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ACT6390MH-T Datasheet(PDF) 2 Page - Active-Semi, Inc |
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ACT6390MH-T Datasheet(HTML) 2 Page - Active-Semi, Inc |
2 / 11 page ACT6390/ACT6391 Rev0, 13-May-08 Innovative PowerTM - 2 - www.active-semi.com Copyright © 2008 Active-Semi, Inc. PIN NAME DESCRIPTION 1 COMP Error Amplifier Compensation Node. Connect to a resistor RC and capacitor CC in series to ground. 2 FB Feedback Input. Connect this pin a resistor divider from the output to set the output voltage. FB is regulated to 1.24V. 3 EN Enable Control. Connect to a logic high level to enable the IC. Connect to a logic low level to disable the IC. When unused, connect EN pin to IN (do not leave pin floating). 4 G Ground. 5 SW Switch Output. Connect this pin to the inductor and the schottky diode. To minimize EMI, mini- mize the PCB trace path between this pin and the input bypass capacitor. 6 IN Supply Input. Bypass to G with a 1µF or larger capacitor. 7 FREQ Frequency Setting Pin. A logic low sets the switching frequency at 700kHz. A logic high sets the switching frequency at 1.3MHz. This pin has an internal 5.5µA pull-down current. 8 SS Soft Start Control Input. Connect a capacitor from this pin to G to set soft-start timing duration (tSS = 2.2 x 10 5 x CSS). SS is discharged to ground in shutdown. SS may be left unconnected if soft start is not desired. PIN CONFIGURATION PIN DESCRIPTIONS ORDERING INFORMATION MSOP-8 PART NUMBER CURRENT LIMIT PACKAGING ACT6390MH-T 1.7A TAPE & REEL ACT6391MH-T 2.5A TAPE & REEL TEMPERATURE RANGE -40°C to 85°C -40°C to 85°C PACKAGE MSOP-8 MSOP-8 PINS 8 8 8 6 5 1 3 4 COMP FB G SS IN SW 7 2 EN FREQ ACT6390 ACT6391 |
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