GBI1630ASMAR

GBI1630A is a 60V, 3A step-down converter with an integrated 150mΩ high-side MOSFET. The device features a wide input range of 4.5V to 60V, operates in peak current mode, and supports a wide adjustable switching frequency range of 200kHz to 2.5MHz set via external resistor. The device draws 100uA quiescent current in sleep mode and 1uA shutdown current, making it suitable for battery-powered systems. Protection features include cycle-by-cycle current limiting, thermal shutdown, output overvoltage protection, and input undervoltage protection. It is available in an 8-pin eSOP-8L package. The GBI1630A employs fixed-frequency peak current mode control. The internal clock initiates turn-on of the integrated high-side power MOSFET each cycle, causing the inductor current to ramp up linearly. When the current through the high-side MOSFET reaches the threshold level set by the internal error amplifier's internal compensation voltage, the high-side MOSFET turns off. When the high-side MOSFET turns off, the inductor current freewheels through the external diode until the next clock cycle begins. The GBI1630A operates in pulse-skip mode (PSM) at light load currents to improve efficiency. A decrease in load current causes the feedback voltage to rise, which pulls the compensation voltage down. When the compensation voltage falls below the lower clamp threshold, PSM is triggered. During the skip interval, discharge of the output capacitor causes the output voltage to drop, attenuating the FB voltage.

Applications

• 12V, 24V, 48V industrial power systems
• Industrial automation and motor control
• Vehicle accessories

Key features

• Wide input range: 4.5V - 60V
• Up to 3A continuous output current
• 0.8V ± 1% feedback reference voltage
• Integrated 150mΩ high-side power MOSFET
• Adjustable frequency: 200kHz to 2.5MHz
• Pulse Skip Mode (PSM) at light load
• 100uA quiescent current in sleep mode
• Programmable soft-start time
• Hiccup protection for output short circuit
• eSOP-8L package