LTC3870EUFD#PBF

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Analog Devices

POLYPHASE STEP-DOWN SLAVE CONTROLLER FOR DIGITAL POWER SYSTEM MANAGEMENT

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LTC3870EUFD#PBF

Active

Analog Devices

POLYPHASE STEP-DOWN SLAVE CONTROLLER FOR DIGITAL POWER SYSTEM MANAGEMENT

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DocumentsDatasheet R526 Reliability Data

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3870EUFD#PBF

Clock Sync	True
Control Features	Current Limit, Enable, Phase Control, Frequency Control
Frequency - Switching	500 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Phases	2
Output Type	Transistor Driver
Package / Case	28-WFQFN Exposed Pad
Supplier Device Package	28-QFN (4x5)
Synchronous Rectifier	True
Topology	Buck
Voltage - Supply (Vcc/Vdd) [Max]	60 V
Voltage - Supply (Vcc/Vdd) [Min]	4.5 V

LTC3870-1 Series

PolyPhase Step-Down Slave Controller for Digital Power System Management

Part	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Control Features	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Output Configuration	Output Phases	Frequency - Switching	Package / Case	Output Type	Topology	Mounting Type	Function
Analog Devices LTC3870IUFD#TRPBF	4.5 V	60 V	Current Limit Enable Frequency Control Phase Control Soft Start	2	-40 °C	125 ¯C	28-QFN (4x5)	Positive	2	500 kHz	28-WFQFN Exposed Pad	Transistor Driver	Buck	Surface Mount	Step-Down
Analog Devices LTC3870EUF-1#TRPBF	4.5 V	60 V	Current Limit Enable Frequency Control Phase Control	2	-40 °C	125 ¯C	24-QFN (4x4)	Positive	2	500 kHz	24-WFQFN Exposed Pad	PWM Signal	Buck	Surface Mount	Step-Down
Analog Devices LTC3870IUFD#PBF	4.5 V	60 V	Current Limit Enable Frequency Control Phase Control Soft Start	2	-40 °C	125 ¯C	28-QFN (4x5)	Positive	2	500 kHz	28-WFQFN Exposed Pad	Transistor Driver	Buck	Surface Mount	Step-Down
Analog Devices LTC3870EUFD#PBF	4.5 V	60 V	Current Limit Enable Frequency Control Phase Control	2	-40 °C	125 ¯C	28-QFN (4x5)	Positive	2	500 kHz	28-WFQFN Exposed Pad	Transistor Driver	Buck	Surface Mount	Step-Down

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 8.28
		10	$ 5.56
		73	$ 4.20
		146	$ 3.87
		292	$ 3.59
		511	$ 3.55

Description

General part information

LTC3870-1 Series

The LTC3870-1 is a PolyPhase®step-down slave controller specially designed for multiphase operation with LTC's 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 LTC3887-1 controller. A peak current mode architecture provides the LTC3870-1 with excellent current sharing from phase to phase and from chip to chip.Coherently working with the LTC3887-1, the LTC3870-1 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 LTC3887-1 over a range of 100kHz to 1MHz.Onboard MOSFET Gate DriversPackageLTC3870Yes4x5 QFN-28LTC3870-1No – Works with DrMOS and Power Blocks4x4 QFN-24ApplicationsHigh Power Distributed Power SystemsTelecom SystemsIndustrial Applications