LT3007ITS8-3.3#PBF_技术文档

LT3007 Series

µA I , 20mA, 45V

3

Q

Low Dropout Fault Tolerant

Linear Regulators

DESCRIPTION

The LT^®3007 series are micropower, low dropout voltage

(LDO) linear regulators. The devices supply 20mA output

current with a dropout voltage of 300mV. No-load quies-

cent current is 3µA. Ground pin current remains at less

than 5% of output current as load increases. In shutdown,

quiescent current is less than 1µA.

FEATURES

n

FMEA Fault Tolerant:

Output Stays at or Below Regulation Voltage During

Adjacent Pin Short or if a Pin Is Left Floating

n

Ultralow Quiescent Current: 3µA

n

Input Voltage Range: 2.0V to 45V

n

Output Current: 20mA

n

Dropout Voltage: 300mV

The LT3007 regulators optimize stability and transient

response with low ESR ceramic capacitors, requiring a

minimum of only 2.2µF. The regulators do not require

the addition of ESR as is common with other regulators.

Internal protection circuitry includes current limiting,

thermal limiting, reverse-battery protection and reverse-

current protection.

n

Adjustable Output (V

= V

= 600mV)

ADJ

OUT(MIN)

n

Fixed Output Voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V

Output Tolerance: ±2% Over Load, Line and

Temperature

n

Stable with Low ESR, Ceramic Output Capacitors

(2.2µF Minimum)

Shutdown Current: <1µA

Current Limit Protection

Reverse-Battery Protection

Thermal Limit Protection

TSOT-23 Package

n

The LT3007 series are ideal for applications that require

moderate output drive capability coupled with ultralow

standby power consumption. The device is available in

fixed output voltages of 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and

5V, andanadjustableversionwithanoutputvoltagerange

of 0.6V to 44.5V. The LT3007 is available in the thermally

enhanced 8-lead TSOT-23 package.

APPLICATIONS

n

Automotive

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered and ThinSOT is a

trademark of Linear Technology Corporation. All other trademarks are the property of their

respective owners.

n

Low Current Battery-Powered Systems

n

Keep-Alive Power Supplies

Remote Monitoring

Utility Meters

n

Low Power Industrial Applications

Dropout Voltage/Quiescent Current

TYPICAL APPLICATION

500

450

400

350

300

250

200

150

100

50

6

5

4

3

2

1

0

I

= 20mA

LOAD

3.3V, 20mA Supply with Shutdown

DROPOUT

VOLTAGE

V

OUT

3.3V

IN

OUT

LT3007-3.3

V

IN

20mA

3.8V TO

45V

2.2µF

1µF

I

Q

SHDN SENSE

GND

3007 TA01a

0

–50 –25

0

25 50 75 100 125 150

TEMPERATURE (°C)

3007 TA01b

3007fa

1

For more information www.linear.com/LT3007

LT3007 Series

ABSOLUTE MAXIMUM RATINGS

PIN CONFIGURATION

(Note 1)

IN Pin Voltage ........................................................ ±50V

OUT Pin Voltage..................................................... ±50V

Input-to-Output Differential Voltage....................... ±50V

ADJ Pin Voltage ..................................................... ±50V

SENSE Pin Voltage................................................. ±50V

SHDN Pin Voltage (Note 8) .................................... ±50V

Output Short-Circuit Duration.......................... Indefinite

Operating Junction Temperature Range (Notes 2, 4)

E-, I-Grades .......................................–40°C to 125°C

H-Grade .............................................–40°C to 150°C

Storage Temperature Range ..................–65°C to 150°C

Lead Temperature: Soldering, 10 sec....................300°C

LT3007-ADJUSTABLE

TOP VIEW

8

7

6

5

ADJ

OUT

NC

SHDN

GND

1

2

3

4

IN

TS8 PACKAGE

8-LEAD PLASTIC TSOT-23

T

= 150°C, θ = 65°C/W TO 85°C/W*

JMAX

JA

LT3007-FIXED OUTPUTS

TOP VIEW

8

7

6

5

SENSE

OUT

NC

SHDN

GND

1

2

3

4

IN

TS8 PACKAGE

8-LEAD PLASTIC TSOT-23

T

= 125°C, θ = 65°C/W TO 85°C/W*

JA

JMAX

* See the Applications Information Section.

ORDER INFORMATION

LEAD FREE FINISH

LT3007ETS8#PBF

TAPE AND REEL

PART MARKING*

LTGJW

LTGKB

LTGKD

LTGJZ

PACKAGE DESCRIPTION

8-Lead Plastic TSOT-23

TEMPERATURE RANGE

–40°C to 125°C

–40°C to 150°C

–40°C to 125°C

LT3007ETS8#TRPBF

LT3007ITS8#PBF

LT3007ITS8#TRPBF

LT3007HTS8#PBF

LT3007HTS8#TRPBF

LT3007ETS8-1.2#TRPBF

LT3007ITS8-1.2#TRPBF

LT3007ETS8-1.5#TRPBF

LT3007ITS8-1.5#TRPBF

LT3007ETS8-1.8#TRPBF

LT3007ITS8-1.8#TRPBF

LT3007ETS8-2.5#TRPBF

LT3007ITS8-2.5#TRPBF

LT3007ETS8-3.3#TRPBF

LT3007ITS8-3.3#TRPBF

LT3007ETS8-5#TRPBF

LT3007ITS8-5#TRPBF

LT3007ETS8-1.2#PBF

LT3007ITS8-1.2#PBF

LT3007ETS8-1.5#PBF

LT3007ITS8-1.5#PBF

LT3007ETS8-1.8#PBF

LT3007ITS8-1.8#PBF

LT3007ETS8-2.5#PBF

LT3007ITS8-2.5#PBF

LT3007ETS8-3.3#PBF

LT3007ITS8-3.3#PBF

LT3007ETS8-5#PBF

LT3007ITS8-5#PBF

LTGJZ

LTGJX

LTGKC

LTGJY

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/

3007fa

2

For more information www.linear.com/LT3007

LT3007 Series

ELECTRICAL CHARACTERISTICS ^Thel denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T_J= 25°C. (Note 2)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

l

Operating Voltage

2

45

V

Regulated Output Voltage

LT3007-1.2: V = 2V, I

= 100µA

< 20mA

1.188

1.176

1.2

1.212

1.224

V

IN

LOAD

2V < V < 45V, 1µA < I

IN

LT3007-1.5: V = 2.05V, I

= 100µA

< 20mA

1.485

1.47

1.5

1.515

1.53

V

IN

LOAD

2.05V < V < 45V, 1µA < I

IN

LT3007-1.8: V = 2.35V, I

= 100µA

< 20mA

1.782

1.764

1.8

1.818

1.836

V

IN

LOAD

2.35V < V < 45V, 1µA < I

IN

LT3007-2.5: V = 3.05V, I

= 100µA

< 20mA

2.475

2.45

2.5

2.525

2.55

V

IN

LOAD

3.05V < V < 45V, 1µA < I

IN

LT3007-3.3: V = 3.85V, I

= 100µA

< 20mA

3.267

3.234

3.3

3.333

3.366

V

IN

LOAD

3.85V < V < 45V, 1µA < I

IN

LT3007-5: V = 5.55V, I

= 100µA

4.95

4.9

5

5.05

5.1

V

IN

LOAD

5.55V < V < 45V, 1µA < I

< 20mA

LOAD

IN

ADJ Pin Voltage (Notes 3, 4)

Line Regulation (Note 3)

V

= 2V, I

IN

= 100µA

594

588

582

600

606

612

mV

IN

LOAD

l

2V < V < 45V, 1µA < I

< 20mA (E-, I-Grades)

LOAD

2V < V < 45V, 20µA < I

< 20mA (H-Grade)

l

LT3007-1.2: ∆V = 2V to 45V, I

= 1mA

1.2

1.5

1.8

2.5

3.3

5

6

7.5

9

mV

IN

LOAD

LT3007-1.5: ∆V = 2.05V to 45V, I

= 1mA

LOAD

LT3007-1.8: ∆V = 2.35V to 45V, I

= 1mA

LT3007-2.5: ∆V = 3.05V to 45V, I

12.5

16.5

25

3

LT3007-3.3: ∆V = 3.85V to 45V, I

IN

LT3007-5: ∆V = 5.55V to 45V, I

= 1mA

IN

LOAD

LT3007 (E-, I-Grades): ∆V = 2V to 45V, I

= 1mA

0.6

IN

LOAD

LT3007 (H-Grade): ∆V = 2V to 45V, I

= 1mA

LOAD

9

IN

l

Load Regulation (Note 3)

LT3007-1.2: V = 2V, I

= 1µA to 10mA

= 1µA to 20mA

0.8

1

4

10

mV

IN

LOAD

V

= 2V, I

IN

l

LT3007-1.5: V = 2.05V, I

= 1µA to 10mA

= 1µA to 20mA

1

1.3

5

13

mV

IN

LOAD

V

= 2.05V, I

IN

l

LT3007-1.8: V = 2.35V, I

= 1µA to 10mA

= 1µA to 20mA

1.2

1.5

6

15

mV

IN

LOAD

V

= 2.35V, I

IN

l

LT3007-2.5: V = 3.05V, I

= 1µA to 10mA

= 1µA to 20mA

1.7

2.1

8.3

21

mV

IN

LOAD

V

= 3.05V, I

IN

l

LT3007-3.3: V = 3.85V, I

= 1µA to 10mA

= 1µA to 20mA

2.2

2.8

11

28

mV

IN

LOAD

V

= 3.85V, I

IN

l

LT3007-5:

V

IN

V

IN

= 5.55V, I

= 1µA to 10mA

= 1µA to 20mA

3.4

4.2

17

42

mV

LOAD

l

LT3007 (E-, I-Grades): V = 2V, I

= 1µA to 10mA

= 1µA to 20mA

= 20µA to 10mA

= 20µA to 20mA

0.4

0.5

0.4

0.5

2

5

9

mV

IN

LOAD

V

IN

V

IN

V

IN

= 2V, I

LT3007 (H-Grade):

Dropout Voltage

= V

I

= 100µA

115

170

270

300

180

250

290

mV

LOAD

l

V

(Notes 5, 6)

OUT(NOMINAL)

= 100µA (E-, I-Grades)

= 100µA (H-Grade)

IN

I

= 1mA

= 1mA (E-, I-Grades)

= 1mA (H-Grade)

250

350

390

mV

LOAD

l

I

= 10mA

= 10mA (E-, I-Grades)

= 10mA (H-Grade)

340

470

510

mV

LOAD

l

I

= 20mA

= 20mA (E-, I-Grades)

= 20mA (H-Grade)

365

500

540

mV

LOAD

l

3007fa

3

For more information www.linear.com/LT3007

LT3007 Series

ELECTRICAL CHARACTERISTICS ^Thel denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T_J= 25°C. (Note 2)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

l

Quiescent Current (Notes 6, 7)

I

= 0µA (E-, I-Grades)

= 0µA (H-Grade)

3

6

7

µA

LOAD

l

GND Pin Current

IN

I

= 0µA (E-, I-Grades)

= 0µA (H-Grade)

= 100µA (E-, I-Grades)

= 100µA (H-Grade)

= 1mA

3

6

7

µA

LOAD

V

= V

+ 0.5V (Notes 6, 7)

OUT(NOMINAL)

12

14

50

500

1200

21

160

350

= 10mA

= 20mA

Output Voltage Noise (Note 9)

ADJ Pin Bias Current

C

= 2.2µF, I

= 20mA, BW = 10Hz to 100kHz

92

µV

RMS

OUT

LOAD

–10

0.4

10

nA

l

Shutdown Threshold

V

OUT

V

OUT

= Off to On

= On to Off

0.67

0.61

1.5

V

0.25

l

SHDN Pin Current

V

SHDN

V

SHDN

= 0V, V = 45V

±1

2

µA

IN

= 45V, V = 45V

0.65

IN

l

Quiescent Current in Shutdown

Ripple Rejection (Note 3)

V

= 6V, V

= 0V (E-, I-Grades)

<1

<9

µA

IN

SHDN

= 6V, V

= 0V (H-Grade)

= 0.5V

V

– V

= 2V, V

,

P-P

IN

OUT

= 120Hz, I

RIPPLE

f

= 20mA

RIPPLE

LT3007

LOAD

58

54

53

52

49

47

42

70

66

65

64

61

59

54

dB

LT3007-1.2

LT3007-1.5

LT3007-1.8

LT3007-2.5

LT3007-3.3

LT3007-5

Current Limit (Note 3)

V

= 45V, V

= 0

75

mA

IN

OUT

OUT(NOMINAL)

l

= V

+ 1V, ∆V

= –5%

22

OUT

Input Reverse-Leakage Current

Reverse-Output Current

V

= –45V, V

= 0

OUT

1

30

10

µA

IN

= 1.2V, V = 0

0.6

OUT

IN

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 5: Dropout voltage is the minimum input to output voltage differential

needed to maintain regulation at a specified output current. In dropout,

the output voltage equals (V – V

). For the LT3007-1.2 and

DROPOUT

IN

LT3007-1.5, dropout voltage will be limited by the minimum input voltage.

Note 2: The LT3007 is tested and specified under pulse load conditions

Note 6: To satisfy minimum input voltage requirements, the LT3007

adjustable version is tested and specified for these conditions with an

such that T @ T . The LT3007E regulators are 100% tested at T = 25°C

J

A

and performance is guaranteed from 0°C to 125°C. Performance at

−40°C to 125°C is assured by design, characterization and correlation

with statistical process controls. The LT3007I regulators are guaranteed

over the full −40°C to 125°C operating junction temperature range.

The LT3007H regulator is 100% tested at the 150°C operating junction

temperature. High junction temperatures degrade operating lifetimes.

Operating lifetime is derated at junction temperature greater than 125°C.

H-grade is available only in the adjustable version.

external resistor divider (61.9k bottom, 280k top) which sets V

The external resistor divider adds 9.69µA of DC load on the output. This

external current is not factored into GND pin current.

to 3.3V.

OUT

Note 7: GND pin current is tested with V = V

+ 0.55V and

IN

OUT(NOMINAL)

a current source load. GND pin current will increase in dropout. For the

fixed output voltage versions, an internal resistor divider will add about

1μA to the GND pin current. See the GND Pin Current curves in the Typical

Performance Characteristics section.

Note 3: The LT3007 adjustable version is tested and specified for these

conditions with the ADJ pin connected to the OUT pin.

Note 8: The SHDN pin can be driven below GND only when tied to the IN

pin directly or through a pull-up resistor. If the SHDN pin is driven below

GND by more than –0.3V while IN is powered, the output will turn on.

Note 9: Output noise is listed for the adjustable version with the ADJ pin

connected to the OUT pin. See the RMS Output Noise vs Load Current

curve in the Typical Performance Characteristics Section.

Note 4: Operating conditions are limited by maximum junction

temperature. The regulated output voltage specification will not apply

for all possible combinations of input voltage and output current. When

operating at the maximum input voltage, the output current range must be

limited. When operating at the maximum output current, the input voltage

must be limited.

3007fa

4

For more information www.linear.com/LT3007

LT3007 Series

TYPICAL PERFORMANCE CHARACTERISTICS ^T_A^{= 25°C, unless otherwise noted.}

Dropout Voltage

Minimum Input Voltage

450

400

350

300

250

200

150

100

50

450

400

350

300

250

200

150

100

50

2.0

1.8

1.6

1.4

1.2

1

I

= 20mA

LOAD

T = 125°C

J

T = 150°C

J

20mA

1mA

10mA

100µA

T = 25°C

J

0.8

0.6

0.4

0.2

0

5

10

15

20

–50 –25

0

25 50 75 100 125 150

–50 –25

0

25 50 75 100 125 150

OUTPUT CURRENT (mA)

TEMPERATURE (°C)

3007 G01

3007 G03

3007 G02

ADJ Pin Voltage

Output Voltage LT3007-1.2

Output Voltage LT3007-1.5

0.612

0.610

0.608

0.606

0.604

0.602

0.600

0.598

0.596

0.594

0.592

0.590

0.588

1.224

1.220

1.216

1.212

1.208

1.204

1.200

1.196

1.192

1.188

1.184

1.180

1.176

1.530

1.525

1.520

1.515

1.510

1.505

1.500

1.495

1.490

1.485

1.480

1.475

1.470

I

= 100µA

I

= 100µA

LOAD

I

= 100µA

LOAD

–50 –25

0

25 50 75 100 125 150

–50 –25

0

25 50 75 100 125 150

–50 –25

0

25 50 75 100 125 150

TEMPERATURE (°C)

3007 G05

3007 G06

3007 G04

Output Voltage LT3007-1.8

Output Voltage LT3007-2.5

Output Voltage LT3007-3.3

3.366

1.836

1.830

1.824

1.816

1.812

1.806

1.800

1.794

1.788

1.782

1.776

1.770

1.764

2.550

2.540

I

= 100µA

I

= 100µA

I

= 100µA

LOAD

3.355

3.344

2.530

2.520

3.333

3.322

3.311

3.300

3.289

3.278

3.267

3.256

3.245

3.234

2.510

2.500

2.490

2.480

2.470

2.460

2.450

–50 –25

0

25 50 75 100 125 150

–50 –25

0

25 50 75 100 125 150

–50 –25

0

25 50 75 100 125 150

TEMPERATURE (°C)

3007 G09

3007 G07

3007 G08

3007fa

5

For more information www.linear.com/LT3007

LT3007 Series

TYPICAL PERFORMANCE CHARACTERISTICS ^T_A^{= 25°C, unless otherwise noted.}

Output Voltage LT3007-5

ADJ Pin Bias Current

Adjustable Quiescent Current

5.100

5.075

5.050

5.025

10

8

6

5

4

3

2

1

0

I

= 100µA

LOAD

6

4

2

5.000

4.975

4.950

4.925

4.900

0

–2

–4

–6

–8

–10

–50 –25

0

25 50 75 100 125 150

–50 –25

0

25 50 75 100 125 150

–50 –25

0

25 50 75 100 125 150

TEMPERATURE (°C)

3007 G10

3007 G11

3007 G12

Quiescent Current

GND Pin Current LT3007-1.2

GND Pin Current LT3007-1.5

30

27

24

21

18

15

12

9

500

450

400

350

300

250

200

150

100

50

500

450

400

350

300

250

200

150

100

50

LT3007-1.2

LT3007-1.5

LT3007-1.8

LT3007-2.5

LT3007-3.3

LT3007-5

R

= 75Ω, I = 20mA

L

R

= 60Ω, I = 20mA

L

R

L

= 150Ω, I = 10mA

L

R

L

= 120Ω, I = 10mA

L

6

R

L

= 15k, I = 100µA

L

R

L

= 12k, I = 100µA

L

3

R

L

= 1.5k, I = 1mA

L

R

L

= 1.2k, I = 1mA

L

0

1

2

3

4

5

6

7

8

9 10

0

2

3

4

5

6

7

8

9

10

0

2

3

4

5

6

7

8

9

10

1

INPUT VOLTAGE (V)

3007 G15

3007 G14

3007 G13

GND Pin Current LT3007-1.8

GND Pin Current LT3007-2.5

GND Pin Current LT3007-3.3

500

450

400

350

300

250

200

150

100

50

500

450

400

350

300

250

200

150

100

50

500

450

400

350

300

250

200

150

100

50

R

= 165Ω, I = 20mA

L

R

L

= 90Ω, I = 20mA

R

= 125Ω, I = 20mA

L

R

L

= 330Ω, I = 10mA

L

R

L

= 180Ω, I = 10mA

L

R = 250Ω, I = 10mA

L L

R

L

= 33k, I = 100µA

L

R

2

= 25k, I = 100µA

L

R

L

= 18k, I = 100µA

L

R

L

= 1.8k, I = 1mA

R = 3.3k, I = 1mA

L L

R

L

= 2.5k, I = 1mA

L

0

2

3

4

5

6

7

8

9

10

0

3

4

5

6

7

8

9

10

0

2

3

4

5

6

7

8

9

10

1

INPUT VOLTAGE (V)

3007 G16

3007 G17

3007 G18

3007fa

6

For more information www.linear.com/LT3007

LT3007 Series

TYPICAL PERFORMANCE CHARACTERISTICS ^T_A^{= 25°C, unless otherwise noted.}

GND Pin Current vs I_LOAD

SHDN Pin Thresholds

GND Pin Current LT3007-5

500

450

400

350

300

250

200

150

100

50

1000

100

10

1.5

1.4

1.3

1.2

1.1

1

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

V

= 3.8V

IN

OUT

= 3.3V

R

= 250Ω, I = 20mA

L

OFF TO ON

ON TO OFF

R

L

= 500Ω, I = 10mA

L

R

L

= 50k, I = 100µA

L

R

L

= 5k, I = 1mA

L

0

1

0

2

3

4

5

6

7

8

9

10

0.001

0.01

0.1

1

10

100

–50

0

25 50 75 100

TEMPERATURE (°C)

125 150

1

–25

INPUT VOLTAGE (V)

LOAD (mA)

3007 G19

3007 G21

3007 G20

Current Limit

SHDN Pin Input Current

2.0

1.8

1.6

1.4

1.2

1

2.0

1.8

1.6

1.4

1.2

1

100

90

80

70

60

50

40

30

20

10

0

V

OUT

= 0V

V

= 45V

IN

V = 2V

IN

V

= 45V

0.8

0.6

0.4

0.2

0

SHDN

0.8

0.6

0.4

0.2

0

–50

–25

0

25 50 75 100 125 150

TEMPERATURE (°C)

3007 G23

0

5

10 15 20 25 30 35 40 45

SHDN PIN VOLTAGE (V)

3007 G22

–50

0

25 50 75 100 125 150

TEMPERATURE (°C)

3007 G24

–25

Reverse-Output Current

Input Ripple Rejection

50

45

40

35

30

25

20

15

10

5

80

70

60

50

40

30

20

10

0

90

80

70

60

50

40

30

20

10

0

V

= 2.1V + 50mV

RMS

OUT

LOAD

OUT = ADJ = 1.2V

IN = SHDN = GND

IN

= 600mV

= 20mA

I

C

OUT

= 10µF

ADJ

V

= V

(NOMINAL) + 2V + 0.5V

OUT P-P

C

OUT

= 2.2µF

IN

RIPPLE AT f = 120Hz

= 20mA

OUT

I

LOAD

0

25 50 75 100 125 150

TEMPERATURE (°C)

3007 G25

10

100

1000

10000 100000 1000000

–50

0

–25

125 150

–50

0

25 50 75 100

TEMPERATURE (°C)

–25

FREQUENCY (Hz)

3007 G26

3007 G27

3007fa

7

For more information www.linear.com/LT3007

LT3007 Series

TYPICAL PERFORMANCE CHARACTERISTICS ^T_A^{= 25°C, unless otherwise noted.}

RMS Output Noise

vs Load Current

Load Regulation

Output Noise Spectral Density

5

4

500

450

100

10

1

C

OUT

= 10µF

V

= 0.6V

C

I

= 2.2µF

= 20mA

5V

OUT

IN

OUT

= 2.1V

3.3V

2.5V

1.8V

1.5V

1V

LOAD

400

350

3.3V

3

300

250

200

150

0.6V

2.5V

1.8V

2

1

1.5V

∆I = 1μA TO 20mA

L

1.2V

0.6V

100

50

0

∆I = 20μA TO 20mA

L

–1

–50 –25

0.1

0

25 50 75 100 125 150

0.01

0.1

I

1

100

0.001

10

100

1k

10k

100k

TEMPERATURE (°C)

(mA)

FREQUENCY (Hz)

LOAD

3007 G28

3007 G29

3007 G30

Transient Response

Transient Response (Load Dump)

I

= 1mA TO 20mA

= 5.5V

OUT

IN

I

= 1mA TO 20mA

= 5.5V

OUT

IN

V

C

V

C

V

= 5V

OUT

= 5V

OUT

50mV/DIV

= 2.2µF

= 10µF

V

OUT

V

OUT

45V

12V

50mV/DIV

V

I

= 5V

= 20mA

= 4.7µF

OUT

C

OUT

V

IN

I

10V/DIV

OUT

I

OUT

20mA/DIV

3007 G31

3007 G32

3007 G33

500µs/DIV

1ms/DIV

3007fa

8

For more information www.linear.com/LT3007

LT3007 Series

PIN FUNCTIONS

SHDN (Pin 1): Shutdown. Pulling the SHDN pin low puts

ADJ(Pin8):Adjust.Thispinistheerroramplifier’sinverting

terminal. Its 400pA typical input bias current flows out of

the pin (see curve of ADJ Pin Bias Current vs Temperature

in the Typical Performance Characteristics section). The

ADJ pin voltage is 600mV referenced to GND and the

output voltage range is 600mV to 44.5V.

the LT3007 into a low power state and turns the output

off. If unused, tie the SHDN pin to V . The LT3007 does

IN

not function if the SHDN pin is not connected. The SHDN

pin cannot be driven below GND unless tied to the IN pin.

If the SHDN pin is driven below GND while IN is powered,

the output will turn on. SHDN pin logic cannot be refer-

enced to a negative rail.

SENSE (Pin 8): Sense. For fixed voltage versions of the

LT3007 (LT3007-1.2, LT3007-1.5, LT3007-1.8, LT3007-

2.5, LT3007-3.3, LT3007-5), the SENSE pin is the input to

the error amplifier. Optimum regulation is obtained at the

point where the SENSE pin is connected to the OUT pin of

the regulator. In critical applications, small voltage drops

are caused by the resistance (RP) of PC traces between

the regulator and the load. These may be eliminated by

connecting the SENSE pin to the output at the load as

shown in Figure 1 (Kelvin Sense Connection). Note that

the voltage drop across the external PC traces add to the

dropoutvoltageoftheregulator.TheSENSEpinbiascurrent

is 1µA at the nominal rated output voltage. The SENSE pin

can be pulled below ground (as in a dual supply system

where the regulator load is returned to a negative supply)

and still allow the device to start and operate.

GND (Pins 2, 3, 4): Ground. Connect the bottom of the

resistor divider that sets output voltage directly to GND

for the best regulation.

IN (Pin 5): Input. The IN pin supplies power to the device.

The LT3007 requires a bypass capacitor at IN if the device

is more than six inches away from the main input filter

capacitor. In general, the output impedance of a battery

rises with frequency, so it is advisable to include a bypass

capacitor in battery-powered circuits. A bypass capacitor

in the range of 0.1µF to 10µF will suffice. The LT3007

withstands reverse voltages on the IN pin with respect to

ground and the OUT pin. In the case of a reversed input,

which occurs with a battery plugged in backwards, the

LT3007 acts as if a blocking diode is in series with its

input. No reverse current flows into the LT3007 and no

reverse voltage appears at the load. The device protects

both itself and the load.

R

P

IN

OUT

LT3007

+

SHDN SENSE

LOAD

V

IN

NC (Pin 6): No Connect. Pin 6 is an NC pin in the TSOT-23

package. This pin is not tied to any internal circuitry. LTC

recommends that the NC pin be floated for fault tolerant

operation.

GND

3007 F01

R

P

Figure 1. Kelvin Sense Connection

OUT (Pin 7): Output. This pin supplies power to the load.

Use a minimum output capacitor of 2.2µF to prevent os-

cillations. Large load transient applications require larger

output capacitors to limit peak voltage transients. See the

Applications Information section for more information on

output capacitance and reverse-output characteristics.

3007fa

9

For more information www.linear.com/LT3007

LT3007 Series

APPLICATIONS INFORMATION

The LT3007 is a low dropout linear regulator with ultra-

low quiescent current and shutdown. Quiescent current is

extremely low at 3µA and drops well below 1µA in shut-

down. The device supplies up to 20mA of output current.

Dropout voltage at 20mA is typically 300mV. The LT3007

incorporatesseveralprotectionfeatures,makingitidealfor

useinbattery-poweredsystems.Thedeviceprotectsitself

against both reverse-input and reverse-output voltages.

In battery backup applications, where a backup battery

holds up the output when the input is pulled to ground,

the LT3007 acts as if a blocking diode is in series with its

output and prevents reverse current flow. In applications

where the regulator load returns to a negative supply, the

output can be pulled below ground by as much as 50V

without affecting start-up or normal operation.

and the divider current is zero. Curves of ADJ Pin Voltage vs

TemperatureandADJPinBiasCurrentvsTemperatureappear

in the Typical Performance Characteristics.

Specifications for output voltages greater than 0.6V are

proportional to the ratio of the desired output voltage to

0.6V:V /0.6V.Forexample,loadregulationforanoutput

OUT

current change of 100µA to 20mA is –0.5mV typical at

V

= 0.6V. At V

= 5V, load regulation is:

OUT

5V

0.6V

• (−0.5mV)= −4.17mV

Table 1 shows resistor divider values for some common

outputvoltageswitharesistordividercurrentofabout1µA.

Table 1. Output Voltage Resistor Divider Values

V

R1

R2

OUT

Care must be taken when designing LT3007 applications

to operate at temperatures greater than 125°C. See the

HighTemperatureOperationSectionformoreinformation.

1V

1.2V

1.5V

1.8V

2.5V

3V

604k

590k

619k

590k

402k

590k

887k

Adjustable Operation

1.18M

1.87M

2.37M

2.8M

4.32M

The LT3007 has an output voltage range of 0.6V to 44.5V.

Figure 2 shows that output voltage is set by the ratio of two

external resistors. The IC regulates the output to maintain the

ADJ pin voltage at 600mV referenced to ground. The current

in R1 equals 600mV/R1 and the current in R2 is the current

in R1 minus the ADJ pin bias current. The ADJ pin bias cur-

rent, typically 400pA at 25°C, flows out of the pin. Calculate

the output voltage using the formula in Figure 2. An R1 value

of 619k sets the divider current to 0.97µA. Do not make R1’s

value any greater than 619kto minimize output voltage errors

due to the ADJ pin bias current and to insure stability under

minimum load conditions. In shutdown, the output turns off

3.3V

5V

Because the ADJ pin is relatively high impedance (de-

pendingontheresistordividerused),straycapacitances

atthispinshouldbeminimized.Specialattentionshould

be given to any stray capacitances that can couple ex-

ternal signals onto the ADJ pin, producing undesirable

output transients or ripple.

Extra care should be taken in assembly when using high

valuedresistors.Smallamountsofboardcontamination

canleadtosignificantshiftsinoutputvoltage.Appropriate

post-assembly board cleaning measures should be

implemented to prevent board contamination. If the

board is to be subjected to humidity cycling or if board

cleaningmeasurescannotbeguaranteed,consideration

shouldbegiventousingresistorsanorderofmagnitude

smaller than in Table 1 to prevent contamination from

causing unwanted shifts in the output voltage. A fixed

voltage option in the LT3007 series does not need these

special considerations.

V

OUT

IN

OUT

V

IN

LT3007

R2

R1

SHDN

GND

ADJ

3007 F02

V

= 600mV • (1 + R2/R1) – (I

• R2)

ADJ

OUT

ADJ

= 600mV

I

= 0.4nA at 25°C

OUTPUT RANGE = 0.6V to 44.5V

ADJ

Figure 2. Adjustable Operation

3007fa

10

For more information www.linear.com/LT3007

LT3007 Series

APPLICATIONS INFORMATION

Output Capacitance and Transient Response

over the operating temperature range. The X5R and X7R

dielectrics yield more stable characteristics and are more

suitable for use as the output capacitor. The X7R type has

better stability across temperature, while the X5R is less

expensive and is available in higher values. One must still

exercise care when using X5R and X7R capacitors; the

X5R and X7R codes only specify operating temperature

rangeandmaximumcapacitancechangeovertemperature.

Capacitance change due to DC bias with X5R and X7R

capacitors is better than Y5V and Z5U capacitors, but can

still be significant enough to drop capacitor values below

appropriate levels. Capacitor DC bias characteristics tend

toimproveascomponentcasesizeincreases,butexpected

capacitance at operating voltage should be verified.

The LT3007 is stable with a wide range of output capaci-

tors.TheESRoftheoutputcapacitoraffectsstability,most

notably with small capacitors. Use a minimum output

capacitor of 2.2µF with an ESR of 3Ω or less to prevent

oscillations.TheLT3007isamicropowerdeviceandoutput

loadtransientresponseisafunctionofoutputcapacitance.

Larger values of output capacitance decrease the peak

deviations and provide improved transient response for

larger load current changes.

Give extra consideration to the use of ceramic capacitors.

Manufacturers make ceramic capacitors with a variety of

dielectrics,eachwithdifferentbehavioracrosstemperature

and applied voltage. The most common dielectrics are

specified with EIA temperature characteristic codes of

Z5U, Y5V, X5R and X7R. The Z5U and Y5V dielectrics

provide high C-V products in a small package at low cost,

but exhibit strong voltage and temperature coefficients as

shown in Figures 3 and 4. When used with a 5V regulator,

a 16V 10µF Y5V capacitor can exhibit an effective value

as low as 1µF to 2µF for the DC bias voltage applied and

Voltage and temperature coefficients are not the only

sources of problems. Some ceramic capacitors have a

piezoelectric response. A piezoelectric device generates

voltage across its terminals due to mechanical stress,

similar to the way a piezoelectric accelerometer or micro-

phone works. For a ceramic capacitor, the stress can be

induced by vibrations in the system or thermal transients.

40

20

BOTH CAPACITORS ARE 16V,

1210 CASE SIZE, 10µF

0

X5R

0

–20

–40

Y5V

–60

Y5V

–80

BOTH CAPACITORS ARE 16V,

1210 CASE SIZE, 10µF

–100

–50 –25

0

25

50

TEMPERATURE (°C)

75

100 125

0

8

12 14

2

4

6

10

16

DC BIAS VOLTAGE (V)

3007 F04

3007 F03

Figure 3. Ceramic Capacitor DC Bias Characteristics

Figure 4. Ceramic Capacitor Temperature Characteristics

3007fa

11

For more information www.linear.com/LT3007

LT3007 Series

APPLICATIONS INFORMATION

The resulting voltages produced can cause appreciable

amounts of noise, especially when a ceramic capacitor is

used for noise bypassing. A ceramic capacitor produced

Figure 5’s trace in response to light tapping from a pencil.

Similar vibration induced behavior can masquerade as

increased output voltage noise.

Table 2. Feedforward Capacitor Values

NOMINAL V FEEDFORWARD CAPACITANCE

OUT

1.2 < V

2.5 < V

≤ 2.5

≤ 7.5

470pF/μA • I

220pF/μA • I

100pF/μA • I

(μA)

OUT

FB-DIVIDER

V

OUT

> 7.5

For example, a 5V output with a 1μA current flowing in

the feedback resistor divider:

V

C

LOAD

= 0.6V

= 22µF

= 10µA

OUT

I

C = 220pF/μA • 1μA = 220pF

FF

V

OUT

500µV/DIV

C

= 0

FF

V

OUT

C

FF

= 220pF

100mV/DIV

3007 F05

100ms/DIV

V

C

= 5V

OUT

= 10µF

Figure 5. Noise Resulting from Tapping

on a Ceramic Capacitor

I

= 1µA

FB-DIVIDER

LOAD CURRENT

2mA TO 20mA

3007 F07

500µs/DIV

Feedforward Capacitance

Using a feedforward capacitor (C ) from V

Figure 7. Transient Response with

Feedforward Capacitor

to the ADJ

OUT

FF

pin of the LT3007 improves transient response for output

voltages greater than 0.6V. With no feedforward capaci-

tor, the settling time will increase as the output voltage

is raised above 0.6V. A 4.7μF minimum output capacitor

with an ESR of no more than 3Ω is required when using

a feedforward capacitor. Use Table 2 to determine the

Start-uptimeisaffectedbytheuseofafeedforwardcapaci-

tor. Start-up time is directly proportional to the size of the

feedforward capacitorand outputvoltage, andis inversely

proportional to the feedback resistor divider current.

Theuseofafeedforwardcapacitorisrequiredforoperation

at junction temperatures above 135°C in order to ensure

good transient response.

recommended value of C to achieve optimal transient

FF

response while maintaining stability. Round up to the

nearest standard capacitor value.

C

= 0

FF

V

IN

OUT

ADJ

OUT

V

C

IN

FF

OUT

LT3007

V

OUT

C

FF

= 4700pF

R2

R1

200mV/DIV

SHDN

GND

V

C

= 5V

OUT

= 10µF

V_OUT

R1+R2

I_FB-DIVIDER

=

I

= 20µA

FB-DIVIDER

LOAD CURRENT

2mA TO 20mA

3007 F06

3007 F08

500µs/DIV

Figure 6. Feedforward Capacitor

Figure 8. Transient Response with

Feedforward Capacitor at 150°C

3007fa

12

For more information www.linear.com/LT3007

LT3007 Series

APPLICATIONS INFORMATION

Thermal Considerations

layer GND planes achieves 45°C/W thermal resistance.

This is approximately a 30% improvement over the lowest

numbers shown in Table 3.

The LT3007’s maximum rated junction temperature of

125°C limits its power-handling capability. Two compo-

nents comprise the power dissipated by the device:

Table 3: Measured Thermal Resistance for TSOT-23 Package

COPPER AREA

1. Output current multiplied by the input/output voltage

BOARD

AREA

THERMAL RESISTANCE

(JUNCTION-TO-AMBIENT)

TOPSIDE*

BACKSIDE

differential: I

• (V – V

)

OUT

IN

OUT

2

2500mm

65°C/W

67°C/W

70°C/W

75°C/W

85°C/W

2. GND pin current multiplied by the input voltage:

• V

2

1000mm

2500mm

I

GND

IN

2

225mm

2500mm

GND pin current is found by examining the GND Pin Cur-

rent curves in the Typical Performance Characteristics

section. Power dissipation is equal to the sum of the two

components listed prior.

2

100mm

2500mm

2

50mm

2500mm

*Device is mounted on the topside.

Calculating Junction Temperature

TheLT3007regulatorhasinternalthermallimitingdesigned

to protect the device during overload conditions. For con-

tinuous normal conditions, do not exceed the maximum

junction temperature rating of 125°C. Carefully consider

all sources of thermal resistance from junction to ambi-

ent including other heat sources mounted in proximity to

the LT3007. For surface mount devices, heat sinking is

accomplished by using the heat spreading capabilities of

the PC board and its copper traces. Copper board stiffen-

ers and plated through-holes can also be used to spread

the heat generated by power devices.

Example: Given an output voltage of 3.3V, an input volt-

age range of 12V 5%, an output current range of 0mA

to 20mA and a maximum ambient temperature of 85°C,

what will the maximum junction temperature be?

The power dissipated by the device is equal to:

I

(V

– V ) + I

(V

)

OUT(MAX) IN(MAX)

OUT

GND IN(MAX)

where,

I

= 20mA

= 12.6V

OUT(MAX)

The following tables list thermal resistance for several

different board sizes and copper areas. All measurements

were taken in still air on 3/32" FR-4 two-layer boards with

one ounce copper.

V

IN(MAX)

I

at (I = 20mA, V = 12.6V) = 0.3mA

OUT IN

GND

So,

P = 20mA(12.6V – 3.3V) + 0.3mA(12.6V) = 189.8mW

PCB layers, copper weight, board layout and thermal vias

affect the resultant thermal resistance. Although Table 2

provides thermal resistance numbers for 2-layer boards

with1ouncecopper,modernmultilayerPCBsprovidebet-

ter performance than found in these tables. For example,

a 4-layer, 1 ounce copper PCB board with three thermal

vias from the three fused TSOT-23 GND pins to inner

The thermal resistance ranges from 65°C/W to 85°C/W

dependingonthecopperarea.So,thejunctiontemperature

rise above ambient approximately equals:

0.1898W(75°C/W) = 14.2°C

3007fa

13

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LT3007 Series

APPLICATIONS INFORMATION

The maximum junction temperature equals the maximum

junctiontemperatureriseaboveambientplusthemaximum

ambient temperature or:

Operation of the LT3007 at temperatures above 125°C

requires careful selection of external components to

ensure output regulation, stability and optimal transient

response. Figures 9 and 10 have curves showing power

device leakage (from IN to OUT) for the LT3007 in both

active and shutdown states. The minimum external load

must be greater than this leakage to prevent the OUT pin

from rising out of regulation due to power device leakage.

Power device leakage decreases if the LT3007 is active;

if IN is tied directly to SHDN, the minimum required load

is reduced. The recommended minimum external load is

20µA. The use of a feedforward capacitor is required for

operation at temperatures above 135°C (see Feedforward

Capacitance section). For output voltages of 1.2V and

above, the feedforward capacitor ensures good transient

response. UseoftheLT3007attemperaturesabove135°C

and output voltages under 1.2V is not advised.

T

= 85°C + 14.2°C = 99.2°C

J(MAX)

High Temperature Operation

CaremustbetakenwhendesigningLT3007applicationsto

operate at high ambient temperatures. The LT3007 works

at elevated temperatures but erratic operation can occur

due to unforeseen variations in external components.

Some tantalum capacitors are available for high tempera-

ture operation, but ESR is often several Ohms; capacitor

ESR above 3Ω is unsuitable for use with the LT3007.

Ceramic capacitor manufacturers (Murata, AVX, TDK,

and Vishay at the time of this writing) now offer ceramic

capacitorsthatareratedto150°CusinganX8Rdielectric.

Device instability will occur if the output capacitor value

and ESR are outside design limits at elevated tempera-

ture and operating DC voltage bias (see information on

capacitor characteristics under Output Capacitance and

Transient Response). Check each passive component

for absolute value and voltage ratings over the operating

temperature range.

Leakage in capacitors, or from solder flux left after insuf-

ficient board cleaning, adversely affects the low quiescent

currentoperation.Considerjunctiontemperatureincrease

due to power dissipation in both the junction and nearby

components to ensure maximum specifications are not

violated for the LT3007 or external components.

10

2.0

V

= 0V

OUT

ADJ

V

= 0V

= 0.7V

OUT

ADJ

9

8

7

6

5

4

3

2

1

0

1.8

1.6

1.4

1.2

1

V

= 45V

IN

V

IN

= 45V

0.8

0.6

0.4

0.2

0

V

= 2.1V

IN

V

IN

= 2.1V

100

110

120

130

140

150

100

110

120

130

140

150

TEMPERATURE (°C)

3007 F09

3007 F10

Figure 9. Power Device Leakage, SHDN = 0V

Figure 10. Power Device Leakage, SHDN = 1.5V

3007fa

14

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LT3007 Series

APPLICATIONS INFORMATION

Protection Features

The LT3007 incurs no damage if OUT is pulled below

ground. If IN is left open circuit or grounded, OUT can be

pulled below ground by 50V. No current flows from the

pass transistor connected to OUT. However, current flows

in (but is limited by) the resistor divider that sets output

voltage. Current flows from the bottom resistor in the

divider and from the ADJ pin’s internal clamp through the

top resistor in the divider to the external circuitry pulling

OUT below ground. If IN is powered by a voltage source,

OUT sources current equal to its current limit capability

andtheLT3007protectsitselfbythermallimitingifneces-

sary. In this case, grounding the SHDN pin turns off the

LT3007 and stops OUT from sourcing current.

The LT3007 incorporates several protection features that

make it ideal for use in battery-powered circuits. In ad-

dition to the normal protection features associated with

monolithicregulators,suchascurrentlimitingandthermal

limiting, the device also protects against reverse-input

voltages, reverse-output voltages and reverse output-to-

input voltages.

Current limit protection and thermal overload protection

protect the device against current overload conditions at

the output of the device. For normal operation, do not ex-

ceed a junction temperature of 125°C. The typical thermal

shutdown circuitry temperature threshold is 160°C.

The LT3007 incurs no damage if the ADJ pin is pulled

above or below ground by 50V. If IN is left open circuit or

grounded, ADJ acts like a 100k resistor in series with a

diode when pulled above or below ground.

The IN pin withstands reverse voltages of 50V. The de-

vice limits current flow to less than 30µA (typically less

than 1µA) and no negative voltage appears at OUT. The

device protects both itself and the load against batteries

that are plugged in backwards.

In circuits where a backup battery is required, several

different input/output conditions can occur. The output

voltage may be held up while the input is either pulled

to ground, pulled to some intermediate voltage or is left

open circuit. Current flow back into the output follows the

curve shown in Figure 11.

The SHDN pin cannot be driven below GND unless tied to

the IN pin. If the SHDN pin is driven below GND while IN

is powered, the output will turn on. SHDN pin logic cannot

be referenced to a negative rail.

100

90

80

70

60

50

40

30

20

10

0

ADJ CURRENT

OUT CURRENT

0

1

2

3

4

5

6

7

8

9

10

OUTPUT AND ADJ VOLTAGE (V)

3007 F11

Figure 11. Reverse-Output Current

3007fa

15

For more information www.linear.com/LT3007

LT3007 Series

APPLICATIONS INFORMATION

If the LT3007 IN pin is forced below the OUT pin or the

OUT pin is pulled above the IN pin, input current typically

drops to less than 1µA. This occurs if the LT3007 input is

connected to a discharged (low voltage) battery and either

a backup battery or a second regulator circuit holds up

the output. The state of the SHDN pin has no effect in the

reverse current if OUT is pulled above IN.

Fault Tolerance

The LT3007 regulators tolerate single fault conditions.

Shorting two adjacent pins together or leaving one single

pin floating does not increase V

value or cause damage to the LT3007 regulators. How-

ever, the application circuit must meet the requirements

discussed in this section to achieve this tolerance level.

Tables 4 and 5 show the effects that result from shorting

adjacent pins or from a floating pin, respectively.

above its regulated

OUT

Table 4: Effects of Pin-to-Pin Shorts

NUMBERS PIN NAMES EFFECT

COMMENT

1-2

2-3

3-4

5-6

6-7

7-8

SHDN-GND LT3007 is in Micropower Shutdown, V

is Off

OUT

GND-GND No Effect. Pins 2, 3 and 4 are Normally Tied to GND

IN-NC

NC-OUT

OUT-ADJ

No Effect as Long as NC is Floating

V

OUT

V

OUT

Decreases to 600mV as the Top Resistor in the

Divider is Shorted

LT3007 Adjustable Version

7-8

OUT-SENSE No Effect as These Two Pins are Normally Shorted Together

LT3007 Fixed Voltage version.

Table 5: Effects of Floating Pins

NUMBER PIN NAME EFFECT

COMMENT

1

2

3

4

5

6

7

8

SHDN

GND

IN

LT3007 is in Micropower Shutdown, V

is Off

OUT

No Effect as Long as Pins 3 or 4 are Tied to GND

No Effect as Long as Pins 2 or 4 are Tied to GND

No Effect as Long as Pins 2 or 3 are Tied to GND

LT3007 Has No Input Power, V

No Effect

is Off

OUT

NC

OUT

ADJ

V

OUT

V

OUT

V

OUT

Internal to LT3007 is @ V . V

Externally Decreases to 0V

IN OUT

Decreases to Less Than Regulated V

LT3007 Adjustable Version

OUT

SENSE

Increases to @ V Unless an External Clamp is Added

LT3007 Fixed Voltage version.

IN

3007fa

16

For more information www.linear.com/LT3007

LT3007 Series

TYPICAL APPLICATIONS

Keep-Alive Power Supply

NO PROTECTION

DIODES NEEDED!

3.3V

V

IN

12V

IN

OUT

LT3007-3.3

1µF

2.2µF

LOAD:

SHDN SENSE

SYSTEM MONITOR,

VOLATILE MEMORY, ETC.

GND

3007 TA02

Last-Gasp Circuit

LINE POWER

V

LINE

12V TO 15V

SENSE

D

CHARGE

LINE

INTERRUPT

DETECT

R

LIMIT

TO

5V

PWR

FAULT

MONITORING

CENTER

IN

OUT

GND

SUPERCAP

1µF

2.2µF

LT3007-5

3007 TA03

SHDN SENSE

GND

3007fa

17

For more information www.linear.com/LT3007

LT3007 Series

PACKAGE DESCRIPTION

Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.

TS8 Package

8-Lead Plastic TSOT-23

(Reference LTC DWG # 05-08-1637 Rev A)

2.90 BSC

(NOTE 4)

0.40

MAX

0.65

REF

1.22 REF

1.4 MIN

1.50 – 1.75

(NOTE 4)

2.80 BSC

3.85 MAX 2.62 REF

PIN ONE ID

RECOMMENDED SOLDER PAD LAYOUT

PER IPC CALCULATOR

0.22 – 0.36

8 PLCS (NOTE 3)

0.65 BSC

0.80 – 0.90

0.20 BSC

DATUM ‘A’

0.01 – 0.10

1.00 MAX

0.30 – 0.50 REF

1.95 BSC

TS8 TSOT-23 0710 REV A

0.09 – 0.20

(NOTE 3)

NOTE:

1. DIMENSIONS ARE IN MILLIMETERS

2. DRAWING NOT TO SCALE

3. DIMENSIONS ARE INCLUSIVE OF PLATING

4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR

5. MOLD FLASH SHALL NOT EXCEED 0.254mm

6. JEDEC PACKAGE REFERENCE IS MO-193

3007fa

18

For more information www.linear.com/LT3007

LT3007 Series

REVISION HISTORY

REV

DATE

11/14 Added H-grade

Modified Conditions for Current Limit graph

DESCRIPTION

PAGE NUMBER

A

2 to 5

7

Updated Load Regulation graph

8

Modified High Temperature section in Applications Information

Added Feedforward Capacitance section

10

12

14

Added High Temperature Operation section

3007fa

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

For more information www.linear.com/LT3007

19

LT3007 Series

TYPICAL APPLICATION

Average Power Savings for Low Duty Cycle Applications

0mA to 10mA Pulsed Load, IN = 12V

Low Duty Cycle Applications

100

90

80

70

60

3.3V

V

IN

OUT

LT3007-3.3

12V

1µF

2.2µF

LOW DUTY CYCLE

PULSED LOAD

0mA TO 10mA

SHDN SENSE

100µA I

GND

Q

50

40

30

20

10

0

30µA I

Q

3007 TA04a

10µA I

Q

1

10

0.1

DUTY CYCLE (%)

3007 TA04b

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

LT1761

100mA, Low Noise Micropower LDO V : 1.8V to 20V, V

= 1.22V, V = 0.3V, I = 20µA, I < 1µA, Low Noise: < 20µV

,

IN

OUT

DO

Q

SD

RMS

Stable with 1µF Ceramic Capacitors, ThinSOT^TMPackage

LT1762

LT1763

150mA, Low Noise Micropower LDO V : 1.8V to 20V, V

= 1.22V, V = 0.3V, I = 25µA, I < 1µA, Low Noise: < 20µV

,

IN

OUT

DO

Q

SD

RMS

MS8 Package

500mA, Low Noise Micropower LDO V : 1.8V to 20V, V

= 1.22V, V = 0.3V, I = 30µA, I < 1µA, Low Noise: < 20µV

,

IN

DO

Q

SD

RMS

S8 Package

LT1764/LT1764A 3A, Low Noise, Fast Transient

Response LDOs

V : 2.7V to 20V, V

= 1.21V, V = 0.34V, I = 1mA, I < 1µA, Low Noise: < 40µV

,

IN

DO

Q

SD

RMS

LT1764A Version Stable with Ceramic Capacitors, DD and TO220-5 Packages

LT1962

300mA, Low Noise Micropower LDO V : 1.8V to 20V, V

= 1.22V, V = 0.27V, I = 30µA, I < 1µA,

OUT(MIN) DO Q SD

RMS

IN

Low Noise: < 20µV

, MS8 Package

LT1963/LT1963A 1.5A, Low Noise, Fast Transient

Response LDOs

V : 2.1V to 20V, V

= 1.21V, V = 0.34V, I = 1mA, I < 1µA,

OUT(MIN) DO Q SD

RMS

IN

Low Noise: < 40µV

, LT1963A Version Stable with Ceramic Capacitors, DD, TO220-5,

SOT223 and S8 Packages

LT3008

20mA, 45V, 3µA I Micropower LDO 300mV Dropout Voltage, Low I : 3µA, V : 2V to 45V, V : 0.6V to 39.5V, ThinSOT and

Q Q IN OUT

2mm × 3mm DFN-6 Packages

LT3009

LT3020

20mA, 3µA I Micropower LDO

V : 1.6V to 20V, Low I : 3µA, V = 0.28V, 2mm × 2mm DFN and SC70-8 Packages

Q

IN

Q

DO

100mA, Low Voltage VLDO

V : 0.9V to 10V, V

= 0.20V, V = 0.15V, I = 120µA, I < 1µA, 3mm × 3mm DFN

OUT(MIN) DO Q SD

IN

and MS8 Packages

LT3021

500mA, Low Voltage VLDO

V : 0.9V to 10V, V

= 0.20V, V = 0.16V, I = 120µA, I < 3µA, 5mm × 5mm DFN

OUT(MIN) DO Q SD

IN

and SO8 Packages

LT3080/LT3080-1 1.1A, Parallelable, Low Noise,

Low Dropout Linear Regulator

300mV Dropout Voltage (2-Supply Operation), Low Noise: 40µV

, V : 1.2V to 36V,

RMS IN

V

: 0V to 35.7V, Current-Based Reference with 1-Resistor V

Set; Directly Parallelable

OUT

(No Op Amp Required), Stable with Ceramic Caps, TO-220, SOT-223, MSOP and 3mm ×

3mm DFN Packages; LT3080-1 Version Has Integrated Internal Ballast Resistor

LT3085

500mA, Parallelable, Low Noise,

Low Dropout Linear Regulator

275mV Dropout Voltage (2-Supply Operation), Low Noise: 40µV

OUT

(No Op Amp Required), Stable with Ceramic Caps, MSOP-8 and 2mm × 3mm DFN Packages

, V : 1.2V to 36V,

RMS IN

V

: 0V to 35.7V, Current-Based Reference with 1-Resistor V

Set; Directly Parallelable

OUT

3007fa

LT 1114 REV A • PRINTED IN USA

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

20

For more information www.linear.com/LT3007

●

 LINEAR TECHNOLOGY CORPORATION 2013

(408)432-1900 FAX: (408) 434-0507 www.linear.com/LT3007


型号：	LT3007ITS8-3.3#PBF
厂家：	ADI
描述：	LT3007 Series - 3µA IQ, 20mA, 45V Low Dropout Fault Tolerant Linear Regulators; Package: SOT; Pins: 8; Temperature Range: -40°C to 85°C 光电二极管输出元件调节器
文件：	总20页 (文件大小：336K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LT3007ITS8-3.3#PBF [ADI]

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