UCS2112 datasheet(5/64 Pages) MICROCHIP

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DS20005424B-page 5

UCS2112

Port Power Switch

Port Power Switch - DC Parameter

Overvoltage Lockout

VS_OV

—6

—

Note 2

VS Low Threshold

VS_UVLO

—2.5

—

Note 2

VS Low Hysteresis

VS_UVLO_HYST

—

100

—

Note 2

On Resistance

RON_PSW

—40

—



4.75V < VS < 5.25V

VS Leakage Current

ILEAK_VS

—

µA

Sleep state into VS pin on one

channel (Note 1)

Back-voltage Protection

Threshold

VBV_TH

—

150

—

VBUS > VS

VS > VS_UVLO

Back-drive Current

IBD_1

—0

µA

VDD < VDD_TH,

Leakage current from VBUS pins

to the VDD and the VS pins

(Note 1)

IBD_2

—0

µA

VDD > VDD_TH,

Leakage current from VBUS pins

to the VDD (in Detect State) or

the VS pins (in Active State)

(Note 1)

Selectable Current Limits

ILIM1

—

530

—

ILIM Resistor = 0 or 47 k

(530 mA setting)

ILIM2

—

960

—

ILIM Resistor = 10 k or 56 k

(960 mA setting) (Note 4)

ILIM3

—

1070

—

ILIM Resistor = 12 k or 68 k

(1070 mA setting) (Note 4)

ILIM4

—

1280

—

ILIM Resistor = 15 k or 82 k

(1280 mA setting) (Note 4)

ILIM5

—

1600

—

ILIM Resistor = 18 k or 100 k

(1600 mA setting) (Note 4)

ILIM6

—

2130

—

ILIM Resistor = 22 k or 120 k

(2130 mA setting) (Note 4)

ILIM7

—

2670

—

ILIM Resistor = 27 k or 150 k

(2670 mA setting) (Note 4)

ILIM8

3000

3200

3400

ILIM Resistor = 33 k or VDD

(3200 mA setting)

Pin Wake Time

tPIN_WAKE

—3

—

SMBus Wake Time

tSMB_WAKE

—4

—

Idle Sleep Time

tIDLE_SLEEP

—

200

—

Thermal Regulation Limit

TREG

—

110

—

°C

Die Temperature at which

current limit will be reduced

Thermal Regulation

Hysteresis

TREG_HYST

—

°C

Hysteresis for tREG functionality.

Temperature must drop by this

value before ILIM value restored

to normal operation

TABLE 1-2:

ELECTRICAL SPECIFICATIONS (CONTINUED)

Electrical Characteristics:

Unless otherwise specified, VDD = 4.5V to 5.5V, VS = 2.9V to 5.5V,

VPULLUP = 3V to 5.5V, TA = -40°C to 105°C. All typical values at VDD = VS = 5V, TA = 27°C.

Characteristic

Symbol

Min.

Typ.

Max.

Unit

Conditions

Note

This parameter is characterized, not 100% tested.

This parameter is ensured by design and not 100% tested.

The current measurement full scale range maximum value is 3.4A. However, the UCS2112 cannot report values above

ILIM (if IBUS_R2MIN  ILIM) or above IBUS_R2MIN (if IBUS_R2MIN > ILIM and ILIM  1.6A).

This parameter is characterized, not 100% production tested.

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