Texas Instruments LM22670 | Demoboard LM22670EVAL

Description

The LM22670 evaluation board is designed to demonstrate the capabilities of the LM22670 switching regulator. The LM22670 evaluation board is configured to provide an output voltage of 3.3V up to 3A load current with an input voltage range of 4.5V to 42V. Due to the low RDS(ON) of the integrated N-channel MOSFET and maximum duty -cycle limitations, the minimum input voltage of 4.5V will only provide a 3.3V output voltage for load currents up to 500 mA. For load currents higher than 500 mA, an input voltage of 5.5V or higher is required. The typical operating frequency is 500 kHz. The evaluation board is designed to operate at ambient temperatures up to 50°C.At low input voltages between 4.5V and 6V, a minimum load of approximately 5 mA may be required to reach a regulated 3.3V output voltage. To aid in the design and evaluation of DC/DC buck converter solutions based on the LM22670 switching regulator, the evaluation board can be re-configured for different output voltages.

Features

• Wide Input Voltage Range: 4.5 V to 42 V
• Internally Compensated Voltage Mode Control
• Stable With Low ESR Ceramic Capacitors
• 120-mΩ N-channel MOSFET PFM Package
• 100-mΩ N-channel MOSFET SO PowerPAD™-8 Package
• Output Voltage Options:
• ADJ (Outputs as Low as 1.285 V)
• 5.0 (Output Fixed to 5 V)
• ±1.5% Feedback Reference Accuracy
• 500-kHz Default Switching Frequency
• Adjustable Switching Frequency and Synchronization and good transient response
• –40°C to 125°C Operating Junction Temperature
• Precision Enable Pin
• Integrated Boot-Strap Diode
• Integrated Soft-Start
• Fully WEBENCH® Enabled
• LM22670-Q1 is an Automotive-Grade Product LM22670 device also has built-in thermal shutdown,that is AEC-Q100 Grade 1 Qualified (–40°C to and current limiting to protect against accidental+125°C Operating Junction Temperature)

Typical applications

• Telecom and Datacom Systems
• Industrial control

More information

• Datasheet
• IC product information