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Спецификация NCP5203MNR2 изготовлена «ON» и имеет функцию, называемую «2-in-1 DDR Power Controller». |
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Детали детали
Номер произв | NCP5203MNR2 |
Описание | 2-in-1 DDR Power Controller |
Производители | ON |
логотип |
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NCP5203
2−in−1 DDR Power
Controller
The NCP5203 2−in−1 DDR Power Controller is a complete power
solution for an ACPI compliant high current DDR memory system.
This IC combines the efficiency of a PWM controller for the VDDQ
supply with the simplicity of linear regulator for the VTT
termination voltage. The NCP5203 contains a synchronous PWM
buck controller for driving two external NFETs to form the DDR
memory supply voltage (VDDQ). The $2.0 A user adjustable VTT
terminator regulator has short circuit protection. An internal power
good function monitors both the VDDQ and VTT outputs and signals
if a fault occurs. Protective features include soft−start, undervoltage
monitoring of 5VDUAL, over protection current (OCP), and thermal
shutdown. The IC is packaged in 18−lead QFN.
Features
• Supports DDR I and DDR II
• Incorporates VDDQ, VTT Regulators
• Operates from Single 5 V Supply
• VTT Regulator includes Integrated Power FETs Sourcing/Sinking
up to 2.0 A
• All External Power MOSFETs are N−Channel
• Adjustable VDDQ
• Adjustable VTT
• Fixed Switching Frequency of 300 kHz for VDDQ in S0
• Fixed Switching Frequency of 600 kHz for VDDQ in S3
• Soft−Start Protection for VDDQ
• Undervoltage Monitor of 5VDUAL
• Short−Circuit Protection for VDDQ and VTT
• Thermal Shutdown
• Housed in QFN−18
• Pb−Free Package is Available*
Typical Applications
• DDR Memory Supply and Termination Voltage
• Active Termination Busses (SSTL−2, SSTL−3)
http://onsemi.com
MARKING
DIAGRAM
18 1
1
18−LEAD QFN, 5 x 6 mm
MN SUFFIX
CASE 505
NCP5203
AWLYYWW
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
PIN CONNECTIONS
VDDQEN
VTTEN
PGOOD
REFSNS
FBVTT
AGND
SS
COMP
FBDDQ
1
2
3
4
5
6
7
8
9
18 VDDQ
17 VTT
16 PGND
15 BST
14 BGDDQ
13 TGDDQ
12 5VDUAL
11 SWDDQ
10 OCDDQ
ORDERING INFORMATION
Device
Package
Shipping†
NCP5203MNR2
NCP5203MNR2G
QFN 2500 Tape & Reel
QFN 2500 Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques Reference
Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2005
January, 2005 − Rev. 1
1
Publication Order Number:
NCP5203/D
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VTTEN
VDDQEN
VTTEN
VDDQEN
5VDUAL
PGOOD
CSS
PGOOD
SS
1.25 V,
2.0 A Peak
VTT
COUT2
VTT
FBVTT
R3
REFSNS
AGND
R4
NCP5203
CL1
RL1
OCDDQ
BST
5VDUAL
5VDUAL
NCP5203
TGDDQ
M1
SWDDQ
BGDDQ
PGND
M2
VDDQ
L 2.5V, 15A
COUT1
COMP CZ1 CP1
RZ1
FBDDQ
VDDQ
CZ2
R1
RZ2
R2
Figure 1. Typical Application Diagram
http://onsemi.com
2
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NCP5203
Figure 2. Detailed Block Diagram
http://onsemi.com
3
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Номер в каталоге | Описание | Производители |
NCP5203MNR2 | 2-in-1 DDR Power Controller | ON |
NCP5203MNR2G | 2-in-1 DDR Power Controller | ON |
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