IMP2524-1BN 查看數據表（PDF） - A1 PROs co., Ltd.

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IMP2524-1BN

Quad USB High-Side Power Switch with Fault Detection

A1 PROs co., Ltd. 

IMP2525A

POWER MANAGEMENT

Low-Resistance

USB High-Side Power Switch

- Single switch

- 0.07Ω "ON" resistance at 3V

- 50% lower resistance than MIC2525

- MIC2525 pin compatible

The IMP2525A high-side power switch IC is designed for self-powered

and bus-powered Universal Serial Bus (USB) power supply and power

management applications. The IMP2525A conforms to USB standards

with a low output switch ON-resistance (RON) and minimal voltage drop

across the switch. Switch resistance is 50% lower than the MIC2525. The

fault current is limited to 1.5A typically, and a flag output conveys fault

conditions to the local USB controller. The IMP2525A provides a

“Soft-Start” function that ramps up the ON-current to eliminate any

excessive voltage drop on the input side that could occur due to charg-

ing a capacitive load in bus-powered applications. 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 a valid supply voltage present.

The Enable input logic can be interfaced with both 3.3V and 5V logic.

Both active-HIGH and active-LOW enable logic versions are available.

The IMP2525A devices are available in 8-pin DIP and 8-pin SO packages.

IMP offers a complete family of USB power management products. For

dual-switch applications see the IMP2526 data sheet and for quad-switch

application, see the IMP2524. The single-switch IMP2525 matches the

performance of the Micrel MIC2525.

Block Diagrams

Key Features

N Meets or exceeds USB Rev. 1.1 and 2.0

specification

N Low MOSFET RON (0.07Ω at 3V)

N Pin compatible with the Micrel MIC2525

– 50% lower than MIC2525

N 2.7V to 5.5V input operation

N Current limiting

N Soft-start turn-on (1ms) prevents turn-on glitches

N 500mA continuous load current

N MOSFET short-circuit current limit (2.5A max)

N Low supply current

– 110µA ON state current, 1µA OFF state current

N Active-LOW or Active-HIGH Enable input

N 3.3V or 5V logic compatibility

N Open-drain Fault Flag indicates three fault

conditions:

– Undervoltage

– Current limit

– Thermal shutdown

N 2.4V Undervoltage Lockout (UVLO)

Applications

N USB power management

N USB hosts and self-powered hubs

N Battery-charger circuits and power supplies

IN 7

EN 1

1.2V

Reference

UVLO

Thermal

Shutdown

Oscillator

Current

Limit

50% Lower

Resistance

Than MIC2525

Power

Switch

Gate

Control

Charge

Pump

8 OUT

6 OUT

2

FLG

3

GND

IMP2525A

2525A_01.eps

© 2000 IMP, Inc.

408-432-9100/www.impweb.com

1

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