Termination Regulator for DDR-SDRAMs - BD35395FJ-M

BD35395FJ-M is a termination regulator compatible with JEDEC DDR1/2/3/3L-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 or 5.0 volts 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.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Unit Quantity
Minimum Package Quantity
Packing Type
BD35395FJ-ME2 Active SOP-J8 2500 2500 Taping Yes
Grade Standard
ch 1
Vin(Min.)[V] 2.7
Vin(Max.)[V] 5.5
Iout(Max.)[A] 1.0
Circuit Current[mA] 0.5
Thermal Shut-down Yes
Over Current Protection Yes
Under Voltage Lock Out Yes
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 105
  • · Incorporates a push-pull power supply for termination (VTT).
    · Incorporates an enabler.
    · Incorporates an under voltage lockout (UVLO).
    · Employs SOP-J8 package : 4.9×6.0×1.65(mm).
    · Incorporates a thermal shutdown protector (TSD).
    · Operates with input voltage from 2.7 to 5.5 volts.
    · Compatible with Dual Channel
    · Incorporates PGOOD function.
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Technical Data
BD35395FJ-M PCB Layout

The PCB layout is as important as the circuit design. Major problems caused by an improper layout include inferior regulation and a lack of stability. Employing a proper layout makes it possible to prevent such problems.

Thermal Resistance

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Basics of Linear Regulators

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Reverse Voltage Protection

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Simple Test Method for Estimating the Stability of Linear Regulators

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Thermal Calculation for Linear Regulator

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Power Source ON/OFF Characteristics for Linear Regulator

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BAxxCC0 Series Circuit Using a Ceramic Output Capacitor

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Connecting LDOs in Parallel

Provides some hints on how to connect LDOs in parallel.