TL75LP05_技术文档

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SLVS073A − SEPTEMBER 1992 − REVISED AUGUST 1995

• Very Low-Dropout Voltage . . . Less Than

PW PACKAGE

(TOP VIEW)

400 mV at 300 mA

• Standby Mode Reduces Current to a

GND/HEAT SINK

NC

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

Maximum of 150 µA

• Output Regulated to Within 2% Over Full

Temperature Range

• Packaged in Thin Shrink Small-Outline

NC

Package

ENABLE

NC

15 OUTPUT

• Only 10-µF Load Capacitor Required to

14

13

12

11

OUTPUT

NC

Maintain Regulation at I = 300 mA

O

INPUT

NC

description

INPUT

NC

The TL75LPxxQ devices are low-dropout voltage

regulators specifically targeted for use in portable

applications. These devices generate fixed output

voltages at loads of up to 300 mA with only

400-mV dropout over the full temperature range.

GND/HEAT SINK − These terminals have an internal

connection to ground and must be grounded.

NC − No internal connection

The PW package is only available in left-end taped

and reeled (order device TL75LPxxQPWLE).

†

Low-dropout voltage regulators are commonly

used in battery-powered systems such as analog

and digital cellular phones. The TL75LPxx family

of regulators feature a TTL/CMOS-compatible

enable terminal, which can be used to switch the

device into standby mode. This feature reduces

power consumption when the instrument is not

active. Less that 150 µA is required when the unit

is disabled.

typical application schematic

V 2%

O

INPUT

OUTPUT

at 300 mA

TL75LPxxQ

GND/

HEAT SINK

V

BAT

C

= 10 µF

0.1 µF

O

ENABLE

2 V

DISABLE

ENABLE

A concern in many new designs is conservation of

board space and overall reduction in equipment

size. The thin shrink small-outline package

(TSSOP) minimizes board area and reduces

component height. This package has a maximum height of less than 1.1 mm (compared to the 1.75 mm of a

standard 8-pin SO package) and dimensions of only 6.5 mm by 4.4 mm.

All low-dropout regulators require an external capacitor at the output to maintain regulation and stability. To

further reduce board area and cost, the TL75LPxx devices are designed to require a minimum capacitor of only

10 µF. This is 1/10 the typical value used by many other low-dropout regulators. To simplify the task of choosing

a suitable capacitor, TI has included in this datasheet a list of recommended capacitors for use with these

devices.

The TL75LPxxQ devices are characterized for operation over T = −40°C to 125°C.

J

AVAILABLE OPTIONS

PACKAGED DEVICES

V

O

CHIP FORM

(Y)

T

J

TSSOP

(PW)

MIN

TYP

MAX

4.75

4.9

4.85

5

4.95

5.1

TL75LP48QPWLE

TL75LP05QPWLE

TL75LP08QPWLE

TL75LP10QPWLE

TL75LP12QPWLE

TL75LP48Y

TL75LP05Y

TL75LP08Y

TL75LP10Y

TL75LP12Y

−40°C to 125°C

7.84

9.8

8

8.16

10.2

12.24

10

12

11.76

The PW package is available only in tape and reel. Chip forms are tested at 25°C.

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Copyright  1995, Texas Instruments Incorporated

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ꢟ ꢣ ꢠ ꢟꢘ ꢙꢬ ꢛꢚ ꢞ ꢦꢦ ꢤꢞ ꢜ ꢞ ꢝ ꢣ ꢟ ꢣ ꢜ ꢠ ꢨ

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3−1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443

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SLVS073A − SEPTEMBER 1992 − REVISED AUGUST 1995

functional block diagram

INPUT

Current

Limiting

ENABLE

Enable

OUTPUT

−

+

28 V

Bandgap

Overvoltage/

Thermal

Shutdown

GND/HEAT SINK

TL75LPxxY chip information

This chip, when properly assembled, displays characteristics similar to the TL75LPxx. Thermal compression

or ultrasonic bonding can be used on the doped aluminum bonding pads. The chip can be mounted with

conductive epoxy or a gold-silicon preform.

(1)

(5)

(4)

BONDING PAD ASSIGNMENTS

(5)

OUTPUT

INPUT

TL75LPxxY

(6)

OUTPUT

SENSE

(3)

(2)

(4)

(6)

ENABLE POWER SIGNAL

GND GND

CHIP THICKNESS: 11 MILS TYPICAL

BONDING PADS: 7X7 MILS MINIMUM

max = 150°C

92

T

J

TOLERANCES ARE 10%.

ALL DIMENSIONS ARE IN MILS.

(3)

(1)

(2)

NOTE A. NOTE: SIGNAL GND and POWER

GND must be tied together as close to

device as possible. OUTPUT and

OUTPUT SENSE should be tied

together.

123

3−2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

^{POST OFFICE BOX 1443}• HOUSTON, TEXAS 77251−1443

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SLVS073A − SEPTEMBER 1992 − REVISED AUGUST 1995

†

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

Supply voltage, V , (See Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 V

CC

Output current, I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 mA

O

Operating virtual junction temperature range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 150°C

J

Continuous total power dissipation (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table

Storage temperature range, T

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C

stg

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. All voltage values are with respect to network terminal ground.

2. Refer to Figures 1 and 2 to avoid exceeding the design maximum virtual junction temperature; these ratings should not be exceeded.

Due to variation in individual device electrical characteristics and thermal resistance, the built-in thermal overload protection may

be activated at power levels slightly above or below the rated dissipation.

DISSIPATION RATING TABLE

POWER RATING

AT

T ≤ 25°C

POWER RATING

DERATING FACTOR

ABOVE T = 25°C

T = 70°C

T = 85°C

T = 125°C

PACKAGE

POWER RATING POWER RATING POWER RATING

T

828 mW

4032 mW

2475 mW

6.62 mW/°C

32.2 mW/°C

19.8 mW/°C

530 mW

2583 mW

1584 mW

431 mW

2100 mW

1287 mW

166 mW

812 mW

495 mW

A

PW

T

C

‡

P

‡

R

is the thermal resistance between the junction and the device pin. To determine the virtual junction temperature (T ) relative to the device

J

θJP

pin temperature, the following calculations should be used: T = P x R

is the device pin temperature at the point of contact to the printed wiring board. The R

+ T , where P is the internal power dissipation of the device and T

J

D

θJP

P

D

P

for the TL75LPxx series is 50.5°C/W.

θJP

MAXIMUM CONTINUOUS DISSIPATION

vs

FREE-AIR TEMPERATURE

CASE TEMPERATURE

2400

2200

2000

1800

1600

1400

1200

1000

800

4800

4400

4000

3600

3200

2800

2400

2000

1600

1200

800

600

R

= 31°C/W

θJC

400

200

400

R

= 151°C/W

θJA

0

25

50

75

100

125

150

25

50

75

100

125

150

T

A

− Free-Air Temperature − °C

T

C

− Case Temperature − °C

Figure 1

Figure 2

3−3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

^{POST OFFICE BOX 1443}• HOUSTON, TEXAS 77251−1443

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SLVS073A − SEPTEMBER 1992 − REVISED AUGUST 1995

recommended operating conditions

MIN

5.15

5.3

8.4

10.4

12.5

2.0

0

MAX

23.0

15.0

0.8

UNIT

TL75LP48

TL75LP05

TL75LP08

TL75LP10

TL75LP12

Input voltage, V

V

I

High-level input voltage, ENABLE, V

IH

V

Low-level input voltage, ENABLE, V

IL

Output current range, I

5

300

mA

°C

O

Operating virtual junction temperature range, T

−40

125

J

electrical characteristics over operating virtual junction temperature range, V = 10 V, I = 300 mA,

I

O

ENABLE = 0 V (unless otherwise noted)

TL75LP48Q

†

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

4.85

10

MAX

Output voltage

V = 5.35 V to 10 V

4.75

4.95

25

V

I

Input voltage regulation

Ripple rejection

V = 5.35 V to 10 V,

T

J

= 25°C

mV

dB

mV

I

V = 5.6 V to 15.6 V,

f = 120 Hz, T = 25°C

50

55

I

J

Output voltage regulation

I

= 5 mA to 300 mA, T = 25°C

12

30

0.2

0.3

0.4

O

J

= 100 mA

= 200 mA

= 300 mA

0.12

0.17

0.22

500

2.5

4

Dropout voltage

V

Output noise voltage

f = 10 Hz to 100 kHz, T = 25°C

µV

J

I

= 10 mA

4

10

20

30

25

6

O

= 100 mA

= 200 mA

= 300 mA

Bias current

mA

6

9

High-level input current, ENABLE

Low-level input current, ENABLE

Standby current

ENABLE = 0.8 V

ENABLE = 2 V

7

µA

0.05

100

150

†

Pulse-testing techniques maintain the virtual junction temperature as close to the ambient temperature as possible. Thermal effects must be taken

into account separately. All characteristics are measured with a 0.1-µF capacitor across the input and a 10-µF capacitor with equivalent series

resistance within the guidelines shown in Figures 3 and 4 on the output. All measurements are taken with a tantalum electrolytic capacitor.

Although not normally recommended, an aluminum electrolytic capacitor can be used. Attention must be given its ESR value, particularly at low

temperatures.

3−4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

^{POST OFFICE BOX 1443}• HOUSTON, TEXAS 77251−1443

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SLVS073A − SEPTEMBER 1992 − REVISED AUGUST 1995

electrical characteristics over operating virtual junction temperature range, V = 10 V, I = 300 mA,

I

O

ENABLE = 0 V (unless otherwise noted)

TL75LP05Q

†

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

5

MAX

Output voltage

V = 5.5 V to 10 V

4.9

5.1

25

V

I

Input voltage regulation

Ripple rejection

V = 5.5 V to 10 V,

T = 25°C

J

10

mV

dB

mV

I

V = 6 V to 16 V,

f = 120 Hz, T = 25°C

50

55

I

J

Output voltage regulation

I

= 5 mA to 300 mA, T = 25°C

12

30

0.2

0.3

0.4

O

J

= 100 mA

= 200 mA

= 300 mA

0.12

0.17

0.22

500

2.5

4

Dropout voltage

V

Output noise voltage

f = 10 Hz to 100 kHz, T = 25°C

µV

J

I

= 10 mA

4

10

20

30

25

6

O

= 100 mA

= 200 mA

= 300 mA

Bias current

mA

6

9

High-level input current, ENABLE

Low-level input current, ENABLE

Standby current

ENABLE = 0.8 V

ENABLE = 2 V

7

µA

0.05

100

150

†

Pulse-testing techniques maintain the virtual junction temperature as close to the ambient temperature as possible. Thermal effects must be taken

into account separately. All characteristics are measured with a 0.1-µF capacitor across the input and a 10-µF capacitor with equivalent series

resistance within the guidelines shown in Figures 3 and 4 on the output. All measurements are taken with a tantalum electrolytic capacitor.

Although not normally recommended, an aluminum electrolytic capacitor can be used. Attention must be given its ESR value, particularly at low

temperatures.

electrical characteristics over operating virtual junction temperature range, V = 10 V, I = 300 mA,

I

O

ENABLE = 0 V (unless otherwise noted)

TL75LP08Q

†

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

8

MAX

Output voltage

V = 8.6 V to 15 V

7.84

8.16

40

V

I

Input voltage regulation

Ripple rejection

V = 8.6 V to 15 V,

T = 25°C

J

12

mV

dB

mV

I

V = 9 V to 19 V,

f = 120 Hz, T = 25°C

50

55

I

J

Output voltage regulation

I

= 5 mA to 300 mA, T = 25°C

12

40

0.2

0.3

0.4

O

J

= 100 mA

= 200 mA

= 300 mA

0.12

0.17

0.22

500

2.5

4

Dropout voltage

V

Output noise voltage

f = 10 Hz to 100 kHz, T = 25°C

µV

J

I

= 10 mA

4

10

20

30

25

6

O

= 100 mA

= 200 mA

= 300 mA

Bias current

mA

6

9

High-level input current, ENABLE

Low-level input current, ENABLE

Standby current

ENABLE = 0.8 V

ENABLE = 2 V

7

µA

0.05

100

150

†

Pulse-testing techniques maintain the virtual junction temperature as close to the ambient temperature as possible. Thermal effects must be taken

into account separately. All characteristics are measured with a 0.1-µF capacitor across the input and a 10-µF capacitor with equivalent series

resistance within the guidelines shown in Figures 3 and 4 on the output. All measurements are taken with a tantalum electrolytic capacitor.

Although not normally recommended, an aluminum electrolytic capacitor can be used. Attention must be given its ESR value, particularly at low

temperatures.

3−5

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

^{POST OFFICE BOX 1443}• HOUSTON, TEXAS 77251−1443

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SLVS073A − SEPTEMBER 1992 − REVISED AUGUST 1995

electrical characteristics over operating virtual junction temperature range, V = 14 V, I = 300 mA,

I

O

ENABLE = 0 V (unless otherwise noted)

TL75LP10Q

†

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

10

MAX

Output voltage

V = 10.6 V to 17 V

9.8

10.2

43

V

I

Input voltage regulation

Ripple rejection

V = 10.6 V to 17 V,

T

J

= 25°C

15

mV

dB

mV

I

V = 11 V to 21 V,

f = 120 Hz, T = 25°C

50

55

I

J

Output voltage regulation

I

= 5 mA to 300 mA, T = 25°C

15

50

0.2

0.3

0.4

O

J

= 100 mA

= 200 mA

= 300 mA

0.12

0.17

0.22

1000

2.5

4

Dropout voltage

V

Output noise voltage

f = 10 Hz to 100 kHz, T = 25°C

µV

J

I

= 10 mA

4

10

20

30

25

6

O

= 100 mA

= 200 mA

= 300 mA

Bias current

mA

6

9

High-level input current, ENABLE

Low-level input current, ENABLE

Standby current

ENABLE = 0.8 V

ENABLE = 2 V

7

µA

0.05

100

150

†

Pulse-testing techniques maintain the virtual junction temperature as close to the ambient temperature as possible. Thermal effects must be taken

into account separately. All characteristics are measured with a 0.1-µF capacitor across the input and a 10-µF capacitor with equivalent series

resistance within the guidelines shown in Figures 3 and 4 on the output. All measurements are taken with a tantalum electrolytic capacitor.

Although not normally recommended, an aluminum electrolytic capacitor can be used. Attention must be given its ESR value, particularly at low

temperatures.

electrical characteristics over operating virtual junction temperature range, V = 14 V, I = 300 mA,

I

O

ENABLE = 0 V (unless otherwise noted)

TL75LP12Q

†

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

MAX

Output voltage

V = 12.7 V to 18 V

I

11.76

12 12.24

V

Input voltage regulation

Ripple rejection

V = 12.7 V to 18 V,

T

= 25°C

15

55

43

mV

dB

mV

I

J

V = 13 V to 23 V,

I

f = 120 Hz, T = 25°C

50

J

Output voltage regulation

I

O

I

O

I

O

I

O

= 5 mA to 300 mA, T = 25°C

15

60

0.2

0.3

0.4

J

= 100 mA

= 200 mA

= 300 mA

0.12

0.17

0.22

1000

2.5

4

Dropout voltage

V

Output noise voltage

f = 10 Hz to 100 kHz, T = 25°C

µV

J

I

O

I

O

I

O

I

O

= 10 mA

4

10

20

30

25

6

= 100 mA

= 200 mA

= 300 mA

Bias current

mA

6

9

High-level input current, ENABLE

Low-level input current, ENABLE

Standby current

ENABLE = 0.8 V

ENABLE = 2 V

7

µA

0.05

100

150

†

Pulse-testing techniques maintain the virtual junction temperature as close to the ambient temperature as possible. Thermal effects must be taken

into account separately. All characteristics are measured with a 0.1-µF capacitor across the input and a 10-µF capacitor with equivalent series

resistance within the guidelines shown in Figures 3 and 4 on the output. All measurements are taken with a tantalum electrolytic capacitor.

Although not normally recommended, an aluminum electrolytic capacitor can be used. Attention must be given its ESR value, particularly at low

temperatures.

3−6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

^{POST OFFICE BOX 1443}• HOUSTON, TEXAS 77251−1443

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SLVS073A − SEPTEMBER 1992 − REVISED AUGUST 1995

electrical characteristics at V = 10 V, I = 300 mA, ENABLE = 0 V, T = 25°C (unless otherwise noted)

I

O

J

TL75LP48Y

†

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

4.85

10

MAX

Output voltage

V

Input voltage regulation

Ripple rejection

mV

dB

mV

V

f = 120 Hz

55

Output voltage regulation

Dropout voltage

12

0.22

500

9

Output noise voltage

Bias current

f = 10 Hz to 100 kHz

µV

mA

µA

High-level input current, ENABLE

Low-level input current, ENABLE

Standby current

ENABLE = 0.8 V

ENABLE = 2 V

7

0.05

100

†

Pulse-testing techniques maintain the virtual junction temperature as close to the ambient temperature as possible. Thermal effects must be taken

into account separately. All characteristics are measured with a 0.1-µF capacitor across the input and a 10-µF capacitor with equivalent series

resistance within the guidelines shown in Figures 3 and 4 on the output. All measurements are taken with a tantalum electrolytic capacitor.

Although not normally recommended, an aluminum electrolytic capacitor can be used. Attention must be given its ESR value, particularly at low

temperatures.

electrical characteristics at V = 10 V, I = 300 mA, ENABLE = 0 V, T = 25°C (unless otherwise noted)

I

O

J

TL75LP05Y

†

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

5

MAX

Output voltage

V

Input voltage regulation

Ripple rejection

10

mV

dB

mV

V

f = 120 Hz

55

Output voltage regulation

Dropout voltage

12

0.22

500

9

Output noise voltage

Bias current

f = 10 Hz to 100 kHz

µV

mA

µA

High-level input current, ENABLE

Low-level input current, ENABLE

Standby current

ENABLE = 0.8 V

ENABLE = 2 V

7

0.05

100

†

Pulse-testing techniques maintain the virtual junction temperature as close to the ambient temperature as possible. Thermal effects must be taken

into account separately. All characteristics are measured with a 0.1-µF capacitor across the input and a 10-µF capacitor with equivalent series

resistance within the guidelines shown in Figures 3 and 4 on the output. All measurements are taken with a tantalum electrolytic capacitor.

Although not normally recommended, an aluminum electrolytic capacitor can be used. Attention must be given its ESR value, particularly at low

temperatures.

3−7

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

^{POST OFFICE BOX 1443}• HOUSTON, TEXAS 77251−1443

ꢀ

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ꢊ

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ꢇ

ꢄ

ꢇ

ꢈ

ꢍ

ꢈ

ꢉ

ꢑ

ꢉ

ꢊ

ꢀ

ꢊ

ꢋ

ꢇ

ꢋ

ꢉ

ꢒ

ꢉ

ꢈ

ꢍ

ꢈ

ꢕ

ꢁ ꢂ

ꢍ

ꢁ

ꢀ

ꢓ

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ꢇ

ꢊ

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ꢔ

ꢑ

ꢁ

ꢓ

ꢀ

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ꢊ

ꢈ

SLVS073A − SEPTEMBER 1992 − REVISED AUGUST 1995

electrical characteristics at V = 10 V, I = 300 mA, ENABLE = 0 V, T = 25°C (unless otherwise noted)

I

O

J

TL75LP08Y

†

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

8

MAX

Output voltage

V

Input voltage regulation

Ripple rejection

12

mV

dB

mV

V

f = 120 Hz

55

Output voltage regulation

Dropout voltage

12

0.22

500

9

Output noise voltage

Bias current

f = 10 Hz to 100 kHz

µV

mA

µA

High-level input current, ENABLE

Low-level input current, ENABLE

Standby current

ENABLE = 0.8 V

ENABLE = 2 V

7

0.05

100

†

Pulse-testing techniques maintain the virtual junction temperature as close to the ambient temperature as possible. Thermal effects must be taken

into account separately. All characteristics are measured with a 0.1-µF capacitor across the input and a 10-µF capacitor with equivalent series

resistance within the guidelines shown in Figures 3 and 4 on the output. All measurements are taken with a tantalum electrolytic capacitor.

Although not normally recommended, an aluminum electrolytic capacitor can be used. Attention must be given its ESR value, particularly at low

temperatures.

electrical characteristics at V = 14 V, I = 300 mA, ENABLE = 0 V, T = 25°C (unless otherwise noted)

I

O

J

TL75LP10Y

†

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

10

MAX

Output voltage

V

Input voltage regulation

Ripple rejection

15

mV

dB

mV

V

f = 120 Hz

55

Output voltage regulation

Dropout voltage

15

0.22

1000

9

Output noise voltage

Bias current

f = 10 Hz to 100 kHz

µV

mA

µA

High-level input current, ENABLE

Low-level input current, ENABLE

Standby current

ENABLE = 0.8 V

ENABLE = 2 V

7

0.05

100

†

Pulse-testing techniques maintain the virtual junction temperature as close to the ambient temperature as possible. Thermal effects must be taken

into account separately. All characteristics are measured with a 0.1-µF capacitor across the input and a 10-µF capacitor with equivalent series

resistance within the guidelines shown in Figures 3 and 4 on the output. All measurements are taken with a tantalum electrolytic capacitor.

Although not normally recommended, an aluminum electrolytic capacitor can be used. Attention must be given its ESR value, particularly at low

temperatures.

3−8

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

^{POST OFFICE BOX 1443}• HOUSTON, TEXAS 77251−1443

ꢀ

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ꢊ

ꢈ

ꢕ

ꢀ ꢁꢂ ꢃ ꢁ ꢄꢅ ꢅ ꢌꢇ ꢈꢉ ꢊ ꢋ

ꢁ

ꢍ

ꢎ

ꢏ

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ꢊ

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ꢄ

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ꢑ

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ꢓ

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ꢉ

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ꢊ

ꢉ

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ꢀ

ꢍ

SLVS073A − SEPTEMBER 1992 − REVISED AUGUST 1995

electrical characteristics at V = 14 V, I = 300 mA, ENABLE = 0 V, T = 25°C (unless otherwise noted)

I

O

J

TL75LP12Y

MIN TYP

11.76 12 12.24

†

PARAMETER

TEST CONDITIONS

UNIT

MAX

Output voltage

V

Input voltage regulation

Ripple rejection

15

55

43

mV

dB

mV

V

f = 120 Hz

Output voltage regulation

Dropout voltage

12

60

0.22

500

9

0.4

Output noise voltage

Bias current

f = 10 Hz to 100 kHz

µV

mA

µA

30

25

High-level input current, ENABLE

Low-level input current, ENABLE

Standby current

ENABLE = 0.8 V

ENABLE = 2 V

7

0.05

100

6

150

†

Pulse-testing techniques maintain the virtual junction temperature as close to the ambient temperature as possible. Thermal effects must be taken

into account separately. All characteristics are measured with a 0.1-µF capacitor across the input and a 10-µF capacitor with equivalent series

resistance within the guidelines shown in Figures 3 and 4 on the output. All measurements are taken with a tantalum electrolytic capacitor.

Although not normally recommended, an aluminum electrolytic capacitor can be used. Attention must be given its ESR value, particularly at low

temperatures.

3−9

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

^{POST OFFICE BOX 1443}• HOUSTON, TEXAS 77251−1443

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ꢈ

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ꢍ

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ꢀ

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ꢇꢊ

ꢉ

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ꢀ

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ꢊ

ꢈ

SLVS073A − SEPTEMBER 1992 − REVISED AUGUST 1995

PARAMETER MEASUREMENT INFORMATION

The TL75LPxx series are low-dropout voltage regulators. This means that the capacitance is important to the

performance of the regulator because it is a vital part of the control loop. The capacitor value and the equivalent series

resistance (ESR) both affect the control loop and must be defined for the load range and the temperature range.

Figures 3 and 4 can establish the capacitance value and ESR range for optimum regulator performance.

Figure 3 shows the recommended range of ESR, measured at 120 Hz, for a given load with a 10-µF capacitor on the

output. In addition, it shows a maximum ESR limit of 2 Ω and a load-dependent minimum ESR limit.

For applications with varying loads, the lightest load condition should be chosen since it is the worst case. Figure 4

shows the relationship of the reciprocal of ESR to the square root of the capacitance with a minimum capacitance

limit of 10 µF and a maximum ESR limit of 2 Ω. Figure 4 establishes the amount that the minimum ESR limit of Figure

3 can be adjusted for different capacitor values. For example, when the minimum load needed is 200 mA,

Figure 3 suggests an ESR range of 0.8 Ω to 2 Ω for 10 µF. Figure 4 shows that changing the capacitor from

10 µF to 400 µF can change the ESR minimum by greater than 3/0.5 (or 6). Therefore, the new minimum ESR value

is 0.8/6 (or 0.13 Ω). This now allows an ESR range of 0.13 Ω to 2 Ω. This expanded ESR range is achieved by using

a larger capacitor at the output. For better stability in low-current applications, it is recommended that a small

resistance be placed in series with the capacitor (see Table 1) so that the ESR better approximates those in

Figures 3 and 4.

∆I

L

Table 1. Compensations for Increased Stability at Low Currents

Applied

Load

Current

ESR

TYP

PART

NUMBER

ADDITIONAL

RESISTANCE

MANUFACTURER CAPACITANCE

Load

Voltage

AVX

15 µF

33 µF

0.9 Ω

0.6 Ω

TAJB156M010S

1 Ω

∆V

L

∆V = ∆I × ESR

L

KEMET

T491D336M010AS

0.5 Ω

OUTPUT CAPACITOR

EQUIVALENT SERIES RESISTANCE

OUTPUT CAPACITOR

STABILITY

vs

LOAD CURRENT

EQUIVALENT SERIES RESISTANCE

0.04

0.035

0.03

3

2.8

2.6

2.4

2.2

2

C

= 10 µF

L

I

Not Recommended

Potential Instability

Recommended Min ESR

This Region Not

Recommended

for Operation

C = 0.1 µF

1000 µF

Region of

Best Stability

Max ESR Boundary

0.025

0.02

1.8

1.6

1.4

1.2

1

400 µF

Region of Best Stability

200 µF

0.015

0.01

Min ESR

Boundary

0.8

0.6

0.4

0.2

100 µF

Potential Instability Region

0.005

0

22 µF

10 µF

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

0.1

0.2

0.3

0.4

0.5

1/ESR

I

L

− Load Current − A

Figure 3

Figure 4

3−10

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

^{POST OFFICE BOX 1443}• HOUSTON, TEXAS 77251−1443

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SLVS073A − SEPTEMBER 1992 − REVISED AUGUST 1995

TYPICAL CHARACTERISTICS

Table of Graphs

FIGURE

Output voltage

Input current

vs Input voltage

5

6

I

= 10 mA

O

= 100 mA vs Input voltage

vs Output current

7

O

Dropout voltage

8

Quiescent current

vs Output current

9

Short-circuit protection conditions output voltage

Load transient response

vs Output current

10

11

12

Line transient response

3−11

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

^{POST OFFICE BOX 1443}• HOUSTON, TEXAS 77251−1443

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ꢋ

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ꢋ

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ꢉ

ꢈ

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ꢈ

ꢕ

ꢁ ꢂ

ꢍ

ꢁ

ꢀ

ꢓ

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ꢈ

SLVS073A − SEPTEMBER 1992 − REVISED AUGUST 1995

TYPICAL CHARACTERISTICS

INPUT CURRENT

vs

OUTPUT VOLTAGE

vs

INPUT VOLTAGE

200

180

14

12

I

T

= 10 mA

= 25°C

O

J

I

T

= 10 mA

= 25°C

O

J

TL75LP12

TL75LP10

160

140

10

8

TL75LP08

120

100

TL75LP08

6

4

TL75LP05

TL75LP48

80

60

40

TL75LP10

TL75LP05

TL75LP12

2

0

20

0

TL75LP48

0

2

4

6

8

10

12

14

0

2

4

6

8

10

12

14

V − Input Voltage − V

I

V − Input Voltage − V

I

Figure 5

Figure 6

DROPOUT VOLTAGE

vs

INPUT CURRENT

vs

OUTPUT CURRENT

INPUT VOLTAGE

250

225

200

350

300

I

T

= 100 mA

= 25°C

O

J

T

J

= 25°C

250

200

TL75LP08

175

150

125

100

75

TL75LP10

TL75LP05

150

100

TL75LP12

TL75LP48

50

0

50

0

2

4

6

8

10

12

14

0

50

100

150

200

250

300

V − Input Voltage − V

I

O

− Output Current − mA

Figure 7

Figure 8

3−12

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

^{POST OFFICE BOX 1443}• HOUSTON, TEXAS 77251−1443

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SLVS073A − SEPTEMBER 1992 − REVISED AUGUST 1995

TYPICAL CHARACTERISTICS

TL75LP05

SHORT-CIRCUIT PROTECTION CONDITIONS

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

QUIESCENT CURRENT

vs

OUTPUT CURRENT

6

5

4

3

2

1

0

12

10

8

T

= 25°C

J

I

V = 14 V

T

J

= 25°C

6

4

T

J

= 125°C

T

J

= 40°C

2

0

0.75 0.85 0.95 1.05 1.15 1.25 1.35 1.45 1.55

0

20

40

60

80

100 120 140 160

I

O

− Output Current − mA

I

O

− Output Current − A

Figure 9

Figure 10

LOAD TRANSIENT RESPONSE

LINE TRANSIENT RESPONSE

200

V

) = V + 1 V

I(NOM

O

ESR = 2

= 20 mA

100

I

C

L

= 10 µF

= 25°C

L

0

T

A

−100

V

) = V + 1 V

I(NOM

O

ESR = 2

= 10 µF

−200

150

C

L

T

= 25°C

A

100

50

0

−50

0

50 100 150 200 250

t − Time − µs

300 350

0

50 100 150 200 250 300 350 400

t − Time − µs

Figure 11

Figure 12

3−13

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^{POST OFFICE BOX 1443}• HOUSTON, TEXAS 77251−1443

ꢕ

3−14

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

^{POST OFFICE BOX 1443}• HOUSTON, TEXAS 77251−1443

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型号：	TL75LP05
厂家：	TEXAS INSTRUMENTS
描述：	LOW-DROPOUT VOLTAGE REGULATORS 低压差稳压器稳压器
文件：	总15页 (文件大小：237K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TL75LP05 [TI]

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