■Overview
●The AN8049SH is a three-channel PWM DC-DC converter control IC that features low-voltage operation.
●This IC can form a power supply that provides two step up outputs and one step-down or polarity inverted output with a minimal number of external components. The AN8049SH features the ability to operate from a supply voltage as low as 1.8 V, and thus can be operated from two dry-batteries.
●■Features
●•Wide operating supply voltage range: 1.8 V to 14 V
●•High-precision reference voltage circuit
● —VREFpin voltage: ±1%
● — Error amplifier: ±1.5%
●•Surface mounting package for miniaturized and thinner power supplies Package: SSOP-24D
● 0.5-mm lead pitch
● 7.8 mm ×6.8 mm ×t1.9 mm
●•Supports control over a wide output frequency range: 20 kHz to 1 MHz
●•On/off (sequence control) pins provided for each channel for easy sequence control setup
●•The negative supply error amplifier supports 0-volt input.
● Common-mode input voltage range: −0.1 V to VCC −1.4 V
● This allows the number of external components to be reduced by two resistors.
●•Fixed duty factor: 86% However, the duty can be adjusted to anywhere from 0% to 100% with an external resistor.
●•Timer latch short-circuit protection circuit (charge current: 1.1 µA typical)
●•Low input voltage malfunction prevention circuit (U.V.L.O.) (operation start voltage: 1.67 V typical)
●•Standby function (active-high control input, standby mode current: 1 µA maximum)
●•Alternate package versions also available.
● Part No.: AN8049FHN
● Package: QFN-24
● 0.5-mm lead pitch
● 5.4 mm ×4.4 mm ×t0.8 mm
●■Applications
●•Electronic equipment that requires a power supply system
