TPS63012YFFR Integrated Circuits (ICs)

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TPS63012YFFR Application Field and Working Principle

The TPS63012YFFR (from Texas Instruments) is an integrated step-down converter, which is especially designed for battery powered systems providing up to 1.5A of continuous output current. It is a DC-DC switching regulator belonging to the Power Management ICs (PMICs) category and falls under the Voltage Regulators and DC to DC Switching Regulators classification. This regulator is optimal for 1-cell Lithium-Ion (Li-Ion) battery applications up to 5.5V and supplies a regulated 5V output.

Features

• Integrated low RDS(on) power MOSFET’s
• Modulated pulse frequency control
• Reverse battery protection
• Accurate aimed efficiency
• Full thermal shutdown protection
• Internal soft-start
• Programmable frequency and peak current limit
• Low quiescent current enables high efficiency
• High-speed response to changes in load conditions
• High light load efficiency

Application Field

The TPS63012YFFR DC-DC switching regulator is ideal for applications including handheld systems, point-of-load (POL) applications, battery powered systems, mobile Internet devices, PCMCIA cards, digital cameras, and other portable devices. Its low-profile QFN package helps save the overall profile of the portable device in which it is installed.

Working Principle

The TPS63012YFFR DC-DC switching regulator basically works on the PFM (Pulse Frequency Modulation) switching principle in which instead of varying the pulse width (as used in other topologies like PWM), the circuit modulates the output current to regulate the voltage. Here the output voltage is sensed by the device and the pulse frequency is modulated via an internal signal. This modulated signal is given to the PWM comparator and the output signal is inverted and then applied to the Pulse-width signal drive circuit to drive the power MOSFET. When the signal starts to increase, the PWM comparator output decreases accordingly and the duty cycle of the power MOSFET decreases too, thus reducing the output power.

The TPS63012YFFR device uses an internal feedback loop from the output voltage to adjust the switching frequency. At the same time, the current limit threshold is set directly from the input supply so that the device can sense the current variation from the input and maintain a steady-state current limit level. The device also includes an internal soft-start and two selectable frequencies for slow or fast transient response.

Conclusion

The TPS63012YFFR DC-DC switching regulator converter belongs to the voltage regulators and DC-DC switching regulators classification of Power Management ICs (PMICs). It is designed for 1-cell lithium-ion (Li-Ion) battery applications with output current up to 1.5A and is suited for a wide range of portable and handheld devices. This device works on the PFM (Pulse Frequency Modulation), in which it modulates the output current to regulate the voltage and uses an internal feedback loop to adjust the switching frequency according to the output voltage. The device also offers various features such as reverse battery protection, accurate aimed efficiency, full thermal shutdown protection, and low quiescent current that enables high-efficiency.

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