TPS74201 datasheet(13/34 Pages) TI1

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TPS74201

www.ti.com

SBVS064M – DECEMBER 2005 – REVISED OCTOBER 2015

Device Functional Modes (continued)

7.4.3 Disabled

The device is disabled under the following conditions:

•

The input or bias voltages are below the respective minimum specifications.

•

The enable voltage is less than the enable falling threshold voltage or has not yet exceeded the enable rising

threshold.

•

The device junction temperature is greater than the thermal shutdown temperature.

Table 1 shows the conditions that lead to the different modes of operation.

Table 1. Device Functional Mode Comparison

PARAMETER

OPERATING MODE

VIN

VEN

VBIAS

IOUT

Normal mode

VIN > VOUT(nom) + VDO (VIN)

VEN > VEN(high)

VBIAS ≥ VOUT + 1.4 V

I OUT < ICL

T J < 125°C

Dropout mode

VIN < VOUT(nom) + VDO (VIN)

VEN > VEN(high)

VBIAS < VOUT + 1.4 V

—

TJ < 125°C

Disabled mode

(any true condition disables

VIN < VIN(min)

VEN < VEN(low)

VBIAS < VBIAS(min)

—

TJ > 155°C

the device)

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