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See Technical Specifications

LTC3855EFE#PBF

Dual, Multiphase Synchronous DC/DC Controller with Differential Remote Sense

Manufacturer:

Analog Devices, Inc
Mfr.Part #:

LTC3855EFE#PBF
Datasheet:

LTC3855EFE#PBF Datasheet (PDF)
packingQty:

Tube,50
packingOption:

Tube
tempRange:

-40 to 125C
Output Voltage:

600 mV to 12.5 V
EDA/CAD Models:

Request Free CAD Models for LTC3855EFE#PBF

Email: [email protected]

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Tel: +852 95804164

LTC3855EFE#PBF General Description

The LTC3855 is a dual PolyPhase^® current mode synchronous step-down switching regulator controller that drives all N-channel power MOSFET stages. It includes a high speed differential remote sense amplifier. The maximum current sense voltage is programmable for either 30mV, 50mV or 75mV, allowing the use of either the inductor DCR or a discrete sense resistor as the sensing element.

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Key Features

Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
High Efficiency: Up to 95%
R_SENSE or DCR Current Sensing
Programmable DCR Temperature Compensation
±0.75% 0.6V Output Voltage Accuracy
Phase-Lockable Fixed Frequency 250kHz to 770kHz
True Remote Sensing Differential Amplifier
Dual N-Channel MOSFET Synchronous Drive
Wide V_IN Range: 4.5V to 38V
V_OUT Range: 0.6V to 12.5V without Differential Amplifier
V_OUT Range: 0.6V to 3.3V with Differential Amplifier
Clock Input and Output for Up to 12-Phase Operation
Adjustable Soft-Start or V_OUT Tracking
Foldback Output Current Limiting
Output Overvoltage Protection
40-Pin (6mm × 6mm) QFN and 38-Lead FE Packages

Application

Computer Systems
Telecom Systems
Industrial and Medical Instruments
DC Power Distribution Systems

Specifications

model	LTC3855EFE#PBF	packingQty	Tube,50
packingOption	Tube	lifeCycle	production
tempRange	-40 to 125C	Product Category	Switching Voltage Regulators
Output Voltage	600 mV to 12.5 V	Output Current	30 A
Input Voltage, Max	38 V	Number of Outputs	2 Output
Topology	Buck	Mounting Style	SMD/SMT
Switching Frequency	770 kHz	Quiescent Current	30 uA
Minimum Operating Temperature	- 40 C	Maximum Operating Temperature	+ 85 C
Series	LTC3855	Input Voltage, Min	4.5 V
Development Kit	DC1441A, DC1586A, DC1617A-A, DC1617A-B	Input Voltage	4.5 V to 38 V
Load Regulation	0.01 %	Operating Supply Current	3.5 mA
Product Type	Switching Voltage Regulators	Shutdown	Shutdown
Factory Pack Quantity	50	Subcategory	PMIC - Power Management ICs
Type	Multiphase Synchronous DC/DC Controller with Differential Remote Sense	Unit Weight	0.003313 oz