Rainbow-electronics MAX17117 Manual do Utilizador descarregar pdf (Página 10)

Internal-Switch Boost Regulator with Integrated

7-Channel Scan Driver, Op Amp, and LDO

MAX17117

10 _____________________________________________________________________________________

Pin Description (continued)

PIN NAME FUNCTION

25 PGND Power Ground. Source connection of the internal step-up regulator power switch.

26 LX Switching Node. Connect inductor/catch diode here and minimize trace area for lowest EMI.

27 ENA

Chip-Enable Control and OCP Set Input. When ENA = low, the step-up converter and op amp are

disabled, the LDO remains active, and the level-shifter outputs are high impedance.

28 IN

Step-Up Regulator and Low-Dropout Regulator Supply. Bypass IN to AGND with a 1FF or greater

ceramic capacitor.

29 LDOO

Internal Linear Regulator Output. Bypass LDOO to AGND with a 1FF capacitor.

30 LDOADJ Linear Regulator Feedback Input. Reference voltage is 1.24V nominal.

31 DTS Gate-Shading Discharge Time Adjust

32 SS Step-Up Regulator Soft-Start Control

— EP

Exposed Backside Pad. Connect to the analog ground plane for proper electrical and thermal

performance.

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Rainbow-electronics MAX17117 Manual do Utilizador Página 10