TPS51100

SLUS600B − APRIL 2004 − REVISED NOVEMBER 2005

4

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ELECTRICAL CHARACTERISTICS(continued)

TA = −40°C to 85°C, VVIN = 5 V, VLDOIN and VDDQSNS are connected to 2.5 V (unless otherwise noted)

PARAMETER

UNIT

MAX

TYP

MIN

TEST CONDITIONS

VTTREF OUTPUT

VVTTREF

Output voltage, VTTREF

V

V

VDDQSNS

2

V

VVTTREFTOL25

Output voltage tolerance to

VDDQSNS/2, VTTREF

VVLDOIN = VVDDQSNS = 2.5 V,

IVTTREF < 10 mA

−20

20

mV

VVTTREFTOL18

Output voltage tolerance to

VDDQSNS/2, VTTREF

VVLDOIN = VVDDQSNS = 1.8 V,

IVTTREF < 10 mA

−17

17

mV

IVTTREFOCL

Source current limit, VTTREF

VVVTTREF = 0 V

10

20

30

mA

UVLO/LOGIC THRESHOLD

VVINUV

UVLO threshold voltage, VIN

Wake up

3.4

3.7

4.0

VVINUV

UVLO threshold voltage, VIN

Hysteresis

0.15

0.25

0.35

VIH

High-level input voltage

S3, S5

1.6

V

VIL

Low-level input voltage

S3, S5

0.3

V

VIHYST

Hysteresis voltage

S3, S5

0.2

IILEAK

Logic input leakage current

S2, S5,

TA = 25°C

−1

1

µA

THERMAL SHUTDOWN

TSDN

Thermal shutdown threshold

Shutdown temperature

160

°C

TSDN

Thermal shutdown threshold

Hysteresis

10

°C

TERMINAL FUNCTIONS

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

GND

8

−

Signal ground. Connect to negative terminal of the output capacitor

PGND

4

−

Power ground output for the VTT LDO

S3

7

I

S3 signal input

S5

9

I

S5 signal input

VDDQSNS

1

I

VDDQ sense input

VIN

10

I

5-V power supply

VLDOIN

2

I

Power supply for the VTT LDO and VTTREF output stage

VTT

3

O

Power output for the VTT LDO

VTTREF

6

O

VTT reference output. Connect to GND through 0.1-

µF ceramic capacitor.

VTTSNS

5

I

Voltage sense input for the VTT LDO. Connect to plus terminal of the output capacitor.