UCS3205

DS20006433A-page 6

 2020 Microchip Technology Inc.

Port Power Switch – AC Parameters

Minimum Start-up Time

tSTRT_EN

60

—

—

ms

Minimum time from VIN_STRT ≥ 3.1V

to an EN low-to-high transition

Start-up Current Limit

Duration

tSTRT_CLD

—

2.5

—

ms

Time from VIN > VUVLO until short

circuit and overcurrent comparator

are enabled (slew rate control

enabled), EN = 1 (Note 1)

Turn-On Delay

tON_SW

—

0.5

—

ms

Time from the transition of EN from

low-to-high until switch is on

(VOUT > 500 mV), COUT =10 µF,

DIR = 1, time from the transition of

EN from low-to-high until switch is

on (VIN > 500 mV), CIN =10 µF

Turn-Off Delay

tOFF_SW

—

150

230

µs

Time from the transition of EN from

high-to-low until switch is off

(VOUT < VIN – 500 mV), VIN =5V,

DIR = 0, DSC = 1, no COUT,

time from the transition of EN from

high-to-low until switch is off,

(VIN < VOUT – 500 mV), VOUT =5V,

RIN =50, DIR = 1,

50 k

to GND on VIN, no CIN

Charge Time

tCHARGE

—

1

—

ms

Time from the transition of EN from

low-to-high until VOUT =19V

(95% of VIN = 20V) with

RILIM =1.5k, COUT =10 µF (Note 1)

Discharge Time

tOUT_DISCHARGE

—

2

—

ms

Time from the transition of EN from

high-to-low until VOUT =0.8V

(VIN =20V), COUT = 10 µF,

DSC = 1 (Note 1)

OC Turn-Off Time

tOFF_SW_OC

—

10

—

µs

Time from overcurrent event

(current less than short-circuit limit)

to switch off after tMASK elapses

(10 ms), COUT = 10 µF

Turn-Off Time

tOFF_SW_ERR

—

7

—

µs

Time from TSD, OV, BV, SC event

to switch off, no COUT (Note 1)

VIN or VOUT Output Rise

Time

tR_IN_OUT

—

0.8

—

ms

Measured from 10% to 90% of

VOUT (VIN =20V), COUT = 10 µF

with RILIM= 1.5 k, 20 V/ms slew

rate, measured from 10% to 90% of

VIN (VOUT =20V), CIN = 10 µF

Short Circuit FAULT#

Assertion Time

tSHORT_FAULT

—

20

—

µs

Time from detection of short to port

power switch disconnect and

FAULT# pin assertion

ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, TA = +25°C, VIN or VOUT = 2.85V to 22V.

Characteristic

Symbol

Min.

Typ.

Max.

Unit

Conditions

Note 1: This parameter is characterized, not 100% tested.

2: This parameter is ensured by design.