DESCRIPTION

The SC1534 is designed to maintain a glitch-free 3.3V output when at least one of two inputs, 5V (VIN) and 3.3V (VAUX), is present.

Whenever VIN exceeds a predetermined threshold value, the internal 3.3V linear regulator is enabled, and DR is pulled high.

FEATURES

• Glitch-free transition between input sources

• Internal logic selects input source

• Gate drive for external PMOS bypass switch

• 5V detector with hysteresis

• 1 regulated output voltage accuracy

• 400mA load current capability

• SO-8 and TO-263 packages

APPLICATIONS

• Desktop Computers

• Network Interface Cards (NICs)

• PCMCIA/PCI Interface Cards

• CardbusTM Technology

• Power supplies with multiple input sources