TPS62311YZDR Integrated Circuits (ICs)

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TPS62311YZDR application field and working principle

TPS62311YZDR is a single-chip step-down DC/DC converter from Texas Instruments that enables low-noise and high-efficiency power conversion. It\'s a member of the TPS623xx family, designed to meet low-power applications and highly integrated. This chip helps designers to quickly create a high-performance power supply solution with the complete regulation loop and the state-of-the-art control algorithm.

Features of TPS62311YZDR

• Input voltage range: 2.7V to 5.5V
• Output voltage adjustable range: 0.6V to 3.3V
• Internal or external compensation
• Integrated power MOSFETs
• High-accuracy monitoring of input voltage and output current
• No-load quiescent current consumption: 2μA
• Low shutdown mode current consumption: 0.7μA typ. @ VIN = 3V
• Programmable over-current protection, soft-start and tracking.
• Operating temperature range: -40°C to +85°C

Application field of TPS62311YZDR

TPS62311YZDR is particularly suitable for battery-operated systems, portable and hand-held devices and insulated power supply, because of its 2μA quiescent current consumption and high performance. It is suitable for use in notebook computers, sensor interfaces, power management ICs, wireless LANs, wireless communications for mobile phones, IoT devices and set-top boxes.

Working principle of TPS62311YZDR

The TPS62311YZDR integrates a high-efficiency step-down DC/DC converter and a wide-input voltage range of 2.7V to 5.5V, and enables a low-output voltage as low as 0.6V. It features a unique control loop and integrated inductor which enables a very fast conversion.

The chip includes two power MOSFETs, one N-Channel and one P-Channel. The internal main switch is a high-side N-Channel MOSFET, and the synchronous rectifier is a low-side P-Channel MOSFET. The control logic inside the chip enables smooth transitions between the two switches to ensure there are no differences in output voltages.

The output voltage is determined by an external reference voltage, VREF, and the setting of five external resistors, RP, RN and RD. The internal voltage reference generates the reference voltage, VREF, and it is adjusted to an accuracy of ±1%. This allows for tight control of the output voltage, even when the input voltage fluctuates.

The chip is capable of switching at high Switching frequencies, of up to 2MHz, and can provide a peak current of up to 3A. The switching frequency is set by an external resistor and by an internal clock. This allows for efficient management of power in the system, and avoids EM interference.

The TPS62311YZDR also includes a wide range of protection features such as over-current protection, soft start and tracking. The device also has a low-power shutdown mode which reduces the quiescent current to 0.7μA at VIN = 3V.

Conclusion

The TPS62311YZDR is a highly integrated chip from Texas Instruments that enables low-noise and high-efficiency power conversion. This chip is suitable for use in battery-powered systems, portable and hand-held devices and insulated power supply, due to its low quiescent current consumption and high performance. The chip features integrated power MOSFETs, a high-efficiency step-down DC/DC converter and a wide-input voltage range of 2.7V to 5.5V. It also includes a wide range of protection features, such as over-current protection, soft start and tracking.

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