BL8091

BL8091 18V (30V spike) 2A Synchronous PFM/PWM Buck Converter DESCRIPTION The BL8091 is a high efficiency current-mode synchronous, 18V/2A buck converter. Its input voltage ranges from 4.5V to 18V and it provides an adjustable regulated output voltage from 0.923V to 15V while delivering up to 2A of output current. The internal synchronous switches increase efficiency and eliminate the need for an external Schottky diode. The switching frequency is set to 340KHz. And the BL8091 will automatically switch between PFM and PWM mode based on the load current, thus to enhance the converter efficiency at light load. BL8091 consists of many protection block such as UVLO, input voltage over voltage protection to stand much higher input voltage spike, thermal protection and output short circuit protection. The BL8091 is available in the SOP8 and ESOP8 (with exposed pad for heat dissipation) package FEATURES  Adjustable Output Voltage, Vfb=0.923V  Maximum output current is 2A  Range of operation input voltage: Max 18V  Withstand input voltage spike >30V  Standby current: 1mA (typ.)  Operating current at zero load: 1.2mA (typ.)  Line regulation: 0.1%/V (typ.)  Load regulation: 10mV (typ.)  High efficiency, up to 95%  Environment Temperature: -20C~85C APPLICATIONS  Set-top-box  Consumer Electronic Device for automobile  LCD Monitor and LCD TV  Portable DVD  ADSL Modem, WLAN router  Other 12V or double cell Li-ion battery powered device TYPICAL APPLICATION 10uH VIN 10u...