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MAX8794ETV+

更新时间： 2024-11-11 11:14:31
品牌 Logo 应用领域
美信 - MAXIM 稳压器双倍数据速率
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13页 253K
描述
Low-Voltage DDR Linear Regulator

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19-0584; Rev 2; 3/10  
Low-Voltage DDR Linear Regulator  
MAX8794  
General Description  
Features  
The MAX8794 DDR linear regulator sources and sinks up  
to 3A peak (typ) using internal n-channel MOSFETs. This  
linear regulator delivers an accurate 0.5V to 1.5V output  
o Internal Power MOSFETs with Current Limit (3A typ)  
o Fast Load-Transient Response  
o External Reference Input with Reference  
from a low-voltage power input (V = 1.1V to 3.6V). The  
IN  
MAX8794 uses a separate 3.3V bias supply to power the  
control circuitry and drive the internal n-channel MOSFETs.  
Output Buffer  
o 1.1V to 3.6V Power Input  
The MAX8794 provides current and thermal limits to pre-  
vent damage to the linear regulator. Additionally, the  
MAX8794 generates a power-good (PGOOD) signal to  
indicate that the output is in regulation. During startup,  
PGOOD remains low until the output is in regulation for 2ms  
(typ). The internal soft-start limits the input surge current.  
o
15mV (max) Load-Regulation Error  
o Thermal-Fault Protection  
o Shutdown Input  
o Power-Good Window Comparator with 2ms (typ)  
Delay  
The MAX8794 powers the active-DDR termination bus  
that requires a tracking input reference. The MAX8794  
can also be used in low-power chipsets and graphics  
processor cores that require dynamically adjustable  
output voltages. The MAX8794 is available in a 10-pin,  
3mm x 3mm, TDFN package.  
o Small, Low-Profile, 10-Pin, 3mm x 3mm TDFN  
Package  
o Ceramic or Polymer Output Capacitors  
Ordering Information  
PIN-  
PACKAGE  
TOP  
MARK  
PART  
TEMP RANGE  
Applications  
Notebook/Desktop Computers  
10 TDFN-EP*  
(3mm x 3mm)  
MAX8794ETB+  
-40°C to +85°C  
ASW  
ASW  
DDR Memory Termination  
Active Termination Buses  
10 TDFN-EP*  
(3mm x 3mm)  
MAX8794ETB/V+ -40°C to +85°C  
Graphics Processor Core Supplies  
Chipset/RAM Supplies as Low as 0.5V  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
/V Denotes an automotive qualified part.  
*EP = Exposed pad.  
Pin Configuration  
Typical Operating Circuit  
V
IN  
(1.1V TO 3.6V)  
V
= V  
TT  
OUT  
IN  
OUT  
TOP VIEW  
OUTS  
+
1
2
3
4
5
10  
9
REFOUT  
IN  
V
BIAS  
MAX8794  
V
CC  
OUT  
(2.7V TO 3.6V)  
V
PGND  
AGND  
CC  
8
AGND  
REFIN  
PGND  
SHDN  
OUTS  
MAX8794  
7
SHDN  
EP*  
6
PGOOD  
PGOOD  
REFIN  
V
DDQ  
TDFN  
3mm x 3mm  
(2.5V OR 1.8V)  
V
= V  
TTR  
REFOUT  
REFOUT  
*EXPOSED PAD.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  
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