LT3010HMS8E#TRPBF_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

n

Regulator for Battery-Powered Systems

Telecom Applications

n

L, LT, LTC and LTM are registered trademarks 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

30105fc

1

LT3010/LT3010-5

ABSOLUTE MAXIMUM RATINGS

(Note 1)

PIN CONFIGURATION

TOP VIEW

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

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), θ = 40°C/W, θ = 16°C/W†

T

JMAX

JA

JC

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

JA JC

SEE APPLICATIONS INFORMATION SECTION.

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

†MEASURED AT BOTTOM PAD

(Notes 3, 10, 11)

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

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

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

ORDER INFORMATION

LEAD FREE FINISH

LT3010EMS8E#PBF

LT3010EMS8E-5#PBF

LT3010HMS8E#PBF

LT3010HMS8E-5#PBF

LEAD BASED FINISH

LT3010EMS8E

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3010EMS8E#TRPBF

LTZF

8-Lead Plastic MSOP

PACKAGE DESCRIPTION

8-Lead Plastic MSOP

–40°C to 125°C

–40°C to 140°C

TEMPERATURE RANGE

–40°C to 125°C

–40°C to 140°C

LT3010EMS8E-5#TRPBF LTAEF

LT3010HMS8E#TRPBF LTCLP

LT3010HMS8E-5#TRPBF LTCLQ

TAPE AND REEL

PART MARKING

LT3010EMS8E#TR

LT3010EMS8E-5#TR

LT3010HMS8E #TR

LT3010HMS8E-5 #TR

LTZF

LT3010EMS8E-5

LTAEF

LTCLP

LTCLQ

LT3010HMS8E

LT3010HMS8E-5

Consult LTC Marketing for parts speciﬁed with wider operating temperature ranges.

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) The ^ldenotes the speciﬁcations which apply over the –40°C to

ELECTRICAL CHARACTERISTICS

125°C operating temperature range, otherwise speciﬁcations are at T_J= 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

l

IN

LOAD

Line Regulation

LT3010-5

LT3010 (Note 2) ΔV = 3V to 80V, I

ΔV = 5.5V to 80V, I

= 1mA

3

15

13

mV

IN

LOAD

Load Regulation

LT3010-5

V

= 6V, ΔI

= 1mA to 50mA

25

50

90

mV

IN

LOAD

l

30105fc

2

LT3010/LT3010-5

ELECTRICAL CHARACTERISTICS ^{(LT3010E) The}l denotes the speciﬁcations which apply over the –40°C to

125°C operating temperature range, otherwise speciﬁcations are at T_J= 25°C.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

LT3010 (Note 2)

V

= 4V, ΔI

= 1mA to 50mA

10

20

32

mV

IN

LOAD

l

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

60

μA

LOAD

V

= V

100

400

1.8

180

700

3.3

IN

OUT(NOMINAL)

(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

OUT

V

OUT

= Off to On

= On to Off

1.3

1.1

V

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

1

5

μA

IN

SHDN

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

IN

V

IN

= 6V, ΔV

= 4V, ΔV

= –0.1V

60

OUT

l

Input Reverse Leakage Current

V

IN

= –80V, V

= 0V

OUT

6

mA

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_J= 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

IN

LOAD

ADJ Pin Voltage (Notes 2, 3)

LT3010

V

= 3V, I

= 1mA

1.258 1.275 1.292

1.230 1.275 1.313

V

IN

LOAD

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

< 50mA

IN

LOAD

l

Line Regulation

LT3010-5

ΔV = 5.5V to 80V, I

= 1mA

3

20

15

mV

IN

LOAD

LT3010 (Note 2) ΔV = 3V to 80V, I

= 1mA

IN

LOAD

Load Regulation

LT3010-5

V

= 6V, ΔI

= 1mA to 50mA

25

50

mV

IN

LOAD

l

100

LT3010 (Note 2)

V

= 4V, ΔI

= 4.25V, ΔI

= 1mA to 50mA

10

20

45

mV

IN

LOAD

= 1mA to 50mA

LOAD

30105fc

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_J= 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

80

μA

LOAD

V

= V

100

400

1.8

200

750

3.5

IN

OUT(NOMINAL)

(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

OUT

V

OUT

= Off to On

= On to Off

1.3

0.8

V

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

1

5

μA

IN

SHDN

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

IN

V

IN

= 6V, ΔV

= –0.1V

OUT

55

= 4.25V, ΔV

= –0.1V

OUT

l

Input Reverse Leakage Current

V

IN

= –80V, V

= 0V

6

mA

OUT

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. 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) 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.

30105fc

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

L

= 50mA

400

300

T

= 125°C

J

T

≤ 125°C

≤ 25°C

J

I

= 10mA

= 1mA

L

T

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

L

= 1mA

L

1.290

1.285

5.06

5.04

35

30

V

SHDN

= V

IN

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

SHDN

= 0V

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

= ∞

T

= 25°C

R = ∞

L

T

= 25°C

J

L

J

R

*FOR V

= 1.275V

OUT

V

= V

IN

R

= 25.5Ω

= 50mA*

SHDN

L

I

R

= 51Ω

L

I

L

= 25mA*

R

L

= 127Ω

= 10mA*

L

60

I

V

SHDN

= V

IN

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

30105fc

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

T

= V

+ 1V

OUT(NOMINAL)

T

= 25°C

IN

J

= 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

L

= 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 G13

30105 G14

30105 G15

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

T

= 0V

IN

OUT

T

= 25°C

= 0V

OUT

J

IN

= 0V

= 25°C

V

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

30105fc

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

OUT

= 10μF

60

50

40

30

20

10

0

C

OUT

= 1μF

V

L

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

P-P

LT3010-5

IN

I

= 50mA

V

OUT

= 1.275V

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

30105fc

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

30105fc

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

(

)

= 1.275V

ADJ

I

= 50nA AT 25°C

OUTPUT RANGE = 1.275V TO 60V

ADJ

Figure 2. Adjustable Operation

30105fc

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 or 140°C, LT3010H). The power dissipated 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

designed to protect the device during overload condi-

tions. For continuous normal conditions the maximum

junction temperature rating of 125°C (LT3010E) or 140°C

(LT3010H) must not be exceeded. It is important to give

careful consideration to all sources of thermal resistance

fromjunctiontoambient.Additionalheatsourcesmounted

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

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

JC

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

30105fc

10

LT3010/LT3010-5

APPLICATIONS INFORMATION

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).

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(48V in, 5mA load) = 5mA • (48V – 5V)

+ (200μA • 48V) = 0.23W

P2(48V in, 50mA load) = 50mA • (48V – 5V)

+ (1mA • 48V) = 2.20W

Foranapplicationwithtransienthighpowerpeaks,average

power dissipation can be used for junction temperature

calculationsaslongasthepulseperiodissigniﬁcantlyless

than the thermal time constant of the device and board.

P3(72V in, 5mA load) = 5mA • (72V – 5V)

+ (200μA • 72V) = 0.35W

P4(72V in, 50mA load) = 50mA • (72V – 5V)

+ (1mA • 72V) = 3.42W

Calculating Junction Temperature

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?

Operation at the different power levels is as follows:

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

1% for P4.

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

+ 1%(3.42W) = 0.64W

The power dissipated by the device will be equal to:

I

• (V

– V ) + (I

• V

)

OUT(MAX)

IN(MAX)

OUT

GND

IN(MAX)

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

62°C/W,thistranslatestoajunctiontemperatureriseabove

ambient of 26°C to 38°C.

where:

I

= 50mA

= 30V

OUT(MAX)

V

IN(MAX)

High Temperature Operation

I

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

OUT IN

GND

Care must be taken when designing LT3010/LT3010-5

applications to operate at high ambient temperatures.

The LT3010/LT3010-5 works at elevated temperatures

but erratic operation can occur due to unforeseen varia-

tions in external components. Some tantalum capacitors

are available for high temperature operation, but ESR is

often several ohms; capacitor ESR above 3Ω is unsuit-

able for use with the LT3010/LT3010-5. Ceramic capacitor

manufacturers (Murata, AVX, TDK, and Vishay Vitramon

at this writing) now offer ceramic capacitors that are rated

to 150°C using an X8R dielectric. Device instability will

occurifoutputcapacitorvalueandESRareoutsidedesign

limits at elevated temperature and operating DC voltage

bias (see information on capacitor characteristics under

So:

P = 50mA • (30V – 5V) + (1mA • 30V) = 1.28W

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:

1.31W • 50°C/W = 65.5°C

The maximum junction temperature will then be equal to

the maximum junction temperature rise above ambient

plus the maximum ambient temperature or:

T

= 50°C + 65.5°C = 115.5°C

JMAX

30105fc

11

LT3010/LT3010-5

APPLICATIONS INFORMATION

Output Capacitance and Transient Response). Check each

passive component for absolute value and voltage ratings

over the operating temperature range.

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.

Leakagesincapacitorsorfromsolderﬂuxleftafterinsufﬁ-

cientboardcleaningadverselyaffectslowquiescentcurrent

operation. Consider junction temperature increase due to

power dissipation in both the junction and nearby compo-

nents to ensure maximum speciﬁcations are not violated

for the LT3010/LT3010H or external components.

Protection Features

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.

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.

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) or 140°C (LT3010H).

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.

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.

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

30105fc

12

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

30105fc

13

LT3010/LT3010-5

TYPICAL APPLICATIONS

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

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 TA05

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

30105fc

14

LT3010/LT3010-5

PACKAGE DESCRIPTION

MS8E Package

8-Lead Plastic MSOP

(Reference LTC DWG # 05-08-1662)

BOTTOM VIEW OF

EXPOSED PAD OPTION

2.06 ± 0.102

(.081 ± .004)

1

1.83 ± 0.102

(.072 ± .004)

0.889 ± 0.127

(.035 ± .005)

2.794 ± 0.102

(.110 ± .004)

5.23

(.206)

MIN

3.20 – 3.45

(.126 – .136)

2.083 ± 0.102

(.082 ± .004)

8

3.00 ± 0.102

(.118 ± .004)

(NOTE 3)

0.52

(.0205)

REF

0.65

(.0256)

BSC

0.42 ± 0.038

(.0165 ± .0015)

TYP

8

7 6 5

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) 0307 REV D

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

30105fc

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.

15

LT3010/LT3010-5

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

LT1020

125mA, Micropower Regulator and Comparator V : 4.5V to 36V, V

= 2.5V, V = 0.4V, I = 40μA, I = 40μA, Comparator and

IN

OUT DO Q SD

Reference, Class B Outputs, S16, PDIP14 Packages

LT1120/LT1120A 125mA, Micropower Regulator and Comparator V : 4.5V to 36V, V

= 2.5V, V = 0.4V, I = 40μA, I = 10μA, Comparator and

IN

OUT

DO

Q

SD

Reference, Logic Shutdown, Ref Sources and Sinks 2/4mA, S8, N8 Packages

LT1121/

150mA, Micropower, LDO

700mA, Micropower, LDO

V : 4.2V to 30/36V, V = 3.75V, V = 0.42V, I = 30μA, I = 16μA, Reverse

IN

OUT

DO

Q

SD

LT1121HV

Battery Protection, SOT-223, S8, Z Packages

LT1129

LT1616

LT1676

LT1761

LT1762

LT1763

V : 4.2V to 30V, V = 3.75V, V = 0.4V, I = 50μA, I = 16μA, DD, S0T-223, S8,

IN

OUT

DO

Q

SD

TO220-5, TSSOP20 Packages

25V, 500mA (I ), 1.4MHz, High Efﬁciency

V : 3.6V to 25V, V

= 1.25V, I = 1.9mA, I = <1μA, ThinSOT™ Package

Q SD

OUT

IN

OUT

Step-Down DC/DC Converter

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

V : 7.4V to 60V, V

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

Q SD

OUT

IN

OUT

Step-Down DC/DC Converter

100mA, Low Noise Micropower, LDO

V : 1.8V to 20V, V

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

IN

OUT DO Q SD

Low Noise < 20μV

, Stable with 1μF Ceramic Capacitors, ThinSOT Package

RMS

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,

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

LT1764/LT1764A 3A, Low Noise, Fast Transient Response, LDO

V : 2.7V to 20V, V

= 1.21V, V = 0.34V, I = 1mA, I = <1μA,

IN

OUT DO Q SD

Low Noise < 40μV

, “A” Version Stable with Ceramic Capacitors,

RMS

DD, TO220-5 Packages

LT1766

LT1776

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

V : 5.5V to 60V, V

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

Q SD

OUT

IN

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

OUT

Step-Down DC/DC Converter

LT1934/

LT1934-1

300mA/60mA, (I ), Constant Off-Time, High 90% Efﬁciency, V : 3.2V to 34V, V

= 1.25V, I = 14μA, I = <1μA,

OUT Q SD

OUT

IN

Efﬁciency Step-Down DC/DC Converter

ThinSOT Package

LT1956

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

V : 5.5V to 60V, V

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

OUT Q SD

OUT

IN

Step-Down DC/DC Converter

LT1962

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

LT1963/LT1963A 1.5A, Low Noise, Fast Transient Response, LDO V : 2.1V to 20V, V

= 1.21V, V = 0.34V, I = 1mA, I = <1μA,

DO Q SD

IN

OUT

Low Noise < 40μV

, “A” Version Stable with Ceramic Capacitors,

RMS

DD, TO220-5, S0T-223, S8 Packages

LT1964

200mA, Low Noise Micropower, Negative LDO

V : –1.9V to –20V, V

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

IN

OUT DO Q SD

Low Noise < 30μV

, Stable with Ceramic Capacitors, ThinSOT Package

RMS

ThinSOT is a trademark of Linear Technology Corporation.

30105fc

LT 0208 REV C • PRINTED IN USA

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

16

●

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


型号：	LT3010HMS8E#TRPBF
厂家：	Linear
描述：	LT3010/LT3010-5 - 50mA, 3V to 80V Low Dropout Micropower Linear Regulator; Package: MSOP; Pins: 8; Temperature Range: -40°C to 125°C 光电二极管输出元件调节器
文件：	总16页 (文件大小：170K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LT3010HMS8E#TRPBF [Linear]

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