LTC3870

RECOMMENDED FOR NEW DESIGNS

PolyPhase Step-Down Slave Controller for Digital Power System Management

Analog Devices LTC3870 Product Info

10 February 2026 7

Features

LTC3880 Family Phase Extender Supporting LTC3880/3880-1, LTC3883/3883-1, LTC3886, LTC3887 Master Controllers
Cascade with Multiple Chips for Very Large Current Applications
Accurate PolyPhase Current Sharing
EXTV_CC Capable of 5V to 14V Input
Wide V_IN Range: 4.5V to 60V

Wide Output Voltage Range : 0.5V to 14V
Wide SYNC Frequency Range: 100kHz to 1MHz
Pin Programmable of CCM/DCM Operation
Pin Programmable of Phase-Shift Control
Integrated Powerful N-Channel MOSFET Gate Drivers
Available in a 28-Pin (4mm × 5mm) QFN Package

Part details & applications

The LTC3870 is a PolyPhase^® 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 100kHz to 1MHz.


	Onboard MOSFET Gate Drivers	Package
LTC3870	Yes	4x5 QFN-28
LTC3870-1	No – Works with DrMOS and Power Blocks	4x4 QFN-24

Applications

High Power Distribute

Subscribe to Welllinkchips !

Your Name

* Email