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MAX1775 Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX1775 Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 16 page Pin Description PIN NAME FUNCTION 1 SHDNM Shutdown for Main Regulator. A low voltage on SHDNM shuts off the main output. For normal operation, connect SHDNM to IN. 2 SHDNC Shutdown for Core Regulator. A low voltage on SHDNC shuts off the core output. For normal operation, connect SHDNC to CVL. 3 PGND Power Ground. Ground for NDRV and core output synchronous rectifier. Connect all grounds together close to the IC. 4 NDRV N-Channel Drive Output. Drives the main output synchronous rectifier MOSFET. NDRV swings between CVL and PGND. 5 CVL Low-Side Regulator Bypass. CVL is the output of an internal LDO regulator. This is the internal power supply for the device control circuitry as well as the N-channel driver. Bypass CVL with a 1.0µF or greater capacitor to GND. When CS- is above the CVL switchover threshold (2.47V), CVL is powered from the main output. 6 IN Power Supply Input 7 PDRV P-Channel Drive Output. Drives the main output high-side MOSFET switch. PDRV swings between IN and CVH. The voltage at CVH is regulated at VIN - 4.3V unless the input voltage is less than 5.5V. 8 CVH High-Side Drive Bypass. CVH is the output of an internal LDO regulator with respect to VIN. This is the low-side of the P-channel driver output. Bypass with a 1.0µF capacitor or greater to IN. When the input voltage is less than +5.5V, CVH is switched to PGND. 9 REF Reference Voltage Output. Bypass REF to GND with a 0.22µF or greater capacitor. 10 FBM Main Output Feedback. Connect FBM to a resistive voltage-divider to set main output voltage between +1.25V to +5.5V. 11 CS+ Main Regulator High-Side Current-Sense Input. Connect the sense resistor between CS+ and CS-. This voltage is used to set the current limit and to turn off the synchronous rectifier when the inductor current approaches zero. 12 CS- Main Regulator Low-Side Current-Sense Input. Connect CS- to the main output. 13 FBC Core Output Feedback. Connect FBC to a resistive voltage-divider to set core output between +1.0V to +5.0V. 14 GND Analog Ground 15 INC Core Supply Input 16 LXC Core Converter Switching Node Dual-Output Step-Down DC-DC Converter for PDA/Palmtop Computers _______________________________________________________________________________________ 9 |
Similar Part No. - MAX1775_09 |
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Similar Description - MAX1775_09 |
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