Datasheet Linear Technology LTC3831IGN#TRPBF

Manufacturer	Linear Technology
Series	LTC3831
Part Number	LTC3831IGN#TRPBF

High Power Synchronous Switching Regulator Controller for DDR Memory Termination

Datasheets

PDF, 219 Kb, Revision: B, File uploaded: Sep 23, 2017

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Prices

Packaging

Package	SSOP-16
Package Code	GN
Package Index	05-08-1641 (GN16)

Parametrics

Architecture	Constant Frequency Voltage Mode
Demo Boards	DC470A
Design Tools	LTspice Model
Export Control	no
Features	No Rsense, DDR Mode, Resistor Set Frequency, External Synchronization
Frequency	500 kHz
Frequency Adjust Range	100kHz - 500kHz
Frequency Sync Range	100kHz - 500kHz
Integrated Inductor	no
Ishutdown	1 µA
Isupply	0.7 mA
Monolithic	no
Number of Outputs	1
Operating Temperature Range	-40 to 85 °C
Output Current	20 A
Polyphase	no
Sense Resistor	None
Switch Current	20 A
Synchronous	yes
Topology	Buck
Vin Max	8 V
Vin Min	3 V
Vout Max	8 V
Vout Maximum	VIN/2
Vout Min	1.25 V

Eco Plan

RoHS

Compliant

Articles

Download
High Efficiency DDR Termination Power Supplies Source and Sink More than 10 Amps &mdash LT Journal
PDF, 205 Kb, File published: Mar 1, 2002
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DESIGN FEATURES High Efficiency DDR Termination
Power Supplies Source and Sink
More than 10 Amps
by Wei Chen
Introduction
The emerging standard for system
memory in computing and communication systems is Double Data Rate
(DDR) memory. Typical DDR memory
needs at least two main power supplies: VDD and VTT, where VDD powers
the I/O, and VTT powers the I/O termination. To ensure good signal
quality and fast data rate, the termination power supply VTT must always
track the VDD supply with VTT = VDD/
2. Since the termination resistors can
carry current in either direction, the
VTT power supply must be able to
both source and sink current while
tracking the VDD supply. A typical
DDR termination power supply for a
PC application requires 2A to 10A of
current. In servers, high power workstations or broadband networking
equipment applications, the DDR termination supply current may well
exceed 10A. At these current levels, a
linear regulator is not a viable solu-VDD …

Model Line

Series: LTC3831 (4)

LTC3831EGN#PBF LTC3831EGN#TRPBF LTC3831IGN#PBF LTC3831IGN#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > DDR Memory/Bus Termination

Other Names:

LTC3831IGNTRPBF, LTC3831IGN TRPBF

EMS supplier

Slices

Microcontrollers