LT3009EDC-5#PBF_技术文档

LT3009 Series

A I , 20mA

3µ

Q

Low Dropout Linear Regulators

FEATURES

DESCRIPTION

The LT^®3009 Series are micropower, low dropout voltage

(LDO) linear regulators. The devices supply 20mA out-

put current with a dropout voltage of 280mV. No-load

quiescent 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.

n

Ultralow Quiescent Current: 3μA

n

Input Voltage Range: 1.6V to 20V

n

Output Current: 20mA

n

Dropout Voltage: 280mV

n

Adjustable Output (V

= V

= 600mV)

ADJ

OUT(MIN)

n

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

3.3V, 5V

The LT3009 regulators optimize stability and transient

response with low ESR ceramic capacitors, requiring a

minimum of only 1μF. 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.

Output Tolerance: 2% Over Load, Line and

Temperature

Stable with Low ESR, Ceramic Output Capacitors

(1μF minimum)

Shutdown Current: <1μA

Current Limit Protection

Reverse-Battery Protection

Thermal Limit Protection

8-Lead SC70 and 2mm × 2mm DFN Packages

n

The LT3009 Series are ideal for applications that re-

quire 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, and as an adjustable device with

an output voltage range down to the 600mV refer-

ence. The LT3009 is available in the 6-lead DFN and

8-lead SC70 packages.

APPLICATIONS

n

Low Current Battery-Powered Systems

n

Keep-Alive Power Supplies

n

Remote Monitoring

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

Utility Meters

Hotel Door Locks

TYPICAL APPLICATION

3.3V, 20mA Supply with Shutdown

Dropout Voltage/Quiescent Current

500

450

400

350

300

250

200

150

100

50

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

I

= 20mA

LOAD

V

OUT

3.3V

IN

OUT

LT3009-3.3

V

IN

20mA

3.75V TO

20V

1μF

DROPOUT

VOLTAGE

I

SHDN

GND

Q

3009 TA01a

0

–50 –25

0

25 50 75 100 125 150

TEMPERATURE (°C)

3009 TA01b

3009fb

1

LT3009 Series

ABSOLUTE MAXIMUM RATINGS

(Note 1)

Operating Junction Temperature Range (Notes 2, 3)

(E, I Grades) ......................................–40°C to 125°C

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

Lead Temperature: Soldering, 10 sec

IN Pin Voltage ......................................................... 22V

OUT Pin Voltage...................................................... 22V

Input-to-Output Differential Voltage........................ 22V

ADJ Pin Voltage ...................................................... 22V

SHDN Pin Voltage (Note 8) ..................................... 22V

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

SC8 Package Only............................................. 300°C

PIN CONFIGURATION

TOP VIEW

6

5

4

GND

SHDN

IN

ADJ/NC*

OUT

1

2

3

SHDN

GND

1

2

3

4

8

7

6

5

NC

ADJ/NC*

OUT

IN

7

OUT

SC8 PACKAGE

8-LEAD PLASTIC SC70

= 125°C, θ = 75°C/W TO 95°C/W**

DC PACKAGE

6-LEAD (2mm s 2mm) PLASTIC DFN

T

JMAX

JA

T

= 125°C, θ = 65°C/W TO 85°C/W**

JA

EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB

JMAX

*

The ADJ pin is not connected in ﬁxed output voltage versions.

** See the Applications Information section.

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

LCQX

PACKAGE DESCRIPTION

TEMPERATURE RANGE

–40°C to 125°C

LT3009EDC#PBF

LT3009EDC#TRPBF

6-Lead (2mm × 2mm) Plastic DFN

LT3009IDC#PBF

LT3009IDC#TRPBF

LCQX

LT3009EDC-1.2#PBF

LT3009IDC-1.2#PBF

LT3009EDC-1.5#PBF

LT3009IDC-1.5#PBF

LT3009EDC-1.8#PBF

LT3009IDC-1.8#PBF

LT3009EDC-2.5#PBF

LT3009IDC-2.5#PBF

LT3009EDC-3.3#PBF

LT3009IDC-3.3#PBF

LT3009EDC-5#PBF

LT3009IDC-5#PBF

LT3009EDC-1.2#TRPBF

LT3009IDC-1.2#TRPBF

LT3009EDC-1.5#TRPBF

LT3009IDC-1.5#TRPBF

LT3009EDC-1.8#TRPBF

LT3009IDC-1.8#TRPBF

LT3009EDC-2.5#TRPBF

LT3009IDC-2.5#TRPBF

LT3009EDC-3.3#TRPBF

LT3009IDC-3.3#TRPBF

LT3009EDC-5#TRPBF

LT3009IDC-5#TRPBF

LDTW

LDVB

LDKC

LDTY

LDKD

LDKF

3009fb

2

LT3009 Series

ORDER INFORMATION

LEAD FREE FINISH

LT3009ESC8#PBF

LT3009ESC8-1.2#PBF

LT3009ESC8-1.5#PBF

LT3009ESC8-1.8#PBF

LT3009ESC8-2.5#PBF

LT3009ESC8-3.3#PBF

LT3009ESC8-5#PBF

LEAD BASED FINISH

LT3009EDC

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

8-Lead Plastic SC70

TEMPERATURE RANGE

–40°C to 125°C

TEMPERATURE RANGE

–40°C to 125°C

LT3009ESC8#TRPBF

LCQY

LT3009ESC8-1.2#TRPBF LDTX

LT3009ESC8-1.5#TRPBF LDVC

LT3009ESC8-1.8#TRPBF LDKG

LT3009ESC8-2.5#TRPBF LDTZ

LT3009ESC8-3.3#TRPBF LDKH

8-Lead Plastic SC70

LT3009ESC8-5#TRPBF

TAPE AND REEL

LDKJ

8-Lead Plastic SC70

PART MARKING*

LCQX

LDTW

LDVB

LDKC

LDTY

PACKAGE DESCRIPTION

6-Lead (2mm × 2mm) Plastic DFN

8-Lead Plastic SC70

LT3009EDC#TR

LT3009IDC

LT3009IDC#TR

LT3009EDC-1.2

LT3009IDC-1.2

LT3009EDC-1.2#TR

LT3009IDC-1.2#TR

LT3009EDC-1.5#TR

LT3009IDC-1.5#TR

LT3009EDC-1.8#TR

LT3009IDC-1.8#TR

LT3009EDC-2.5#TR

LT3009IDC-2.5#TR

LT3009EDC-3.3#TR

LT3009IDC-3.3#TR

LT3009EDC-5#TR

LT3009IDC-5#TR

LT3009EDC-1.5

LT3009IDC-1.5

LT3009EDC-1.8

LT3009IDC-1.8

LT3009EDC-2.5

LT3009IDC-2.5

LDTY

LT3009EDC-3.3

LT3009IDC-3.3

LDKD

LDKF

LT3009EDC-5

LT3009IDC-5

LDKF

LT3009ESC8

LT3009ESC8#TR

LCQY

LDTX

LT3009ESC8-1.2

LT3009ESC8-1.5

LT3009ESC8-1.8

LT3009ESC8-2.5

LT3009ESC8-3.3

LT3009ESC8-5

LT3009ESC8-1.2#TR

LT3009ESC8-1.5#TR

LT3009ESC8-1.8#TR

LT3009ESC8-2.5#TR

LT3009ESC8-3.3#TR

LT3009ESC8-5#TR

8-Lead Plastic SC70

LDVC

LDKG

LDTZ

8-Lead Plastic SC70

LDKH

LDKJ

8-Lead Plastic SC70

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/

3009fb

3

LT3009 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

1.6

20

V

Regulated Output Voltage (Note 4)

LT3009-1.2: V = 1.7V, I

= 100μA

< 20mA

1.188

1.176

1.2

1.212

1.224

V

IN

LOAD

1.7V < V < 20V, 1μA < I

IN

LT3009-1.5: V = 2V, I

= 100μA

< 20mA

1.485

1.470

1.5

1.515

1.530

V

IN

LOAD

2V < V < 20V, 1μA < I

IN

LT3009-1.8: V = 2.3V, I

= 100μA

< 20mA

1.782

1.764

1.8

1.818

1.836

V

IN

LOAD

2.3V < V < 20V, 1μA < I

IN

LT3009-2.5: V = 3V, I

= 100μA

< 20mA

2.475

2.45

2.5

2.525

2.55

V

IN

LOAD

3V < V < 20V, 1μA < I

IN

LT3009-3.3: V = 3.8V, I

= 100μA

< 20mA

3.267

3.234

3.3

3.333

3.366

V

IN

LOAD

3.8V < V < 20V, 1μA < I

IN

LT3009-5: V = 5.5V, I

= 100μA

LOAD

4.950

4.900

5

5.050

5.100

V

IN

3.8V < V < 20V, 1μA < I

< 20mA

IN

LOAD

ADJ Pin Voltage (Notes 3, 4)

Line Regulation (Note 3)

V

= 1.6V, I

= 100μA

594

588

600

606

612

mV

IN

LOAD

1.6V < V < 20V, 1μA < I

< 20mA

IN

l

0.8

1.0

1.2

1.7

2.2

3.3

0.4

3.0

3.8

4.5

6.3

8.3

12.5

1.5

mV

LT3009-1.2: ΔV = 1.7V to 20V, I

= 1mA

IN

LOAD

LT3009-1.5: ΔV = 2.0V to 20V, I

IN

LT3009-1.8: ΔV = 2.3V to 20V, I

IN

LT3009-2.5: ΔV = 3.0V to 20V, I

IN

LT3009-3.3: ΔV = 3.8V to 20V, I

IN

LT3009-5: ΔV = 5.5V to 20V, I

IN

LT3009:

ΔV = 1.6V to 20V, I

l

Load Regulation (Note 3)

Dropout Voltage

LT3009-1.2: V = 1.7V, I

= 1μA to 20mA

1.4

1.8

2.1

2.9

3.9

5.8

0.7

6

7.5

9.0

12.5

16.5

25

mV

IN

LOAD

LT3009-1.5: V = 2V, I

= 1μA to 20mA

LOAD

IN

LT3009-1.8: V = 2.3V, I

= 1μA to 20mA

LOAD

IN

LT3009-2.5: V = 3V, I

= 1μA to 20mA

LOAD

LT3009-3.3: V = 3.8V, I

= 1μA to 20mA

IN

LOAD

LT3009-5:

LT3009:

V

= 5.5V, I

= 1.6V, I

IN

3

I

= 100μA

115

170

250

280

3

180

250

mV

LOAD

l

V

= V

(Notes 5, 6)

OUT(NOMINAL)

IN

I

= 1mA

250

350

mV

LOAD

I

= 10mA

310

410

mV

LOAD

I

= 20mA

350

450

mV

LOAD

Quiescent Current (Notes 6, 7)

GND Pin Current

I

= 0μA

μA

LOAD

6

l

I

= 0μA

3

6

23

200

450

6

12

50

500

1000

μA

LOAD

V

= V

+ 0.5V (Notes 6, 7)

OUT(NOMINAL)

= 100μA

= 1mA

IN

= 10mA

= 20mA

3009fb

4

LT3009 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

150

0.3

MAX

UNITS

Output Voltage Noise (Note 9)

ADJ Pin Bias Current

Shutdown Threshold

C

OUT

= 1μF, I

= 20mA, BW = 10Hz to 100kHz

μV

RMS

LOAD

l

–10

0.2

10

nA

l

V

OUT

V

OUT

= Off to On

= On to Off

0.66

0.36

1.5

V

l

SHDN Pin Current

V

SHDN

V

SHDN

= 0V, V = 20V

1

1.6

μA

IN

= 20V, V = 20V

0.5

IN

l

Quiescent Current in Shutdown

Ripple Rejection (Note 3)

V

= 6V, V

= 0V

<1

μA

IN

SHDN

– V

= 1.5V, V

= 0.5V

,

IN

OUT

= 120Hz, I

RIPPLE

P-P

f

= 20mA

LOAD

RIPPLE

LT3009

60

57

72

68

67

66

63

61

56

dB

LT3009-1.2

LT3009-1.5

LT3009-1.8

LT3009-2.5

LT3009-3.3

LT3009-5

55.5

54

52

49

44

Current Limit

V

= 20V, V

= 0

60

mA

IN

OUT

OUT(NOMINAL)

l

= V

+ 1V, ΔV

= –5%

22

OUT

Input Reverse Leakage Current

Reverse Output Current

V

= –20V, V

= 0

OUT

200

0.6

350

10

μA

IN

= 1.2V, V = 0

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 6: To satisfy minimum input voltage requirements, the LT3009

adjustable version is tested and speciﬁed for these conditions with an

external resistor divider (61.9k bottom, 280k top) which sets V to 3.3V.

OUT

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

external current is not factored into GND pin current.

Note 2: The LT3009 regulators are tested and speciﬁed under pulse load

conditions such that T ≈ T . The LT3009E is 100% tested at T = 25°C.

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

+ 0.5V and a

OUT(NOMINAL)

J

A

IN

Performance at –40°C and 125°C is assured by design, characterization

and correlation with statistical process controls. The LT3009I is guaranteed

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

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.

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

output voltage versions, an internal resistor divider will add to the GND

pin current (∼2μA for the LT3009-5, ∼1μA for the LT3009-1.2, LT3009-1.5,

LT3009-1.8, LT3009-2.5 and LT3009-3.3). See the GND Pin Current curves

in the Typical Performance Characteristics section.

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

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.

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

the output voltage equals (V – V

). For the LT3009-1.2, dropout

IN

DROPOUT

voltage will be limited by the minimum input voltage under some voltage/

load conditions.

3009fb

5

LT3009 Series

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

Dropout Voltage

Minimum Input Voltage

1.6

1.4

1.2

1

450

400

350

300

250

200

150

100

50

450

400

350

300

250

200

150

100

50

I

= 20mA

I

= 20mA

LOAD

T

= 125°C

A

10mA

100μA

20mA

1mA

T

A

= 25°C

0.8

0.6

0.4

0.2

0

–50 –25

0

25 50 75 100 125 150

–50 –25

0

25 50 75 100 125 150

0

20

5

10

15

TEMPERATURE (°C)

OUTPUT CURRENT (mA)

TEMPERATURE (°C)

3009 G03

3009 G01

3009 G02

Output Voltage

LT3009-1.2

Output Voltage

LT3009-1.5

ADJ Pin Voltage

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

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

I

= 100μA

I

= 100μA

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)

3009 G27

3009 G28

3009 G04

Output Voltage

LT3009-1.8

Output Voltage

LT3009-2.5

Output Voltage

LT3009-3.3

1.836

1.830

1.824

1.818

1.812

1.806

1.800

1.794

1.788

1.782

1.776

1.770

1.764

2.55

2.54

2.53

2.52

2.51

2.50

2.49

2.48

2.47

2.46

2.45

3.366

3.355

3.344

3.333

3.322

3.311

3.300

3.289

3.278

3.267

3.256

3.245

3.234

I

= 100μA

I

= 100μA

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)

3009 G29

3009 G05

3009 G06

3009fb

6

LT3009 Series

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

Output Voltage

LT3009-5

Adjustable Version

Quiescent Current

ADJ Pin Bias Current

6

5

4

3

2

1

0

10

8

5.100

5.075

5.050

5.025

5.000

4.975

4.950

4.925

4.900

I

= 100μA

LOAD

6

4

2

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)

3009 G09

3009 G07

3009 G08

GND Pin Current

LT3009-1.2

Quiescent Current

500

450

400

350

300

250

200

150

100

50

20

18

16

14

12

10

8

20

18

16

14

12

10

8

LT3009-1.2

LT3009-1.5

LT3009-1.8

LT3009-2.5

LT3009-3.3

LT3009-5

R

= 60Ω, I = 20mA

L

R

= 120Ω, I = 10mA

L

6

4

R

L

= 12k, I = 100μA

L

2

R = 1.2k, I = 1mA

L L

0

4

5

6

9

10

0

2

3

4

5

6

7

8

9

10

0

2

3

4

5

6

7

8

9

10

0

1

2

3

7

8

1

INPUT VOLTAGE (V)

3009 G31

3009 G10

3009 G30

3009fb

7

LT3009 Series

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

GND Pin Current

LT3009-1.5

GND Pin Current

LT3009-1.8

GND Pin Current

LT3009-2.5

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

= 125Ω, I = 20mA

L

R

= 90Ω, I = 20mA

L

R

= 75Ω, I = 20mA

L

R

= 250Ω, I = 10mA

L

R

= 150Ω, I = 10mA

L

R

= 180Ω, I = 10mA

L

R

L

= 15k, I = 100μA

L

R

L

= 18k, I = 100μA

R = 25k, I = 100μA

L L

L

R

= 1.5k, I = 1mA

L

R

= 1.8k, I = 1mA

R = 2.5k, I = 1mA

L L

L

0

2

3

4

5

6

7

8

9

10

4

9

10

4

9

10

1

0

2

3

5

6

7

8

0

2

3

5

6

7

8

1

INPUT VOLTAGE (V)

3009 G32

3009 G11

3009 G33

GND Pin Current

LT3009-5

GND Pin Current

LT3009-3.3

GND Pin Current vs I_LOAD

500

450

400

350

300

250

200

150

100

50

450

400

350

300

250

200

150

100

50

1000

100

10

R

= 250Ω, I = 20mA

L

V

= 3.8V

IN

OUT

= 3.3V

R

= 165Ω, I = 20mA

L

R

= 500Ω, I = 10mA

L

R

= 330Ω, I = 10mA

L

R

L

= 33k, I = 100μA

L

R

= 50k, I = 100μA

L

R

= 3.3k, I = 1mA

R

= 5k, I = 1mA

L L

L

0

1

0

2

3

4

5

6

7

8

9

10

1

0

2

3

4

5

6

9

10

1

7

8

0.001

0.01

0.1

1

10

100

INPUT VOLTAGE (V)

LOAD (mA)

3009 G12

3009 G13

3009 G14

3009fb

8

LT3009 Series

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

SHDN Pin Thresholds

SHDN Pin Input Current

1600

1400

1200

1000

800

600

400

200

0

500

450

400

350

300

250

200

150

100

50

V

= 20V

SHDN

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

OFF TO ON

ON TO OFF

0

–50 –25

0

25 50 75 100 125 150

0

2

4

6

8

10 12 14 16 18 20

–50 –25

0

25 50 75 100 125 150

TEMPERATURE (°C)

SHDN PIN VOLTAGE (V)

TEMPERATURE (°C)

3009 G15

3009 G16

3009 G17

Current Limit

Reverse Output Current

Input Ripple Rejection

50

45

40

35

30

25

20

15

10

5

70

60

50

40

30

20

10

0

90

80

70

60

50

40

30

20

10

OUT = ADJ = 1.2V

IN = SHDN = GND

V

LOAD

= 2V + 50mV

= 600mV

IN

OUT

RMS

V

= 20V

IN

I

= 20mA

V

= 1.6V

OUT

4.7μF

1μF

ADJ

0

–50 –25

0

25 50 75 100 125 150

–50 –25

0

25 50 75 100 125 150

10

100

1k

10k

100k

1M

FREQUENCY (Hz)

TEMPERATURE (°C)

3009 G20

3009 G19

3009 G18

3009fb

9

LT3009 Series

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

Input Ripple Rejection

Load Regulation

Output Noise Spectral Density

80

70

60

50

40

30

20

10

0

3.0

2.5

2.0

1.5

1.0

0.5

0

100

10

1

ΔI = 1μA TO 20mA

5V

L

V

= 600mV

3.3V

2.5V

1.8V

1.5V

1.2V

1V

OUT

IN

= 1.6V

0.6V

V

= V

(NOMINAL) + 1V + 0.5V

OUT P-P

IN

–0.5

–1.0

RIPPLE AT f = 120Hz

= 20mA

I

LOAD

0.1

–50 –25

0

25 50 75 100 125 150

–50 –25

0

25 50 75 100 125 150

10

100

1k

10k

100k

TEMPERATURE (°C)

FREQUENCY (Hz)

3009 G23

3009 G21

3009 G22

RMS Output Noise vs Load

Current (10Hz to 100kHz)

Transient Response

700

600

I

= 1mA TO 20mA

= 5.5V

5V

I

= 1mA TO 20mA

= 5.5V

OUT

IN

OUT

IN

V

C

V

C

= 5V

OUT

= 1μF

= 4.7μF

500

400

300

200

100

0

V

OUT

3.3V

OUT

50mV/DIV

2.5V

1.8V

I

1.5V

1.2V

I

OUT

20mA/DIV

3009 G25

3009 G26

600mV

10

500μs/DIV

0.01

0.1

1

100

0.001

I

(mA)

LOAD

3009 G24

3009fb

10

LT3009 Series

PIN FUNCTIONS ^(SC70/DFN)

SHDN (Pin 1/Pin 5): Shutdown. Pulling the SHDN pin

OUT (Pin 6/Pins 2, 3): Output. This pin supplies power to

theload.Useaminimumoutputcapacitorof1μFtoprevent

oscillations.Largeloadtransientapplicationsrequirelarger

output capacitors to limit peak voltage transients. See the

Applications Information section for more information on

output capacitance and reverse output characteristics.

low puts the LT3009 into a low power state and turns the

output off. If unused, tie the SHDN pin to V . The LT3009

IN

does 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 referenced to a negative rail.

ADJ (Pin 7/Pin 1): Adjust. This pin is the error ampliﬁer’s

inverting terminal. Its 300pA typical input bias current

ﬂows out of the pin (see curve of ADJ Pin Bias Current vs

Temperature in the Typical Performance Characteristics

section). TheADJpinvoltageis600mVreferencedtoGND

and the output voltage range is 600mV to 19.5V. This pin

is not connected in the ﬁxed output voltage versions.

GND (Pins 2, 3, 4/Pin 6): Ground. Connect the bottom

of the resistor divider that sets output voltage directly to

GND for the best regulation.

IN (Pin 5/Pin 4): Input. The IN pin supplies power to the

device. The LT3009 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 suf-

ﬁce. The LT3009 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 LT3009 acts as if a large resistor is in

series with its input. Limited reverse current ﬂows into

the LT3009 and no reverse voltage appears at the load.

The device protects both itself and the load.

NC(Pins7,8/Pin1):NoConnect.Fortheadjustablevoltage

version, Pin 8 is an NC pin in the SC70 package. For the

ﬁxed voltage versions, Pin 7 and Pin 8 are NC pins in the

SC70 package, and Pin 1 is an NC pin in the DFN package.

NC pins are not tied to any internal circuitry. They may be

ﬂoated, tied to V or tied to GND.

IN

Exposed Pad (Pin 7, DFN Package Only): Ground. The

Exposed Pad (backside) of the DFN package is an electri-

cal connection to GND. To ensure optimum performance,

solder Pin 7 to the PCB and tie directly to Pin 6.

3009fb

11

LT3009 Series

APPLICATIONS INFORMATION

The LT3009 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 280mV. The LT3009

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 LT3009 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 22V

without affecting startup or normal operation.

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 –0.7mV typical at

V

OUT

= 0.6V. At V

= 5V, load regulation is:

OUT

5V

0.6V

• (−0.7mV) = −5.83mV

Table 1 shows resistor divider values for some com-

mon output voltages with a resistor divider current of

about 1μA.

Table 1. Output Voltage Resistor Divider Values

V

R1

R2

OUT

1V

1.2V

1.5V

1.8V

2.5V

3V

604k

590k

619k

590k

402k

604k

Adjustable Operation

887k

1.18M

1.87M

2.37M

2.8M

4.32M

The LT3009 has an output voltage range of 0.6V to 19.5V.

Figure1showsthatoutputvoltageissetbytheratiooftwo

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 current, typically 300pA at 25°C, ﬂows out

of the pin. Calculate the output voltage using the formula

in Figure 1. An R1 value of 619k sets the divider current

to 0.97μA. Do not make R1’s value any greater than 619k

to minimize output voltage errors due to the ADJ pin bias

current and to insure stability under minimum load condi-

tions. In shutdown, the output turns off and the divider

current is zero. Curves of ADJ Pin Voltage vs Temperature

and ADJ Pin Bias Current vs Temperature appear in the

Typical Performance Characteristics.

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

can lead to signiﬁcant shifts in output voltage. Appro-

priate post-assembly board cleaning measures should

V

IN

OUT

ADJ

OUT

V

= 600mV* (1 + R2/R1) – (I

= 600mV

= 0.3nA at 25°C

• R2)

ADJ

OUT

ADJ

V

IN

LT3009

R2

R1

I

ADJ

OUTPUT RANGE = 0.6V to 19.5V

SHDN

GND

3009 F0

Figure 1. Adjustable Operation

3009fb

12

LT3009 Series

APPLICATIONS INFORMATION

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.

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 2 and 3. 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

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.

Output Capacitance and Transient Response

The LT3009 is stable with a wide range of output capaci-

tors.TheESRoftheoutputcapacitoraffectsstability,most

notably with small capacitors. Use a minimum output

capacitor of 1μF with an ESR of 3Ω or less to prevent os-

cillations. The LT3009 is a micropower device and output

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, each with different behavior across tempera-

ture and applied voltage. The most common dielectrics

20

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

0

8

12 14

2

4

6

10

16

50

TEMPERATURE (°C)

100 125

–50 –25

0

25

75

DC BIAS VOLTAGE (V)

3009 F02

3009 F03

Figure 2. Ceramic Capacitor DC Bias Characteristics

Figure 3. Ceramic Capacitor Temperature Characteristics

3009fb

13

LT3009 Series

APPLICATIONS INFORMATION

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.

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

Similar vibration induced behavior can masquerade as

increased output voltage noise.

Thermal Considerations

The LT3009’s maximum rated junction temperature of

125°Climitsitspower-handlingcapability.Twocomponents

comprise the power dissipated by the device:

1. Output current multiplied by the input/output voltage

differential: I

• (V – V

)

OUT

IN

OUT

2. GND pin current multiplied by the input voltage:

• V

I

GND

IN

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

rent curves in the Typical Performance Characteristics

section. Power dissipation equals the sum of the two

components listed prior.

TheLT3009regulatorhasinternalthermallimitingdesigned

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 LT3009. For surface mount devices, heat sinking is

accomplished by using the heat spreading capabilities of

thePCboardanditscoppertraces.Copperboardstiffeners

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

heat generated by power devices.

V

C

LOAD

= 0.6V

= 22μF

= 10μA

OUT

I

V

OUT

500μV/DIV

3009 F04

100ms/DIV

Figure 4. Noise Resulting from Tapping

on a Ceramic Capacitor

3009fb

14

LT3009 Series

APPLICATIONS INFORMATION

The following tables list thermal resistance for several dif- Calculating Junction Temperature

ferent board sizes and copper areas. All measurements

were taken in still air on 3/32" FR-4 board with one ounce

copper.

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 for an

application using the DC package?

Table 2: Measured Thermal Resistance for DC Package

COPPER AREA

BOARD

AREA

THERMAL RESISTANCE

(JUNCTION-TO-AMBIENT)

The power dissipated by the device is equal to:

TOPSIDE*

BACKSIDE

2

2500mm

65°C/W

70°C/W

75°C/W

80°C/W

85°C/W

I

(V

– V ) + I

(V

)

OUT(MAX) IN(MAX)

OUT

GND IN(MAX)

2

1000mm

2500mm

where,

I

2

225mm

2500mm

= 20mA

= 12.6V

2

OUT(MAX)

100mm

2500mm

2

50mm

2500mm

V

IN(MAX)

*Device is mounted on the topside.

I

at (I

= 20mA, V = 12.6V) = 0.45mA

GND

OUT IN

Table 3: Measured Thermal Resistance for SC70 Package

COPPER AREA

So,

BOARD

AREA

THERMAL RESISTANCE

P = 20mA(12.6V – 3.3V) + 0.45mA(12.6V) = 191.7mW

TOPSIDE*

BACKSIDE

(JUNCTION-TO-AMBIENT)

The thermal resistance will be in the range of 65°C/W to

85°C/W depending on the copper area. So the junction

temperature rise above ambient will be approximately

equal to:

2

2500mm

75°C/W

2

1000mm

2500mm

80°C/W

2

225mm

2500mm

85°C/W

2

100mm

2500mm

90°C/W

2

0.1917W(75°C/W) = 14.4°C

50mm

2500mm

95°C/W

*Device is mounted on the topside.

The maximum junction temperature equals the maximum

junctiontemperatureriseaboveambientplusthemaximum

ambient temperature or:

T

= 85°C + 14.4°C = 99.4°C

J(MAX)

3009fb

15

LT3009 Series

APPLICATIONS INFORMATION

Protection Features

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

and the LT3009 protects itself by thermal limiting if neces-

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

LT3009 and stops OUT from sourcing current.

The LT3009 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

exceed a junction temperature of 125°C.

The LT3009 incurs no damage if the ADJ pin is pulled

above or below ground by 22V. 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 LT3009 IN pin withstands reverse voltages of 22V. The

device limits current ﬂow to less than 1mA (typically less

than 220μA) 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 5.

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.

If the LT3009 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 LT3009 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.

The LT3009 incurs no damage if OUT is pulled below

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

pulled below ground by 22V. No current ﬂows from the

pass transistor connected to OUT. However, current ﬂows

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)

3009 F05

Figure 5. Reverse Output Current

3009fb

16

LT3009 Series

TYPICAL APPLICATIONS

Keep-Alive Power Supply

NO PROTECTION

DIODES NEEDED!

3.3V

V

IN

OUT

LT3009-3.3

12V

1μF

LOAD:

SYSTEM MONITOR,

VOLATILE MEMORY, ETC.

SHDN

GND

3009 TA02

Last-Gasp Circuit

LINE POWER

V

LINE

SENSE

12V TO 15V

D

CHARGE

LINE

INTERRUPT

DETECT

R

LIMIT

TO

5V

PWR

FAULT

MONITORING

CENTER

IN

OUT

LT3009-5

GND

SUPERCAP

1μF

3009 TA03

SHDN

GND

3009fb

17

LT3009 Series

PACKAGE DESCRIPTION

DC Package

6-Lead Plastic DFN (2mm × 2mm)

(Reference LTC DWG # 05-08-1703)

R = 0.115

TYP

0.56 p 0.05

(2 SIDES)

0.38 p 0.05

4

6

0.675 p0.05

2.50 p0.05

0.61 p0.05

(2 SIDES)

2.00 p0.10

(4 SIDES)

1.15 p0.05

PIN 1 BAR

TOP MARK

(SEE NOTE 6)

PIN 1

PACKAGE

OUTLINE

CHAMFER OF

EXPOSED PAD

(DC6) DFN 1103

3

1

0.25 p 0.05

0.50 BSC

0.75 p0.05

0.200 REF

1.37 p0.05

(2 SIDES)

1.42 p0.05

(2 SIDES)

RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS

0.00 – 0.05

BOTTOM VIEW—EXPOSED PAD

NOTE:

1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WCCD-2)

2. DRAWING NOT TO SCALE

3. ALL DIMENSIONS ARE IN MILLIMETERS

4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE

MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE

5. EXPOSED PAD SHALL BE SOLDER PLATED

6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE

TOP AND BOTTOM OF PACKAGE

3009fb

18

LT3009 Series

PACKAGE DESCRIPTION

SC8 Package

8-Lead Plastic SC70

(Reference LTC DWG # 05-08-1639 Rev Ø)

0.30

MAX

0.50

REF

1.80 – 2.20

(NOTE 4)

PIN 8

1.00 REF

INDEX AREA

(NOTE 6)

1.15 – 1.35

1.80 – 2.40

2.8 BSC 1.8 REF

(NOTE 4)

PIN 1

RECOMMENDED SOLDER PAD LAYOUT

PER IPC CALCULATOR

0.15 – 0.27

8 PLCS (NOTE 3)

0.50 BSC

0.10 – 0.40

0.80 – 1.00

0.00 – 0.10

REF

1.00 MAX

GAUGE PLANE

0.15 BSC

0.26 – 0.46

SC8 SC70 0905 REV Ø

0.10 – 0.18

(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. DETAILS OF THE PIN 1 IDENTIFIER ARE OPTIONAL,

BUT MUST BE LOCATED WITHIN THE INDEX AREA

7. EIAJ PACKAGE REFERENCE IS EIAJ SC-70 AND JEDEC MO-203 VARIATION BA

3009fb

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.

19

LT3009 Series

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

: 1.8V to 20V, V

LT1761

100mA, Low Noise Micropower LDO

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

150mA, Low Noise Micropower LDO

500mA, Low Noise Micropower LDO

V

: 1.8V to 20V, V

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

DO Q SD

IN

OUT

MS8 Package

LT1763

V

IN

: 1.8V to 20V, V

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

DO Q SD

S8 Package

LT1764/LT1764A

LTC1844

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

“A” Version Stable with Ceramic Capacitors, DD and TO220-5 Packages

150mA, Low Noise Micropower VLDO

V

IN

: 1.6V to 6.5V, V = 1.25V, V = 0.09V, I = 35μA, I < 1μA,

OUT(MIN)

RMS

DO

Q

SD

Low Noise: < 30μV

, ThinSOT Package

LT1962

300mA, Low Noise Micropower LDO

V

: 1.8V to 20V, V

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

IN

OUT(MIN) DO Q SD

RMS

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,

IN

OUT(MIN) DO Q SD

RMS

Low Noise: < 40μV

, “A” Version Stable with Ceramic Capacitors, DD, TO220-5,

SOT223 and S8 Packages

LT1964

200mA, Low Noise Micropower,

Negative LDO

V

: –2.2V to –20V, V

= 1.21V, V = 0.34V, I = 30μA, I = 3μA,

OUT(MIN) DO Q SD

IN

Low Noise: < 30μV

, Stable with Ceramic Capacitors,ThinSOT Package

RMS

LT3010

50mA, High Voltage, Micropower LDO

V

: 3V to 80V, V

= 1.275V, V = 0.3V, I = 30μA, I < 1μA,

IN

OUT(MIN) DO Q SD

Low Noise: < 100μV

, Stable with 1μF Output Capacitor, MS8E Package

RMS

LT3012/LT3012B

250mA, High Voltage, Micropower LDOs V : 4V to 80V, V

= 1.24V, V = 0.4V, I = 40μA, I < 1μA,

IN

OUT(MIN) DO Q SD

RMS

Low Noise: <100μV

, Stable with 3.3μF Output Capacitor, 12-Lead 4mm × 3mm DFN

and 16-Lead FE Packages

LT3013/LT3013B

LT3014/LT3014B

250mA, High Voltage, Micropower LDOs V : 4V to 80V, V

= 1.22V, V = 0.4V, I = 40μA, I < 1μA,

IN

OUT(MIN) DO Q SD

with PWRGD

Low Noise: < 100μV

, Stable with 3.3μF Output Capacitor,

RMS

12-Lead 4mm × 3mm DFN and 16-Lead FE Packages

20mA, High Voltage, Micropower LDO

V

IN

: 3V to 80V, V = 1.2V, V = 0.35V, I = 7μA, I < 1μA,

OUT(MIN)

DO

Q

SD

Low Noise: < 100μV

, Stable with 0.47μF Output Capacitor, SOT23-5 and

RMS

3mm × 3mm DFN Packages

LT3020

LT3021

LT3023

LT3024

LTC3025

LTC3026

LT3027

LT3028

100mA, Low Voltage VLDO

500mA, Low Voltage VLDO

V

: 0.9V to 10V, V = 0.20V, V = 0.15V, I = 120μA, I < 1μA, 3mm × 3mm DFN

IN

OUT(MIN)

DO

Q

SD

and MS8 Packages

V

: 0.9V to 10V, V

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

DO Q SD

IN

OUT(MIN)

and SO8 Packages

Dual 100mA, Low Noise,

Micropower LDO

V

: 1.8V to 20V, V

= 1.22V, V = 0.30V, I = 40μA, I < 1μA, DFN and

DO Q SD

IN

MS10 Packages

Dual 100mA/500mA, Low Noise,

Micropower LDO

V

: 1.8V to 20V, V

= 1.22V, V = 0.30V, I = 60μA, I < 1μA, DFN and TSSOP-

DO Q SD

IN

16E Packages

300mA, Low Voltage Micropower VLDO 45mV Dropout Voltage, Low Noise 110μV

, V = 1.14V to 5.5V, Low I : 54μA,

RMS IN Q

6-Lead 2mm × 2mm DFN Package

1.5A, Low Input Voltage VLDO

100mV Dropout Voltage, Low Noise 80μV

10-Lead 3mm × 3mm DFN and MS10E Packages

, V = 0.9V to 5.5V, Low I : 950μA,

RMS IN Q

Dual 100mA, Low Noise, Micropower

LDO with Independent Inputs

V

: 1.8V to 20V, V

= 1.22V, V = 0.30V, I = 40μA, I < 1μA, DFN and

DO Q SD

IN

OUT(MIN)

MS10E Packages

Dual 100mA/500mA, Low Noise,

Micropower LDO with Independent

Inputs

V

: 1.8V to 20V, V

= 1.22V, V = 0.30V, I = 60μA, I < 1μA, DFN and

DO Q SD

IN

OUT(MIN)

TSSOP-16E Packages

ThinSOT is a trademark of Linear Technology Corporation.

3009fb

LT 0908 REV B • PRINTED IN USA

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

20

●

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


型号：	LT3009EDC-5#PBF
厂家：	Linear
描述：	LT3009 - 3µA IQ, 20mA Low Dropout Linear Regulators; Package: DFN; Pins: 6; Temperature Range: -40°C to 85°C 稳压器
文件：	总20页 (文件大小：225K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LT3009EDC-5#PBF [Linear]

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