MAX8743EEI+T

Product Summary

The MAX8743EEI+T is a dual pulse-width modulation (PWM) controller configured for step-down (buck) topologies that provides the high efficiency, excellent transient response, and high DC output accuracy necessary for stepping down high-voltage batteries to generate lowvoltage chipset and RAM power supplies in notebook computers. The CS_ inputs of the MAX8743EEI+T can be used with low-side sense resistors to provide accurate current limits or can be connected to LX_, using low-side MOSFETs as current-sense elements. The MAX8743EEI+T is used in Notebook Computers, CPU Core Supplies, Chipset/RAM Supplies as Low as 1V, 1.8V and 2.5V I/O Supplies.

Parametrics

MAX8743EEI+T absolute maximum ratings: (1)V+ to AGND: -0.3 to +30V; (2)VCC to AGND: -0.3V to +6V; (3)VDD to PGND: -0.3V to +6V; (4)AGND to PGND: -0.3V to +0.3V; (5)PGOOD, OUT_ to AGND: -0.3V to +6V; (6)OVP, UVP, ILIM_, FB_, REF, SKIP, TON, ON_ to AGND: -0.3V to (VCC + 0.3V); (7)DL_ to PGND: -0.3V to (VDD + 0.3V); (8)BST_ to AGND: -0.3V to +36V; (9)CS_ to AGND: -6V to +30V; (10)DH1 to LX1: -0.3V to (VBST1 + 0.3V); (11)LX_ to BST_ : -6V to +0.3V; (12)DH2 to LX2: -0.3V to (VBST2 + 0.3V); (13)REF Short Circuit to GND: Continuous; (14)Operating Temperature Range: -40℃ to +85℃; (15)Junction Temperature: +150℃; (16)Storage Temperature Range: -65℃ to +150℃; (17)Lead Temperature (soldering, 10s): +300℃.

Features

MAX8743EEI+T features: (1)Ultra-High Efficiency; (2)Accurate Current-Limit Option; (3)Quick-PWM with 100ns Load-Step Response; (4)1% VOUT Accuracy over Line and Load; (5)High Output Impedance in Shutdown; (6)Dual Mode Fixed 1.8V/1.5V/Adj or 2.5V/Adj Outputs; (7)Adjustable 1V to 5.5V Output Range; (8)2V to 28V Battery Input Range; (9)200kHz/300kHz/420kHz/540kHz Nominal Switching Frequency; (10)Adjustable Overvoltage Protection; (11)1.7ms Digital Soft-Start; (12)Drives Large Synchronous-Rectifier FETs; (13)Power-Good Window Comparator; (14)2V ± 1% Reference Output.

Diagrams