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CM2026 Datasheet(PDF) 1 Page - Champion Microelectronic Corp. |
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CM2026 Datasheet(HTML) 1 Page - Champion Microelectronic Corp. |
1 / 7 page CM2026 DUAL USB POWER CONTROL SWITCH 2002/05/29 Rev. 2 Champion Microelectronic Corporation Page 1 GENERAL DESCRIPTION FEATURES The CM2026 is a dual integrated high-side power switch with independent enable and flag functions, optimized for self-powered and bus-powered Universal Serial Bus (USB) applications. Few external components are necessary to satisfy USB requirements. The CM2026 satisfies the following USB requirements: each switch channel supplies up to 500mA as required by USB downstream devices; the switch's low on-resistance meets USB voltage drop requirements; fault current is limited to typically 750mA, well below the UL 25VA safety requirements; and a flag output is available to indicate fault conditions to the local USB controller. Soft start eliminates the momentary voltage drop on the upstream port that may occur when the switch is enabled in bus-powered applications. Additional features include thermal shutdown to prevent catastrophic switch failure from high-current loads, undervoltage lockout (UVLO) to ensure that the device remains off unless there is a valid input voltage present, and 3.3V and 5V logic compatible enable inputs. The CM2026 is available in active-high version in 8-pin DIP and SOIC packages. Compliant to USB specifications UL Recognized Component 2 independent switches 3V to 5.5V input 500mA minimum continuous load current per port 140mΩ maximum on-resistance 1.25A maximum short circuit current limit Individual open-drain fault flag pins 110uA typical on-state supply current 1uA typical off-state supply current Output can be forced higher than input (off-state) Thermal shutdown 2.4V typical undervoltage lockout (UVLO) 1ms turn-on (soft-start) and fast turnoff Active-high enable version 8-pin SOIC and DIP packages APPLICATIONS PIN CONFIGURATION USB host and self-powered hubs USB bus-powered hubs Hot plug-in power supplies Battery-charger circuit PDIP-08/SOP-08 (Top View) 1 2 3 4 8 7 6 5 EN1 FLG1 FLG2 EN2 OUT1 IN GND OUT2 |
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