UCS1003-3 datasheet(10/138 Pages) MICROCHIP

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UCS1003-1/2/3

DS20005346B-page 10

 2014-2015 Microchip Technology Inc.

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 is

restored to normal operation

Thermal Shutdown

Threshold

TTSD

—

135

—

°C

Die temperature at which port

power switch will turn off

Thermal Shutdown

Hysteresis

TTSD_HYST

—

°C

After shutdown, due to TTSD

being reached, die temperature

drop 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

(UCS1003-1 only)

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 discharge is 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 backdrive 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

(UCS1003-1 only)

200-1600 ms, default listed

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.

Characteristic

Sym.

Min.

Typ.

Max.

Unit

Conditions

Note 1:

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

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

This parameter is characterized, but not 100% production tested.

The current measurement full-scale range maximum value is 3.0A. However, the UCS1003-1 cannot report

values above ILIM (if IBUS_R2MIN  ILIM) or above IBUS_R2MIN (if IBUS_R2MIN > ILIM and ILIM 1.68A).

The Min and Max values represent the boundaries of a programmable range for UCS1003-1 only. Each value

in the range is typical.

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