TPS62320YEDT Integrated Circuits (ICs)

Introduction

The TPS62320YEDT is a DC-DC synchronous step-down converter, capable of delivering up to 1 A of continuous current to a load. The TPS62320YEDT uses an adjustable, dynamic on-time control architecture, designed to extend the battery life of portable applications while accommodating light loads. The TPS62320YEDT is targeted at automotive and industrial applications and offers high efficiency, best-in-class transient response, and a low 10-μA quiescent current.

Features

• Operating input voltage range of 2.2 V to 5.5 V
• Fixed-frequency PWM mode with internal loop compensation
• Clock synchronization capability
• Low output voltage range of 0.6 V to 5.25 V
• Internal synchronous rectifier with 37 mΩ low on-resistance (R_DS(ON))
• Highly integrated solution, with internal boot and compensation capacitors
• Light load operation down to 0.1 mA
• 100% duty cycle operation
• High efficiency up to 97%
• Low switching and ripple noise
• Internal soft-start
• Over-current and over-temperature protection
• Downloadable SoftSpan™ tuneables

Application Field

The TPS62320YEDT is a simple, easy-to-use, flexible, and power saving step-down converter designed for a wide range of applications such as variable power supplies, point-of-load (PoL) regulators, battery-powered systems, cellular phones, DSL, cable modems and modems, personal digital assistants (PDAs) and other similar applications.

Working Principle

The TPS62320YEDT is a synchronous buck converter that utilizes a fixed on-time control scheme to regulate its output voltage. The device is designed to draw peak current from the input supply during the switching phase, minimizing power consumption.

The output voltage is regulated through a single control loop that senses the output voltage by way of an internal operational amplifier (OP-AMP) and the feedback loop. The integrated OPA initiates the switching process at the appropriate time by comparing the output voltage with the reference voltage, which is determined by an external resistor divider. The output voltage is also monitored through an additional comparator to ensure that the output voltage is constantly within the specified operating range. During the switching phase, an internal gate driver is used to activate and deactivate the series switch.

The TPS62320YEDT also features an internal synchronous rectifier to increase efficiency. The device features adjustable SoftSpan™ programming, allowing the user to adjust the reference voltage to achieve the desired output voltage. lastly, the device features a wide range of features designed to protect the device from damages due to abnormal operating conditions, such as over-current, over-temperature, and current-sense faults.

In summary, the TPS62320YEDT is an efficient, robust, and user-friendly step-down converter that is ideal for automotive and industrial applications.