ON5402,518 NXP Semiconductors, ON5402,518 Datasheet - Page 2

• Manufacturer Part Number: ON5402,518
• Description: MOSFET RF 8SOIC
• Manufacturer: NXP Semiconductors

Specifications of ON5402,518

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 934059339518

voltage (DDR reference bus voltage) that is one-half that of the RAM
DESCRIPTION
The NE57811 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 NE57811 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 NE57811 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 NE57811 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 Apr 02
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
Shutdown pin that may be used to put the device into low power
mode
Compatible with DDR-I (V
SDRAM systems
Advanced DDR memory termination power
with shutdown
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
NE57811
POWER
SHTDWN
(optional)
SL01690
NE57811
Product data