TPS77901, TPS77918, TPS77925, TPS77930

250-mA LDO REGULATOR WITH INTEGRATED RESET IN A MSOP8 PACKAGE

SLVS283D – MARCH 2000 – REVISED OCTOBER 2000

7

POST OFFICE BOX 655303

125

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Minimum input voltage for valid RESET

I(RESET) = 300 µA

1.1

V

Trip threshold voltage

VO decreasing

92%

98%

VO

Reset

Hysteresis voltage

Measured at VO

0.5%

VO

Reset

Output low voltage

VI = 2.7 V,

I(RESET) = 1 mA

0.15

0.4

V

Leakage current

V(RESET) = 5 V

1

µA

RESET time-out delay

220

ms

VDO

Dropout voltage (see Note 5)

3 V Output

IO = 250 mA,

TJ = 25°C

250

mV

VDO

Dropout voltage (see Note 5)

3 V Output

IO = 250 mA

475

mV

NOTE 5: IN voltage equals VO(typ) – 100 mV; 1.8 V, and 2.5 V dropout voltage limited by input voltage range limitations (i.e., 3.3 V input voltage

needs to drop to 3.2 V for purpose of this test).

TYPICAL CHARACTERISTICS

Table of Graphs

FIGURE

VO

Output voltage

vs Output current

2, 3

VO

Output voltage

vs Junction temperature

4, 5

Ground current

vs Junction temperature

6

Power supply rejection ratio

vs Frequency

7

Output spectral noise density

vs Frequency

8

Zo

Output impedance

vs Frequency

9

VDO

Dropout voltage

vs Input voltage

10

VDO

Dropout voltage

vs Junction temperature

11

Line transient response

12, 14

Load transient response

13, 15

Output voltage and enable pulse

vs Time (at startup)

16

Equivalent series resistance

vs Output current

18 – 21