RELIABLE MINIATURIZATION TECHNOLOGIES FOR ELECTRONICS

3 D P M 0 2 3 7 - 2

Source and Sink current capability ±1A

Input Voltage Range (VDD) : 1.6V to 2.8V

JESD8-15A JEDEC standard compatible

VTT Output Voltage Ripple to within ±40 mV

Remote VTT Voltage Sensing

VTT Soft Start Function

Thermal Protection

No external output capacitors needed

Space Qualified Technology

Radiation Hardened designTID > 50 krad(Si)

SEL LET > 80MeV.cm2/mg

SET Immune > 80MeV.cm2/mg

Temperature Range -40°C / +105°C

Compact Size and Low Weight

24-pin SOP

ITAR Free Product - Worldwide delivery guaranty

Size: 20 x 20 x 13.2 mm

Mass: 15 g

Memory system architectures using DDRII technology need to be compliant with JEDEC JESD8-15Astandard. Therefore a bus termination regulator able to sink and source current while regulating VTT

voltage is used for this purpose. The module has been specifically designed for low input voltage, lownoise and high reliability systems.

The 3DPM0237-2 maintains a fast transient and supports a remote sensing function and all powerrequirements for DDRII VTT bus and is available in a thermally-efficient package. Also, it can be usedfor any other device DDR memory device (DDR, DDR2) for all the space applications: sciences and deepspace missions, Earth observation, navigation, launchers and manned space vehicles.

RELIABLE MINIATURIZATION TECHNOLOGIES FOR ELECTRONICS

DDRII TERMINATION REGULATOR S I N K / S O U R C E ± 1 AT I G H T R E G U L AT E D V T T O U T P U T R A D I AT I O N H A R D E N E D D E S I G N

K E Y F E AT U R E S

P R O D U C T O V E R V I E W

DDRII memory devices use a high speed data buswhich has to be terminated. Termination is made bymeans of a voltage regulator which shall sink andsource current depending on bus demand. One of themost critical aspects of DDRII TR module is itscapability to maintain the regulated VTT output withinthe regulation limits (VREF ±40mV) regardless of theoutput load. This tight regulation performance can beachieved by using an innovative Bang-Bang regulationprinciple, chosen for its speed performance and toguarantee an output voltage that remains within thepredefined limits regardless of any output currenttransients.

The output filter type is selected to make the modulerugged to any overload condition without complexprotection circuits. No external filters or decouplingcapacitors are needed. A dedicated VTT_SENSE pin isalso provided if remote VTT sensing.

R E L I A B L E M I N I A T U R I Z A T I O NT E C H N O L O G I E S F O R E L E C T R O N I C S

w w w . 3 d - p lu s . c o m

P R O D U C T P E R F O R M AN C E S

PIN DESCRIPTION

VDD Supply voltage pins used to power the output stage of the DDR2 TR (VTT output)

VAUX Auxiliary supply pins used to power the internal control circuits of the DDR2 TR

GND Ground pins

VREF_IN Input reference voltage pin, shall be set to VDD/2

VREF_OUT Buffered output reference voltage pin. This output may be used to provide the memory with the reference voltage

VTT Regulated output voltage pins, capable of sinking and sourcing up to 1A while regulating to input reference voltage VREF_IN

VTT_SENSEVTT sensing pin, used for improving remote load regulation. If remote sensing is not needed, this pin shall be connected to VTT

output pins. This pin shall never be left open

ENActive high enable command, used to set VTT output in regulation mode. When connected to GND, VTT output is in high impedance (Suspend to RAM mode)

DNU Do Not Use pins. These pins shall be left open

PARAMETER SYMBOL MIN TYP MAX UNIT

INPUT & OUTPUT SPECIFICATIONS

Input Voltage VDD 1.6 1.8 2.8 V

Auxiliary Suply Voltage VAUX 3 6 V

Auxiliary Supply Current IAUX 10 55 mA

Output Voltage VTTVREF_IN

-40mV

VREF_IN VREF_IN

+40mVV

Output Current IOUT -1 1 A

Output Current Speed Change dIOUT/dt 10A/µs

COMMANDS

Input Reference Voltage VREF_IN 0.5 2 V

Buffered Reference Voltage VREF_OUTVREF_IN

-1mVVREF_IN

VREF_IN

+1mVV

Buffered Reference Output Current IREF_OUT -350 350 µA

Enable Level

VAUX = 3V 2.2 V

VAUX = 6V 2.7 V

Inhibit Level

VAUX = 3V 0.6 V

VAUX = 6V 0.7 V

PROTECTIONS

Internal Shutdown Temperature - +120 +135 °C

Junction Temperature - -40 +125 °C

TEMPERATURE RANGES

C : Commercial (0°C to 70°C)

I : Industrial (-40°C to +85°C)

S : Specific (-40°C to +105°C)

ORDERING INFORMATION

QUALITY GRADES

N : Commercial

B : Industrial

S : Space

P I N D E S C R I P T I O N

Part Number – X X – X00X

Quality Grade

Temperature Range

Options

PAC K AG E

www.3d-plus.com

CO

PY

RIG

HT

3D

PL

US

-JU

NE

2017