dc-dc converter. The two integrated high-voltage switches can step up or step down the input voltage, or a combination of both, to provide the desired output voltage.

The current-mode PWM controller includes a programmable frequency and adaptive over temperature protection. The switching MOSFETs are configured to reduce input/output voltage transients, while minimizing the switch-on losses associated with switching from high to low output voltages. The power loss is further reduced with low on-resistances and optimized layout.

The TPS60120PWPR also includes a resistive divider for setting the output voltage. It features a programmable under-voltage lockout (UVLO) with hysteresis, which prevents the regulator from starting up if the input voltage is too low. Additional features such as thermal shutdown and reverse battery protection ensure reliable operation in challenging power environments.

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