LTC5505-1 - RF Power Detector with Buffered Output and >40dB Dynamic Range
The LTC®5505-X is an RF power detector for RF applications operating in the 300MHz to 3.5GHz range. A temperature compensated Schottky diode peak detector and buffer amplifier are combined in a small 5-pin ThinSOT package. The supply voltage range is optimized for operation from a single lithium-ion cell or 3xNiMH.
http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1011,C1074,P2084,D1045
High Input Voltage SMPS Start-up / Linear Regulator
The Supertex LR645 is a high input voltage, low output current linear regulator. It has a 3-terminal fixed output voltage version available in TO-92, TO-220 and SOT-89 packages, as well as an adjustable voltage version available in an 8-lead SOIC package. The 3-terminal version functions like any other low voltage 3-terminal regulator except it allows the use of much higher input voltages. When used in a SMPS startup circuit, it eliminates the need for large power resistors.
http://www.supertex.com/pdf/datasheets/LR645.pdf
