NE57810S Philipss, NE57810S Datasheet - Page 2

• Manufacturer Part Number: NE57810S
• Description: Advanced DDR memory termination power with external reference in
• Manufacturer: Philipss

voltage (DDR reference bus voltage) that is one-half that of the RAM
DESCRIPTION
The NE57810 is designed to provide power for termination of a
Double Data Rate (DDR) SDRAM memory bus. It significantly
reduces parts count, board space, and overall system cost
compared to previous solutions.
The NE57810 DDR termination regulator maintains an output
supply voltage. It is capable of providing up to 3.5 A for sustained
periods. Overcurrent limiting protects the NE57810 from inrush
currents at start-up, and overtemperature shutdown protects the
device in extreme temperature situations.
The SPAK-5 (SOT756) package is thermally robust for flexibility of
thermal design. Because the NE57810 is a linear regulator, no
external inductors or switching FETs are necessary. Fast response
to load changes reduces the need for output capacitors.
FEATURES
SIMPLIFIED SYSTEM DIAGRAM
Philips Semiconductors
2003 Sep 12
Fast transient response time
Overtemperature protection
Overcurrent protection
Commercial (0 C to +70 C) temperature range
Reduced need for external components
(switching FETs, inductors, decoupling capacitors)
Internal divider maintains termination voltage at
supply voltage
Reference out for other memory and control components
Optional external voltage reference in for flexible application
Compatible with DDR-I (V
SDRAM systems
Advanced DDR memory termination power
with external reference in
CONTROLLER
MEMORY
DD
= 2.5 V) or DDR-II (V
20
R
(typical)
S
1
DIMM0
/
Figure 1. Simplified system diagram.
2
DD
memory
= 1.8 V)
Control & Address
Data
2
DIMM1
APPLICATIONS
Desktop microcomputer systems
Workstations
Servers
Game machines
Set top boxes
Embedded systems
Digital video recorders
27
R
(typical)
T
0.1 F
RefOut
V
100 F
TT
TERMINATION
NE57810
POWER
(optional)
ExtRefIn
SL01669
NE57810
Product data