LT8722AV#PBF

The LT8722 is a high-performance, high-efficiency monolithic full-bridge DC/DC converter. One side of the full bridge is driven by a PWM buck power stage, while the other side is driven by a linear power stage. The device requires only a single inductor to deliver up to ±54W of power to the load. An integrated 25-bit DAC controls the output voltage. Two additional 9-bit DACs control the positive and negative output current limits. An analog output telemetry pin monitors SPI-selectable parameters such as input voltage, output voltage, output current, or die junction temperature. The SPI interface configures and controls the converter, providing flexible settings for output voltage, output current limits, voltage limits, switching frequency, and switching behavior. The SPI interface operates at up to 10MHz, enabling fast readback and control. The device operates over a voltage range of 3.1V to 15V. Silent Switching technology minimizes EMI/EMC emissions while maintaining high efficiency at high switching frequencies. The device is available in a 3mm × 3mm LQFN package.

Applications

• Thermoelectric cooler drive for precise control
• Transmitter optical subassembly cooling
• Erbium-doped fiber amplifier temperature regulation
• Photonic integrated circuit cooling
• LiDAR mirror control
• Motor control

Key features

• 25-bit digital output voltage control
• Wide input voltage range: 3.1V to 15V
• ±4A output current
• High output power: up to 54W
• High efficiency at high frequency: 92.6% efficiency at 4A, 15V input, 3MHz switching frequency
• SPI interface allows users to: set output regulation voltage, set output current limit, check device status, enable/disable output
• Integrated 4A power switch
• Silent switcher architecture
• Analog output for diagnostics/telemetry
• Adjustable and synchronizable switching frequency: 500kHz to 3MHz
• Compact 3mm × 3mm 18-pin LQFN package