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Termination Regulators for DDR-SDRAMs

ROHM's termination linear power supplies were designed for high-speed data transfer between DDR-SDRAM and MCH. Features include superior response characteristics, high precision reference voltage, and variable termination voltage between 0.75V and 1.25V (BD3537F : 0.60V-1.60V). In addition, sufficient drive current is ensured, resulting in high quality data transfer with no waveform degradation. 

RoHM'SHigh Performance Regulators for PCs

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Specifications Part No. Package Features
0.75V-1.25V Variable / ±3.0A Termination Output, 0.75V-1.25V Variable / ±20mA Reference Output Type
BD3532F

SOP8
0.75V-1.25V Variable / ±1.5A Termination Output, 0.75V-1.25V Variable / ±10mA Reference Output Type
BD3531F

SOP8
0.75V-1.25V Variable / ±1.0A Termination Output, 0.75V-1.25V Variable / ±20mA Reference Output Type
BD3533F

SOP8
0.75V-1.25V Variable / ±1.0A Termination Output, 0.75V-1.25V Variable / ±20mA Reference Output Type
BD3533FVM

MSOP8
0.75V-1.25V Variable / ±1.0A Termination Output, 0.75V-1.25V Variable / ±20mA Reference Output Type
BD3533HFN

HSON8
0.60V-1.60V Variable / ±1.8A Termination Output Type
BD3537F

SOP8
0.75V-1.25V Variable / ±1.0A Termination Output, 0.75V-1.25V Variable / ±20mA Reference Output Type
BD3538F

SOP8
0.75V-1.25V Variable / ±1.0A Termination Output, 0.75V-1.25V Variable / ±20mA Reference Output Type
BD3538FVM

MSOP8
0.75V-1.25V Variable / ±1.0A Termination Output, 0.75V-1.25V Variable / ±20mA Reference Output Type
BD3538HFN

HSON8
0.75V-0.9V Variable / ±1.0A Termination Output, 0.75V-0.9V Variable / ±20mA Reference Output Type
BD3539FVM

MSOP8
0.75V-0.9V Variable / ±1.0A Termination Output, 0.75V-0.9V Variable / ±20mA Reference Output Type
BD3539NUX

VSON008X2030
0.75V-1.25V Variable / ±1.0A Termination Output Type
BD35390FJ

SOP-J8


Block Diagram

Board
Expanded
  

Features

High-speed load response

ROHM power supplies for DDR-SDRAM minimize output voltage fluctuations by utilizing an original circuit design featuring fast load response characteristics. The result is high accuracy termination voltage for stable, reliable, high-speed data transfer between the MCH and DDR-SDRAM.

  
Expanded
Easy to use-no input sequence required
Ceramic capacitor compatibility (All models except BD3532F, BD3531F)
Current surges mitigated with soft start function (All models except BD3531F)

Product Inquiries



Linear Regulator

Part No. Input
Voltage
(V)		 Output
current
(A)		 VTT
Output
current
(A)		 VREF
Output
current
(mA)		 Output
Voltage
(V)		 Voltage
precision		 NRCS
(soft start)		 Thermal
shut down		 UVLO Over
current
protection		 Timer
Latch
type
short
circuit
protection		 Package RoHS Distribution
Inventory
Reset
BD3532F 4.3 to 5.5 - ±3.0 ±20 0.75 to 1.25 VREF±30mV Yes Recovery Yes None None SOP8 Yes
BD3531F 4.5 to 5.5 - ±1.5 ±10 0.75 to 1.25 VREF±30mV None Recovery Yes None None SOP8 Yes
BD3533F 2.7 to 5.5 - ±1.0 ±20 0.75 to 1.25 VREF±30mV Yes Recovery Yes None None SOP8 Yes
BD3533FVM 2.7 to 5.5 - ±1.0 ±20 0.75 to 1.25 VREF±30mV Yes Recovery Yes None None MSOP8 Yes
BD3533HFN 2.7 to 5.5 - ±1.0 ±20 0.75 to 1.25 VREF±30mV Yes Recovery Yes None None HSON8 Yes
BD3537F 4.75 to 5.25 - ±1.8 - 0.6 to 1.6 VREF±30mV Yes Recovery Yes None None SOP8 Yes
BD3538F 2.7 to 5.5 - ±1.0 ±20 0.75 to 1.25 VREF±30mV Yes Recovery Yes None None SOP8 Yes
BD3538FVM 2.7 to 5.5 - ±1.0 ±20 0.75 to 1.25 VREF±30mV Yes Recovery Yes None None MSOP8 Yes
BD3538HFN 2.7 to 5.5 - ±1.0 ±20 0.75 to 1.25 VREF±30mV Yes Recovery Yes None None HSON8 Yes
BD3539FVM 2.7 to 5.5 - ±1.0 ±10 0.75 to 0.9 1/2VDD±15mV Yes Recovery Yes None None MSOP8 Yes
BD3539NUX 2.7 to 5.5 - ±1.0 ±10 0.75 to 0.9 1/2VDD±15mV Yes Recovery Yes None None VSON008X2030 Yes
BD35390FJ 2.7 to 5.5 - ±1.0 - 0.75 to 1.25 1/2VDD±15mV Yes Recovery Yes None None SOP-J8 Yes

 

High Performance
Regulators for PCs

2010.12.23

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