5V/3.3V/3V/Adjustable, High-Efficiency, Low IQ, Step-Down DC-DC Converters

General Description The MAX639/MAX640/MAX653 step-down switching regulators provide high efficiency over a wide range of load currents, delivering up to 225mA. A current-limiting pulse-frequency-modulated (PFM) control scheme gives the devices the benefits of pulse-width-modulated (PWM) converter

5V/3.3V/3V/Adjustable, High-Efficiency, Low IQ, Step-Down DC-DC Conver

文件：778.12 Kbytes Page：13 Pages

Silicon Variable Capacitance Diode (For tuning of extended frequency band in VHF TV / VTR tuners)

Silicon Variable Capacitance Diode • For tuning of extended frequency band in VHF TV / VTR tuners

High Current Transistors

High Current Transistors NPN Silicon

NPN medium power transistors

DESCRIPTION NPN transistor in a TO-92; SOT54 plastic package. PNP complements: BC636, BC638 and BC640. FEATURES • High current (max. 1 A) • Low voltage (max. 80 V). APPLICATIONS • Driver stages of audio/video amplifiers.

Low voltage mixer FM IF system with filter amplifier and data switch

DESCRIPTION The SA639 is a low-voltage high performance monolithic FM IF system with high-speed RSSI incorporating a mixer/oscillator, two wideband limiting intermediate frequency amplifiers, quadrature detector, logarithmic received signal strength indicator (RSSI), fast RSSI op amps, voltage re

Low voltage mixer FM IF system with filter amplifier and data switch

DESCRIPTION The SA639 is a low-voltage high performance monolithic FM IF system with high-speed RSSI incorporating a mixer/oscillator, two wideband limiting intermediate frequency amplifiers, quadrature detector, logarithmic received signal strength indicator (RSSI), fast RSSI op amps, voltage re