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BD3538F-TR Arkusz danych(PDF) 1 Page - Rohm |
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1 / 20 page ○Product structure:Silicon monolithic integrated circuit ○This product has no designed protection against radioactive rays . 1/16 © 2015 ROHM Co., Ltd. All rights reserved. 02.Nov.2015 Rev.001 TSZ22111・14・001 www.rohm.com TSZ02201-0J2J0A900980-1-2 Termination Regulators for DDR-SDRAMs BD3538F BD3538HFN General Description BD3538F/HFN 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. 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) Applications Power supply for DDR I / II - SDRAM Key Specifications Termination Input Voltage Range: 1.0V to 5.5V VCC Input Voltage Range: 2.7V to 5.5V VDDQ Reference Voltage Range: 1.0V to 2.75V Output Voltage: 1/2 x VVDDQ V(Typ) Output Current: 1.0A (Max) High side FET O-Resistance: 0.4 Ω(Typ) Low side FET ON-Resistance: 0.4 Ω(Typ) Standby Current: 0.5mA (Typ) Operating Temperature Range: -40°C to +105°C Packages W(Typ) x D(Typ) x H(Max) Typical Application Circuit, Block Diagram SOP8 5.00mm x 6.20mm x 1.71mm HSON8 2.90mm x 3.00mm x 0.60mm VCC VCC VDDQ VDDQ VTT_IN VCC VCC VCC SOFT UVLO TSD Reference Block Thermal Protection Enable EN GND VREF VTTS VDDQ ½ x VTT VTT VTT_IN UVLO TSD EN UVLO TSD EN UVLO VCC TSD EN UVLO EN 1 2 4 3 8 7 5 6 Datasheet Datasheet |
Podobny numer części - BD3538F-TR |
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Podobny opis - BD3538F-TR |
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