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Blog blog, news from technology , fresh release technologies and components , interesting devices and many useful electronic circuits and schematics diagrams .

SE95 temperature sensor

NXP ( Philips Semiconductor ) introduces the SE95 temperature sensor . The SE95 is a digital temperature sensor which use a  Sigma Delta analog-to-digital conversion technique.

The device is also a thermal detector providing an overtemperature detection output.

The SE95 temperature sensor  provide also a over temperature detection .

The SE95  use some registers ( which can be accessed via I2C interface ) like Configuration register (used to store the configuration like sampling rate ) , Temperature register (to store readings of temperatures ) , Set –point register to store the overtemperature limits and identification register to store the manufacturer numbers .

The SE95 can be configured for different operation conditions :

-normal mode which monitor periodically the ambient temperature

-shutdown mode which minimize power consumption

The SE95 temperature sensor  offer high resolution of the temperature ( with five decimals ex. 0.03125 )  . For normal operation and compatibility with the LM75A  only the 11 MSBs are read, with a resolution

of 0.123 °C to provide the accuracies specified. To be compatible with the LM75 read only the 9 MSBs.

Main features of the SE95 temperature sensor are : Pin compatibility with LM75/LM75A , I2C-bus interface to 400 kHz with up to 8 devices on the same bus , Supply voltage from 2.8 V to 5.5 V , Temperature range from -55 °C to +125 °C , 13-bit ADC that offers a temperature resolution of 0.03125 °C , Temperature accuracy of ± 1 °C from -25 °C to +100 °C , Programmable temperature threshold and hysteresis set points , Supply current of 7.0 mA in shutdown mode for power conservation , Stand-alone operation as thermostat at power-up .


LT3972 monolithic buck switching regulator

Linear Technology introduces another monolithic buck switching regulator  LT3972 with  an adjustable frequency from 200kHz to 2.4MHz .

LT3972 operates over an input voltage range from 3.6 to 33 volts  and offer a maximum output current of 3.5A .

Like LT3680 and other buck switching regulators the LT3972 offers output foltage from 0.79V  to 30 V , thermal protection , soft start capability and many other features .

The design circuit of the LT3972 circuit is almost the same like LT3980 .

To design the application circuit you need to calculate few components values .

The LT3972 like other monolithic buck regulators manufactured by Linear Technology are ideal for low cost applications .

LT3972 monolithic buck switching regulator

LT3695 switching regulator

The LT3695 is an adjustable frequency (250kHz to 2.2MHz) monolithic buck switching regulator designed in a small package . LT3695 buck switching regulator operates over a wide input voltage range from 3.6V to 36V and can safely sustain transient voltages up to 60V.

A SYNC pin allows the user to synchronize the part to an external clock, and to choose between low ripple Burst Mode operation and standard PWM operation.

Output voltage range that can obtained using the LT3695 switching regulator is form 0.8V to 20V with a maximum output current of 1 Amp .

The output voltage of the LT3695 regulator  is programmed with a resistor divider between the output and the FB pin. The resistor value can be calculate using these formula :

LT3695-regulator resistor

If you want to design a circuit based on the LT3695 buck switching regulator read the datasheet of this regulator where you can find other formulas to modify and found the minimum and maximum input voltage , the highest acceptable switching frequency , the minimum and maximum duty cycles that can be achieved and other useful design tips .


LT3695 switching regulator LT3695-regulator-efficiency



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