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General Description

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 from a low-voltage power input (VIN = 1.1V to 3.6V). The MAX8794 uses a separate 3.3V bias supply to power the control circuitry and drive the internal n-channel MOSFETs.

The MAX8794 provides current and thermal limits to prevent 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.

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.

Features

? Internal Power MOSFETs with Current Limit (3A typ)

? Fast Load-Transient Response

? External Reference Input with Reference Output Buffer

? 1.1V to 3.6V Power Input

? ±15mV (max) Load-Regulation Error

? Thermal-Fault Protection

? Shutdown Input

? Power-Good Window Comparator with 2ms (typ) Delay

? Small, Low-Profile, 10-Pin, 3mm x 3mm TDFN Package

? Ceramic or Polymer Output Capacitors

Applications

?? Notebook/Desktop Computers

?? DDR Memory Termination

?? Active Termination Buses

?? Graphics Processor Core Supplies

?? Chipset/RAM Supplies as Low as 0.5V