JW4005H is a monolithic linear and switching voltage regulator, specially designed to provide efficient, low noise power to Satellite receiver’s RF LNB (Low Noise Block) converter via coaxial cable. The JW4005H integrates a current mode boost converter followed by a tracking linear regulator. A high switching frequency is chosen to minimize the size of passive filtering components, further assisting in cost reduction. The tracking linear regulator protects the output against overload or short circuit. The JW4005H provides a number of features described in DiSEqC. For DiSEqC communications, the 22 KHz tone signal can be generated from external clock, all the way down to no-load. JW4005H is available in TSOT23-6 packages.

FEATURES


DiSEqC 1.x Compatibility


Up to 0.6A Continuous Output Current


4.5V to 14V Input Voltage


Tracking Switch-Mode Power Converter for

Lowest Power Dissipation, High Efficiency


Boost Converter with Internal Switch


Low Noise Linear Regulator Output


External Input 22KHz Tone


Boost Output Over-Voltage Protection LNB

Short Circuit Protection with Hiccup Mode


Over Temperature Protection


Available in TSOT23-6

APPLICATIONS


LNB Power Supply and Control for Satellite

Set-Top Boxes