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Maxim dc/dc regulator occupies 490.32mm? footprint

Posted: 10 Dec 2002 ?? ?Print Version ?Bookmark and Share

Keywords:maxim integrated products? max1945? max1945r? max1945s? dc/dc regulator ic?

The MAX1945 internal switch, step-down dc/dc regulator from Maxim Integrated Products Inc. occupies a footprint of 490.32mm? and is suitable to generate core and I/O supplies for DSP, FPGAs, ASICs, and microprocessors.

Available in a thermally enhanced, 28-pin TSSOP with an exposed metal pad, the IC integrates power MOSFETs to reduce the size and complexity of the circuit. It also includes digital soft-start, current limit/short-circuit protection, and thermal-overload protection functions.

The MAX1945 operates from a 2.6V to 5.5V input and generates output voltages down to 0.8V. When a 3V to 5.5V bias supply is available, the device can operate from voltages as low as 2.25V. Its selectable 500kHz or 1MHz switching frequency further reduces the size and cost of external components. The MAX1945 is compatible with both ceramic and electrolytic capacitors.

For noise-sensitive applications, the 6A device can be synchronized with an external clock. The regulator also provides a 180 out-of-phase clock output to synchronize another switching regulator and reduce input capacitors for dual-output applications.

Voltage margining permits logic controls to shift the output voltage extremes in the regulator (by 5 percent maximum in the MAX1945R and 10 percent maximum in the MAX1945S) to perform production line corner tests.

The MAX1945 is specified for operation over the extended industrial temperature range and is priced starting at $4.20 (1,000-up).

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