TPS544C20RVFR datasheet(11/75 Pages) TI1

Part #	TPS544C20RVFR

Description	4.5-V to 18-V, 20-A, and 30-A SWIFT Synchronous Buck Converters with PMBus

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Manufacturer	TI1 [Texas Instruments]

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11

TPS544B20, TPS544C20

www.ti.com

SLUSB69B – MAY 2014 – REVISED JULY 2016

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(1)

On-times are production tested, but steady-state switching frequency is not.

(2)

Specified by design. Not production tested.

(3)

Minimum off time for valid current sensing is 400-ns typical, 500-ns maximum.

7.6 Switching Characteristics

VIN = VDD = 12 V, TA = 25 ºC, RRT = 38.3 kΩ (unless otherwise specified).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

TON GENERATOR AND SW TIMING

fSW

Switching frequency(1)

Adjustment range

250

1000

kHz

RRT = 10.0 kΩ

210

250

290

RRT = 17.8 kΩ

250

300

350

RRT = 27.4 kΩ

340

400

460

RRT = 38.3 kΩ

425

500

575

RRT = 56.2 kΩ

550

650

750

RRT = 86.6 kΩ

640

750

860

RRT = 133 kΩ

720

850

980

RRT = 205 kΩ

850

1000

1150

IRT

RT output current

9.75

µA

tOFF(min)

Minimum off-time(2) (3)

175

ns

tON(min)

Minimum controllable pulse width(2)

80

ns

VDCAP2

D-CAP2 mode threshold

2.10

V

VDCAP

D-CAP mode threshold

0.8

V

IMODE

MODE output current

7

13

µA

tDEAD

Power stage driver dead-time(2)

SW rising

15

ns

SW falling

15

tSLEW(SW)

SW slew rate(2)

SW rising (10% to 90%), IOUT = 30

A, RBOOT= 0 Ω

9.2

V/ns

SW falling (90% to 10%), IOUT = 30

A, RBOOT= 0 Ω

6.2

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