DESCRIPTION

· The AN8049FHN is a three-channel PWM DC-DC converter control IC designed for low-voltage operation.
· It can create a power supply with two step-up outputs and one step-down or polarity inverted output using minimal external components.
· Operates with a minimal supply voltage of 1.8 V, suitable for use with 2 dry-batteries.

FEATURES

· Wide operating supply voltage range from 1.8 V to 14 V.
· High-precision reference voltage circuit with V REF pin voltage accuracy of ±1% and error amplifier accuracy of ±1.5%.
· Ultrathin surface mounting package for compact and thinner power supplies.
· Supports control over a wide output frequency range from 20 kHz to 1 MHz.
· On/off pins for each channel facilitate easy sequence control setup.
· Negative supply error amplifier supports 0-volt input with a common-mode input voltage range from −0.1 V to V CC −1.4 V, reducing external components by two resistors.
· Fixed duty factor of 86%, adjustable from 0% to 100% with an external resistor.
· Includes timer latch short-circuit protection and low input voltage malfunction prevention circuits.
· Standby function with active-high control input and standby mode current of 1 µA maximum.

APPLICATIONS

· Suitable for electronic equipment requiring a power supply system.
· Available in QFN024-P-0405A lead-free package.