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LT3008 Series

3µA I

, 20mA, 45V

Low Dropout Linear Regulators

FEATURES

DESCRIPTION

The LT

3008 series are micropower, low dropout voltage

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

current with a dropout voltage of 300mV. 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.

The LT3008 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.

The LT3008 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, and an adjustable version with an output voltage range

of 0.6V to 44.5V. The LT3008 is available in the thermally

enhanced 6-lead DFN and 8-lead TSOT-23 packages.

LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

Ultralow Quiescent Current: 3μA

Input Voltage Range: 2.0V to 45V

Output Current: 20mA

Dropout Voltage: 300mV

Adjustable Output (V

ADJ

= V

OUT(MIN)

= 600mV)

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

Output Tolerance:

±2%

Over Load, Line and

Temperature

Stable with Low ESR, Ceramic Output Capacitors

(2.2μF Minimum)

Shutdown Current: <1μA

Current Limit Protection

Reverse-Battery Protection

Thermal Limit Protection

TSOT-23 and 2mm

2mm DFN Packages

APPLICATIONS

Automotive

Low Current Battery-Powered Systems

Keep-Alive Power Supplies

Remote Monitoring

Utility Meters

Low Power Industrial Applications

TYPICAL APPLICATION

3.3V, 20mA Supply with Shutdown

500

1μF

LT3008-3.3

SHDN

SENSE

OUT

2.2μF

OUT

3.3V

20mA

450

DROPOUT VOLTAGE (mV)

400

350

300

250

200

150

100

–50 –25

25 50 75 100 125 150

TEMPERATURE (°C)

3008 TA01b

3008fc

Dropout Voltage/Quiescent Current

LOAD

= 20mA

DROPOUT

VOLTAGE

QUIESCENT CURRENT (μA)

3.8V TO

45V

GND

3008 TA01a

LT3008 Series

ABSOLUTE MAXIMUM RATINGS

(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, 3)

E, I Grade ...........................................–40°C to 125°C

MP Grade...........................................–55°C to 125°C

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

Lead Temperature: Soldering, 10 sec

TS8 Package Only ............................................. 300°C

PIN CONFIGURATION

TOP VIEW

**SENSE/ADJ 1

OUT 2

OUT 3

6 GND

5 SHDN

4 IN

SHDN

GND

ADJ/SENSE**

OUT

DC PACKAGE

6-LEAD (2mm 2mm) PLASTIC DFN

JMAX

= 125°C,

= 65°C/W TO 85°C/W*

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

TS8 PACKAGE

8-LEAD PLASTIC TSOT-23

JMAX

= 125°C,

= 65°C/W TO 85°C/W*

* See the Applications Information Section.

** SENSE for Fixed Voltage Output Versions.

ORDER INFORMATION

LEAD FREE FINISH

LT3008EDC#PBF

LT3008IDC#PBF

LT3008EDC-1.2#PBF

LT3008IDC-1.2#PBF

LT3008EDC-1.5#PBF

LT3008IDC-1.5#PBF

LT3008EDC-1.8#PBF

LT3008IDC-1.8#PBF

LT3008EDC-2.5#PBF

LT3008IDC-2.5#PBF

LT3008EDC-3.3#PBF

LT3008IDC-3.3#PBF

LT3008EDC-5#PBF

LT3008IDC-5#PBF

LT3008ETS8#PBF

TAPE AND REEL

LT3008EDC#TRPBF

LT3008IDC#TRPBF

LT3008EDC-1.2#TRPBF

LT3008IDC-1.2#TRPBF

LT3008EDC-1.5#TRPBF

LT3008IDC-1.5#TRPBF

LT3008EDC-1.8#TRPBF

LT3008IDC-1.8#TRPBF

LT3008EDC-2.5#TRPBF

LT3008IDC-2.5#TRPBF

LT3008EDC-3.3#TRPBF

LT3008IDC-3.3#TRPBF

LT3008EDC-5#TRPBF

LT3008IDC-5#TRPBF

LT3008ETS8#TRPBF

PART MARKING*

LDPS

LFHC

LFHF

LFHH

LFHK

LFHN

LFHQ

LTDSX

PACKAGE DESCRIPTION

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

8-Lead Plastic TSOT-23

TEMPERATURE RANGE

–40°C to 125°C

3008fc

LT3008 Series

ORDER INFORMATION

LEAD FREE FINISH

LT3008ITS8#PBF

LT3008MPTS8#PBF

LT3008ETS8-1.2#PBF

LT3008ITS8-1.2#PBF

LT3008MPTS8-1.2#PBF

LT3008ETS8-1.5#PBF

LT3008ITS8-1.5#PBF

LT3008MPTS8-1.5#PBF

LT3008ETS8-1.8#PBF

LT3008ITS8-1.8#PBF

LT3008MPTS8-1.8#PBF

LT3008ETS8-2.5#PBF

LT3008ITS8-2.5#PBF

LT3008MPTS8-2.5#PBF

LT3008ETS8-3.3#PBF

LT3008ITS8-3.3#PBF

LT3008MPTS8-3.3#PBF

LT3008ETS8-5#PBF

LT3008ITS8-5#PBF

LT3008MPTS8-5#PBF

LEAD BASED FINISH

LT3008EDC

LT3008IDC

LT3008EDC-1.2

LT3008IDC-1.2

LT3008EDC-1.5

LT3008IDC-1.5

LT3008EDC-1.8

LT3008IDC-1.8

LT3008EDC-2.5

LT3008IDC-2.5

LT3008EDC-3.3

LT3008IDC-3.3

LT3008EDC-5

LT3008IDC-5

LT3008ETS8

LT3008ITS8

LT3008MPTS8

LT3008ETS8-1.2

LT3008ITS8-1.2

LT3008MPTS8-1.2

TAPE AND REEL

LT3008ITS8#TRPBF

LT3008MPTS8#TRPBF

LT3008ETS8-1.2#TRPBF

LT3008ITS8-1.2#TRPBF

LT3008MPTS8-1.2#TRPBF

LT3008ETS8-1.5#TRPBF

LT3008ITS8-1.5#TRPBF

LT3008MPTS8-1.5#TRPBF

LT3008ETS8-1.8#TRPBF

LT3008ITS8-1.8#TRPBF

LT3008MPTS8-1.8#TRPBF

LT3008ETS8-2.5#TRPBF

LT3008ITS8-2.5#TRPBF

LT3008MPTS8-2.5#TRPBF

LT3008ETS8-3.3#TRPBF

LT3008ITS8-3.3#TRPBF

LT3008MPTS8-3.3#TRPBF

LT3008ETS8-5#TRPBF

LT3008ITS8-5#TRPBF

LT3008MPTS8-5#TRPBF

TAPE AND REEL

LT3008EDC#TR

LT3008IDC#TR

LT3008EDC-1.2#TR

LT3008IDC-1.2#TR

LT3008EDC-1.5#TR

LT3008IDC-1.5#TR

LT3008EDC-1.8#TR

LT3008IDC-1.8#TR

LT3008EDC-2.5#TR

LT3008IDC-2.5#TR

LT3008EDC-3.3#TR

LT3008IDC-3.3#TR

LT3008EDC-5#TR

LT3008IDC-5#TR

LT3008ETS8#TR

LT3008ITS8#TR

LT3008MPTS8#TR

LT3008ETS8-1.2#TR

LT3008ITS8-1.2#TR

LT3008MPTS8-1.2#TR

PART MARKING*

LTDSX

LTFHD

LTFHG

LTFHJ

LTFHM

LTFHP

LTFHR

PART MARKING*

LDPS

LFHC

LFHF

LFHH

LFHK

LFHN

LFHQ

LTDSX

LTFHD

PACKAGE DESCRIPTION

8-Lead Plastic TSOT-23

PACKAGE DESCRIPTION

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

6-Lead (2mm

2mm) Plastic DFN

8-Lead Plastic TSOT-23

TEMPERATURE RANGE

–40°C to 125°C

–55°C to 125°C

–40°C to 125°C

–55°C to 125°C

–40°C to 125°C

–55°C to 125°C

–40°C to 125°C

–55°C to 125°C

–40°C to 125°C

–55°C to 125°C

–40°C to 125°C

–55°C to 125°C

–40°C to 125°C

–55°C to 125°C

TEMPERATURE RANGE

–40°C to 125°C

–55°C to 125°C

–40°C to 125°C

–55°C to 125°C

3008fc

LT3008 Series

ORDER INFORMATION

LEAD BASED FINISH

LT3008ETS8-1.5

LT3008ITS8-1.5

LT3008MPTS8-1.5

LT3008ETS8-1.8

LT3008ITS8-1.8

LT3008MPTS8-1.8

LT3008ETS8-2.5

LT3008ITS8-2.5

LT3008MPTS8-2.5

LT3008ETS8-3.3

LT3008ITS8-3.3

LT3008MPTS8-3.3

LT3008ETS8-5

LT3008ITS8-5

LT3008MPTS8-5

TAPE AND REEL

LT3008ETS8-1.5#TR

LT3008ITS8-1.5#TR

LT3008MPTS8-1.5#TR

LT3008ETS8-1.8#TR

LT3008ITS8-1.8#TR

LT3008MPTS8-1.8#TR

LT3008ETS8-2.5#TR

LT3008ITS8-2.5#TR

LT3008MPTS8-2.5#TR

LT3008ETS8-3.3#TR

LT3008ITS8-3.3#TR

LT3008MPTS8-3.3#TR

LT3008ETS8-5#TR

LT3008ITS8-5#TR

LT3008MPTS8-5#TR

PART MARKING*

LTFHG

LTFHJ

LTFHM

LTFHP

LTFHR

PACKAGE DESCRIPTION

8-Lead Plastic TSOT-23

TEMPERATURE RANGE

–40°C to 125°C

–55°C to 125°C

–40°C to 125°C

–55°C to 125°C

–40°C to 125°C

–55°C to 125°C

–40°C to 125°C

–55°C to 125°C

–40°C to 125°C

–55°C to 125°C

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/

The

denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at T

= 25°C. (Note 2)

PARAMETER

Operating Voltage

Regulated Output Voltage

LT3008-1.2: V

= 2V, I

LOAD

= 100μA

2V < V

< 45V, 1μA < I

LOAD

< 20mA

LT3008-1.5: V

= 2.05V, I

LOAD

= 100μA

2.05V < V

< 45V, 1μA < I

LOAD

< 20mA

LT3008-1.8: V

= 2.35V, I

LOAD

= 100μA

2.35V < V

< 45V, 1μA < I

LOAD

< 20mA

LT3008-2.5: V

= 3.05V, I

LOAD

= 100μA

3.05V < V

< 45V, 1μA < I

LOAD

< 20mA

LT3008-3.3: V

= 3.85V, I

LOAD

= 100μA

3.85V < V

< 45V, 1μA < I

LOAD

< 20mA

LT3008-5: V

= 5.55V, I

LOAD

= 100μA

5.55V < V

< 45V, 1μA < I

LOAD

< 20mA

ADJ Pin Voltage (Notes 3, 4)

Line Regulation (Note 3)

= 2V, I

LOAD

= 100μA

2V < V

< 45V, 1μA < I

LOAD

< 20mA

LT3008-1.2: ΔV

= 2V to 45V, I

LOAD

= 1mA

LT3008-1.5: ΔV

= 2.05V to 45V, I

LOAD

= 1mA

LT3008-1.8: ΔV

= 2.35V to 45V, I

LOAD

= 1mA

LT3008-2.5: ΔV

= 3.05V to 45V, I

LOAD

= 1mA

LT3008-3.3: ΔV

= 3.85V to 45V, I

LOAD

= 1mA

LT3008-5: ΔV

= 5.55V to 45V, I

LOAD

= 1mA

LT3008: ΔV

= 2V to 45V, I

LOAD

= 1mA

CONDITIONS

ELECTRICAL CHARACTERISTICS

MIN

1.188

1.176

1.485

1.47

1.782

1.764

2.475

2.45

3.267

3.234

4.95

4.9

594

588

TYP

1.2

1.5

1.8

2.5

3.3

600

1.2

1.5

1.8

2.5

3.3

0.6

MAX

1.212

1.224

1.515

1.53

1.818

1.836

2.525

2.55

3.333

3.366

5.05

5.1

606

612

7.5

12.5

16.5

UNITS

3008fc

LT3008 Series

The

denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at T

= 25°C. (Note 2)

PARAMETER

Load Regulation (Note 3)

CONDITIONS

LT3008-1.2: V

= 2V, I

LOAD

= 1μA to 10mA

= 2V, I

LOAD

= 1μA to 20mA

LT3008-1.5: V

= 2.05V, I

LOAD

= 1μA to 10mA

= 2.05V, I

LOAD

= 1μA to 20mA

LT3008-1.8: V

= 2.35V, I

LOAD

= 1μA to 10mA

= 2.35V, I

LOAD

= 1μA to 20mA

LT3008-2.5: V

= 3.05V, I

LOAD

= 1μA to 10mA

= 3.05V, I

LOAD

= 1μA to 20mA

LT3008-3.3: V

= 3.85V, I

LOAD

= 1μA to 10mA

= 3.85V, I

LOAD

= 1μA to 20mA

LT3008-5:

LT3008:

Dropout Voltage

= V

OUT(NOMINAL)

(Notes 5, 6)

= 5.55V, I

LOAD

= 1μA to 10mA

= 5.55V, I

LOAD

= 1μA to 20mA

= 2V, I

LOAD

= 1μA to 10mA

= 2V, I

LOAD

= 1μA to 20mA

ELECTRICAL CHARACTERISTICS

MIN

TYP

0.8

1.3

1.2

1.5

1.7

2.1

2.2

2.8

3.4

4.2

0.4

0.5

115

170

270

300

MAX

8.3

180

250

350

340

470

365

500

UNITS

μA

μV

RMS

μA

LOAD

= 100μA

LOAD

= 100μA

LOAD

= 1mA

LOAD

= 1mA

LOAD

= 10mA

LOAD

= 10mA

LOAD

= 20mA

LOAD

= 20mA

Quiescent Current (Notes 6, 7)

GND Pin Current

= V

OUT(NOMINAL)

+ 0.5V (Notes 6, 7)

LOAD

= 0μA

LOAD

= 0μA

LOAD

= 0μA

LOAD

= 100μA

LOAD

= 1mA

LOAD

= 10mA

LOAD

= 20mA

OUT

= 2.2μF, I

LOAD

= 20mA, BW = 10Hz to 100kHz

160

350

–10

0.4

0.67

0.61

0.65

500

1200

1.5

±1

Output Voltage Noise (Note 9)

ADJ Pin Bias Current

Shutdown Threshold

SHDN

Pin Current

Quiescent Current in Shutdown

Ripple Rejection (Note 3)

OUT

= Off to On

OUT

= On to Off

SHDN

= 0V, V

= 45V

SHDN

= 45V, V

= 45V

= 6V, V

SHDN

= 0V

– V

OUT

= 2V, V

RIPPLE

= 0.5V

P-P

RIPPLE

= 120Hz, I

LOAD

= 20mA

LT3008

LT3008-1.2

LT3008-1.5

LT3008-1.8

LT3008-2.5

LT3008-3.3

LT3008-5

0.25

3008fc

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