VB408B - STMicroelectronics

VB408B HIGH VOLTAGE LINEAR REGULATOR POWER I.C.

The VB408, VB408B, VB408FI are fully protected positive adjustable voltage regulators made using a proprietary High Voltage VIPower™ technology. The device can be connected to a D.C. source (up to 400V) or in off-line application directly to the rectified main (110V/ 230V). It is particularly suitable to be used in the manufacture of DC/DC converters, AC/DC .

Features

m 1.25V to VIN-30V providing an internally limited output current; it has built in short circuit and thermal shutdown protections. The device does not provide galvanic insulation from main. BLOCK DIAGRAM V IN Power Stage BIAS CIRCUIT CURRENT SENSE V OUT Current Limitation + _ Thermal RE F 3 REF 2 + _ Protection C ontrol Signal + _ RE F 1 AD J FC00410 September 1999 1/8 1 VB408 / VB408B / VB408FI ABSOLUTE MAXIMUM RATING Symbol Parameter Input to Output Voltage at 20 mA Output current Electrostatic discharge (R=1.5kΩ, C=100pF) Power dissipation at TC=25oC Junction operating temp.