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ACT4088 Datasheet(PDF) 2 Page - Active-Semi, Inc |
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ACT4088 Datasheet(HTML) 2 Page - Active-Semi, Inc |
2 / 11 page ACT4088 Rev 1, 14-Feb-11 Innovative PowerTM - 2 - www.active-semi.com Copyright © 2011 Active-Semi, Inc. ORDERING INFORMATION PIN CONFIGURATION PIN DESCRIPTIONS PART NUMBER TEMPERATURE RANGE PACKAGE PINS PACKING ACT4088US-T -40°C to 85°C SOT23-6 6 TAPE & REEL TOP MARK FRWJ SOT23-6 PIN NUMBER PIN NAME PIN DESCRIPTION 1 SW Switch Output. Connect this pin to the switching end of the inductor. 2 IN Power supply input. Bypass this pin with a 10µF ceramic capacitor to G, placed as close to the IC as possible. 3 EN Enable Input. EN is pulled up to 5V with a 2µA current, and contains a precise 1.24V logic threshold. Drive this pin to a logic-high or leave unconnected to enable the IC. Drive to a logic-low to disable the IC and enter micro-power shutdown mode. 4 FB Feedback Input. The voltage at this pin is regulated to 0.81V. Connect to the center point of a resistive voltage-divider between OUT and G to set the output voltage. 5 G Ground and Heat sink. Connect this pin to a large, uncovered PCB copper area for best heat dissipation. 6 BST Bootstrap. This pin acts as the power supply for the high-side switch’s gate driver. Connect a 22nF capacitor between this pin and SW. 6 5 4 1 2 3 ACT4088 BST G FB SW IN EN |
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