ROHM BD3538FVM Technical data
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STRUCTURE Silicon Monolithic Integrated Circuit
TYPE Regulator IC for Memory Termination
PRODUCT SERIES
BD3538FVM
FUNCTION ・Built-in Push-pull Amplifier for Termination (VTT)
・Built-in Reference Voltage Circuit (VREF)
・Dual Channel (DDR-Ⅱ)
○ABSOLUTE MAXIMUM RATINGS（Ta=25℃）
Parameter Symbol Limit Unit
Input Voltage VCC 7
Enable Input Voltage VEN 7
Termination Input Voltage VTT_IN 7
VDDQ Reference Voltage VDDQ 7
*1*2
V
*1*2
V
*1*2
V
*1*2
V
Output Current ITT 1 A
Power Dissipation Pd 437.5 *3 mW
Operating Temperature Range Topr
Storage Temperature Range Tstg
Maximum Junction Temperature Tjmax +150
*1 Should not exceed Pd.
*2 Instantaneous surge voltage, back electromotive force and voltage under less than 10% duty cycle.
*3 Reduced by 3.5mW for each increase in Ta of 1℃ over 25℃（With no heat sink）.
-40～+105 ℃
-55～+150 ℃
℃
○OPERATING CONDITIONS（Ta=25℃）
Parameter Symbol MIN MAX Unit
Input Voltage VCC 2.7 5.5 V
Termination Input Voltage VTT_IN 1.0 5.5 V
VDDQ Reference Voltage VDDQ 1.0 2.75 V
Enable Input Voltage VEN -0.3 5.5 V
★ This product is designed for protection against radioactive rays.
Status of this document
The Japanese version of this document is the official specification.
This translated version is intended only as a reference, to aid in understanding the official version.
If there are any differences between the original and translated versions of this document, the official Japanese language version takes priority.
REV. B
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○ELECTRICAL CHARACTERISTICS
Parameter Symbol
(unless otherwise noted, Ta=25℃, VCC=3.3V, VEN=3V, VDDQ=1.8V, VTT_IN=1.8V）
Standard Value
MIN TYP MAX
Unit Condition
Standby Current IST - 0.5 1.0 mA VEN=0V
Bias Current ICC - 2 4 mA VEN=3V
[Enable]
High Level Enable Input
Voltage
Low Level Enable Input
Voltage
VENHIGH 2.3 - 5.5 V
VENLOW -0.3 - 0.8 V
Enable Pin Input Current IEN - 7 10 uA VEN=3V
[Termination]
Termination Output Voltage 1 VTT1 VREF-30m VREF VREF+30m V
ITT=-1.0A to 1.0A
Ta=0℃ to 105℃
VCC=5V, VDDQ=2.5V
Termination Output Voltage 2 VTT2 VREF-30m VREF VREF+30m V
VTT_IN=2.5V
ITT=-1.0A to 1.0A
Ta=0℃ to 105℃
Source Current ITT+ 1.0 - - A
Sink Current ITT- - - -1.0 A
Load Regulation
⊿VTT
- - 50 mV ITT=-1.0A to 1.0A
Line Regulation Reg.l - 20 40 mV
Upper Side ON Resistance 1 HRON1 - 0.45 0.9
Lower Side ON Resistance 1 LRON1 - 0.45 0.9
Upper Side ON Resistance 2 HRON2 - 0.4 0.8
Lower Side ON Resistance 2 LRON2 - 0.4 0.8
Ω
Ω
Vcc=5V, VDDQ=2.5V
Ω
VTT_IN=2.5V
Vcc=5V, VDDQ=2.5V
Ω
VTT_IN=2.5V
[Input of Reference Voltage]
Input Impedance ZVDDQ 70 100 130
Output Voltage 1 VREF1
Output Voltage 2 VREF2
1/2×VDDQ
-18m
1/2×VDDQ
-40m
1/2×VDDQ
1/2×VDDQ
1/2×VDDQ
+18m
1/2×VDDQ
+40m
kΩ
IREF=-5mA to 5mA
V
Ta=0℃ to 105℃
IREF=-10mA to 10mA
V
Ta=0℃ to 105℃
VCC=5V, VDDQ=2.5V
Output Voltage 3 VREF3
1/2×VDDQ
-25m
1/2×VDDQ
1/2×VDDQ
+25m
VTT_IN=2.5V
V
IREF=-5mA to 5mA
Ta=0℃ to 105℃
VCC=5V, VDDQ=2.5V
Output Voltage 4 VREF4
1/2×VDDQ
-40m
1/2×VDDQ
1/2×VDDQ
+40m
VTT_IN=2.5V
V
IREF=-10mA to 10mA
Ta=0℃ to 105℃
[UVLO]
UVLO OFF Voltage VUVLO 2.40 2.55 2.70 V VCC : sweep up
Hysteresis Voltage
⊿VUVLO
100 160 220 mV VCC : sweep down
REV. B
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