TPS51117 datasheet(3/22 Pages) TI

3 / 22 page

www.ti.com

ELECTRICAL CHARACTERISTICS

TPS51117

SLVS631 – DECEMBER 2005

over operating free-air temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY CURRENT

V5FILT + V5DRV current, PWM, EN_PSV = float, VFB

IV5FILTPWM

Supply current

400

750

µA

= 0.77V, LL = –0.1 V

V5FILT + V5DRV current, auto-skip, EN_PSV = 5 V,

IV5FILTSKIP

Supply current

250

470

µA

VFB = 0.77V, LL = 0.5 V

IV5DRVSDN

V5DRV shutdown current

V5DRV current, EN_PSV = 0 V

µA

IV5FILTSDN

V5FILT shutdown current

V5FILT current, EN_PSV = 0 V

4.5

7.5

µA

VOUT AND VFB VOLTAGES

VOUT

Output voltage

Adjustable output range

0.75

5.5

VVFB

VFB regulation voltage

750

TA = 25°C, bandgap initial accuracy

–0.9%

0.9%

VFB regulation voltage

VVFB_TOL

TA = 0°C to 85°C

–1.3%

1.3%

tolerance

TA = -40°C to 85°C

–1.6%

1.6%

IVFB

VFB input current

VFB = 0.75 V, absolute value

0.02

0.1

µA

RDischg

VOUT discharge resistance

EN_PSV = 0 V, VOUT = 0.5 V

Ω

ON-TIME TIMER AND INTERNAL SOFT START

TONN

Nominal on time

VLL = 12 V, VOUT = 2.5 V, RTON = 250 kΩ

750

TONF

Fast on time

VLL = 12 V, VOUT = 2.5 V, RTON = 100 kΩ

264

330

396

TONS

Slow on time

VLL = 12 V, VOUT = 2.5 V, RTON = 400 kΩ

1169

TON(MIN)

Minimum on time

VOUT = 0.75 V, RTON = 100 kΩ to 28 V(1)

110

140

VFB = 0.7 V, LL = -0.1 V,

TOFF(MIN)

Minimum off time

440

TRIP = open

Time from EN_PSV > 3 V to VFB regulation

TSS

Internal soft start time

0.82

1.2

1.5

value = 0.735 V

OUTPUT DRIVERS

Source, VVBST-DRVH = 0.5 V

Ω

RDRVH

DRVH resistance

Sink, VDRVH-LL = 0.5 V

1.5

2.5

Ω

Source, VV5DRV-DRVL = 0.5 V

Ω

RDRVL

DRVL resistance

Sink, VDRVL-PGND = 0.5 V

1.5

2.5

Ω

DRVH-low (DRVH = 1 V) to DRVL-high

(DRVL = 4 V), LL = –0.05 V

Dead time

DRVL-low (DRVL = 1 V) to DRVH-high

(DRVH = 4V), LL = –0.05 V

INTERNAL BST DIODE

VFBST

Forward voltage

VV5DRV-VBST, IF = 10 mA, TA = 25°C

0.7

0.8

0.9

IVBSTLK

VBST leakage current

VBST = 34 V, LL = 28 V

0.1

µ A

(1)

Design constraint, ensure actual on-time is larger than the max value (i.e., design RTON such that the min tolerance is 100 kΩ).

TPS51117 Datasheet(PDF) 3 Page - Texas Instruments

TPS51117 Datasheet(HTML) 3 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

Datasheet Download

Link URL