STEVAL-ISA159V1

STEVAL-ISA159V1 is an evaluation board based on L6984, a high-efficiency monolithic synchronous step-down regulator capable of delivering up to 400mA DC current. The fixed 3.3V output requires no external resistor divider. The L6984 is suited for home appliances, factory and building automation. The Low Consumption Mode (LCM) is designed for eco-friendly home appliances and automotive applications active during car parking, so it maximizes the efficiency at light load with controlled output voltage ripple. The Low Noise Mode (LNM) makes the switching frequency nearly constant over the load current range, serving low noise application specifications such as audio and sensors. The PGOOD open collector output can implement output voltage sequencing during the power-up phase. The synchronous rectification, designed for high efficiency at medium-heavy load, and the high switching frequency capability ensure a compact application size.

• 400mA DC output current
• 4.5V to 36V operating input voltage
• Synchronous rectification
• Low consumption mode or low noise mode
• 100µA IQ at light load and 13µA IQ-SHTDWN
• Adjustable fSW (250kHz - 600kHz)
• Output voltage adjustable from 0.9V
• No resistor divider required for 3.3V VOUT
• VBIAS maximize efficiency at light load, 350mA valley current limit, constant on-time control scheme
• PGOOD open collector and thermal shutdown