TPS60251RTW datasheet(4/28 Pages) TI

Part #	TPS60251RTW

Description	HIGH EFFICIENCY CHARGE PUMP FOR 7 WLEDs WITH I2C INTERFACE

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Manufacturer	TI [Texas Instruments]

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PIN ASSIGNMENTS

6

12

18

24

1

2

3

4

5

7

8

9

10

11

13

14

15

16

17

19

20

21

22

23

SDAT

DS1 DS2 DM 5

ENA

SCLK

VIO

NC

GND

NC

DM1

DM 2

DM3

DM4

IS

GND

C1+

C2+

C2-

C1-

VOUT

VIN

QFN24-PINRTW

4mmx4mm

(TOP VIEW)

TPS60251

SLVS767 – APRIL 2007

ELECTRICAL CHARACTERISTICS (continued)

V

I = 3.5 V, TA = –40°C to 85°C, RIS = 562 kΩ, typical values are at TA = 25°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

tsu(DATA)

Data input setup time

100

ns

tsu(STO)

STOP condition setup time

600

ns

t(BUF)

Bus free time

1300

ns

I2C COMPATIBLE INTERFACE VOLTAGE SPECIFICATION (SCLK, SDAT, VIO)

VIO

Serial bus voltage level

1.8

4.5

V

VIL

Low-leveI input voltage

3.0V

≤ V

I ≤ 6.0V

0

0.45

×V

IO

V

VIH

High-level input voltage

3.0V

≤ V

I ≤ 6.0V

0.87

×V

IO

V

VOL

Low-level output voltage

ILOAD = 2 mA

0.4

V

TERMINAL FUNCTIONS

TERMINAL

I/O

DESCRIPTION

NAME

NO.

SCLK

1

I

I2C Interface

SDAT

2

I/O

I2C Interface

Hardware enable/disable pin. Connect this pin high to enable the device. Connect this pin low to disable

ENA

3

I

the device. Do not leave this pin unconnected.

DS1

4

I

Current sink input. Connect the cathode of one of the sub display white LEDs to this pin.

DS2

5

I

DM5

6

I

Current sink input. Connect the cathode of the aux display or the 5th main display white LED to this pin.

I/O Voltage input (1.8V). Connect an input voltage supply of 1.8V to VIN to set the logic levels for the I2C

VIO

7

I

interface.

NC

8, 11, 12

–

No connection

GND

9, 10, 18

–

Ground

DM1

13

I

DM2

14

I

Current sink input. Connect the cathode of one of the main display white LED to this pin.

DM3

15

I

DM4

16

I

4

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