RT9232

The RT9232 is designed as one kind of 4-bit programmable synchronous PWM buck converter controller that can be used in (1)Pentium II microprocessors power supplies;(2)flexible motherboards power supplies;(3)low-voltage distributed power supplies;(4)programmable step-down power supplies. This device drivers two N-MOSFETs at 200 KHz frequency and provides an optimal solution for size, efficiency, and cost in any application circuits. The controller also offers integrated functions including output enable, internal digital-count soft start, over-voltage, and current-limiting protection in one chip.

Features of the RT9232 are:(1)3 regulated voltage;(2)N-MOSFET driver for high efficiency switching section;(3)power-good, over-voltage and current-limiting protection for switching section;(4)1.5 V and 2.5 V fixed output voltages for linear section;(5)1.265 V reference voltage output;(6)capable of driving low cost NPN transistor as power device;(7)TTL-compatible 5-bit DAC core output voltage.

The absolute maximum ratings of the RT9232 can be summarized as:(1)Vcc to GND: -0.3 V to +5.5 V;(2)PGND to GND: +/-0.3 V;(3)BST to GND: -0.3 V to +14 V;(4)ambient temperature range: 0 to +70 ;(5)junction temperature range: 0 to +125 ;(6)storage temperature range: -65 to +150 ;(7)lead temperature solding 10 seconds: 300 ;(8)thermal impedance junction to ambient: 80 /W;(9)thermal impedance junction to case: 25 /W. If you want to know more information such as the electrical characteristics about the RT9232, please download the datasheet in www.seekic.com or www.chinaicmart.com .