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SMM105NECR00 数据表(PDF) 11 Page - Summit Microelectronics, Inc. |
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SMM105NECR00 数据表(HTML) 11 Page - Summit Microelectronics, Inc. |
11 / 21 page SMM105 Preliminary Information Summit Microelectronics, Inc 2068 1.8 09/20/05 11 RTRIM(R3) is calculated as follows: VTRIMlow=0.3V, Regulator VREF=0.8V The current through R3 is ITRIM=(0.8-0.3)/RTRIM (ITRIM)(R4) > 15% of VOUT RTRIMmax should be < the calculated value C5 0.02uF R6 10K C1 1uF START R7 10K R5 20k C7 0.01uF For Example: If Vout=3.3V, R4=63.4K, 15% of Vout=0.5V ITRIM=8uA, RTRIM=62.5K Therefore Rtrim standard 1% value down from 62. J1 1 2 3 4 5 6 7 8 9 10 Gnd SCL Gnd3 SDA Rsrv5 MR +10V Rsrv8 +5V Rsrv10 START U1 SMM105 1 2 3 4 5 6 8 10 11 12 14 18 19 20 28 SCL A2 START A1 READY A0 WP# FILT_CAP FAULT# COMP2 VM TRIM_CAP COMP1 TRIM SDA R3 RTRIM FAULT# D1 DIODE READY VOUT SMX3200 I2C Programming Connector 10 pin Header R1 and R2 need only be placed once on the I2C bus C4 0.1uF R1 10K R2 10K R8 10K C8 0.1uF U2 Switching Regulator +Vout +Vin VADJ (VREF) PGOOD The SMM105 START pin must be inactive during power-up so that the TRIM pin is high impedence. Once power is nominal, the START pin can be active to start margin and ADOC functions R4 RSET1 +12VIN (+10V to +15V) Figure 7 – SMM105 Applications schematic for an adjustable switching regulator (Full regulator circuit not shown). APPLICATIONS INFORMATION (CONTINUED) |
类似零件编号 - SMM105NECR00 |
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类似说明 - SMM105NECR00 |
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