TPS65170RHDR

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TPS65170RHDR Application Field and Working Principle

The TPS65170RHDR is a specialized four-output power management integrated circuit (PMIC) designed for modern lithium-ion battery-powered embedded systems. It is used in a variety of applications, including portable medical, computing and communication systems, industrial control and automation, home appliance, and multimedia. This PMIC integrates two highly efficient buck converters, one LDO, and one adjustable output voltage LDO. It also features a wide input voltage range, spread spectrum frequency clock, and 800kHz switching frequency at 4MHz fixed clock mode.

The output voltages of the TPS65170RHDR are adjustable or efficiency optimized for the application. It can operate at input voltages from 2.7V to 5.5V. The integrated output voltage range extends from 0.9V to 3.2V for the adjustable buck and from 1.8V to 3.3V for the efficiency-optimized buck. The adjustable LDO output voltage can be set from 0.9V to 5.0V, while the efficiency- optimized LDO output voltage can be set at 1.8V. The output current capability of this PMIC is up to 500mA per channel.

Working Principle

The TPS65170RHDR is based on the powerful Smart Switch architecture. The Smart Switch architecture incorporates a low-dropout (LDO) power supply with a multiple-output buck converter to offer efficient power conversion. This circuit utilizes a high-efficiency control loop to ensure that the output voltage remains regulated even when the input voltage fluctuates. The Smart Switch architecture also feature low-noise operation, making it an ideal choice for noise-sensitive applications.

The TPS65170RHDR utilizes an internal oscillator for regulating its output voltage. The oscillator frequency is adjustable and can be set to either a 4MHz Fixed Clock or Spread Spectrum mode. In the Spread Spectrum mode, the frequency is randomly spread within the fixed frequency range to minimize the noise emissions from the circuit.

The TPS65170RHDR includes a wide range of output voltage protections, including over-voltage, under-voltage, and thermal overload protection. It also includes a soft-start feature to reduce inrush currents. Additionally, the TPS65170RHDR also features a power good flag that indicates when the supply voltages are within their operating range.

Conclusion

The TPS65170RHDR is a powerful and highly efficient four-output power management integrated circuit (PMIC) that is well-suited for modern lithium-ion battery-powered embedded systems. It has a wide input voltage range and adjustable output voltage range, with a maximum output current of 500mA per channel. In addition, it is based on the powerful Smart Switch architecture, which offers low-noise operation and wide range of output voltage protections. The TPS65170RHDR is an ideal choice for applications that require high efficiency and excellent regulation with minimal noise.

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