SP2525 Ver la hoja de datos (PDF) - Signal Processing Technologies

Número de pieza

componentes Descripción

Fabricante

SP2525

+3.0V to +5.5V USB Power Control Switch

Signal Processing Technologies 

USB

Controller

USB Peripheral

VBUS

USB

Cable

USB Host

4.7µF

GND

SP2525-2

ENA 1

8 OUTA

FLGA 2

7 IN

FLGB 3

ENB 4

6 GND

5 OUTB

0.1µF

CBULK

CBULK

OUTA

PORT A

GND

GND

PORT B

OUTB

Figure 7. Soft Start Circuit Configuration for SP2526 Applications with Large Load Capacitances

USB Requirement

SP2525 Compliant Feature

Inrush current limiting required

Soft start turns on in 1ms

Suspend State of <500µA Required

Suspend Current of 1µA maximum

Bus powered hubs must have 350mV maximum

drop from cable plug to port

Switch on resistance of 140mΩ maximum

(translates to 70mV at 500mA)

Voltage supplied to host or hub port is +4.75V to +5.25V Operating range of +3.0V to +5.5V

A device that draws bus power must have a stable

supply within 100ms of VBUS reaching +4.4V

Over-current reporting capability required

Turns on in 1ms

Open drain fault flags

Table 1. USB Protocol Compliance of the SP2525 Device

Rev. 8/21/01

SP2525 +3.0 to +5.5 Power Control Switch

10

© Copyright 2001 Sipex Corporation

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