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IMP2524-1BWM Datasheet(PDF) 3 Page - A1 PROs co., Ltd. |
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IMP2524-1BWM Datasheet(HTML) 3 Page - A1 PROs co., Ltd. |
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3 / 32 page  © 2000 IMP, Inc. 408-432-9100/www.impweb.com 1 IMP252 IMP252 4/2 4/277 POWER MANAGEMENT ADVANCE PRODUCT INFORMATION Applications N USB host and self-powered hubs N USB video monitors N USB printers N USB Rev. 1.1 and 2.0 Compliant N Four independent switches N 2.7V to 5.5V input operation N Low MOSFET ON resistance – IMP2524: 0.1 Ω, 0.14Ω maximum – IMP2527: 0.2 Ω, 0.3Ω maximum N 500mA continuos load current per switch N Low supply current – 110µA ON-state current, 0.75µA OFF-state current N 1.25A maximum current limit, 750mA typical N Thermal shutdown 2.4V undervoltage lockout (UVLO) N Open-drain flag output – Undervoltage – Current limit – Thermal shutdown N Output can be force higher than input N Active HIGH(-1) and active LOW(-2) enable N 16-pin SO and DIP packages, Die available N Pin compatible with the Micrel MIC2524 and MIC2527 Typical Application Quad USB High-Side P Quad USB High-Side Po ow wer er Switc Switch wit h with F h Fault Det ault Detection ection The IMP2524 and IMP2527 are complete power management solutions for bus-powered and self-powered USB hubs. Each device contains four independent power switches and fault detection logic. The IMP2524 channel resistance is a low 140m Ω maximum and the IMP2527 channel resistance is 300 Ω maximum. Both device operate with voltage inputs from 2.7V to 5.5V The IMP2524/2527 conform to the new USB 1.1 standard. Fault current is limited to 750mA typically, and a flag output for each switch conveys fault information to the local USB controller. The IMP252x “Soft-Start” function ramps the ON-current to eliminate any excessive voltage drop on the input side that could occur when capacitive loads are charged. Self-monitoring features include thermal shutdown to prevent catastrophic switch failure from high-current loads and undervoltage lockout (UVLO) that insures that the device remains OFF unless there is sufficient supply voltage present. The switch Enable input logic can interface with both 3.3V and 5V logic. Both active-HIGH (-1 devices) and active-LOW (-2 devices) enable logic versions are available. Supply current is a low 0.75 µA when disabled and just 110 µA when enabled The quad IMP2524/7 devices are available in 16-pin DIP and 16-pin SO packages and are pin compatible replacements for the Micrel MIC2524-1/-2 and MIC2527-1/2 devices. IMP offers a complete family of USB power management products. For single-switch applications see the IMP2525 and IMP2525A data sheets. The single-switch IMP2525A features a 0.07 Ω switch resistance. For dual-switch applications, refer to the IMP2526 data sheet. Data Ferrite Bead 2 1 3 4 5 6 7 8 INA/B INC/D OUTA OUTB OUTC OUTD GND GND 16 15 14 13 12 11 10 9 ENA FLGA ENB FLGB ENC FLGC END FLGD IMP2524 IMP2527 USB Controller V+ D+ D– ON/OFF OVERCURRENT LDO OUT IN GND GND 27k 1 mF 0.01 mF 0.1 mF 10k 2524/27_01.eps 33 mF* GND D– D+ Downstream USB Port 1 500mA max. VBUS + IMP2527 5.1V ± 3% 5V ± 1% or IMP2524 5V ± 3% 0.01 mF 33 mF* GND D– D+ Downstream USB Port 2 500mA max. VBUS + 4.7 mF + 0.01 mF 33 mF* GND D– D+ Downstream USB Port 3 500mA max. VBUS + 0.01 mF 33 mF* GND D– D+ Downstream USB Port 4 500mA max. VBUS + Bold/Blue lines indicate 0.1" wide, 1-oz. copper high-current traces. *33 mF, 16V tantalum or 100mF, 10V electrolytic per port Key Features |
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