MAX1510ETB+T

The MAX1510/MAX17510 DDR linear regulators source and sink up to 3A peak (typ) using internal n-channel MOSFETs. These linear regulators deliver an accurate 0.5V to 1.5V output from a low-voltage power input (V_IN = 1.1V to 3.6V). The MAX1510/MAX17510 use a separate 3.3V bias supply to power the control circuitry and drive the internal n-channel MOSFETs. The MAX1510/MAX17510 provide current and thermal limits to prevent damage to the linear regulator. Additionally, the MAX1510/MAX17510 generate 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 MAX1510/MAX17510 power the active-DDR termination bus that requires a tracking input reference. The devices can also be used in low-power chipsets and graphics processor cores that require dynamically adjustable output voltages. The MAX1510/MAX17510 are available in a 10-pin, 3mm x 3mm thin DFN package. The MAX1510/MAX17510 are low-voltage, low-dropout DDR termination linear regulators with an external bias supply input and a buffered reference output. V_CC is powered by a 2.7V to 3.6V supply that is commonly available in laptop and desktop computers. The 3.3V bias supply drives the gate of the internal pass transistor, while a lower voltage input at the drain of the transistor (IN) is regulated to provide VOUT. By using separate bias and power inputs, the MAX1510/MAX17510 can drive an n-channel high-side MOSFET and use a lower input voltage to provide better efficiency. The MAX1510/MAX17510 regulate their output voltage to the voltage at REFIN. When used in DDR applications as a termination supply, the MAX1510/MAX17510 deliver 1.25V or 0.9V at 3A peak (typ) from an input voltage of 1.1V to 3.6V. The MAX1510/MAX17510 sink up to 3A peak (typ) as required in a termination supply. The MAX1510/MAX17510 provide shoot-through protection, ensuring that the source and sink MOSFETs do not conduct at the same time, yet produce a fast source-to-sink load transient. The MAX1510/MAX17510 feature an open-drain PGOOD output that transitions high 2ms after the output initially reaches regulation. PGOOD goes low within 10μs of when the output goes out of regulation by ±150mV.

Applications

• Notebook/Desktop Computers
• DDR Memory Termination
• Active Termination Buses
• Graphics Processor Core Supplies
• Chipset/RAM Supplies as Low as 0.5V

Key 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