BD3537F_08 Datasheet, PDF (1/11 Pages) Rohm – Termination Regulators for DDR-SDRAMs

TECHNICAL NOTE
High-performance Regulator IC Series for PCs
Termination Regulators
for DDR-SDRAMs
BD3537F
Description
BD3537F is a termination regulator compatible with JEDEC DDR-SDRAM, which functions as a linear power supply
incorporating an N-channel MOSFET and provides a sink/source current capability up to 1.8A respectively. A built-in
high-speed OP-AMP specially designed offers an excellent transient response. Requires 5.0 volts as a bias power supply
to drive the N-channel MOSFET. For BD3537F, ceramic capacitor can be used as output capacitor. Thus, the BD3537F
is designed to enable significant package profile downsizing as the total regulator part.
Features
1) Incorporates a push-pull power supply for termination (VTT)
2) Incorporates an enabler
3) Incorporates an undervoltage lockout (UVLO)
4) Employs SOP8 package
5) Incorporates a thermal shutdown protector (TSD)
6) Compatible with Dual Channel (DDR-II)
7) Operates with input voltage from 4.75 to 5.25 volts
8) Incorporates soft start function
Use
Power supply for DDR I/II - SDRAM
Oct. 2008