Datasheets

LX7157 is a step-down PWM regulator IC with integrated high side P-Ch MOSFET and low side N-CH MOSFET. The 3MHz switching frequency facilates small output filter components.
The operational input voltage range of LX7157 is from 3V to 5.5V. LX7157 uses current mode operation with internal compensation allowing for fast transient response with minimum external components.
LX7157 employs a pulse SKIP method at light load to improve the light load efficiency; as a result, the battery life is extended. The internal soft-start limits the inrush current.
Cycle-by-cycle current limit protects the regulator against over-current conditions. The LX7157 operates in hiccup mode to further enhance the robustness of the converter for heavy over-load or shortcircuit fault, and it recovers automatically once the fault is cleared.
The thermal protection shuts down the regulator under an over-temperature condition.

FEATURES:
o 3A Step-down Regulator
o Operational Input Supply Voltage Range: 3V-5.5V
o Integrated PMOS and NMOS
o Internal Compensation
o Internal Slope Compensation
o Load Current from zero to 3A
o 3MHz Switching Frequency
o SKIP pulse to improve light load efficiency
o Input UVLO and OV Protection
o Enable
o Power Good
o Internal Soft-start
o Cycle-by-Cycle Over Current Protection
o Hiccup Mode Operation Under OCP
o RoHS Compliant for Pb Free


APPLICATIONS:
o Set-Top Box
o LCD TV’s
o Notebook/Netbook
o Server and Workstations
o Routers
o Video Cards
o PC Peripherals
o PoE Powered Devices  
 

The NX4108-33 is a current mode PWM buck switcher with internal compensation and fixed 3.3V output voltage, can provide up to 1A output current with FET on
board. Switching frequency is fixed 1MHz, small surface mount inductors and capacitors are allowed to use, make it good for portable applications.
NX4108-33 is available in 5-pin SOT23 package.

FEATURES:
o 5V Input Voltage
o Fixed 3.3V 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 Pre-bias 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 
FEATURES:F

The NX4108-15 is a current mode PWM buck switcher with internal compensation and fixed 1.5V 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.
NX4108-15 is available in 5-pin SOT23 package.

FEATURES
o 2.8 to 5.5V Input V oltage
o Fixed 1.5V Output Voltage
o 5-pin SOT23 Package
o1MHz 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

APPLICATION
o Li-Ion Battery Operated Portable System
o Cellular Phones
o Portable Applications
o USB Devices 

The LX7157B is a step-down PWM regulator IC with integrated high side P-Ch MOSFETand low side N-CH MOSFET. The 2.2MHz switching frequency facilitates small output filter components. The operational input voltage range of the LX7157B is from 3V to 5.5V.The LX7157B uses current mode operation with internal compensation allowing for fast transient response with minimum external components. The LX7157B employs a pulse SKIP method at light load to improve the light load efficiency; as a result, the battery life is extended. The internal soft-start limits the  inrush current. Cycle-by-cycle current limit protects the regulator against over-current conditions. The LX7157B operates in hiccup mode to further enhance the robustness of the converter for heavy over-load or shortcircuit fault, and it recovers automatically once the fault is cleared. The thermal protection shuts down the regulator under an over-temperature condition.

FEATURES:
o 3A Step-down Regulator
o Operational Input Supply Voltage Range: 3V to 5.5V
o Integrated PMOS and NMOS
o Internal Compensation
o Internal Slope Compensation
o Load Current from zero to 3A
o 2.2MHz Switching Frequency
o SKIP pulse to improve light load efficiency
o Input UVLO and OV Protection
o Enable
o Power Good
o Internal Soft-start
o Cycle-by-Cycle Over Current Protection
o Hiccup Mode Operation Under OCP

APPLICATIONS:
o Set-Top Box
o LCD TV’s
o Notebook/Netbook
o Server and Workstations
o Routers
o Video Cards
o PC Peripherals
o PoE Powered Devices 

 

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.