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MAX6774 Datasheet(PDF) 2 Page - Maxim Integrated Products |
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MAX6774 Datasheet(HTML) 2 Page - Maxim Integrated Products |
2 / 5 page Quick Start Recommended Equipment Before beginning, the following equipment is needed: • An adjustable output power supply capable of sup- plying at least 12V at 100mA Procedure The MAX6765 EV kit is fully assembled and tested. Follow the steps below to verify board operation: 1) Ensure that jumpers J1, J4, and J6 are shorted. 2) Connect the power supply to the IN and GND connections. 3) Set the power supply output to 12V and observe LED1. Detailed Description The MAX6765 operates from 4V to 72V and provides a fixed or adjustable regulator output. The regulator can source 100mA, subject to thermal dissipation limits. Table 1 lists the function of each jumper on the EV kit. Voltage Regulator Output OUT provides a regulated voltage at 5V. Reset Timeout The reset output remains asserted for a certain minimum period, which is controlled by jumper J6. If J6 is shorted, the reset period is the default of 12.5ms. If J6 is open, capacitor C4 sets the timeout period to 26.8ms, but this can easily be changed using the following equation: where tRP is in seconds and C4 is in farads. Refer to the MAX6765-MAX6774 IC data sheet for more information on capacitor selection. tC x V A RP = ⎛ ⎝⎜ ⎞ ⎠⎟ 4 6 122 10 . MAX6765 Evaluation Kit 2 _______________________________________________________________________________________ JUMPER POSITION FUNCTION Open Regulator disabled J1 Closed* Regulator enabled Open Hold mode disabled J2 (MAX6767/ MAX6768 only) Closed Hold mode enabled Open ENABLE2 low J3 (MAX6771/ MAX6772 only) Closed ENABLE2 high Open LED1 disabled J4 Closed* LED1 enabled 1-2 Regulator voltage set by R5 and R6 J5 (MAX6767– MAX6774 only) 2-3 Regulator voltage fixed Open Reset timeout set by C4 to 26.8ms J6 Closed* Reset timeout fixed at 12.5ms Table 1. Jumper Functions (J1–J6) * Default position. |
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