RT8204BGQW

Product Summary

The RT8204BGQW is a PWM controller. It provides the high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high-voltage batteries to generate low-voltage CPU core, I/O, and chipset RAM supplies in notebook computers. The RT8204BGQW achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by its ability to drive very large synchronous rectifier MOSFETs. The buck conversion allows this device to directly step down high-voltage batteries for the highest possible efficiency. The applications of the RT8204BGQW include Notebook Computers, CPU Core Supply, Chipset/RAM Supply as Low as 0.75V.

Parametrics

RT8204BGQW absolute maximum ratings: (1)Input Voltage, TON to GND: -0.3V to 32V; (2)BOOT to GND: -0.3V to 38V; (3)PHASE to BOOT: -6V to 0.3V; (4)PHASE to GND DC: -0.3V to 32V; (5)＜20ns: -8V to 38V; (6)VDD, VDDP, VOUT, EN/DEM, LEN, LFB, FB, PGOOD, LPGOOD, LDRV to GND: -0.3V to 6V; (7)UGATE to PHASE DC: -0.3V to 6V; (8)＜20ns: -5V to 7.5V; (9)OC to GND: -0.3V to 28V; (10)LGATE to GND DC: -0.3V to 6V; (11)＜20ns: -2.5V to 7.5V; (12)Power Dissipation, PD @ TA = 25℃ WQFN-16L 3x3: 1.471W; (13)Package Thermal Resistance (Note 4) WQFN-16L 3x3, θJA: 68℃/W; (14)WQFN-16L 3x3, θJC: 7.5℃/W; (15)Lead Temperature (Soldering, 10 sec.): 260℃; (16)Junction Temperature: 150℃; (17)Storage Temperature Range: -65℃ to 150℃; (18)ESD Susceptibility (Note 2) HBM (Human Body Mode): 2kV; (19)MM (Machine Mode): 200V.

Features

RT8204BGQW features: (1)Ultra-High Efficiency; (2)Resistor Programmable Current Limit by Low-Side RDS(ON) Sense (Lossless Limit) or Sense Resistor (High Accuracy); (3)Quick Load-Step Response within 100ns; (4)1% VOUT Accuracy Over Line and Load; (5)Adjustable 0.75V to 3.3V Output Range; (6)3V to 26V Battery Input Range; (7)Resistor Programmable Frequency; (8)Over/Under Voltage Protection; (9)2 Steps Current Limit During Soft-Start; (10)Drives Large Synchronous-Rectifier FETs; (11)Power-Good Indicator; (12)1.5% Accuracy Over Line and Load; (13)Adjustabe Output Voltage down to 0.75V; (14)Independent Enable and Power Good Indicator; (15)Drive N-MOSFETs within Rail to Rail Controller Voltage; (16)MLCC and POSCAP Stable; (17)RoHS Compliant and 100% Lead (Pb)-Free.

Diagrams