Analog Devices LTC7852

Description

The LTC®7852/LTC7852-1 is a six-phase, dual outputcurrent mode synchronous step-down switching regulatorcontroller that works in conjunction with externalpower train devices such as DrMOS, power blocks ordiscrete N-channel MOSFETs and associated gate drivers.Its flexible design enables 1-, 2-, 3-, 4-, 5-, and 6-phaseconfigurations. The LTC7852 offers a unique feature thatenhances the signal-to-noise ratio of the current sensesignal, allowing the use of inductors with very low DCwinding resistances for maximum efficiency. The controllerachieves a minimum on-time of just 40ns, permitting theuse of high switching frequency at high step-down ratios.8-, 10- or 12 phases with two ICs can be paralleled forvery high current requirements up to 400A.

Features

• Sub-Milliohm DCR Sensing or DrMOS with CurrentSense Improves Efficiency
• Operates with Power Blocks, DrMOS or External Gate Drivers and MOSFETs
• ±0.5% Total Output Voltage Accuracy
• Flexible Phase Configuration
• Dual Output Current Monitoring
• tON(MIN) = 40ns, Capable of Very Low Duty Cycles atHigh Frequency
• Dual Differential Remote Sensing Amplifiers
• Programmable Frequency Range of 250kHz to 1.2MHz
• VIN Range Is Not Limited by IC
• VCC Range: 4.5V to 5.5V
• VOUT Range: 0.5V to 2.0V
• 48 Lead (5mm × 6mm) GQFN for LTC7852
• 36 Lead (4mm × 5mm) QFN for LTC7852-1Sub-Milliohm DCR Sensing or DrMOS with CurrentSense Improves Efficiencynn Operates with Power Blocks, DrMOS or ExternalGate Drivers and MOSFETsnn ±0.5% Total Output Voltage Accuracynn Flexible Phase Configurationnn Dual Output Current Monitoringnn tON(MIN) = 40ns, Capable of Very Low Duty Cycles atHigh Frequency

Typical applications

• Telecom and Datacom Systems
• Computer Systems
• DC Power Distribution Systems

More information

• Datasheet
• IC product information