UCS1002-3 datasheet(8/114 Pages) MICROCHIP

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UCS1002-3

DS20006852A-page 8

 2023 Microchip Technology Inc. and its subsidiaries

Thermal Regulation Limit

TREG

—

110

—

°C

Die Temperature at which

current limit is reduced.

Thermal Regulation

Hysteresis

TREG_HYST

—

°C

Hysteresis for tREG functionality.

Temperature must drop by this

value before ILIM value

restored to normal operation.

Thermal Shutdown Threshold

TTSD

—

135

—

°C

Die Temperature at which port

power switch turns OFF.

Thermal Shutdown Hysteresis

TTSD_HYST

—

°C

After shutdown due to

TTSD being reached, a die

temperature drop is required

before port power switch can

be turned ON again.

Auto-Recovery Test Current

ITEST

—

190

—

Portable device attached,

VBUS = 0V, Die Temp < TTSD

Auto-Recovery Test Voltage

VTEST

—

750

—

Portable device attached,

VBUS = 0V before application,

Die Temp < TTSD

Programmable,

250-1000 mV, default listed

Discharge Impedance

RDISCHARGE

100

—



Port Power Switch – AC Parameters

Turn-On Delay

tON_PSW

—

0.75

—

PWR_EN active toggle to

switch on time, VBUS dis-

charge not active.

Turn-Off Time

tOFF_

PSW_INA

—

0.75

—

PWR_EN inactive toggle to

switch off time

CBUS = 120 µF

Turn-Off Time

tOFF_

PSW_ERR

—

Overcurrent Error, VBUS Min

Error, or Discharge Error to

switch off, CBUS = 120 µF

Turn-Off Time

tOFF_PSW_ERR

—

100

—

TSD or back-drive error to

switch off, CBUS = 120 µF

VBUS Output Rise Time

tR_BUS

—

1.1

—

Measured from 10% to 90% of

VBUS, CLOAD = 220 µF,

ILIM = 1.0A

Soft Turn-On Rate

IBUS/t

—

100

—

mA/µs

Temperature Update Time

tDC_TEMP

—

200

—

Programmable 200-1600 ms,

default listed

Short-Circuit Response Time

tSHORT_LIM

—

1.5

—

µs

Time from detection of short to

current limit applied. No CBUS

applied.

Short-Circuit Detection Time

tSHORT

—

Time from detection of short to

port power switch disconnect

and ALERT# pin assertion.

TABLE 1-2:

ELECTRICAL CHARACTERISTICS (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 +85°C; all Typical values at VDD = VS = 5V, TA = +27°C.

Parameter

Sym.

Min.

Typ.

Max.

Unit

Conditions

Note 1: For split supply systems using the Attach Detection feature, VS must not exceed VDD + 150 mV.

2: The current measurement full-scale range maximum value is 2.5A. However, the UCS1002-3 cannot

report values above ILIM (if IBUS_R2MIN  ILIM) or above IBUS_R2MIN (if IBUS_R2MIN > ILIM and ILIM 1.5A).

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