TPPM0302

400-mA LOW-DROPOUT REGULATOR

WITH AUXILIARY POWER MANAGEMENT AND POK

SLVS316 – NOVEMBER 2000

4

POST OFFICE BOX 655303

70

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

V(5VCC)/

V(5VAUX)

5-V inputs

4.5

5

5.5

V

I(Q)

Quiescent supply current

From 5VCC or 5VAUX terminals, IL = 0 mA to 400 mA

2.5

5

mA

I(Q)

Quiescent supply current

From 3.3VAUX terminal, IL = 0 A

250

500

µA

IL

Output load current

0.4

A

I(LIMIT)

Output current limit

3.3VOUT = 0 V

1

1.5

A

T(TSD)†

Thermal shutdown

3 3VOUT output shorted to 0 V

150

180

°C

Thys†

Thermal hysteresis

3.3VOUT output shorted to 0 V

15

°C

V(3.3VOUT)

3.3-V output

IL = 400 mA

3.135

3.3

3.465

V

CL

Load capacitance

Minimal ESR to insure stability of regulated output

4.7

µF

Ilkg(REV)

Reverse leakage output

current

Tested for input that is grounded.

3.3VAUX, 5VAUX, or 5VCC = GND, 3.3VOUT = 3.3 V

50

µA

† Design targets only. Not tested in production.

5-V detect

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

V(TO_LO)

Threshold voltage, low

5VAUX or 5VCC

↓

3.85

4.05

4.25

V

V(TO_HI)

Threshold voltage, high

5VAUX or 5VCC

↑

4.1

4.3

4.5

V

auxiliary switch

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

R(SWITCH)

Auxiliary switch resistance

5VAUX = 5VCC = 0 V, 3.3VAUX = 3.3 V, IL = 150 mA

0.4

Ω

∆VO(∆VI)

Line regulation voltage

5VAUX or 5VCC = 4.5 V to 5.5 V

2

mV

∆VO(∆IO)

Load regulation voltage

20 mA < IL < 400 mA

40

mV

VI – VO

Dropout voltage

IL < 400 mA

1

V

Power OK (POK)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

V(TO_POK)

POK threshold voltage

2.67

2.8

2.93

V

VOL

Output low voltage

3.3VOUT = 0

→ 3.3 V and starts POK delay timer

0.4

V

IOH

Output high current

200

µA

VOH

Output high voltage

5K pullup to 3.3VOUT

3.3

V

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

td

Power OK delay

5VCC or 5VAUX or 3.3VAUX > VTO and POK ↑

5

10

ms

† Design targets only. Not tested in production.

PARAMETER

MIN

TYP

MAX

UNIT

R

θJC Thermal impedance, junction-to-case

4.7

°C/W

R

θJA

Thermal impedance, junction-to-ambient

59

°C/W

‡ Based on Texas Instrument recommended board for PowerPAD package.