Termination Regulator for DDR-SDRAMs - BD3531F | ROHM Semiconductor - ROHM Co., Ltd. - global
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Termination Regulator for DDR-SDRAMs - BD3531F
BD3531F is a termination regulator that complies with JEDEC requirements for DDR-SDRAM. This linear power supply uses a built-in N-channel MOSFET and high-speed OP-AMPS specially designed to provide excellent transient response. It has a sink/source current capability up to 1.5A and has a power supply bias requirement of 5.0V for driving the N-channel MOSFET. By employing an independent reference voltage input (VDDQ) and a feedback pin (VTTS), this termination regulator provides excellent output voltage accuracy and load regulation as required by JEDEC standards. Additionally, BD3531F has a reference power supply output (VREF) for DDR-SDRAM or for memory controllers. Unlike the VTT output that goes to "Hi-Z" state, the VREF output is kept unchanged when EN input is changed to "Low", making this IC suitable for DDR-SDRAM under "Self Refresh" state.
Specifications:
Grade
Standard
ch
1
Vin(Min.)[V]
4.5
Vin(Max.)[V]
5.5
Vin 2ch[V]
1.0 to 5.5
Iout(Max.)[A]
1.5
Circuit Current[mA]
2.0
Thermal Shut-down
Yes
Under Voltage Lock Out
Yes
Operating Temperature (Min.)[°C]
-10
Operating Temperature (Max.)[°C]
100
Features:
- Incorporates a Push-Pull Power Supply for Termination (VTT)
- Incorporates a Reference Voltage Circuit (VREF)
- Incorporates an Enabler
- Incorporates an Undervoltage Lockout (UVLO)
- Incorporates a Thermal Shutdown Protector (TSD)
- Compatible with Dual Channel (DDR-II)
