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BD3539FVM_10

Description
Termination Regulators for DDR-SDRAMs
File Size446KB,12 Pages
ManufacturerROHM Semiconductor
Websitehttps://www.rohm.com/
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BD3539FVM_10 Overview

Termination Regulators for DDR-SDRAMs

Hi-performance Regulator IC Series for PCs
Termination Regulators
for DDR-SDRAMs
BD3539FVM,BD3539NUX
No.09030EAT24
Description
BD3539FVM/NUX is a termination regulator compatible with JEDEC DDR1-SDRAM, DDR2-SDRAM, DDR3-SDRAM which
functions as a linear power supply incorporating an N-channel MOSFET and provides a sink/source current capability up to
1A respectively. A built-in high-speed OP-AMP specially designed offers an excellent transient response. Requires 3.3
volts (DDR2, DDR3) or 5.0 volts (DDR1, DDR2, DDR3) as a bias power supply to drive the N-channel MOSFET. Has an
independent reference voltage input pin (VDDQ) and an independent feedback pin (VTTS) to maintain the accuracy in
voltage required by JEDEC, and offers an excellent output voltage accuracy and load regulation. Also has a reference
power supply output pin (VREF) for DDR-SDRAM or a memory controller. When EN pin turns to “Low”, VTT output
becomes “Hi-Z” while VREF output is kept unchanged, compatible with “Self Refresh” state of DDR-SDRAM.
Features
1) Incorporates a push-pull power supply for termination (VTT)
2) Incorporates a reference voltage circuit (VREF)
3) Incorporates an enabler
4) Incorporates an under voltage lockout (UVLO)
5) Employs MSOP8 package : 2.9×4.0×0.9(mm) : BD3539FVM
6) Employs VSON008X2030 package : 2.0×3.0×0.6(mm) : BD3539NUX
7) Incorporates a thermal shutdown protector (TSD)
8) Operates with input voltage from 2.7 to 5.5 volts
9) Compatible with Dual Channel (DDR1, DDR2, DDR3)
10) Usable ceramic capacitor at output
Use
Power supply for DDR1- SDRAM (VCC=5V only)
Power supply for DDR2-SDRAM (VCC=3.3V or 5V)
Power supply for DDR3-SDRAM (VCC=3.3V or 5V)
●ABSOLUTE
MAXIMUM RATINGS
Parameter
Input Voltage
Enable Input Voltage
Termination Input Voltage
VDDQ Reference Voltage
Output Current
Power Dissipation1
Power Dissipation2
Power Dissipation3
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature
Symbol
VCC
VEN
VTT_IN
VDDQ
ITT
Pd1
Pd2
Pd3
Topr
Tstg
Tjmax
Limit
BD3539FVM
7
*1*2
7
*1*2
7
*1*2
7
*1*2
1
387.4
*3
587.4
*4
-
-30½+100
-55½+150
+150
242.0
*4
515.0
*5
877.2
*6
BD3539NUX
Unit
V
V
V
V
A
mW
mW
mW
*1 Should not exceed Pd.
*2 Instantaneous surge voltage, back electromotive force and voltage under less than 10% duty cycle.
*3 With Ta≧25℃ (With no heat sink)
θja=322.6℃/W
*4 With Ta≧25℃ when mounting a 70mm×70mm×1.6mm glass-epoxy substrate, with no heat sinkθja=212.8℃/W
*5 With Ta≧25℃ (With no heat sink)
θja=516.5℃/W
*6 With Ta≧25℃ when mounting a 70mm×70mm×1.6mm glass-epoxy substrate 1-layer board,
θja=242.7℃/W
*7 With Ta≧25℃ when mounting a 70mm×70mm×1.6mm glass-epoxy substrate 4-layer board
(copper foil density: 5505mm
2
(copper foil area in each layer) ),
θja=142.5℃/W
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
1/11
2009.10 - Rev.A

BD3539FVM_10 Related Products

BD3539FVM_10 BD3539FVM BD3539NUX
Description Termination Regulators for DDR-SDRAMs Termination Regulators for DDR-SDRAMs Termination Regulators for DDR-SDRAMs
Is it lead-free? - Lead free Lead free
Is it Rohs certified? - conform to conform to
Maker - ROHM Semiconductor ROHM Semiconductor
Parts packaging code - MSOP SON
package instruction - VSSOP, HVSON,
Contacts - 8 8
Reach Compliance Code - compli compli
ECCN code - EAR99 EAR99
Differential output - NO NO
Interface integrated circuit type - BUS TERMINATOR SUPPORT CIRCUIT BUS TERMINATOR SUPPORT CIRCUIT
JESD-30 code - R-PDSO-G8 R-PDSO-N8
JESD-609 code - e2 e3
length - 2.9 mm 3 mm
Number of functions - 1 1
Number of terminals - 8 8
Maximum operating temperature - 100 °C 100 °C
Minimum operating temperature - -30 °C -30 °C
Package body material - PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code - VSSOP HVSON
Package shape - RECTANGULAR RECTANGULAR
Package form - SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius) - 260 260
Certification status - Not Qualified Not Qualified
Maximum seat height - 0.9 mm 0.6 mm
Maximum supply voltage - 5.5 V 5.5 V
Minimum supply voltage - 2.7 V 2.7 V
Nominal supply voltage - 3.3 V 3.3 V
surface mount - YES YES
Temperature level - OTHER OTHER
Terminal surface - Tin/Copper (Sn/Cu) Matte Tin (Sn)
Terminal form - GULL WING NO LEAD
Terminal pitch - 0.65 mm 0.5 mm
Terminal location - DUAL DUAL
Maximum time at peak reflow temperature - 10 10
width - 2.8 mm 2 mm
Base Number Matches - 1 1
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