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Termination Regulator for DDR-SDRAMs - BD3538HFN

BD3538HFN 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
BD3538HFN-TR Active HSON8 3000 3000 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)
 
 
Technical Data
Application Note

Thermal Resistance

Application Note

Basics of Linear Regulators

Application Note

Linear Regulator Specifications

Application Note

BAxxCC0 Series Circuit Using a Ceramic Output Capacitor

Application Note

Simple Test Method for Estimating the Stability of Linear Regulators

Application Note

Power Source ON/OFF Characteristics for Linear Regulator

Application Note

Reverse Voltage Protection

Application Note

Thermal Calculation for Linear Regulator

Application Note

Measurement Method for Phase Margin with Frequency Response Analyzer (FRA)