Buck Pulse Width Modulator Stepdown Voltage Regulator

The UC3573 is a Buck pulse width Modulator which steps down and regulates a positive input voltage. The chip is optimized for use in a single inductor buck switching converter employing an external PMOS Switch The block diagram consists of a precision reference, an error Amplifier configured 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 present before any switching activity CAN occur, and a pulse-by-pulse current limit. Input current CAN be sensed and limited to a user determined maximum value. In addition, a sleep Comparator Interfaces to the UVLO circuit which turns the chip off when the input voltage is below the UVLO threshold. This reduces the supply current to only 50uA, making the UC3573 ideal for battery powered applications.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
UC2573DTR Texas Instruments Buck Pulse Width Modulator Stepdown Voltage Regulator 8-SOIC -40 to 85
UC2573DTRG4 Texas Instruments Buck Pulse Width Modulator Stepdown Voltage Regulator 8-SOIC -40 to 85
UC2573DG4 Texas Instruments Buck Pulse Width Modulator Stepdown Voltage Regulator 8-SOIC -40 to 85
UC2573D Texas Instruments Buck Pulse Width Modulator Stepdown Voltage Regulator 8-SOIC -40 to 85
UC2573N Texas Instruments Buck Pulse Width Modulator Stepdown Voltage Regulator 8-PDIP -40 to 85
UC2573NG4 Texas Instruments Buck Pulse Width Modulator Stepdown Voltage Regulator 8-PDIP -40 to 85
UC2573 's PackagesUC2573 's pdf datasheet
UC2573D SOIC
UC2573DG4 SOIC
UC2573DTR SOIC
UC2573DTRG4 SOIC
UC2573N PDIP
UC2573NG4 PDIP




UC2573 Pinout, Pinouts
UC2573 pinout,Pin out
This is one package pinout of UC2573,If you need more pinouts please download UC2573's pdf datasheet.

UC2573 Application circuits
UC2573 circuits
This is one application circuit of UC2573,If you need more circuits,please download UC2573's pdf datasheet.


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