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LTC3831EGN-1#TRPBF

High Power Synchronous Switching Regulator Controller for DDR Memory Termination

Manufacturer:

Analog Devices Inc.
Mfr.Part #:

LTC3831EGN-1#TRPBF
Datasheet:

LTC3831EGN-1#TRPBF Datasheet (PDF)
Output Voltage:

1.25 V to 8 V
Output Current:

20 A
Input Voltage, Max:

8 V
Number of Outputs:

1 Output
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LTC3831EGN-1#TRPBF General Description

The LTC3831-1 is a high power, high efficiency switching regulator controller designed for DDR memory termination. The LTC3831-1 generates an output voltage equal to 1/2 of an external supply or reference voltage. The LTC3831-1 uses a synchronous switching architecture with N-channel MOSFETs. Additionally, the chip senses output current through the drain-source resistance of the upper N-channel FET, providing an adjustable current limit without a current sense resistor.

Key Features

V_OUT as Low as 0.4V
High Power Switching Regulator Controller for DDR Memory Termination
V_OUT Tracks 1/2 of V_IN or External V_REF
No Current Sense Resistor Required
Low V_CC Supply: 3V to 8V
Maximum Duty Cycle > 91% Over Temperature
Drives All N-Channel External MOSFETs
High Efficiency: Up to 95%
Programmable Fixed Frequency Operation: 100kHz to 500kHz
External Clock Synchronization Operation
Programmable Soft-Start
Low Shutdown Current: <10µA
Overtemperature Protection
Available in 16-Pin Narrow SSOP Package

Application

DDR SDRAM Termination
SSTL_2, SSTL_3 Interface
HSTL Interface

Specifications

Product Category	Switching Voltage Regulators	Output Voltage	1.25 V to 8 V
Output Current	20 A	Input Voltage, Max	8 V
Number of Outputs	1 Output	Topology	Buck
Mounting Style	SMD/SMT	Switching Frequency	100 kHz to 500 kHz
Minimum Operating Temperature	- 40 C	Maximum Operating Temperature	+ 85 C
Series	LTC3831-1	Input Voltage, Min	3 V
Height	1.75 mm	Input Voltage	3 V to 8 V
Load Regulation	2 mV	Operating Supply Current	700 uA
Product Type	Switching Voltage Regulators	Shutdown	Shutdown
Factory Pack Quantity	2500	Subcategory	PMIC - Power Management ICs
Type	High Power Synchronous Switching Regulator Controller for DDR Memory Termination