FAN5308MPX

The FAN5308MPX is a high-efficiency step-down DC-to-DC Converter designed for use in battery-powered applications. The FAN5308 is a high-efficiency, low-noise synchronous PWM current mode and pulse skip (power-save) mode DC-to-DC converter. It can provide up to 800mA of output current over an input range from 2.5 to 5.5V. The output voltage can be externally adjusted over a range of 0.8 to 5.5V by means of an external voltage divider. At moderate and light loads, pulse skipping modulation is used. Dynamic voltage positioning is applied and the output voltage is shifted 0.8% above nominal value for increased headroom during load transients. At higher loads, the system automatically switches over to current mode PWM control, operating at 1.3MHz. A current-mode control loop with fast transient response ensures excellent line and load regulation. To achieve high efficiency and ensure long battery life, the quiescent current is reduced to 25μA in power-save mode.

• High-efficiency and power-save mode
• 100% Duty cycle low-dropout operation
• Soft-start
• Output overvoltage protection
• Dynamic output voltage positioning
• Thermal shutdown and short-circuit protection
• Supply current drops below 1μA in shut-down mode
• 96% Efficiency, synchronous operation

Applications

Computers & Computer Peripherals, Consumer Electronics, Portable Devices, Power Management, Communications & Networking