Fairchild Announces FAN5232 PWM Buck Controller
Fairchild Semiconductor International (San Jose, CA) announced the FAN5232 adjustable PWM buck controller for LCD PCs, which allows designers of PCs to replace silver box style, multiple-voltage power supplies with a low parts count solution running from a standard brick ac wall adapter or onboard battery pack.
The FAN5232 features both a 12V adjustable output PWM buck controller for high-current devices and regulated, always-on 3.3V and 5V regulator outputs capable of 50mA for system microcontroller standby power. The synchronous PWM architecture utilized in the FAN5232 accepts input voltages ranging from 5.6V to 24V and is stable over a wide range of input and output conditions. This allows it to operate with a wide variety of ac adapters or multiple-cell battery packs, providing conversion efficiency of up to 96 percent in typical applications.
Other features include power-good indication, an independent shutdown for ACPI interfaces, output-enable/soft-start, under-voltage lockout, output over-voltage protection, and precision adjustable current limiting that utilizes MOSFET RDS(on) current sensing.
The FAN5232 is available in a 14-pin TSSOP package. An evaluation board is available. Pricing is $3.85 each in 1,000-piece quantities. Samples are available now with production quantities in seven to eight weeks ARO.
