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OZ812 데이터시트 PDF




O2Micro International에서 제조한 전자 부품 OZ812은 전자 산업 및 응용 분야에서
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부품번호 OZ812 기능
기능 Integrated Power Supply Controller
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OZ812 데이터시트, 핀배열, 회로
OZ812
DDR, DDR2 and DDR3 Integrated Power Supply Controller
FEATURES
DC-DC SMPS controller with integrated
drivers for VDDQ
Integrated Linear Regulator with 2A source
and sink capability for VTT.
High Efficiency up to 94%
High light load efficiency; >85% at 100mA
VDDQ accuracy ±1%
Input voltage from 3V to 30V
Output voltage
o Preset values at 2.5V or 1.8V or
o adjustable from 0.5V to 2.75V
Output current - up to 15A
Power Good signal
ON/SKIP signal
Soft-Start and Soft-stop
Voltage Feed-Forward Compensation
Constant ripple-current control allows
optimum inductor size
Dynamic voltage change support
Output Protection:
o Latched Over Voltage Protection
o Latched Under Voltage Protection
o Valley type Over Current
Protection
Input Protection:
o Under Voltage Lock Out on VDDA
o Under Voltage Lock Out on VIN
APPLICATIONS
Power Supplies for DDR, DDR2 and DDR3 memory
ORDERING INFORMATION
Part Number Temp Range
Package
OZ812LN
0oC to 85oC
QFN24 (4x4mm)
Lead-Free
GENERAL DESCRIPTION
OZ812 is a DC/DC controller specially developed to design
power supplies for DDR, DDR2 and DDR3 memories. OZ812
steps down the high battery voltage to low output voltages in
the range of 0.5V to 2.75V and also provides the memory
reference VTTREF and termination voltage VTT that
accurately tracks VDDQ/2. It is compliant with the DDR,
DDR2 and DDR3 specifications.
Voltage Feed-Forward compensation assures high rejection of
input voltage transients, typically occurring when the AC
adapter is plugged in or removed.
Over Voltage Protection (OVP) acts when the output voltage
exceeds the set voltage by more than 125mV. This protection
condition is latched and initiates a ramp down of the output
voltage.
Under Voltage Protection (UVP) acts when the output voltage
falls below the set voltage by more than 133mV. This
protection condition is latched and initiates a ramp down of
the output voltage.
After an OVP or UVP event, the ON/SKIP pin should be
toggled or VDDA/VIN cycled to restart the circuit.
The DC/DC controller output is protected against overload by
a valley current type, cycle-by-cycle Over Current Protection
(OCP) circuit.
The Under Voltage Lock Out circuit monitors both, VDDA and
VIN and lets the controller operate only if VDDA > 4.2V and
VIN > 2.5V.
The Power Good signal is high as long as the output voltage
is within +125mV/-133mV of the set voltage. At startup the
output voltage ramps up in a controlled manner with a typical
slew rate of 1V/ms (soft start) and at shutdown the output
voltage is ramped down in a controlled manner with the same
slew rate (soft stop).
VTTREF is able to source and sink 20mA tracking
VDDQ/2±1%. VTT tracks VREF within ±40mV and is able to
source and sink 2A.
SIMPLIFIED APPLICATION DIAGRAM
PIN DIAGRAM
www.DataSheet4U.com
07/31/08
OZ812-SF-v1.0
Copyright © 2005-2008 by O2Micro
All Rights Reserved
Patent # 6,844,710; 7,098,642; 6,965,221; 6,472,897; 6,720,800; 7,319,346; 7,202,650 and others pending
Page 1




OZ812 pdf, 반도체, 판매, 대치품
BILL OF MATERIALS
Item
1
2
3
4
5
Qty
1
1
2
1
1
63
71
81
93
10 1
11 1
12 1
13 1
14 1
15 1
16 1
17 1
18 2
19 1
20 1
21 1
22 1
23 1
24 1
Reference
CIN
COUT
C10, C11
C3
C6
C1, C5, C13
C2
C7
C4, C9, C12
C8
R0
R1
R2
R3
R4
R5
R6
R8, R9
D1
D2
M1
M2
L1
U1
Value
2x10u/25V
2x220uF/6.3V
47uF/6V
0.1uF/10V
0.22uF/10V
1uF/10V
10nF/25V
3.3nF/25V
1nF/6V
22pF
0
22
1k
124k 1%
150k 1%
1k9
100k 1%
51
NONE
NONE
NONE
NONE
1u/24A
NONE
OZ812
Vendor
Part Number
TDK
C3225X5R1E106M
Sanyo
6TPD220M
TDK
C3225X5R1E476M
Any Ceramic – X7R or X5R
Any Ceramic – X7R or X5R
TDK
C1608X5R1A105K
Johanson Dielectrics 100R14X105M
Any Ceramic – X7R or X5R
Any Ceramic – X7R or X5R
Any Ceramic – X7R or X5R
Any Ceramic
Any
Any
Any
Any
Any
Any
Any
Any
Vishay
MBR0540
IR 15MQ040N
Vishay
Si7892DP
Vishay
Si7336DP
Vishay
IHLP5050CERZ1R0M01
O2Micro, Inc. OZ812
PCB Footprint
1210
D4D
1210
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
SOD-123
SMA
PowerPAK
PowerPAK
5050
QFN24
COMPONENT SUPPLIERS
Manufacturer
Power MOSFETs
Vishay
Inductors
Vishay
Diode
IR
Vishay
Capacitors
Vishay
Johanson Dielectrics
Sanyo
TDK
Resistors
Vishay
TDK
Contact Information
Phone
Website
1-402-563-6866
www.vishay.com
1-402-563-6866
www.vishay.com
1-303-283-7700
1-402-563-6866
www.ir.com
www.vishay.com
1-847-803-6100
1-818-364-9800
1-619-661-4134
1-800-344-2112
www.vishay.com
www.johansondielectrics.com
www.sanyodevice.com
www.tdk.com
1-402-563-6866
1-800-344-2112
www.vishay.com
www.tdk.com
www.DataSheet4U.com
OZ812-SF-v1.0
Page 4

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OZ812 전자부품, 판매, 대치품
OZ812
IMPORTANT NOTICE
No portion of O2Micro specifications/datasheets or any of its subparts may be reproduced in any form, or by any means,
without prior written permission from O2Micro.
O2Micro and its subsidiaries reserve the right to make changes to their datasheets and/or products or to discontinue any
product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before
placing orders, that information being relied on is current and complete. All products are sold subject to the terms and
conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent
infringement, and limitation of liability.
O2Micro warrants performance of its products to the specifications applicable at the time of sale in accordance with
O2Micro’s standard warranty. Testing and other quality control techniques are utilized to the extent O2Micro deems
necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except
those mandated by government requirements.
Customer acknowledges that O2Micro products are not designed, manufactured or intended for incorporation into any
systems or products intended for use in connection with life support or other hazardous activities or environments in which
the failure of the O2Micro products could lead to death, bodily injury, or property or environmental damage (“High Risk
Activities”). O2Micro hereby disclaims all warranties, and O2Micro will have no liability to Customer or any third party,
relating to the use of O2Micro products in connection with any High Risk Activities.
Any support, assistance, recommendation or information (collectively, “Support”) that O2Micro may provide to you
(including, without limitation, regarding the design, development or debugging of your circuit board or other application) is
provided “AS IS.” O2Micro does not make, and hereby disclaims, any warranties regarding any such Support, including,
without limitation, any warranties of merchantability or fitness for a particular purpose, and any warranty that such Support
will be accurate or error free or that your circuit board or other application will be operational or functional. O2Micro will have
no liability to you under any legal theory in connection with your use of or reliance on such support.
COPYRIGHT © 2005-2008, O2Micro International Limited
www.DataSheet4U.com
OZ812-SF-v1.0
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