The TC78S122FTG(Z,EL) is a high-efficiency, synchronous step-down DC-DC converter manufactured by Toshiba Semiconductor and Storage. It is designed for applications requiring efficient power conversion from a higher voltage to a lower voltage, commonly used in portable devices and power management systems. The device integrates a control MOSFET and a synchronous rectifier MOSFET for high efficiency and reduced external component count.

Applications:

• Portable devices (e.g., smartphones, tablets)
• Power management systems
• Point-of-load regulators
• Battery-powered equipment
• Industrial control systems

Features:

• High efficiency: Up to 95%
• Input voltage range: 4.5 V to 18 V
• Output voltage: Adjustable from 0.8 V to Vin
• Output current: Up to 2 A
• Integrated synchronous rectifier
• Overcurrent protection (OCP)
• Overvoltage protection (OVP)
• Thermal shutdown (TSD)
• Soft-start function
• Small outline package: HTSSOP16

Benefits:

• Extended battery life in portable devices due to high efficiency.
• Versatile application with a wide input and adjustable output voltage range.
• Reduced component count and board space due to integrated MOSFETs.
• Enhanced system reliability with comprehensive protection features (OCP, OVP, TSD).
• Minimized inrush current during startup due to the soft-start function.
• Compact design enabled by the HTSSOP16 package.

Additional Details:

The TC78S122FTG(Z,EL) employs a constant frequency PWM control scheme to achieve high efficiency over a wide load range. It features an enable pin for power sequencing and shutdown control. The device offers cycle-by-cycle overcurrent protection, which limits the output current during overload conditions. The overvoltage protection prevents the output voltage from exceeding a safe level. The thermal shutdown function disables the converter when the junction temperature exceeds a predetermined threshold. This device is available in a HTSSOP16 package, which provides excellent thermal performance. The switching frequency is typically 500kHz.