UCD7242RSJR

Product Summary

The UCD7242RSJR is a Digital Dual Synchronous-Buck Power Driver. The UCD7242RSJR is a complete power system ready to drive two independent buck power supplies. High side MOSFETs, low side MOSFETs, drivers, current sensing circuitry and necessary protection functions are all integrated into one monolithic solution to facilitate minimum size and maximum efficiency. Driver circuits provide high charge and discharge current for the high-side NMOS switch and the low-side NMOS synchronous rectifier in a synchronous buck circuit. The MOSFET gates are driven to +6.25 V by an internally regulated VGG supply. The internal VGG regulator can be disabled to permit the user to supply an independent gate drive voltage. This flexibility allows a wide power conversion input voltage range of 2.2V to 18V. Internal under voltage lockout (UVLO) logic ensures VGG is good before allowing chip operation. The applications of the UCD7242RSJR include Digitally-Controlled Synchronous-Buck Power Stages and High Current Dual-Phase VRM/EVRD Regulators for Desktop, Server, Telecom and Notebook Processors.

Parametrics

UCD7242RSJR absolute maximum ratings: (1)VIN Supply voltage: –0.3 to 20 V; (2)DC: –0.3 to SW + 7 V; (3)BST Boot voltage AC(2): 34 V; (4)VGG, VGG_DIS Gate supply voltage: 7 V; (5)BP3 Logic supply voltage: 4 V; (6)DC: –2 to VIN + 1 V; (7)SW, BSW Switch voltage AC(2): 34 V; (8)TMON, IMON, Testmode Analog outputs:–0.3 to 3.6 V; (9)PWM-A, PWM-B, SRE-A, SRE-B, FLT-A, FLT-B Digital I/O’s: –0.3 to 5.5 V; (10)Junction temperature: –55 to 150℃; (11)Tstg Storage temperature: –55 to 150℃; (12)ESD rating HBM: Human Body model: 2000 V; (13)CDM: Charged device model: 500 V.

Features

UCD7242RSJR features: (1)Fully Integrated Power Switches With Drivers for Dual Synchronous Buck Converters; (2)Full Compatibility With TI Fusion Digital Power Supply Controllers, Such as the UCD92xx Family; (3)Wide Input Voltage Range: 4.75 V to 18 V Operational Down to 2.2 V Input With an External Bias Supply; (4)Up to 10A Output Current per Channel; (5)Operational to 2 MHz Switching Frequency; (6)High Side Current Limit With Current Limit Flag; (7)Onboard Regulated 6V Driver Supply From VIN; (8)Thermal Protection; (9)Temperature Sense Output -Voltage Proportional to Chip Temperature; (10)UVLO and OVLO Circuits Ensure Proper Drive Voltage; (11)Rated From -40℃ to 125℃ Junction Temperature; (12)RoHS Compliant; (13)Accurate On-Die Current Sensing (±5%).

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