RT9258 Datasheet | Richtek

Description The RT9258 is a two phases synchronous Buck PWM controller with integrated drivers which is optimized for high-performance graphic microprocessor and puter applications. The IC integrates a voltage mode PWM controller, two 5V MOSFET drivers with internal bootstrap diodes, as well as output current monitoring and protection functions into a WQFN-24L 4x4 package. The inductor currents are sensed by lossless DCR current sensing technique for current balance and over current protection. The RT9258 also features a reference tracking mode operation in which the feedback voltage is regulated and tracks external input reference voltage. Other features include output current indication, adjustable operating frequency, adjustable soft-start, power good, external pensation, and enable/shutdown functions. Applications z Middle to High End GPU Core Power z High End Desktop PC Memory Core Power z Low Voltage, High Current DC / DC Converter z Voltage Regulator Modules Ordering Information Package Type QW : WQFN-24L 4x4 (W-Type) Note : Lead Plating System G : Green (Halogen Free and Pb Free) Richtek products are : ` Ro HS pliant and patible with the current require- ments of IPC/JEDEC J-STD-020. ` Suitable for use in Sn Pb or Pb-free soldering processes. Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. Features z Two-Phase Power Conversion with Single 12V Power Supply z Embedded 5V Upper Gate Driver and 12V Lower Gate Driver z Internal Regulated 5V Output z Precise Core Voltage Regulation z Selectable Internal / External Reference z Differential Inductor DCR Current Sense z External Programmable Voltage Droop Control z Enable Control for External Shutdown z Adjustable Operating Frequency z Adjustable Soft Start z Power Good and Output Current Indication z Adjustable Over Current Protection z Over Voltage Protection z Under Voltage Protection z Over Temperature...