Termination Regulator. RT2530Q Datasheet

RT2530Q Regulator. Datasheet pdf. Equivalent

RT2530Q Datasheet
Recommendation RT2530Q Datasheet
Part RT2530Q
Description DDR Termination Regulator
Feature RT2530Q; ® RT2530Q DDR Termination Regulator General Description The RT2530Q is a 2A sink/source tracking t.
Manufacture Richtek Technology
Datasheet
Download RT2530Q Datasheet




Richtek Technology RT2530Q
®
RT2530Q
DDR Termination Regulator
General Description
The RT2530Q is a 2A sink/source tracking termination
regulator. It is specifically designed for low-cost and low-
external component count systems. The RT2530Q
possesses a high speed operating amplifier that provides
fast load transient response and only requires 20μF of
ceramic output capacitance. The RT2530Q supports
remote sensing functions and all features required to power
the DDRII/DDRIII VTT bus termination according to the
JEDEC specification. In addition, the RT2530Q includes
integrated sleep-state controls placing VTT in High-Z in
S3 (suspend to RAM) The RT2530Q is available in the
thermal efficient package SOP-8 (Exposed Pad).
Ordering Information
RT2530Q
Package Type
SP : SOP-8 (Exposed Pad-Option 1)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
RT2530QGSP : Product Number
RT2530Q
GSPYMDNN
YMDNN : Date Code
Features
Supports DDRII and DDRIII, Low-Power
Requirement
Source/Sink 2A for DDRII and DDRIII
Input Voltage Range : 3.1V to 3.6V
VLDOIN Voltage Range : 1.2V to 1.8V
Requires Only 20μF Ceramic Output Capacitance
Supports High-Z in S3
Integrated Divider Tracks 1/2 VDDQSNS for Both VTT
and VTTREF
Remote Sensing (VTTSNS)
±20mV Accuracy for VTT
10mA Buffered Reference (Sourcing/Sinking)
(VTTREF)
Built-In Soft-Start
Current Limit
Thermal Shutdown
RoHS Compliant and Halogen Free
Applications
DDRII, DDRIII Memory Termination
SSTL-2, SSTL-18, HSTL Termination
Pin Configurations
(TOP VIEW)
GND
S3
VTTSNS
VTTREF
8
27
3
GND
96
45
VTT
VLDOIN
VIN
VDDQSNS
SOP-8 (Exposed Pad)
Simplified Application Circuit
VLDOIN
3.3V
C1
C2
RT2530Q
VLDOIN
VTTREF
VTTREF
VDDQSNS
C3
VTTSNS
VIN
VTT
VTT
C4
GND S3 S3
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS2530Q-00 April 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1



Richtek Technology RT2530Q
RT2530Q
Functional Pin Description
Pin No.
Pin Name
Pin Function
1, 9 (Exposed Pad) GND
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
2 S3
Active Low Suspend to RAM Mode Control Input. In S3 state, VTT is turned
off and left High-Z, VTTREF is active.
3
VTTSNS
VTT Voltage Sense Input. Connect to plus terminal of the output capacitor.
4
VTTREF
Buffered Output. The reference output voltage equals to VDDQSNS / 2.
5 VDDQSNS VLDOIN Sense Input.
6 VIN
Supply Voltage Input for Control Circuit.
7
VLDOIN
Power Input for VTT Output Stage.
8 VTT
Power Output of the Regulation. The output voltage equals to VDDQSNS / 2.
Function Block Diagram
VDDQSNS
GND
VIN
S3
+ Half DDQ
+
-
-
2.32V/
2.2V
+
-
VIN OK
ENVTT
+
-
(10%)
+
-
+
-
(10%)
VTTSNS
ENREF
ENVTT
PGOOD
State
Normal
Standby
Table 1. S3 Control Table
S3 VTT
High
0.75V
Low High-Z
VTTREF
0.75V
0.75V
VLDOIN
VTTREF
VTT
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS2530Q-00 April 2016



Richtek Technology RT2530Q
Operation
Shutdown Mode
The shutdown mode will happen when the S3 input voltage
is under the logic threshold. The VTT pin will be high
impedance and VTTREF will remain active under shutdown
mode.
VIN OK and Thermal Shutdown
The regulator will detect VIN voltage and junction
temperature. When VIN is lower than the VIN OK threshold
or the junction temperature is over the thermal shutdown
threshold, both the VTT and VTTREF will be discharged
to GND.
RT2530Q
VTTREF Buffer
The buffer senses the input voltage from VDDQSNS and
provides an internal reference voltage of VDDQSNS/2 for
VTT regulator.
VTT Regulator
The VTT output is capable of sinking and sourcing current
while sensing from the VTTSNS pin to regulate the output
precisely to VTTREF.
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS2530Q-00 April 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3







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