TPS53353_15 datasheet(6/37 Pages) TI

6 / 37 page

TPS53353

SLUSAK2B – AUGUST 2011 – REVISED FEBRUARY 2015

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Electrical Characteristics (continued)

Over recommended free-air temperature range, VVDD= 12 V (unless otherwise noted)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

POWERGOOD

PG in from lower

92.5%

95%

98.5%

VTHPG

PG threshold

PG in from higher

107.5%

110%

112.5%

PG hysteresis

2.5%

7.5%

RPG

PG transistor on-resistance

tPGDEL

PG delay

Delay for PG in

0.8

1.2

LOGIC THRESHOLD AND SETTING CONDITIONS

Enable

1.8

VEN

EN Voltage

Disable

0.6

IEN

EN Input current

VEN = 5 V

µA

RRF = 0 Ω to GND, TA = 25°C

(2)

200

250

300

RRF = 187 kΩ to GND, TA = 25°C

(2)

250

300

350

RRF = 619 kΩ, to GND, TA = 25°C

(2)

350

400

450

RRF = Open, TA= 25°C

(2)

450

500

550

fSW

Switching frequency

kHz

RRF = 866 kΩ to VREG, TA = 25°C

(2)

580

650

720

RRF = 309 kΩ to VREG, TA = 25°C

(2)

670

750

820

RRF = 124 kΩ to VREG, TA = 25°C

(2)

770

850

930

RRF = 0 Ω to VREG, TA = 25°C

(2)

880

970

1070

PROTECTION: CURRENT SENSE

ITRIP

TRIP source current

VTRIP = 1 V, TA = 25°C

9.4

10.6

µA

TRIP current temperature

TCITRIP

On the basis of 25°C(1)

4700

ppm/°C

coeffficient

Current limit threshold setting

VTRIP

VTRIP-GND

0.4

1.2

range

VTRIP = 1.2 V

37.5

VOCL

Current limit threshold

VTRIP = 0.4

7.5

12.5

17.5

VTRIP = 1.2 V

–160

–150

–140

VOCLN

Negative current limit threshold

VTRIP = 0.4 V

–58

–50

–42

Positive

VAZCADJ

Auto zero cross adjustable range

Negative

–15

–3

PROTECTION: UVP and OVP

VOVP

OVP trip threshold

OVP detect

115%

120%

125%

tOVPDEL

OVP proprogation delay

VFB delay with 50-mV overdrive

µs

VUVP

Output UVP trip threshold

UVP detect

65%

70%

75%

tUVPDEL

Output UVP proprogation delay

0.8

1.2

tUVPEN

Output UVP enable delay

From enable to UVP workable

1.8

2.6

3.2

UVLO

Wake up

4.2

4.33

VUVVREG

VREG UVLO threshold

Hysteresis

0.25

THERMAL SHUTDOWN

Shutdown temperature(1)

145

TSDN

Thermal shutdown threshold

°C

Hysteresis(1)

(2)

Not production tested. Test condition is VIN= 12 V, VOUT= 1.1 V, IOUT = 10 A using application circuit shown in Figure 38.

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