UCS1001 datasheet(20/59 Pages) MICROCHIP

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USB Port Power Controller with Charger Emulation

Datasheet

Revision 1.2 (05-21-12)

SMSC UCS1001

DATASHEET

Note 3.2

For split supply systems using the Attach Detection feature, VS must not exceed VDD +

150 mV.

Port Power Switch Operation With Trip Mode Current Limiting

Region 2 Current Keep-

out

IBUS_R2MIN

0.1

Minimum VBUS Allowed

at Output

VBUS_MIN

2.0

Port Power Switch Operation With Constant Current Limiting (Variable Slope)

Region 2 Current Keep-

out

IBUS_R2MIN

1.5

Minimum VBUS Allowed

at Output

VBUS_MIN

2.0

VBUS Bypass - DC

On Resistance

RON_BYP



Leakage Current

ILEAK_BYP

µA

Switch off

Current Limit

IDET_CHG /

IBUS_BYP

VDD = 5 V and VBUS> 4.75 V

Allowed Charge Time

tDET_CHARGE

800

CBUS = 500 µF max

Charger Emulation Profile

General Emulation - DC

DP-DM Shunt Resistor

Value

RDCP_RES

200



Connected between DPOUT

and DMOUT

0 V < DPOUT = DMOUT < 3V

Voltage Output

SX_RXMAG_

VOLT_BC

0.5

DMOUT

250 µA load

Pull-down Current

SX_PUPD

_ACC_BC

µA

DPOUT or DMOUT = 0.15 V

Compliance voltage

General Emulation - AC

Emulation Reset Time

tEM_RESET

Table 3.3 Electrical Specifications (continued)

VDD = 4.5 V to 5.5 V, VS = 2.9 V to 5.5 V, VPULLUP = 3V to 5.5V, TA = -40 °C to 85 °C

all Typical values at VDD = VS = 5 V, TA = 27 °C unless otherwise noted.

CHARACTERISTIC

SYMBOL

MIN

TYP

MAX

UNIT

CONDITIONS

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