UCC28C53_V01 datasheet(7/48 Pages) TI

7 / 48 page

VVDD = 20V for UCC28C56H/L, UCC28C57H/L, and UCC28C58/9, VVDD = 15 V for all other device options, RRT = 10 kΩ,

CCT = 3.3 nF, CVDD = 0.1 µF and no load on the outputs, –40°C ≤ TJ ≤ 125°C for the UCC28C5x, 0°C ≤ TJ ≤ 85°C, for the

UCC38C5x (unless otherwise noted).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX UNIT

PSRR

Power supply rejection ratio(2) (5)

12 V ≤ VVDD ≤ 18 V

ICS

Input bias current

–0.1

–2

µA

CS to output delay

COMP to CS offset

VCS = 0 V

1.15

OUTPUT

VOUT(low)

RDS(on) pulldown

ISINK = 200 mA

5.5

VOUT(high) RDS(on) pullup

ISOURCE = 200 mA

tRISE

Rise time

TA = 25°C, COUT = 1 nF

tFALL

Fall time

TA = 25°C, COUT = 1 nF

UNDERVOLTAGE LOCKOUT

VDDON

Start threshold(6)

UCCx8C52, UCCx8C54

13.5

14.5

15.5

UCCx8C53, UCCx8C55

7.8

8.4

UCCx8C50, UCCx8C51

6.5

7.5

UCC28C56H, UCC28C57H

17.6

18.8

UCC28C56L, UCC28C57L

17.6

18.8

UCC28C58, UCC28C59

14.8

17.2

VDDOFF

Minimum operating voltage(6)

UCCx8C52, UCCx8C54

UCCx8C53, UCCx8C55

7.6

8.2

UCCx8C50, UCCx8C51

6.1

6.6

7.1

UCC28C56H, UCC28C57H

15.5

UCC28C56L, UCC28C57L

14.5

UCC28C58, UCC28C59

12.5

VDDHyst

VDDON - VDDOFFq

UCCx8C52, UCCx8C54

5.4

5.5

UCCx8C53, UCCx8C55

0.8

0.9

UCCx8C50, UCCx8C51

0.4

0.5

UCC28C56H, UCC28C57H

3.1

3.3

UCC28C56L, UCC28C57L

4.1

4.3

UCC28C58, UCC28C59

3.4

3.5

PWM

DMAX

Maximum duty cycle

UCCx8C52, UCCx8C53, UCCx8C50,VFB < 2.4 V

94%

96%

UCC28C56H, UCC28C56L, UCC28C58,VFB < 2.4

94%

96%

UCCx8C54, UCCx8C55, UCCx8C51,VFB < 2.4 V

47%

48%

UCC28C57H, UCC28C57L, UCC28C59,VFB < 2.4

47%

48%

DMIN

Minimum duty cycle

VFB > 2.6 V

CURRENT SUPPLY

ISTART-UP Start-up current

VVDD = VDDON – 0.5 V

µA

IVDD

Operating supply current

VFB = VCS = 0 V

1.3

(1)

For UCC28C56H/L, UCC28C57H/L and UCC28C58/9 adjust VVDD to a value above the start threshold before setting it to 20 V. For all

other device options, adjust VVDD to a value above the start threshold before setting it to 15.5 V

(2)

Specified by design. Not production tested.

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UCC28C53, UCC28C54, UCC28C55

UCC28C56H, UCC28C57H, UCC28C57L, UCC28C59

SLUSER8 – JUNE 2022

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