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Termination Regulator for DDR-SDRAMs - BD3538F (New)

BD3538F 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 of up to 1A and has a power supply bias requirements of 3.3V to 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, BD3538 has a reference power supply output (VREF) for DDR-SDRAM or a memory controller. 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.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Status
Package
Unit Quantity
Minimum Package Quantity
Packing Type
RoHS
BD3538F-E2 Active SOP8 2500 2500 Taping Yes
 
Specifications:
Grade Standard
ch 1
Vin(Min.)[V] 2.7
Vin(Max.)[V] 5.5
Vin 2ch[V] 1.0 to 5.5
Iout(Max.)[A] 1.0
Circuit Current[mA] 2.0
Thermal Shut-down Yes
Under Voltage Lock Out Yes
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 105
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)
 
ROHM Semiconductor reserves the right to change the specifications at any time.
 
Technical Data
Application Note

Thermal Resistance

Application Note

Basics of Linear Regulators

Application Note

Linear Regulator Specifications

Application Note

Reverse Voltage Protection

Application Note

Simple Test Method for Estimating the Stability of Linear Regulators