MAX728

Input Voltage . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . .45V
Switch Voltage with Respect to Input Voltage. . . . . . . . . . . . . . . .50V
Switch Voltage with Respect to GND Pin (VSW negative)
(Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . .35V
SENSE Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V, +10V
Operating Temperature Ranges
MAX72_CCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
MAX72_ECK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Junction Temperature Ranges:
MAX72_CCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .0°C to +125°C
MAX72_ECK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +125°C
Storage Temperature Range . . . . . . . . . . .. . . . . . -65°C to +160°C
Lead Temperature (soldering, 10sec). . . . . . . . . . . . .. . . . . .+300°C

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The MAX727/MAX728/MAX729 are monolithic, bipolar, pulse-width modulation (PWM), switch-mode, step-down DC-DC regulators. Each is rated at 2A. Very few external components are needed for standard operation because the power switch, oscillator, feedback, and control circuitry are all on-chip. Employing a classic buck topology, these regulators MAX728 perform high-current step-down functions.

These regulators MAX728 have excellent dynamic and transient response characteristics, while featuring cycle-by-cycle current limiting to protect against overcurrent faults and shortcircuit output faults. They also have a wide 8V to 40V input range.

Each regulator MAX728 is available in a 5-pin TO-220 package. These MAX728 have a preset 100kHz oscillator frequency and a preset current limit of 2.6A. See the MAX724/ MAX726 data sheet for more applications information.