DataSheet8.cn


PDF ( 数据手册 , 数据表 ) OZ812

零件编号 OZ812
描述 Integrated Power Supply Controller
制造商 O2Micro International
LOGO O2Micro International LOGO 


1 Page

No Preview Available !

OZ812 数据手册, 描述, 功能
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












页数 7 页
下载[ OZ812.PDF 数据手册 ]


分享链接

Link :

推荐数据表

零件编号描述制造商
OZ811Ultra High Efficiency DC-DC ControllerO2Micro International
O2Micro International
OZ812Integrated Power Supply ControllerO2Micro International
O2Micro International
OZ813Ultra High Efficiency Dual DC-DC ControllerO2Micro International
O2Micro International

零件编号描述制造商
STK15C88256-Kbit (32 K x 8) PowerStore nvSRAMCypress Semiconductor
Cypress Semiconductor
NJM4556DUAL HIGH CURRENT OPERATIONAL AMPLIFIERNew Japan Radio
New Japan Radio
EL1118-G5 PIN LONG CREEPAGE SOP PHOTOTRANSISTOR PHOTOCOUPLEREverlight
Everlight


DataSheet8.cn    |   2020   |  联系我们   |   搜索  |  Simemap