RT9259AGS

Product Summary

The RT9259AGS is a dual-channel DC/DC controller specifically designed to deliver high quality power where 12V power source is available. This part consists of a synchronous buck controller and an LDO controller. The RT9259AGS integrates MOSFET drivers that support 12V+12V bootstrapped voltage for high efficiency power conversion. The bootstrap diode is builtin to simplify the circuit design and minimize external part count. The LDO controller drives an external N-MOSFET for lower power requirement. The applications of the RT9259AGS include Graphic Card GPU, Memory Core Power, Graphic Card Interface Power, Motherboard, Desktop and Servers Chipset and Memory Core Power, IA Equipments, Telecomm Equipments, High Power DC-DC Regulators.

Parametrics

RT9259AGS absolute maximum ratings: (1)Supply Voltage, VCC: 15V; (2)PHASE to GND DC: -5V to 15V; (3)＜200ns: -10V to 30V; (4)BOOT to PHASE: 15V; (5)BOOT to GND DC: -0.3V to VCC+15V; (6)＜200ns: -0.3V to 42V; (7)UGATE: VPHASE-0.3V to VBOOT + 0.3V; (8)LGATE: GND-0.3V to VCC + 0.3V; (9)DRV: GND-0.3V to VCC + 0.3V; (10)Input, Output or I/O Voltage: GND-0.3V to 7V; (11)Power Dissipation, PD @ TA = 25℃ SOP-14: 1W; (12)Package Thermal Resistance (Note 4); (13)SOP-14, θJA: 100℃/W; (14)Junction Temperature: 150℃; (15)Lead Temperature (Soldering, 10 sec.): 260℃; (16)Storage Temperature Range: -40℃ to 150℃; (17)ESD Susceptibility (Note 2); (18)HBM (Human Body Mode): 2kV; (19)MM (Machine Mode): 200V.

Features

RT9259AGS features: (1)Single 12V Bias Supply; (2)Support Dual Channel Power Conversion; (3)One Synchronous Rectified Buck PWM Controller; (4)One Linear Controller; (5)Both Controllers Drive Low Cost N-Channel MOSFETs; (6)Adjustable Frequency from 150kHz to 1MHz and Free-Run Frequency at 230kHz; (7)Small External Component Count; (8)Output Voltage Regulation; (9)PWM Controller : ±1% Accuracy; (10)LDO Controller : ±2% Accuracy; (11)Two Internal VREF Power Support Lower to 0.8V; (12)Adjustable External Compensation; (13)Linear Controller Drives N-Channel MOSFET Pass Transistor; (14)Fully-Adjustable Outputs; (15)Under Voltage Protection for Both Outputs; (16)Adjustable Over Current Protection; (17)RoHS Compliant and 100% Lead (Pb)-Free.

Diagrams