Analog Devices LT7852 | Demoboard LTC7852/LTC7852-1

Description

The LT C®7852/LTC7852-1 is a six-phase, dual output current mode synchronous step-down switching regu-lator controller that works in conjunction with external power train devices such as DrMOS, power blocks or discrete N-channel MOSFETs and associated gate drivers. Its flexible design enables 1-, 2-, 3-, 4-, 5-, and 6-phase configurations. The LTC7852 offers a unique feature that enhances the signal-to-noise ratio of the current sense signal, allowing the use of inductors with very low DC winding resistances for maximum efficiency. The controller achieves a minimum on-time of just 40ns, permitting the use of high switching frequency at high step-down ratios. 8-, 10- or 12 phases with two ICs can be paralleled for very 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 LTC7852-1

Typical applications

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

More information

• Datasheet