PT9222

The PT9222 integrates a PWM controller and two low-dropout linear regulators into a single chip. The PWM controller PT9222 provides the CPU core voltage controlled by a 5-bit DAC and the linear section regulates power for GTL bus, clock driver or other circuits on motherboards. The PWM controller PT9222 provides an adjustable Intel-compatible 1.3V~3.5V output voltage. The synchronous N-MOSFET driver with 200 KHz switching frequency optimizes the efficiency, device size, and cost built-in overvoltage and current-limiting protection prevent the CPU from damage. Power-good signal is sent when the core voltage is within ±10% of the setting point.The linear section is a low dropout regulator which drives low cost NPN transistors to supply the 1.5V and 2.5V regulated output power.

Features of the PT9222 are:(1)Provides 3 Regulated Voltages;(2)N-MOSFET Driver for High Efficiency Switching Section;(3)Power-good, Over-voltage, and Currentlimiting Protection for Switching Section;(4)1.5V and 2.5V Fixed Output Voltage for Linear Section;(5)Linear Section Uses Low Cost NPN Transistor as Power Device;(6)TTL-compatible 5-bit DAC Core Output Voltage.

The absolute maximum ratings of the PT9222 can be summarized as:(1)VCC to GND:-0.3 to +5.5V;(2)PGND to GND:± 0.3V;(3)BSTH and BSTL to GND:-0.3 to +14V;(4)Ambient Temperature Range:0 to +70°C;(5)Junction Temperature Range:0 to +125°C;(6)Storage Temperature Range:-65 to +150°C;(7)Lead Temperature (Soldering, 10 sec.):300°C;(8)Package Thermal Resistance SOP-24, JA:75°C/W.