TPS59124RGER

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The TPS59124RGER is a synchronous rectified step-down DC-DC controller that operates from 4.5 V to 5.5 V and regulates an adjustable output voltage down to a minimum of 0.6 V. It has a fast output transient response, low quiescent current, and high efficiency. The device is designed to drive an internal P-Channel MOSFET as the main switch and an internal N-Channel MOSFET as the synchronous rectifier switch. Current mode control with pulse width modulation ensures good line and load regulation. An internal loop compensation provides excellent transient response. 

The device includes efficient programmable constant current limit and short circuit protection. Cycle-by-Cycle current limit prevents damage to the external MOSFET by limiting the peak current. An adjustable fault response time allows the user to set the soft-start duration and the over-temperature protection threshold of the device.

The TPS59124RGER is a simple and efficient DC-DC solution for portable applications that require high efficiency, such as Tablet PCs, mobile phones, and PDAs. The device has been designed for applications where low RDSon, low ESR and low ripple output voltage are required as well as fast transient response.

Features

• Input Voltage range from 4.5 V to 5.5 V with pre-biased startup capability
• Output Voltage adjustable down to 0.6 V with a 0.04 V reference
• Programmable Constant Output Current Limit
• 5 A Internal Peak Current Limit
• High Efficiency Synchronous Rectifier
• Power Good Output
• Soft-Start Control
• Temperature Shutdown
• Programmable Fault Timeout
• Low IQ

Application Field

The TPS59124RGER is ideal for applications that require a high efficiency and fast transient response, such as Tablet PCs, mobile phones, and PDAs. The device is also well suited for industrial, computer, telecom, and medical applications where current, power, and accuracy are critical.

Working Principle

The TPS59124RGER works by regulating the output voltage by varying the duty cycle of the switch at a fixed frequency. A voltage feedback loop, with an internal error amplifier, monitors the output voltage and compares it to the reference voltage. The duty cycle is adjusted based on the comparison. When the output voltage is lower than the reference voltage, the duty cycle is increased, and when it is higher than the reference voltage, the duty cycle is decreased. The feedback loop is designed to keep the output voltage constant by compensating for load and line-regulation variations.

The device also includes an internal thermal control circuit to prevent over-temperature conditions and a programmable soft start time to reduce inrush current during start-up. The output voltage can also be protected with programmable fault response time.

The specific data is subject to PDF, and the above content is for reference