LT3011IDD#PBF_技术文档

LT3010/LT3010-5

50mA, 3V to 80V

Low Dropout

Micropower Linear Regulator

DESCRIPTION

FEATURES

The LT^®3010 is a high voltage, micropower low dropout

linear regulator. The device is capable of supplying 50mA

output current with a dropout voltage of 300mV. Designed

foruseinbattery-poweredorhighvoltagesystems,thelow

quiescent current (30µA operating and 1µA in shutdown)

makes the LT3010 an ideal choice. Quiescent current is

also well controlled in dropout.

n

Wide Input Voltage Range: 3V to 80V

n

Low Quiescent Current: 30µA

n

Low Dropout Voltage: 300mV

n

Output Current: 50mA

Thermally Enhanced 8-Lead MSOP Package

No Protection Diodes Needed

Fixed Output Voltage: 5V (LT3010-5)

Adjustable Output from 1.275V to 60V (LT3010)

1µA Quiescent Current in Shutdown

Stable with 1µF Output Capacitor

Stable with Aluminum, Tantalum or Ceramic

Capacitors

Reverse-Battery Protection

No Reverse Current Flow from Output

n

Other features of the LT3010 include the ability to operate

withverysmalloutputcapacitors.Theregulatorsarestable

with only 1µF on the output while most older devices re-

quire between 10µF and 100µF for stability. Small ceramic

capacitors can be used without the necessary addition of

ESR as is common with other regulators. Internal protec-

tion circuitry includes reverse-battery protection, current

limiting, thermal limiting and reverse current protection.

n

Thermal Limiting

The device is available in a ﬁxed output voltage of 5V and

as an adjustable device with a 1.275V reference voltage.

TheLT3010regulatorisavailableinthe8-leadMSOPpack-

age with an exposed pad for enhanced thermal handling

capability.

APPLICATIONS

n

Low Current High Voltage Regulators

Regulator for Battery-Powered Systems

Telecom Applications

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

ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property

of their respective owners.

Automotive Applications

TYPICAL APPLICATION

Dropout Voltage

350

5V Supply with Shutdown

300

V

OUT

250

200

150

100

50

IN

OUT

LT3010-5

5V

50mA

V

IN

5.4V TO

80V

1µF

SHDN SENSE

GND

30105 TA01

V

(PIN 5) OUTPUT

SHDN

<0.3V

>2.0V

OFF

ON

0

10

20

30

40

50

OUTPUT CURRENT (mA)

30105 TA02

30105fe

1

LT3010/LT3010-5

ABSOLUTE MAXIMUM RATINGS

(Note 1)

PIN CONFIGURATION

IN Pin Voltage ........................................................ 80V

OUT Pin Voltage..................................................... 60V

IN to OUT Differential Voltage ................................ 80V

ADJ Pin Voltage ....................................................... 7V

SHDN Pin Input Voltage......................................... 80V

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

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

Operating Junction Temperature Range

TOP VIEW

OUT

SENSE/ADJ*

NC

1

2

3

4

8 IN

7 NC

6 NC

5 SHDN

9

GND

MS8E PACKAGE

8-LEAD PLASTIC MSOP

*SENSE FOR LT3010-5, ADJ FOR LT3010

= 125°C (LT3010E/LT3010MP), θ = 40°C/W, θ = 16°C/W†

T

JMAX

JA

JC

T

= 140°C (LT3010H), θ = 40°C/W, θ = 16°C/W†

JMAX

JA JC

SEE APPLICATIONS INFORMATION SECTION.

(Notes 3, 10, 11)

EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB

†MEASURED AT BOTTOM PAD

LT3010E............................................. –40°C to 125°C

LT3010H ............................................ –40°C to 140°C

LT3010MP.......................................... –55°C to 125°C

Lead Temperature (Soldering, 10 sec) ................. 300°C

ORDER INFORMATION

LEAD FREE FINISH

LT3010EMS8E#PBF

LT3010EMS8E-5#PBF

LT3010HMS8E#PBF

LT3010HMS8E-5#PBF

LT3010MPMS8E#PBF

LT3010MPMS8E-5#PBF

LEAD BASED FINISH

LT3010EMS8E

TAPE AND REEL

PART MARKING*

LTZF

PACKAGE DESCRIPTION

8-Lead Plastic MSOP

PACKAGE DESCRIPTION

8-Lead Plastic MSOP

TEMPERATURE RANGE

–40°C to 125°C

–40°C to 140°C

–55°C to 125°C

TEMPERATURE RANGE

–40°C to 125°C

–40°C to 140°C

–55°C to 125°C

LT3010EMS8E#TRPBF

LT3010EMS8E-5#TRPBF

LT3010HMS8E#TRPBF

LT3010HMS8E-5#TRPBF

LT3010MPMS8E#TRPBF

LT3010MPMS8E-5#TRPBF

TAPE AND REEL

LTAEF

LTCLP

LTCLQ

LTZF

LTAEF

PART MARKING*

LTZF

LT3010EMS8E#TR

LT3010EMS8E-5

LT3010EMS8E-5#TR

LT3010HMS8E #TR

LTAEF

LT3010HMS8E

LTCLP

LT3010HMS8E-5

LT3010HMS8E-5 #TR

LT3010MPMS8E#TR

LT3010MPMS8E-5#TR

LTCLQ

LT3010MPMS8E

LTZF

LT3010MPMS8E-5

LTAEF

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/

(LT3010E, LT3010MP) The l denotes the speciﬁcations which apply over

ELECTRICAL CHARACTERISTICS

the –40°C to 125°C (LT3010E) or –55°C to 125°C (LT3010MP) operating temperature range, otherwise speciﬁcations are at T_A= 25°C.

PARAMETER

CONDITIONS

LT3010

MIN

TYP

MAX

UNITS

l

Minimum Input Voltage

I

= 50mA

3

4

V

LOAD

Regulated Output Voltage

(Note 3)

LT3010-5

V

= 5.5V, I

= 1mA

LOAD

4.925 5.000 5.075

4.850 5.000 5.150

V

IN

6V < V < 80V, 1mA < I

< 50mA

IN

LOAD

ADJ Pin Voltage (Notes 2, 3)

LT3010

V

= 3V, I

= 1mA

LOAD

1.258 1.275 1.292

1.237 1.275 1.313

V

IN

4V < V < 80V, 1mA < I

IN

LOAD

30105fe

2

LT3010/LT3010-5

ELECTRICAL CHARACTERISTICS ^{(LT3010E, LT3010MP) The}l denotes the speciﬁcations which apply over

the –40°C to 125°C (LT3010E) or –55°C to 125°C (LT3010MP) operating temperature range, otherwise speciﬁcations are at T_A= 25°C.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

l

Line Regulation

LT3010-5

ΔV = 5.5V to 80V, I

IN

= 1mA

LOAD

3

15

13

mV

IN

LT3010 (Note 2) ΔV = 3V to 80V, I

= 1mA

LOAD

Load Regulation

LT3010-5

V

= 6V, ΔI

= 1mA to 50mA

25

50

90

mV

IN

LOAD

l

LT3010 (Note 2)

V

= 4V, ΔI

= 1mA to 50mA

10

20

32

mV

IN

LOAD

Dropout Voltage

I

= 1mA

100

200

300

150

190

mV

LOAD

V

= V

OUT(NOMINAL)

IN

(Notes 4, 5)

I

= 10mA

260

350

mV

LOAD

I

= 50mA

370

550

mV

LOAD

l

GND Pin Current

I

= 0mA

= 1mA

= 10mA

= 50mA

30

100

400

1.8

60

180

700

3.3

µA

LOAD

V

= V

OUT(NOMINAL)

IN

(Notes 4, 6)

µA

mA

Output Voltage Noise

ADJ Pin Bias Current

Shutdown Threshold

C

= 10µF, I

= 50mA, BW = 10Hz to 100kHz

100

50

µV

RMS

OUT

LOAD

(Note 7)

100

2

nA

l

V

= Off to On

= On to Off

1.3

1.1

V

OUT

0.3

SHDN Pin Current

(Note 8)

V

SHDN

V

SHDN

= 0V

= 6V

0.5

0.1

2

0.5

µA

Quiescent Current in Shutdown

Ripple Rejection

V

= 6V, V

= 0V

SHDN

1

5

µA

IN

LT3010

LT3010-5

V

= 7V(Avg), V

= 0.5V , f

= 120Hz, I

= 50mA

65

60

75

68

dB

IN

RIPPLE

= 0.5V , f

RIPPLE P-P RIPPLE

P-P RIPPLE

LOAD

V

IN

Current Limit

V

= 7V, V

= 0V

OUT

140

mA

IN

l

LT3010-5

LT3010 (Note 2)

V

= 6V, ΔV

= 4V, ΔV

= –0.1V

60

IN

OUT

l

Input Reverse Leakage Current

V

= –80V, V

= 0V

OUT

6

mA

IN

Reverse Output Current

(Note 9)

LT3010-5

LT3010 (Note 2)

V

= 5V, V < 5V

10

8

20

15

µA

OUT

IN

= 1.275V, V < 1.275V

IN

(LT3010H) The l denotes the speciﬁcations which apply over the –40°C to 140°C operating temperature range, otherwise

speciﬁcations are at T_A= 25°C.

PARAMETER

CONDITIONS

LT3010

MIN

TYP

MAX UNITS

l

Minimum Input Voltage

I

= 50mA

3

4.25

V

LOAD

Regulated Output Voltage

(Note 3)

LT3010-5

V

= 5.5V, I

= 1mA

LOAD

4.925 5.000 5.075

4.825 5.000 5.15

V

IN

6V < V < 80V, 1mA < I

< 50mA

LOAD

IN

ADJ Pin Voltage (Notes 2, 3)

LT3010

V

= 3V, I

= 1mA

LOAD

1.258 1.275 1.292

1.230 1.275 1.313

V

IN

4.25V < V < 80V, 1mA < I

< 50mA

LOAD

IN

l

Line Regulation

LT3010-5

ΔV = 5.5V to 80V, I

IN

= 1mA

LOAD

3

20

15

mV

IN

LT3010 (Note 2) ΔV = 3V to 80V, I

= 1mA

LOAD

Load Regulation

LT3010-5

V

= 6V, ΔI

= 1mA to 50mA

25

50

mV

IN

LOAD

l

100

LT3010 (Note 2)

V

= 4V, ΔI

= 1mA to 50mA

10

20

45

mV

IN

LOAD

= 4.25V, ΔI

= 1mA to 50mA

LOAD

30105fe

3

LT3010/LT3010-5

ELECTRICAL CHARACTERISTICS ^{(LT3010H) The}l denotes the speciﬁcations which apply over the –40°C to

140°C operating temperature range, otherwise speciﬁcations are at T_A= 25°C.

PARAMETER

CONDITIONS

MIN

TYP

MAX UNITS

Dropout Voltage

I

= 1mA

100

150

220

mV

LOAD

V

= V

l

IN

OUT(NOMINAL)

(Notes 4, 5)

I

= 10mA

200

300

260

380

mV

LOAD

I

= 50mA

370

600

mV

LOAD

l

GND Pin Current

I

= 0mA

= 1mA

= 10mA

= 50mA

30

100

400

1.8

80

200

750

3.5

µA

LOAD

V

= V

OUT(NOMINAL)

IN

(Notes 4, 6)

µA

mA

Output Voltage Noise

ADJ Pin Bias Current

Shutdown Threshold

C

= 10µF, I

= 250mA, BW = 10Hz to 100kHz

100

50

µV

RMS

OUT

LOAD

(Note 7)

100

2

nA

l

V

= Off to On

= On to Off

1.3

0.8

V

OUT

0.3

SHDN Pin Current

(Note 8)

V

SHDN

V

SHDN

= 0V

= 6V

0.5

0.1

2

0.5

µA

Quiescent Current in Shutdown

Ripple Rejection

V

= 6V, V

= 0V

SHDN

1

5

µA

IN

LT3010

LT3010-5

V

= 7V(Avg), V

= 0.5V , f

= 120Hz, I

= 50mA

65

60

75

68

dB

IN

RIPPLE

= 0.5V , f

RIPPLE P-P RIPPLE

P-P RIPPLE

LOAD

V

IN

l

Current Limit

V

= 7V, V

= 0V

OUT

140

mA

IN

LT3010-5

LT3010 (Note 2)

V

= 6V, ΔV

= –0.1V

OUT

55

IN

OUT

= 4.25V, ΔV

= –0.1V

l

Input Reverse Leakage Current

V

= –80V, V

= 0V

OUT

6

mA

IN

Reverse Output Current

(Note 9)

LT3010-5

LT3010 (Note 2)

V

= 5V, V < 5V

10

8

20

15

µA

OUT

IN

= 1.275V, V < 1.275V

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 2: The LT3010 (adjustable version) is tested and speciﬁed for these

conditions with the ADJ pin connected to the OUT pin.

Note 3: 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 maximum input voltage, the output current range must be

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

range must be limited.

Note 4: To satisfy requirements for minimum input voltage, the LT3010

(adjustable version) is tested and speciﬁed for these conditions with an

external resistor divider (249k bottom, 392k top) for an output voltage of

3.3V. The external resistor divider will add a 5µA DC load on the output.

Note 7: ADJ pin bias current ﬂows into the ADJ pin.

Note 8: SHDN pin current ﬂows out of the SHDN pin.

Note 9: Reverse output current is tested with the IN pin grounded and the

OUT pin forced to the rated output voltage. This current ﬂows into the OUT

pin and out the GND pin.

Note 10: The LT3010E is guaranteed to meet performance speciﬁcations

from 0°C to 125°C operating junction temperature. Speciﬁcations over

the –40°C to 125°C operating junction temperature range are assured by

design, characterization and correlation with statistical process controls.

The LT3010H is tested to the LT3010H Electrical Characteristics table at

140°C operating junction temperature. The LT3010MP is 100% tested and

guaranteed over the –55°C to 125°C operating junction temperature range.

High junction temperatures degrade operating lifetimes. Operating lifetime

is derated at junction temperatures greater than 125°C.

Note 11: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 125°C (LT3010E and LT3010MP) or 140°C

(LT3010H) when overtemperature protection is active. Continuous

operation above the speciﬁed maximum operating junction temperature

may impair device reliability.

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 will be equal to (V – V

).

IN

DROPOUT

Note 6: GND pin current is tested with V = V

(nominal) and a current

IN

OUT

source load. This means the device is tested while operating in its dropout

region. This is the worst-case GND pin current. The GND pin current will

decrease slightly at higher input voltages.

30105fe

4

LT3010/LT3010-5

TYPICAL PERFORMANCE CHARACTERISTICS

Typical Dropout Voltage

Guaranteed Dropout Voltage

Dropout Voltage

500

600

500

450

400

350

300

250

200

150

100

50

= TEST POINTS

450

400

350

300

250

200

150

100

50

I

= 50mA

L

400

300

T = 125°C

J

T ≤ 125°C

J

I

= 10mA

= 1mA

L

T ≤ 25°C

J

T = 25°C

J

200

100

0

L

0

5

10 15 20 25 30 35 40 45 50

0

5

10 15 20 25 30 35 40 45 50

–50 –25

0

25 50 75 100 125 150

OUTPUT CURRENT (mA)

TEMPERATURE (°C)

OUTPUT CURRENT (mA)

30105 G02

30105 G01

30105 G03

Quiescent Current

LT3010 ADJ Pin Voltage

LT3010-5 Output Voltage

1.295

5.08

40

I

= 1mA

I

= 1mA

L

1.290

1.285

5.06

5.04

35

30

V

= V

IN

SHDN

1.280

1.275

1.270

1.265

1.260

5.02

5.00

4.98

4.96

4.94

25

20

15

10

5

V

R

> 6V

IN

L

= ∞, I = 0 (LT3010-5)

L

= 250k, I = 5µA (LT3010)

L

V

= 0V

SHDN

1.255

4.92

0

–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)

30105 G05

30105 G04

30105 G06

LT3010 Quiescent Current

LT3010-5 Quiescent Current

LT3010 GND Pin Current

50

45

40

35

30

25

20

15

10

5

200

180

160

140

120

100

80

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

T = 25°C

J

T = 25°C

J

R = ∞

L

T = 25°C

J

R

= ∞

*FOR V

= 1.275V

L

OUT

V

= V

IN

R

= 25.5Ω

= 50mA*

SHDN

L

I

R

L

= 51Ω

L

I

= 25mA*

R

L

= 127Ω

= 10mA*

L

60

I

V

= V

IN

SHDN

40

R

= 1.27k I = 1mA*

L

20

L

V

= 0V

6

SHDN

V

6

= 0V

8

SHDN

0

1

2

3

4

5

7

8

9

10

0

1

2

3

4

5

7

9

10

0

1

2

3

4

5

6

7

8

9

10

INPUT VOLTAGE (V)

30105 G07

30105 G09

30105 G08

30105fe

5

LT3010/LT3010-5

TYPICAL PERFORMANCE CHARACTERISTICS

LT3010-5 GND Pin Current

GND Pin Current vs I_LOAD

SHDN Pin Threshold

1.6

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

V

J

= V

+ 1V

OUT(NOMINAL)

T = 25°C

J

IN

T = 25°C

*FOR V

= 5V

OUT

1.4

1.2

OFF-TO-ON

ON-TO-OFF

R

I

= 100Ω

= 50mA*

L

1.0

0.8

0.6

0.4

0.2

R

L

= 200Ω

= 25mA*

L

I

R

L

= 500Ω

= 10mA*

L

I

R

= 5k, I = 1mA*

L

0

–50 –25

0

25 50 75 100 125 150

0

5

10 15 20 25 30 35 40 45 50

0

1

2

3

4

5

6

7

8

9

10

TEMPERATURE (°C)

OUTPUT CURRENT (mA)

INPUT VOLTAGE (V)

30105 G10

30105 G11

30105 G12

SHDN Pin Current

ADJ Pin Bias Current

200

180

160

140

120

100

80

0.6

0.5

0.8

T = 25°C

V

= 0V

J

SHDN

CURRENT FLOWS

0.7

0.6

OUT OF SHDN PIN

0.4

0.3

0.5

0.4

0.3

0.2

0.1

0.2

0.1

0

60

40

20

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

–50 –25

0

25 50 75 100 125 150

–50 –25

0

25 50 75 100 125 150

SHDN PIN VOLTAGE (V)

TEMPERATURE (°C)

30105 G14

30105 G15

30105 G13

Current Limit

Reverse Output Current

200

180

160

140

120

100

80

200

180

160

140

120

100

80

100

90

80

70

60

50

40

30

20

10

0

V

= 7V

V

J

= 0V

IN

OUT

T = 25°C

J

OUT

= 0V

T = 25°C

V

= 0V

IN

CURRENT FLOWS

INTO OUTPUT PIN

V

= V

(LT3010)

ADJ

SENSE

OUT

ADJ

(LT3010-5)

PIN CLAMP

(SEE APPLICATIONS

INFORMATION)

LT3010

60

40

LT3010-5

20

0

–50 –25

0

25 50 75 100 125 150

0

1

2

3

4

5

6

7

8

9

10

0

1

2

3

4

5

6

7

8

9

10

TEMPERATURE (°C)

INPUT VOLTAGE (V)

OUTPUT VOLTAGE (V)

30105 G17

30105 G18

30105 G16

30105fe

6

LT3010/LT3010-5

TYPICAL PERFORMANCE CHARACTERISTICS

Reverse Output Current

Input Ripple Rejection

100

90

80

78

76

74

72

70

68

66

64

62

60

80

V

I

= 7V + 50mV

RIPPLE

RMS

V

= 0V

= V

IN

L

IN

OUT

= 50mA

= 1.275V (LT3010)

SENSE

ADJ

70

60

= V

= 5V (LT3010-5)

80

70

50

40

30

20

10

0

C

= 10µF

OUT

60

50

40

30

20

10

0

C

= 1µF

OUT

V

L

= 7V + 0.5V RIPPLE AT f = 120Hz

P-P

LT3010-5

IN

I

= 50mA

V

= 1.275V

OUT

LT3010

25 50 75 100 125 150

TEMPERATURE (°C)

10

100

1k

10k

100k

1M

–50 –25

0

–50 –25

0

25 50 75 100 125 150

TEMPERATURE (°C)

FREQUENCY (Hz)

30105 G21

3010 G19

30105 G20

LT3010 Minimum Input Voltage

Load Regulation

Output Noise Spectral Density

10

1

4.0

0

–5

C

L

= 1µF

ΔI = 1mA TO 50mA

L

I

= 50mA

OUT

LOAD

I

= 50mA

3.5

3.0

LT3010

–10

–15

–20

–25

–30

–35

–40

–45

–50

2.5

2.0

1.5

1.0

0.5

LT3010-5

0.1

0.01

0

10

100

1k

10k

100k

–50 –25

0

25 50 75 100 125 150

–50 –25

0

25 50 75 100 125 150

FREQUENCY (Hz)

TEMPERATURE (°C)

30105 G24

30105 G22

30105 G23

LT3010-5 10Hz to 100kHz

Output Noise

LT3010-5 Transient Response

0.2

0.1

0

V

OUT

–0.1

–0.2

100µV/DIV

V

C

= 6V

IN

= 1µF CERAMIC

= 1mA TO 50mA

OUT

ΔI

LOAD

50

25

0

30105 G25

1ms/DIV

C

L

= 1µF

OUT

I

= 50mA

0

200

400

600

800

1000

TIME (µs)

30105 G26

30105fe

7

LT3010/LT3010-5

PIN FUNCTIONS

OUT(Pin1):Output.Theoutputsuppliespowertotheload.

A minimum output capacitor of 1µF is required to prevent

oscillations. Larger output capacitors will be required for

applications with large transient loads to limit peak volt-

age transients. See the Applications Information section

for more information on output capacitance and reverse

output characteristics.

in the Typical Performance Characteristics). The ADJ pin

voltage is 1.275V referenced to ground, and the output

voltage range is 1.275V to 60V.

NC (Pins 3, 6, 7): No Connection. May be ﬂoated, tied to

IN or tied to GND.

GND(Pin4, Pin9):Ground. Theexposedbackside(pin 9)

of the package is an electrical connection for GND. As

such, to ensure optimum device operation, pin 9 must be

connected directly to pin 4 on the PC board.

SENSE (Pin 2): Sense. For the LT3010-5, the SENSE pin

is the input to the error ampliﬁer. Optimum regulation will

be obtained at the point where the SENSE pin is connected

to the OUT pin of the regulator. In critical applications,

SHDN (Pin 5): Shutdown. The SHDN pin is used to put

the LT3010 into a low power shutdown state. The output

will be off when the SHDN pin is pulled low. The SHDN

pin can be driven either by 5V logic or open-collector logic

withapull-upresistor. Thepull-upresistorisonlyrequired

to supply the pull-up current of the open-collector gate,

normally several microamperes. If unused, the SHDN pin

small voltage drops are caused by the resistance (R ) of

P

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 Connec-

tion). Note that the voltage drop across the external PC

traces will add to the dropout voltage of the regulator.

The SENSE pin bias current is 10µA at the nominal rated

output voltage.

must be tied to a logic high or V .

IN

IN (Pin 8): Input. Power is supplied to the device through

the IN pin. A bypass capacitor is required on this pin 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 1µF to 10µF is sufﬁcient. The

LT3010isdesignedtowithstandreversevoltagesontheIN

pin with respect to ground and the OUT pin. In the case of

a reversed input, which can happen if a battery is plugged

in backwards, the LT3010 will act as if there is a diode in

series with its input. There will be no reverse current ﬂow

into the LT3010 and no reverse voltage will appear at the

load. The device will protect both itself and the load.

ADJ (Pin 2): Adjust. For the adjustable LT3010, this is the

input to the error ampliﬁer. This pin is internally clamped

to 7V. It has a bias current of 50nA which ﬂows into the

pin (see curve of ADJ Pin Bias Current vs Temperature

R

P

8

5

1

2

IN

OUT

LT3010

+

SHDN SENSE

GND

LOAD

V

IN

4, 9

30105 F01

Figure 1. Kelvin Sense Connection

30105fe

8

LT3010/LT3010-5

APPLICATIONS INFORMATION

The LT3010 is a 50mA high voltage low dropout regulator

with micropower quiescent current and shutdown. The

device is capable of supplying 50mA at a dropout voltage

of 300mV. The low operating quiescent current (30µA)

drops to 1µA in shutdown. In addition to the low quies-

cent current, the LT3010 incorporates several protection

features which make it ideal for use in battery-powered

systems. The device is protected against both reverse

input and reverse output voltages. In battery backup ap-

plications where the output can be held up by a backup

batterywhentheinputispulledtoground, theLT3010acts

like it has a diode in series with its output and prevents

reverse current ﬂow.

The adjustable device is tested and speciﬁed with the

ADJ pin tied to the OUT pin and a 5µA DC load (unless

otherwisespeciﬁed)foranoutputvoltageof1.275V.Speci-

ﬁcations for output voltages greater than 1.275V will be

proportional to the ratio of the desired output voltage to

1.275V;(V /1.275V).Forexample,loadregulationforan

OUT

output current change of 1mA to 50mA is –10mV typical

at V

= 1.275V. At V

= 12V, load regulation is:

OUT

ꢀ (12V/1.275V)ꢀ•ꢀ(–10mV)ꢀ=ꢀ–94mV

Output Capacitance and Transient Response

The LT3010 is designed to be stable with a wide range

of output capacitors. The ESR of the output capacitor

affects stability, most notably with small capacitors. A

minimum output capacitor of 1µF with an ESR of 3Ω or

less is recommended to prevent oscillations. The LT3010

is a micropower device and output transient response

will be a function of output capacitance. Larger values

of output capacitance decrease the peak deviations and

provideimprovedtransientresponseforlargerloadcurrent

changes. Bypass capacitors, used to decouple individual

components powered by the LT3010, will increase the

effective output capacitor value.

Adjustable Operation

TheadjustableversionoftheLT3010hasanoutputvoltage

range of 1.275V to 60V. The output voltage is set by the

ratio of two external resistors as shown in Figure 2. The

device servos the output to maintain the voltage at the

adjust pin at 1.275V referenced to ground. The current

in R1 is then equal to 1.275V/R1 and the current in R2 is

the current in R1 plus the ADJ pin bias current. The ADJ

pin bias current, 50nA at 25°C, ﬂows through R2 into the

ADJ pin. The output voltage can be calculated using the

formula in Figure 2. The value of R1 should be less than

250k to minimize errors in the output voltage caused by

the ADJ pin bias current. Note that in shutdown the output

is turned off and the divider current will be zero.

Extra consideration must be given to the use of ceramic

capacitors. Ceramic capacitors are manufactured with a

variety of dielectrics, each with different behavior across

temperature and applied voltage. The most common

dielectrics used are speciﬁed with EIA temperature char-

acteristic codes of Z5U, Y5V, X5R and X7R. The Z5U and

Y5V dielectrics are good for providing high capacitances

in a small package, but they tend to have 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 over the operating tempera-

ture range. The X5R and X7R dielectrics result in 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 avail-

able in higher values. Care still must be exercised when

using X5R and X7R capacitors; the X5R and X7R codes

only specify operating temperature range and maximum

Asmallcapacitor(C1)placedinparallelwiththetopresistor

(R2)oftheoutputdividerisnecessaryforstabilityandtran-

sientperformanceoftheadjustableLT3010.Theimpedance

of C1 at 10kHz should be less than the value of R1.

V

IN

OUT

LT3010

ADJ

OUT

+

C1

R2

R1

V

IN

GND

30105 F02

R2

R1

V

= 1.275V 1 +

+ (I )(R2)

ADJ

OUT

ADJ

(

)

= 1.275V

I

= 50nA AT 25°C

OUTPUT RANGE = 1.275V TO 60V

ADJ

Figure 2. Adjustable Operation

30105fe

9

LT3010/LT3010-5

APPLICATIONS INFORMATION

20

Thermal Considerations

BOTH CAPACITORS ARE 16V,

1210 CASE SIZE, 10µF

0

The power handling capability of the device will be lim-

ited by the maximum rated junction temperature (125°C,

LT3010E/LT3010MPor140°C,LT3010H).Thepowerdissi-

pated by the device will be made up of two components:

X5R

–20

–40

1. Output current multiplied by the input/output voltage

–60

Y5V

differential: I

•ꢀ(V – V ) and,

OUT

IN OUT

–80

2. GND pin current multiplied by the input voltage:

•ꢀV

I

–100

GND

IN

0

2

4

6

8

10 12 14 16

DC BIAS VOLTAGE (V)

The GND pin current can be found by examining the GND

Pin Current curves in the Typical Performance Character-

istics. Power dissipation will be equal to the sum of the

two components listed above.

30105 F03

Figure 3. Ceramic Capacitor DC Bias Characteristics

40

20

TheLT3010seriesregulatorshaveinternalthermallimiting

designedtoprotectthedeviceduringoverloadconditions.

For continuous normal conditions the maximum junction

temperature rating of 125°C (LT3010E/LT3010MP) or

140°C (LT3010H) must not be exceeded. It is important

to give careful consideration to all sources of thermal re-

sistancefromjunctiontoambient.Additionalheatsources

mounted nearby must also be considered.

0

X5R

–20

–40

Y5V

–60

–80

BOTH CAPACITORS ARE 16V,

1210 CASE SIZE, 10µF

For surface mount devices, heat sinking is accomplished

by using the heat spreading capabilities of the PC board

and its copper traces. Copper board stiffeners and plated

through-holes can also be used to spread the heat gener-

ated by power devices.

–100

–50 –25

0

25

50

75

100 125

TEMPERATURE (°C)

30105 F04

Figure 4. Ceramic Capacitor Temperature Characteristics

capacitancechangeovertemperature.Capacitancechange

due to DC bias with X5R and X7R capacitors is better than

Y5VandZ5Ucapacitors,butcanstillbesigniﬁcantenough

to drop capacitor values below appropriate levels. Capaci-

tor DC bias characteristics tend to improve as component

casesizeincreases, butexpectedcapacitanceatoperating

voltage should be veriﬁed.

The following table lists thermal resistance for several

different board sizes and copper areas. All measurements

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

copper.

Table 1. Measured Thermal Resistance

COPPER AREA

THERMAL RESISTANCE

TOPSIDE

BACKSIDE BOARD AREA (JUNCTION-TO-AMBIENT)

Voltage and temperature coefﬁcients are not the only

sources of problems. Some ceramic capacitors have a

piezoelectric response. A piezoelectric device generates

voltageacrossitsterminalsduetomechanicalstress,simi-

lartothewayapiezoelectricaccelerometerormicrophone

works. For a ceramic capacitor the stress can be induced

by vibrations in the system or thermal transients.

2500 sq mm 2500 sq mm 2500 sq mm

1000 sq mm 2500 sq mm 2500 sq mm

225 sq mm 2500 sq mm 2500 sq mm

100 sq mm 2500 sq mm 2500 sq mm

40°C/W

45°C/W

50°C/W

62°C/W

30105fe

10

LT3010/LT3010-5

APPLICATIONS INFORMATION

The thermal resistance junction-to-case (θ ), measured

The maximum junction temperature will then be equal to

the maximum junction temperature rise above ambient

plus the maximum ambient temperature or:

JC

at the exposed pad on the back of the die, is 16°C/W.

Continuous operation at large input/output voltage dif-

ferentials and maximum load current is not practical

due to thermal limitations. Transient operation at high

input/output differentials is possible. The approximate

thermal time constant for a 2500sq mm 3/32" FR-4 board

with maximum topside and backside area for one ounce

copper is 3 seconds. This time constant will increase as

more thermal mass is added (i.e. vias, larger board, and

other components).

T

JMAX

= 50°C + 65.5°C = 115.5°C

Example 2: Given an output voltage of 5V, an input voltage

of 48V that rises to 72V for 5ms(max) out of every 100ms,

and a 5mA load that steps to 50mA for 50ms out of every

250ms, what is the junction temperature rise above ambi-

ent? Using a 500ms period (well under the time constant

of the board), power dissipation is as follows:

ꢀ P1(48Vꢀin,ꢀ5mAꢀload)ꢀ=ꢀ5mAꢀ•ꢀ(48Vꢀ–ꢀ5V)ꢀ

Foranapplicationwithtransienthighpowerpeaks,average

power dissipation can be used for junction temperature

calculationsaslongasthepulseperiodissigniﬁcantlyless

than the thermal time constant of the device and board.

ꢀ ꢀ

+ꢀ(200µAꢀ•ꢀ48V)ꢀ=ꢀ0.23W

ꢀ P2(48Vꢀin,ꢀ50mAꢀload)ꢀ=ꢀ50mAꢀ•ꢀ(48Vꢀ–ꢀ5V)ꢀ

ꢀ ꢀ +ꢀ(1mAꢀ•ꢀ48V)ꢀ=ꢀ2.20W

ꢀ P3(72Vꢀin,ꢀ5mAꢀload)ꢀ=ꢀ5mAꢀ•ꢀ(72Vꢀ–ꢀ5V)ꢀ

Calculating Junction Temperature

ꢀ ꢀ

+ꢀ(200µAꢀ•ꢀ72V)ꢀ=ꢀ0.35W

Example 1: Given an output voltage of 5V, an input volt-

age range of 24V to 30V, an output current range of 0mA

to 50mA, and a maximum ambient temperature of 50°C,

what will the maximum junction temperature be?

ꢀ P4(72Vꢀin,ꢀ50mAꢀload)ꢀ=ꢀ50mAꢀ•ꢀ(72Vꢀ–ꢀ5V)ꢀ

ꢀ ꢀ

+ꢀ(1mAꢀ•ꢀ72V)ꢀ=ꢀ3.42W

Operation at the different power levels is as follows:

76% operation at P1, 19% for P2, 4% for P3, and

1% for P4.

The power dissipated by the device will be equal to:

I

ꢀ•ꢀ(V

– V ) + (I ꢀ•ꢀV

)

OUT(MAX)

IN(MAX)

OUT

GND

IN(MAX)

P_EFF= 76%(0.23W) + 19%(2.20W) + 4%(0.35W)

+ 1%(3.42W) = 0.64W

where:

I

= 50mA

= 30V

OUT(MAX)

With a thermal resistance in the range of 40°C/W to

62°C/W,thistranslatestoajunctiontemperatureriseabove

ambient of 26°C to 38°C.

V

IN(MAX)

I

at (I = 50mA, V = 30V) = 1mA

OUT IN

GND

So:

High Temperature Operation

ꢀ Pꢀ=ꢀ50mAꢀ•ꢀ(30Vꢀ–ꢀ5V)ꢀ+ꢀ(1mAꢀ•ꢀ30V)ꢀ=ꢀ1.28W

CaremustbetakenwhendesigningLT3010Happlicationsto

operateathighambienttemperatures.TheLT3010Hworks

at elevated temperatures but erratic operation can occur

duetounforeseenvariationsinexternalcomponents.Some

tantalum capacitors are available for high temperature

operation, but ESR is often several ohms; capacitor ESR

The thermal resistance will be in the range of 40°C/W to

62°C/W depending on the copper area. So the junction

temperature rise above ambient will be approximately

equal to:

ꢀ 1.31Wꢀ•ꢀ50°C/Wꢀ=ꢀ65.5°C

30105fe

11

LT3010/LT3010-5

APPLICATIONS INFORMATION

above 3Ω is unsuitable for use with the LT3010H. Ceramic

capacitor manufacturers (Murata, AVX, TDK, and Vishay

Vitramonatthiswriting)nowofferceramiccapacitorsthat

areratedto150°CusinganX8Rdielectric.Deviceinstability

will occur if output capacitor value and ESR are outside

design limits at elevated temperature and operating DC

voltage bias (see information on capacitor characteristics

underOutputCapacitanceandTransientResponse).Check

each passive component for absolute value and voltage

ratings over the operating temperature range.

The input of the device will withstand reverse voltages

of 80V. Current ﬂow into the device will be limited to less

than 6mA (typically less than 100µA) and no negative

voltage will appear at the output. The device will protect

both itself and the load. This provides protection against

batteries which can be plugged in backward.

The ADJ pin of the adjustable device can be pulled above

or below ground by as much as 7V without damaging the

device. If the input is left open circuit or grounded, the

ADJ pin will act like an open circuit when pulled below

ground, and like a large resistor (typically 100k) in series

with a diode when pulled above ground. If the input is

powered by a voltage source, pulling the ADJ pin below

the reference voltage will cause the device to try and force

the current limit current out of the output. This will cause

the output to go to a unregulated high voltage. Pulling

the ADJ pin above the reference voltage will turn off all

output current.

Leakages in capacitors or from solder ﬂux left after in-

sufﬁcient board cleaning adversely affects low quiescent

currentoperation.Considerjunctiontemperatureincrease

due to power dissipation in both the junction and nearby

components to ensure maximum speciﬁcations are not

violated for the LT3010H or external components.

Protection Features

TheLT3010incorporatesseveralprotectionfeatureswhich

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

dition to the normal protection features associated with

monolithicregulators,suchascurrentlimitingandthermal

limiting, thedeviceisprotectedagainstreverse-inputvolt-

ages, and reverse voltages from output to input.

In situations where the ADJ pin is connected to a resistor

dividerthatwouldpulltheADJpinaboveits7Vclampvolt-

age if the output is pulled high, the ADJ pin input current

must be limited to less than 5mA. For example, a resistor

divider is used to provide a regulated 1.5V output from the

1.22V reference when the output is forced to 60V. The top

resistor of the resistor divider must be chosen to limit the

current into the ADJ pin to less than 5mA when the ADJ

pin is at 7V. The 53V difference between the OUT and ADJ

pins divided by the 5mA maximum current into the ADJ

pin yields a minimum top resistor value of 10.6k.

Current limit protection and thermal overload protection

areintendedtoprotectthedeviceagainstcurrentoverload

conditions at the output of the device. For normal opera-

tion, the junction temperature should not exceed 125°C

(LT3010E/LT3010MP) or 140°C (LT3010H).

30105fe

12

LT3010/LT3010-5

APPLICATIONS INFORMATION

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 will follow

the curve shown in Figure 5. The rise in reverse output

current above 7V occurs from the breakdown of the 7V

clamp on the ADJ pin. With a resistor divider on the

regulator output, this current will be reduced depending

on the size of the resistor divider.

When the IN pin of the LT3010 is forced below the OUT

pin or the OUT pin is pulled above the IN pin, input cur-

rent will typically drop to less than 2µA. This can happen

if the input of the LT3010 is connected to a discharged

(low voltage) battery and the output is held up by either

a backup battery or a second regulator circuit. The state

of the SHDN pin will have no effect on the reverse output

current when the output is pulled above the input.

100

T

= 25°C

IN

A

V

90

80

70

60

50

40

30

20

10

0

= 0V

CURRENT FLOWS

INTO OUTPUT PIN

ADJ

PIN CLAMP

(SEE ABOVE)

V

= V

(LT3010)

OUT

ADJ

SENSE

(LT3010-5)

LT3010

LT3010-5

0

1

2

3

4

5

6

7

8

9

10

OUTPUT VOLTAGE (V)

30105 F05

Figure 5. Reverse Output Current

30105fe

13

LT3010/LT3010-5

TYPICAL APPLICATIONS

5V Buck Converter with Low Current Keep Alive Backup

D2

D1N914

6

L1^†

15µH

C2

0.33µF

V

BOOST

IN

OUT

4

2

5.5V*

V

SW

5V

IN

C3

4.7µF

100V

D1

TO 60V

1A/50mA

10MQ060N

LT1766

CERAMIC

15

14

10

12

SHDN

BIAS

FB

R1

C1

+

15.4k

100µF 10V

SOLID

SYNC

GND

R2

4.99k

TANTALUM

V

C

1, 8, 9, 16 11

C

1nF

8

5

1

30105 TA03

IN

OUT

LT3010-5

OPERATING

CURRENT

*FOR INPUT VOLTAGES BELOW 7.5V,

SOME RESTRICTIONS MAY APPLY

^†INCREASE L1 TO 30µH FOR LOAD

CURRENTS ABOVE 0.6A AND TO

60μH ABOVE 1A

2

SHDN

SENSE

HIGH

LOW

GND

4

Buck Converter

Efﬁciency vs Load Current

100

V

= 5V

OUT

L = 68µH

V

= 10V

= 42V

IN

90

80

70

60

50

0

0.25

0.50

0.75

1.00

1.25

LOAD CURRENT (A)

30105 TA04

30105fe

14

LT3010/LT3010-5

TYPICAL APPLICATIONS

LT3010 Telecom Application

V

IN

OUT

48V

(72V TRANSIENT)

+

LT3010-5

BACKUP

BATTERY

NO PROTECTION

DIODE NEEDED!

1µF

LOAD:

SYSTEM MONITOR

ETC

SHDN

SENSE

GND

–

30105 TA05b

OFF

ON

Constant Brightness for Indicator LED over Wide Input Voltage Range

RETURN

IN

OUT

LT3010

1µF

OFF ON

–48V

SHDN ADJ

GND

R

SET

30105 TA06

I

= 1.275V/R

LED

SET

–48V CAN VARY FROM –4V TO –80V

30105fe

15

LT3010/LT3010-5

PACKAGE DESCRIPTION

MS8E Package

8-Lead Plastic MSOP, Exposed Die Pad

(Reference LTC DWG # 05-08-1662 Rev I)

BOTTOM VIEW OF

EXPOSED PAD OPTION

1.88

(.074)

1.68

1

0.29

REF

1.88 ± 0.102

(.074 ± .004)

0.889 ± 0.127

(.035 ± .005)

(.066)

0.05 REF

DETAIL “B”

5.23

(.206)

MIN

3.20 – 3.45

(.126 – .136)

1.68 ± 0.102

CORNER TAIL IS PART OF

THE LEADFRAME FEATURE.

FOR REFERENCE ONLY

(.066 ± .004)

DETAIL “B”

8

NO MEASUREMENT PURPOSE

3.00 ± 0.102

(.118 ± .004)

(NOTE 3)

0.65

(.0256)

BSC

0.52

(.0205)

REF

0.42 ± 0.038

(.0165 ± .0015)

8

7 6 5

TYP

RECOMMENDED SOLDER PAD LAYOUT

3.00 ± 0.102

(.118 ± .004)

(NOTE 4)

4.90 ± 0.152

(.193 ± .006)

DETAIL “A”

0.254

(.010)

0° – 6° TYP

GAUGE PLANE

1

2

3

4

0.53 ± 0.152

(.021 ± .006)

1.10

(.043)

MAX

0.86

(.034)

REF

DETAIL “A”

0.18

(.007)

SEATING

PLANE

0.22 – 0.38

(.009 – .015)

TYP

0.1016 ± 0.0508

(.004 ± .002)

0.65

(.0256)

BSC

MSOP (MS8E) 0910 REV I

NOTE:

1. DIMENSIONS IN MILLIMETER/(INCH)

2. DRAWING NOT TO SCALE

3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.

MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE

4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.

INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE

5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX

6. EXPOSED PAD DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH ON E-PAD

SHALL NOT EXCEED 0.254mm (.010") PER SIDE.

30105fe

16

LT3010/LT3010-5

REVISION HISTORY ^{(Revision history begins at Rev D)}

REV

DATE

DESCRIPTION

PAGE NUMBER

D

5/10

Added MP-Grade to All Sections

Updated Related Parts List

Update MSOP Package Drawing

2 to 4, 10, 12

18

16

E

4/11

30105fe

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.

17

LT3010/LT3010-5

TYPICAL APPLICATION

LT3010 Automotive Application

IN

OUT

NO PROTECTION

DIODE NEEDED!

+

V

IN

LT3010-5

1µF

12V

1µF

LOAD: CLOCK,

SECURITY SYSTEM

ETC

(LATER 42V)

SHDN

SENSE

GND

OFF

ON

30105 TA05a

RELATED PARTS

PART NUMBER DESCRIPTION

COMMENTS

LT1676

LT1761

LT1762

LT1763

LT1766

LT1776

LT1956

LT1962

LT3011

60V, 440mA (I ), 100kHz, High Efﬁciency V : 7.4V to 60V, V

= 1.24V, I = 3.2mA, I = 2.5µA, S8 Package

OUT Q SD

OUT

IN

Step-Down DC/DC Converter

100mA, Low Noise Micropower, LDO

150mA, Low Noise Micropower, LDO

500mA, Low Noise Micropower, LDO

V : 1.8V to 20V, V

= 1.22V, V = 0.3V, I = 20µA, I = <1µA,

OUT DO Q SD

IN

Low Noise < 20µV

, Stable with 1µF Ceramic Capacitors, ThinSOT™ Package

RMS

V : 1.8V to 20V, V

= 1.22V, V = 0.3V, I = 25µA, I = <1µA,

IN

OUT

DO

Q

SD

Low Noise < 20µV

, MS8 Package

RMS

V : 1.8V to 20V, V

= 1.22V, V = 0.3V, I = 30µA, I = <1µA,

IN

OUT

DO

Q

SD

Low Noise < 20µV

, S8 Package

RMS

60V, 1.2A (I ), 200kHz, High Efﬁciency

V : 5.5V to 60V, V

IN

= 1.20V, I = 2.5mA, I = 25µA, TSSOP16/E Package

Q SD

OUT

Step-Down DC/DC Converter

40V, 550mA (I ), 200kHz, High Efﬁciency V : 7.4V to 40V, V

= 1.24V, I = 3.2mA, I = 30µA, N8, S8 Packages

Q SD

OUT

IN

Step-Down DC/DC Converter

60V, 1.2A (I ), 500kHz, High Efﬁciency

V : 5.5V to 60V, V

IN

= 1.20V, I = 2.5mA, I = 25µA, TSSOP16/E Package

Q SD

OUT

Step-Down DC/DC Converter

300mA, Low Noise Micropower, LDO

V : 1.8V to 20V, V

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

IN

OUT

DO

Q

SD

Low Noise < 20µV

, MS8 Package

RMS

50mA, High Voltage, Micropower LDO with

PWRGD

V : 3V to 80V, V : 1.275V to 60V, V = 0.3V, I = 46µA, I < 1µA, Low Noise:

IN

OUT

DO

Q

SD

<100µV

PowerGood, Stable with 1µF Output Capacitor, 3mm × 3mm DFN-10 and

RMS

Exposed MS12E Packages

LT3012

LT3013

LT3014

LT3050

250mA, 4V to 80V, Low Dropout Micropower V : 4V to 80V, V : 1.24V to 60V, V = 0.4V, I = 40µA, I < 1µA, TSSOP-16E and

IN OUT DO Q SD

Linear Regulator

4mm × 3mm DFN-12 Packages

250mA, 4V to 80V, Low Dropout Micropower V : 4V to 80V, V : 1.24V to 60V, V = 0.4V, I = 65µA, I < 1µA, PowerGood;

IN

OUT

DO

Q

SD

Linear Regulator with PWRGD

TSSOP-16E and 4mm × 3mm DFN-12 Packages

20mA, 3V to 80V, Low Dropout Micropower V : 3V to 80V (100V for 2ms, "HV" Version), V : 1.22V to 60V, V = 0.35V,

IN

OUT

DO

Linear Regulator

I = 7µA, I < 1µA, ThinSOT and 3mm × 3mm DFN-8 Packages

Q SD

100mA, Low Noise Linear Regulator with

Precision Current and Diagnostic Functions Noise: 30μV

Input Voltage Range: 2V to 45V, Quiescent Current: 50μA, Dropout Voltage: 300mV; Low

(10Hz to 100kHz), Adjustable Output: V = 600mV; Programmable

RMS

REF

Precision Current Limit: 5%, Programmable Minimum I

Monitor, Diagnostic I

OUT

Telemetry: 1/100th of I , Fault Indicator: Current Limit, Minimum I

or Thermal Limit;

OUT

Shutdown Current: < 1μA, Reverse Battery Protection, Current Limit Protection, Thermal

Limit Protection, 12-Lead 3mm × 2mm DFN and MSOP Packages

LT3060

45V V , Micropower, Low Noise, 100mA

Input Voltage Range: 1.7V to 45V, Quiescent Current: 40μA, Dropout Voltage: 300mV; Low

IN

Low Dropout Linear Regulator

Noise: 30μV

(10Hz to 100kHz), Adjustable Output: V = 600mV; Output Tolerance:

RMS REF

2% Over Load, Line and Temperature, Single Capacitor Soft-Starts Reference and

Lowers Output Noise, Shutdown Current: < 1μA, Reverse Battery Protection, Current

Limit Foldback Protection, Thermal Limit Protection, 8-Lead 2mm × 2mm DFN and

8-Lead ThinSOT Packages

30105fe

LT 0411 REV E • PRINTED IN USA

18 ^{LinearTechnology Corporation}

1630 McCarthy Blvd., Milpitas, CA 95035-7417

l

 LINEAR TECHNOLOGY CORPORATION 2003

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


型号：	LT3011IDD#PBF
厂家：	Linear
描述：	暂无描述稳压器
文件：	总18页 (文件大小：400K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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