DDR Termination Regulator
TJ2997
PIN CONFIGURATION
GND 1
EN 2
8 VTT
GND 1
EN 2
8 VTT
7 PVIN
6 AVIN
5 VDDQ
7 PVIN
6 AVIN
5 VDDQ
Exposed
Thermal
PAD
VSENSE 3
VREF 4
VSENSE 3
VREF 4
SOP8
SOP8-PP
PIN DESCRIPTION
Pin No.
Pin Name
Pin Function
1
2
3
4
5
6
7
8
GND
EN
Ground
Enable
Feedback Pin for Regulating VTT
VSENSE
VREF
VDDQ
AVIN
Buffered Internal Reference Voltage of VDDQ/2
Input for Internal Reference Equal to VDDQ/2
Analog Bias Input Pin
PVIN
Power Input Pin
VTT
Output Voltage for Connection to Termination Resistors
Exposed Thermal PAD
Exposed Thermal Connection. Connect to Ground. (SOP8-PP Only)
TYPICAL APPLICATION
VEN
VDDQ = 1.8V
VAVIN = 2.5V
EN
VREF
VREF = 0.9V
+
0.1uF
VDDQ
AVIN
PVIN
VSENSE
VTT
VTT = 0.9V
220uF
GND
+
+
47uF
Apr, 2011 - R1.0.1
2/13
HTC
HTC [ HTC KOREA TAEJIN TECHNOLOGY CO. ]
