IMP252 4/2 7 POWER MANAGEMENT ADVANCE PRODUCT INFORMATION Quad USB High-Side Power Switch with Fault Detection Key Features 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 140mΩ maximum and the IMP2527 channel resistance is 300Ω 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 0.75µA when disabled and just 110µA 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 0.07Ω switch resistance. For dual-switch applications, refer to the IMP2526 data sheet. Typical Application Applications ◆ USB host and self-powered hubs ◆ USB video monitors ◆ USB printers Ferrite Bead IMP2527 5.1V ± 3% 5V ± 1% or IMP2524 5V ± 3% 4.7mF USB Rev. 1.1 and 2.0 Compliant Four independent switches 2.7V to 5.5V input operation Low MOSFET ON resistance – IMP2524: 0.1Ω, 0.14Ω maximum – IMP2527: 0.2Ω, 0.3Ω maximum 500mA continuos load current per switch Low supply current – 110µA ON-state current, 0.75µA OFF-state current 1.25A maximum current limit, 750mA typical Thermal shutdown 2.4V undervoltage lockout (UVLO) Open-drain flag output – Undervoltage – Current limit – Thermal shutdown Output can be force higher than input Active HIGH(-1) and active LOW(-2) enable 16-pin SO and DIP packages, Die available Pin compatible with the Micrel MIC2524 and MIC2527 10k + IN OUT LDO GND V+ ON/OFF OVERCURRENT USB Controller VBUS 27k 2 1 3 4 5 Data D+ D– 6 GND 1mF 7 8 IMP2524 IMP2527 ENA INA/B FLGA INC/D ENB OUTA FLGB OUTB ENC OUTC FLGC OUTD END GND FLGD GND 33mF* + 16 D+ 0.01mF GND 15 14 13 12 11 D– 0.1mF 33mF* Downstream USB Port 1 500mA max. VBUS + D+ 0.01mF 10 D– GND Downstream USB Port 2 500mA max. 9 VBUS 33mF* + Bold/Blue lines indicate 0.1" wide, 1-oz. copper high-current traces. D+ 0.01mF D– GND Downstream USB Port 3 500mA max. *33mF, 16V tantalum or 100mF, 10V electrolytic per port VBUS 33mF* + D+ 0.01mF D– GND Downstream USB Port 4 500mA max. 2524/27_01.eps © 1999 IMP, Inc. 408-432-9100/www.impweb.com 1 IMP252 4/2 7 Pin Configuration SO/DIP FLGA FLGA 1 16 FLGB ENA ENA 2 15 ENB FLGB OUTA 3 GND 4 IMP2524/27 14 OUTB ENB 2 16 15 5 12 GND 6 11 OUTD ENC 7 10 END FLGC FLGC 8 9 FLGD ENC FLGD 2524/27_02.eps END 7 FLGA 2 ENA 3 4 OUTA GND 5 INC/D 6 OUTC 7 ENC 8 FLGC 9 FLGD 10 END 11 12 OUTD GND 13 INA/B 14 OUTB 15 ENB 16 FLGB 14 6 Logic, Charge Pump 8 9 10 Pin Descriptions 1 13 Logic, Charge Pump IMP2524/27 INC/D Name Logic, Charge Pump 13 INA/B OUTC Pin Number 3 1 5 Logic, Charge Pump 11 4 12 GND GND OUTA INA/B OUTB OUTC INC/D OUTD 2524/27_03.eps Function Fault Flag A output. This open-drain output goes into an active-LOW state in response to undervoltage, current limit or thermal shutdown conditions. Enable A Input. This pin is the Channel B MOSFET switch driver control logic input. Both active-HIGH (-1 suffix) and active-LOW (-2 suffix) logic devices are available. Channel-A switch output (MOSFET Source). The output pin drives the load into ON and OFF states. Ground. Power supply return for the internal circuitry of the IC. Connect both pins 4 and 6 together. Channel C and D positive power supply input voltage. This is the switching MOSFET drain connection. It is the channel C and channel D supply voltage input for the logic and the charge-pump circuit. Channel-C switch output (MOSFET Source). The output pin drives the load into ON and OFF states. Enable C Input. This pin is the Channel B MOSFET switch driver control logic input. Both active-HIGH (-1 suffix) and active-LOW (-2 suffix) logic devices are available. Fault Flag C output. This open-drain output goes into an active-LOW state in response to undervoltage, current limit or thermal shutdown conditions. Fault Flag D output. This open-drain output goes into an active-LOW state in response to undervoltage, current limit or thermal shutdown conditions. Enable D Input. This pin is the Channel B MOSFET switch driver control logic input. Both active-HIGH (-1 suffix) and active-LOW (-2 suffix) logic devices are available. Channel-D switch output (MOSFET Source). The output pin drives the load into ON and OFF states. Ground. Power supply return for the internal circuitry of the IC. Connect both pins 4 and 6 together. Channel A and B positive power supply input voltage. This is the switching MOSFET drain connection. It is the channel A and channel B supply voltage input for the logic and the charge-pump circuit. Channel-B switch output (MOSFET Source). The output pin drives the load into ON and OFF states. Enable B Input. This pin is the Channel-B MOSFET switch driver control logic input. Both active-HIGH (-1 suffix) and active-LOW (-2 suffix) logic devices are available. Fault Flag B output. This open-drain output goes into an active-LOW state in response to undervoltage, current limit or thermal shutdown conditions. 2524/27t01 Ordering Information Pin Number Enable Logic Typical “ON” Resistance IMP2524-1BWM IMP2524-2BWM IMP2524-1BN IMP2524-2BN IMP2527-1BWM IMP2527-2BWM IMP2527-1BN IMP2527-2BN Active HIGH Active LOW Active HIGH Active LOW Active HIGH Active LOW Active HIGH Active LOW 100mΩ 100mΩ 100mΩ 100mΩ 200mΩ 200mΩ 200mΩ 200mΩ Temperature Range –40° –40° –40° –40° –40° –40° –40° –40° C to +85° C to +85° C to +85° C to +85° C to +85° C to +85° C to +85° C to +85° C C C C C C C C Pins-Package 16-SO 16-SO 16-DIP 16-DIP 16-SO 16-SO 16-DIP 16-DIP 2524/27t02 2 408-432-9100/www.impweb.com © 1999 IMP, Inc. IMP252 4/2 7 Absolute Maximum Ratings Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . +8.0V Fault Flag Voltage . . . . . . . . . . . . . . . . . . . . . . +8.0V Fault Flag Current . . . . . . . . . . . . . . . . . . . . . . 50mA Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . . +8.0V Output Current . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited Enable Input . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 12V Storage Temperature . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C Lead Temperature (Soldering, 5 sec.) . . . . . . . 260°C Package Thermal Resistance SO (θJA ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160°C/W DIP(θJA ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130°C/W Note: All voltages are referenced to GND. These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. Electrical Characteristics Unless otherwise noted, VIN = 5V and TA = 25°C. Parameter Symbol Conditions Supply Voltage Range VIN Operating Temperature Range TA TA = – 40°C to +85°C Min Typ Max Units 2.7 5.5 V – 40 85 °C Supply Current Switch OFF IIN OFF Switch OFF, No load VENOFF ≤ 0.8V, VENON ≥ 2.4V IMP2524/27-1 VENON ≤ 0.8V, VENOFF ≥ 2.4V IMP2524/27-2 0.75 10 µA Supply Current Switch ON IIN ON Switch ON, No load VENOFF ≤ 0.8V, VENON ≥ 2.4V IMP2524/27-1 VENON ≤ 0.8V, VENOFF ≥ 2.4V IMP2524/27-2 110 320 µA Enable Input Threshold VENH LOW to HIGH (“0” to “1”) Enable Voltage, Note 1 2.1 2.4 V VENL HIGH to LOW (“1” to “0”) Enable Voltage, Note 1 µA Enable Input Current IEN Enable Input Capacitance CEN Switch ON Resistance RON Continuous Load Current IL 0.8 1.9 VEN = 2.4V 0.01 1 VEN = 0.8V 0.01 1 1 pF IMP2524: IOUT = 500mA each switch 0.10 0.14 IMP2527: IOUT = 500mA each switch 0.20 0.30 Each output 0.5 Ω A Output Turn-On Delay TDON RL = 10Ω each output 0.25 ms Output Turn-On Rise Time TRON RL = 10Ω each output 1 ms Output Turn-Off Delay TDOFF RL = 10Ω each output 1 20 µs Output Turn-Off Fall Time TFOFF RL = 10Ω each output 1 20 µs Output Leakage Current IOFF 10 µA Short-circuit Current Limit ISC 0.75 1.25 A 0.50 Overtemperature Shutdown TJ increasing 135 Threshold TJ decreasing 125 Error Flag Output Resistance RFLAG VIN = 5V, IL = 10mA 10 VIN = 3.3V, IL = 10mA 15 Error Flag Output Current IFLAG VFLAG = 5V 0.01 UVLO Threshold VUVLO VIN Increasing 2.5 VIN Decreasing 2.3 °C Ω 1 µA V Notes 1. Switch OFF is VEN ≤ 0.8V and Switch ON is VEN ≥ 2.4V for the IMP2524/27-1. Switch OFF is VEN ≥ 2.4V and Switch ON is VEN ≤ 0.8V for the IMP2524/27-2. The Enable input has approximately 200mV of hysteresis. © 1999 IMP, Inc. 408-432-9100/www.impweb.com 3 IMP252 4/2 7 Package Dimensions Plastic DIP (16-Pin) Inches Min D1 Millimeters Max Min Max Plastic DIP (16-Pin)* N E1 E D A2 A A1 L e 0°–15° B1 C eA eB B Plastic DIP (16-Pin).eps SO (16-Pin) E H 0°– 8° A C L B ——— 0.015 0.125 0.016 0.045 0.008 0.745 0.005 0.300 0.240 0.100 0.300 ——— 0.115 0.200 ——— 0.175 0.022 0.065 0.012 0.765 0.080 0.325 0.310 ——— ——— 0.400 0.150 ——— 0.38 3.18 0.41 1.14 0.20 18.92 0.13 7.62 6.10 2.54 7.62 ——— 2.92 5.08 ——— 4.45 0.56 1.65 0.30 19.43 2.03 8.26 7.87 ——— ——— 10.16 3.81 SO (16-Pin)** D e A A1 A2 B B1 C D D1 E E1 e eA eB L A1 IMP, Inc. Corporate Headquarters 2830 N. First Street San Jose, CA 95134-2071 Tel: 408-432-9100 Tel: 800-438-3722 Fax: 408-434-0335 e-mail: [email protected] http://www.impweb.com The IMP logo is a registered trademark of IMP, Inc. All other company and product names are trademarks of their respective owners. 16-Pin (SO).eps A 0.926 0.1043 A1 0.0040 0.0118 B 0.013 0.020 C 0.0091 0.0125 D 0.3977 0.4133 E 0.2914 0.2662 e 0.050 BSC H 0.394 0.419 L 0.016 0.050 * JEDEC Drawing MO-058AB ** JEDEC Drawing MS-013AA 2.35 2.65 0.10 0.30 0.33 0.51 0.23 0.32 10.10 10.50 7.40 7.60 1.27 BSC 10.00 10.65 0.40 1.27 2524/26_t03.at3 © 1999 IMP, Inc. Printed in USA Publication #: 5005 Revision: B Issue Date: 05/17/00 Type: Preliminary