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PDF RT9089A Data sheet ( Hoja de datos )
| Número de pieza | RT9089A | |
| Descripción | DDR Termination Regulator | |
| Fabricantes | Richtek Technology | |
| Logotipo |  |
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®
RT9089A
DDR Termination Regulator
General Description
The RT9089A is a sink/source tracking termination
regulator. It is specifically designed for low-cost and low-
external component count systems. The RT9089A
possesses a high speed operating amplifier that provides
fast load transient response and only requires a minimum
10μF ceramic output capacitor. The RT9089A supports
remote sensing functions and all features required to power
the DDRI / DDRII / DDRIII and Low Power DDRIII / DDRIV
VTT bus termination according to the JEDEC
specification.
The RT9089A is available in the thermal efficient package,
WDFN-10L 2x2.
Marking Information
2N : Product Code
2NW
W : Date Code
Pin Configurations
(TOP VIEW)
VDDQSNS
VIN
VOUT
PGND
SENSE
1
2
3
4
5
10 VCNTL
9 S5
8 GND
11
7 S3
6 REFOUT
WDFN-10L 2x2
Features
VIN Input Voltage Range : 1.1V to 3.5V
VCNTL Input Voltage Range : 2.9V to 5.5V
Support Ceramic Capacitors
10mA Source/Sink Reference Output
Meet DDRI, DDRII JEDEC Spec
Support DDRIII, Low Power DDRIII/DDRIV VTT
Applications
Soft-Start Function
UVLO and OCP Protection
Thermal Shutdown
Applications
Notebook/Desktop/Server
Telecom/Datacom, GSM Base Station, LCD-TV/PDP-
TV, Copier/Printer, Set-Top Box
Ordering Information
RT9089A
Package Type
QW : WDFN-10L 2x2 (W-Type)
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.
Simplified Application Circuit
VIN
REFOUT
C3
C3
S3
RT9089A
VIN VCNTL
VDDQSNS
REFOUT
S5
VOUT
SENSE
S3 PGND
GND
VCNTL
C4
S5
VOUT
C5
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS9089A-02 April 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
RT9089A
Parameter
Symbol
Test Conditions
Min Typ Max Unit
VOUT Source Current Limit
VOUT Sink Current Limit
VOUT Discharge
Resistance
ILIM_VOUT_SR
ILIM_VOUT_SK
RDISCHARGE
VOUT in PGOOD Window
VOUT in PGOOD Window
VVDDQSNS = 0V, VOUT = 0.3V,
VS3 = 0V
2
2
--
-- -- A
-- -- A
18 25
VDDQSNS and REFOUT
VDDQSNS Input Current
IVDDQSNS
VVDDQSNS = 1.8V
-- 30 -- A
VDDQSNS Voltage Range VVDDQSNS
0.5 -- 1.8 V
10mA < IREFOUT < 10mA,
VVDDQSNS = 1.5V
15 --
15
REFOUT Voltage Tolerance
to VVDDQSNS
VTOL_REFOUT
10mA < IREFOUT < 10mA,
VVDDQSNS = 1.35V
15 --
15 mV
REFOUT Source Current
Limit
ILIM_REFOUT_SR
10mA < IREFOUT < 10mA,
VVDDQSNS = 1.2V
VREFOUT = 0V
12 --
10 40
12
-- mA
REFOUT Sink Current Limit ILIM_REFOUT_SK VREFOUT = VDDQSNS / 2 + 1V 10
40
-- mA
UVLO/S3/S5
UVLO Threshold
VUVLO_VCNTL
Rising
Hysteresis
2.5 2.7 2.85 V
-- 120 -- mV
S3/S5 Input
Voltage
Logic-High VIN_H
Logic-Low VIN_L
1.7 --
--
V
-- -- 0.3
Thermal Shutdown
Thermal Shutdown
Threshold
TSD
Shutdown Temperature
Hysteresis
--
--
160
15
--
--
°C
Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in
the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may
affect device reliability.
Note 2. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. θJC is
measured at the exposed pad of the package.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS9089A-02 April 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet RT9089A.PDF ] | |
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