Datasheets

The NX4108-18 is a current mode PWM buck switcher with internal compensation and fixed 1.8V output voltage, can provide up to 1A output current with FET on
board. It operates from 2.8V to 5.5V which is ideal for the application with single cell Li-Ion battery as well as other 3.3V input bus supply applications. Switching frequency is fixed 1MHz, small surface mount inductors and capacitors are allowed to use, make it good for portable applications.
NX4108-18 is available in 5-pin SOT23 package.

FEATURES:
o 2.8 to 5.5V Input V oltage
o Fixed 1.8V Output Voltage
o 5-pin SOT23 Package
o 1MHz Fixed Frequency PWM Operation
o Internally-compensated Current Mode Controller
o Peak Current Limit with HICCUP Feature and Over Temperature Protection
o Prebias Start-up Operation
o Pb-free and RoHS Compliant

APPLICATIONS:
o Li-Ion Battery Operated Portable System
o Cellular Phones
o Portable Applications
o USB Devices
 
FFEA

The LX1684 is a monolithic, voltage mode pulse-width modulator controller. It is designed to implement a flexible, low cost buck (step-down) regulator supply with a minimal of external components.

This low-profile, Dual Schottky rectifier device is military qualified up to a JANTXV level per MIL-PRF-19500/730 for high-reliability applications. Its standard polarity is common cathode and a standard use RoHS compliant version is available with the "e3" suffix.

Electret Condenser Microphone (ECM) Pre-Amplifier w/Programmable HPF
The AAP661X ECM Pre Amplifiers were designed for the recent exclusive use of Plantronics, Inc. of Santa Cruz, CA for high end audio headset microphone applications. The AAP661X is now available for general sale to the audio microphone marketplace. The performance of this Pre-Amplifier is such that it enables design of enhanced end system products, due to its various gain options, ultralow noise and other high performance features.

The AAP661X ECM Pre-Amplifier provides a number of performance advantages over prior ECM Pre-Amplifier products. Key features include ultra low input capacitance (0.35pF typical) and quiescent current (250?A typical), with ultra low equivalent input noise (1.9 to 2.5 ?V RMS, A-Weighted, with the microphone capacitor short circuited, gain version dependent). Additionally, the Pre-Amplifier sports a programmable high pass filter with operation down to 1.6V. Other key features include THD performance below 0.5% maximum,
output impedance of 25? typical, with exceptionally high tolerance to RF interference and ESD tolerance (8kV).

The AAP661X is offered with two gain options, 16dB and 19dB. Packaging is bumped chip scale SMD configuration, with a size of 930?m x 580?m and an overall thickness of 350?m (including solder bumps). Optimum for 3mm microphones, the die is RoHS compliant, with lead free solder pads of 118?m diameter. Packing styles available are 2” x 2” Waffle Pack or Tape and Reel.

Features
Selectable gain configurations - 16dB and 19dB
Ultra low input capacitance - 0.35pF typical
Ultra low equivalent input noise performance - 1.9?VRMS to 2.5?VRMS (Cmic = SC, varies with gain)
8kV ESD tolerance
High RFI tolerance, low output impedance (25?)
Excellent THD performance (<0.5%)
Ultra low quiescent current (250?A typical)
Chip-scale SMD bumped packaging (930?m x 580?m, 350?m thick)

Applications
Desktop Handsfree Headsets
Mobile Phone Audio
PC Handsfree Microphone Sets
Laptop Cartridge Microphones

This 2N2944AUB through 2N2946AUB PNP Silicon transistor device is military qualified up to a JANTXV level for high-reliability applications.  A standard commercial RoHS compliant version is also available with the "e3" suffix.

This 1N643, 1N662 and 1N663 series of JEDEC registered switching/signal diodes are metallurgically bonded and hermetically sealed.  These low capacitance diodes feature double-plug construction in a DO-35 package.  A RoHS compliant version is also available with the "e3" suffix.  They are particularly suited to applications where medium speed switching is required.  Microsemi also offers a variety of other switching/signal diodes.

This SCR (Silicon Controlled Rectifier) has superior circuit-commutated turn-off time (tq) of <50 ?s.