LTC7801HFE Integrated Circuit Chip 150V High-Voltage Low Quiescent Current Synchronous Step-Down DC DC Controller

The LTC7801HFE is a 150V high-voltage, low-quiescent current synchronous step-down controller in a 24-TSSOP package, designed for high-voltage power battery applications in humanoid robots. It is primarily suited for multi-channel power conversion for joint actuators, main controllers and sensors.

• High-voltage, wide-input-voltage compatibility with robot batteries (4-140V input range, 150V rating)
• Directly drives 48V/96V high-voltage lithium-ion batteries with surge protection
• Output voltage adjustable from 0.8-60V for flexible power supply
• Supports up to 100% duty cycle for stable operation during low-voltage battery phases
• Ultra-low quiescent current (40 μA light load, 10 μA idle) with Burst Mode for low ripple
• Excellent transient response for dynamic loads and frequent joint start-stop cycles
• Programmable switching frequency (50 kHz-900 kHz) with synchronous phase-locked loop
• Integrated bootstrap diodes and built-in LDO reduce external components
• Maximum conversion efficiency of 96%
• Comprehensive protection features including power-good monitoring, OVP, soft start, and current-limit protection

This controller extends battery life significantly during standby or unloaded operation, making it ideal for humanoid robots requiring prolonged patrols and interactions. The compact TSSOP package facilitates high-density PCB routing within confined robot chassis spaces.

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