LM5175QPWPRQ1 PMIC – Voltage Regulators – DC DC Switching Controllers

The LM5175QPWPRQ1 is a high-efficiency, synchronous buck controller developed by Texas Instruments. It has a 1.5A continuous output current capability, making it suitable for regulat- ing up to 1A power supply current in DC/DC converters that use a wide input voltage range, such as PoL applications. It is offered in a low-profile 5-pin WQFN package and iETS51- compliant thermal performance.

LM5175QPWPRQ1 Application Field

The LM5175QPWPRQ1 is ideal for a variety of PoL applications, including industrial, telecom, and personal electronic applications. It can be used in a variety of DC/DC converter applications, including those for personal electronic devices and embedded applications. Other applications include induction cooktop controllers, fitness equipment, and other consumer and industrial applications that require high-efficiency, low-component-count switching regulator DC-to-DC converters.

LM5175QPWPRQ1 Working Principle

At the heart of the LM5175QPWPRQ1 is a synchronous buck regulator with a traditional voltage-mode architecture. It has two power transistors on a single die, one for high-side and one for low-side switching. The LM5175QPWPRQ1 is designed for very high-efficiency regulation of the output voltage. It is a synchronous buck controller, which operates at a fixed frequency of 500KHz. The output voltage can be programmed within a range of 0.6V to 6V.

In the buck configuration, the high-side transistor is a PMOS (p-type, metal-oxide-semiconductor) device and the low-side is an NMOS (n-type, metal-oxide-semiconductor) device. The controller employs a high current MOSFET driver with 1 A peak current to drive the external power transistors. It also has a low on-resistance MOSFET (LOM) for the low-side power switch to facilitate switching at higher duty cycles. The LM5175QPWPRQ1 also contains a current-mode PWM (pulse-width modulation) controller with a voltage-mode, current-mode-signal amplifier. It monitors the desired output voltage using an internal 0.6 V reference voltage and adjusts the duty cycle of the driver accordingly. The output voltage can be programmed in two ways: either by adjusting the feedback voltage on the feedback pin, or by programming a particular output voltage from an external supply.

The LM5175QPWPRQ1 includes a wide range of features such as enable and selectable active-high or active-low logic level operation, selectable soft-start or full protection, hiccup protection, over-voltage protection and under-voltage protection. It also features output voltage tracking, output voltage balance, and asynchronous operation. It is also capable of controlling multiple outputs and has an integrated reset signal.

The LM5175QPWPRQ1 is powered by a 5V voltage source. It comes with several built-in protection features such as under-voltage lockout (UVLO) and over-current limiting (OCL). It also contains a temperature-dependent protection mechanism to measure the temperature of the part, and disable the output voltage in the event of excessive temperatures. The LM5175QPWPRQ1 is available in a 5-pin WQFN package and can be used in a wide range of applications.

Conclusion

In conclusion, the LM5175QPWPRQ1 PMIC is a highly efficient PMIC with excellent thermal performance that is ideal for a variety of PoL applications, including industrial, telecom, and personal electronic applications. It offers the advantages of a synchronous buck converter such as high efficiency, wide input voltage range, low component count, output voltage tracking, and current-mode control. Its wide range of features make it an excellent choice for high-efficiency DC/DC converter applications.