AIC1384
DDR Termination Regulator
FEATURES
Source and Sink Current Capability
Suspend To RAM Functionality
Support DDRⅠ (1.25V
TT
) and DDRⅡ (0.9V
TT
)
Requirements
Low Output Voltage Offset,
±20mV
High Accuracy Output Voltage at Full-Load
Low External Component Count
No external resistor required
Current Limit protection
Thermal Protection
SOP-8 and SOP-8 Exposed Pad (Heat Sink)
Package
DESCRIPTION
The AIC1384 linear regulator is designed to
deliver 1.5A continuous current and up to 3A
peak transient currents for termination of DDR-
SRAM. The AIC1384 contains a high-speed
operational amplifier to supply superior load
transient response. It also includes a V
SENSE
to
provide excellent load regulation and V
REF
output as a reference for the chipset and
DIMMs. The AIC1384 supply accurate V
TT
and
V
REF
without external resistors that save PCB
areas.
The AIC1384 also features an active low
shutdown pin that provides Suspend To RAM
(STR) functionality. The V
TT
will remain high
impedance when in shutdown, but V
REF
will
keep active. The advantage of power saving
can be obtained through low 150µA (DDR
Ⅰ
)
quiescent current.
Built in current limiting in source and sink mode,
with thermal shutdown provide maximal
protection to the AIC1384 against fault
conditions.
APPLICATIONS
Mother board
Graphic cards
DDR
Ⅰ
and DDR
Ⅱ
termination voltage
TYPICAL APPLICATION CIRCUIT
VTT=1.25V
Cout
22uF
VIN=2.5V
Cin
47uF
1
SD
2
3
VREF=1.25V
10nF
4
GND
SD
VSENSE
VREF
VTT
PVIN
AVIN
VDDQ
8
7
6
5
VDDQ=2.5V
AIC1384
Analog Integrations Corporation
Si-Soft Research Center
3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
DS-1384G-01 073108
1
AIC [ ANALOG INTERGRATIONS CORPORATION ]
