LTC3870 Datasheet | Linear Technology

Features LTC3870 Poly Phase Step-Down Slave Controller for Digital Power System Management Description n LTC3880 Family Phase Extender Supporting LTC3880/3880-1, LTC3883/3883-1, LTC3886, LTC3887 Master Controllers n Cascade with Multiple Chips for Very Large Current Applications n Accurate Poly Phase Current Sharing n EXTVCC Capable of 5V to 14V Input n Wide VIN Range: 4.5V to 60V n Wide Output Voltage Range : 0.5V to 14V n Wide SYNC Frequency Range: 100k Hz to 1MHz n Pin Programmable of CCM/DCM Operation n Pin Programmable of Phase-Shift Control n Integrated Powerful N-Channel MOSFET Gate Drivers n Available in a 28-Pin (4mm × 5mm) QFN Package Applications n High Power Distributed Power Systems n Tele Systems n Industrial Applications The LTC®3870 is a Poly Phase® step-down slave controller specially designed for multiphase operation with the LTC3880 family digital power system management DC/DC controllers. It provides a small and cost effective solution for supplying very large currents by cascading it with a master controller. A peak current mode architecture provides the LTC3870 with excellent current sharing from phase to phase and from chip to chip. Coherently working with the LTC3880 family, the LTC3870 does not require additional I2C addresses, and it supports all programmable Features as well as fault protection. The constant switching frequency can be synchronized to an external clock from the master controller from 100k Hz to 1MHz. L, LT, LTC, LTM, Poly Phase, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178, 5705919, 5929620, 6144194, 6177787, 6580258, 5408150 Typical Application VIN 4.7µF VOUT0 30A 1.0µH + 530µF 2.15k 0.2µF 0.1µF LTC3880- RUN0 3.3V VSENSE0+ RUN1 GPIO0 GPIO1 1.8V VSENSE1 ITH0 ITH1 SYNC - REFER TO LTC3880 DATA SHEET FOR MASTER SETUP VIN INTVCC TG0...