LTC3831EGN#PBF

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Analog Devices Inc./Maxim Integrated

HIGH POWER SYNCHRONOUS SWITCHING REGULATOR CONTROLLER FOR DDR MEMORY TERMINATION

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LTC3831EGN#PBF

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Analog Devices Inc./Maxim Integrated

HIGH POWER SYNCHRONOUS SWITCHING REGULATOR CONTROLLER FOR DDR MEMORY TERMINATION

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3831 Series

The LTC3831 is a high power, high efficiency switching regulator controller designed for DDR memory termination. The LTC3831 generates an output voltage equal to 1/2 of an external supply or reference voltage. The LTC3831 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.The LTC3831 operates with input supply voltage as low as 3V and with a maximum duty cycle of >91%. It includes a fixed frequency PWM oscillator for low output ripple operation. The 200kHz free-running clock frequency can be externally adjusted or synchronized with an external signal from 100kHz to above 500kHz. In shutdown mode, the LTC3831 supply current drops to <10µA.Feedback VoltageAccuracy Over TempLTC38311.25V1.5%LTC3831-10.75V1.6%ApplicationsDDR SDRAM TerminationSSTL_2 InterfaceSSTL_3 Interface

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3831EGN#PBF

Applications	Controller, DDR
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Package Length	0.154 in
Package Name	16-SSOP
Package Width	3.9 mm
Voltage - Input (Maximum)	8 V
Voltage - Input (Minimum)	3 V
Voltage - Output (Max)	4 V
Voltage - Output (Min)	1.27 V

LTC3831 Series

High Power Synchronous Switching Regulator Controller for DDR Memory Termination

Part	Mounting Type	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Package Width	Package Name	Package Length	Operating Temperature (Min)	Operating Temperature (Max)	Number of Outputs	Applications	Voltage - Output (Max)	Voltage - Output (Min)
Analog Devices Inc./Maxim Integrated LTC3831IGN#PBF	Surface Mount	3 V	8 V	3.9 mm	16-SSOP	0.154 in	-40 °C	85 °C	1	Controller DDR	4 V	1.27 V
Analog Devices Inc./Maxim Integrated LTC3831EGN#PBF	Surface Mount	3 V	8 V	3.9 mm	16-SSOP	0.154 in	-40 °C	85 °C	1	Controller DDR	4 V	1.27 V
Analog Devices Inc./Maxim Integrated LTC3831IGN#TRPBF	Surface Mount	3 V	8 V	3.9 mm	16-SSOP	0.154 in	-40 °C	85 °C	1	Controller DDR	4 V	1.27 V
Analog Devices Inc./Maxim Integrated LTC3831EGN#TRPBF	Surface Mount	3 V	8 V	3.9 mm	16-SSOP	0.154 in	-40 °C	85 °C	1	Controller DDR	4 V	1.27 V

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC3831EGN#PBF | Datasheet

R320 Reliability Data