Buck Pulse Width Modulator Stepdown Voltage Regulator

The UC3573 is a Buck pulse width Modulator which steps down and regu- lates a positive input voltage. The chip is optimized for use in a single in- ductor buck switching converter employing an external PMOS Switch The block diagram consists of a precision reference, an error Amplifier config- ured for voltage mode operation, an Oscillator a PWM Comparator with latching Logic and a 0.5A peak Gate driver. The UC3573 includes an undervoltage lockout circuit to insure sufficient input supply voltage is pres- ent before any switching activity CAN occur, and a pulse-by-pulse current limit. Input current CAN be sensed and limited to a user determined maxi- mum value. In addition, a sleep Comparator Interfaces to the UVLO circuit which turns the chip off when the input voltage is below the UVLO thresh- old. This reduces the supply current to only 50A, making the UC3573 ideal for battery powered applications By Texas Instruments
UC1573 's PackagesUC1573 's pdf datasheet
UC3573




UC1573 Pinout, Pinouts
UC1573 pinout,Pin out
This is one package pinout of UC1573,If you need more pinouts please download UC1573's pdf datasheet.

UC1573 Application circuits
UC1573 circuits
This is one application circuit of UC1573,If you need more circuits,please download UC1573's pdf datasheet.


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