LT3015Q,LT3015Q pdf中文资料,LT3015Q引脚图,LT3015Q电路-Datasheet-电子工程世界

FEATURES

n

LT3015

1.5A, Low Noise,

Negative Linear Regulator

with Precision Current Limit

DESCRIPTION

The LT

®

3015 is a low noise, low dropout, negative linear

regulator with fast transient response. The device supplies

up to 1.5A of output current at a typical dropout voltage

of 310mV. Operating quiescent current is typically 1.1mA

and drops to < 1μA in shutdown. Quiescent current is also

well controlled in dropout. In addition to fast transient

response, the LT3015 exhibits very low output noise,

making it ideal for noise sensitive applications.

The LT3015 regulator is stable with a minimum 10μF output

capacitor. Moreover, the regulator can use small ceramic

capacitors without the necessary addition of ESR as is

common with other regulators. Internal protection circuitry

includes reverse output protection, precision current limit

with foldback and thermal limit with hysteresis.

The LT3015 is available as an adjustable device with a

–1.22V reference voltage. Packages include the 5-lead

TO-220 and DD-Pak, a thermally enhanced 12-lead MSOP

and the low profile (0.75 mm) 8-lead 3mm

×

3mm DFN.

L,

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

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

Output Current: 1.5A

Dropout Voltage: 310mV

Precision Current Limit with Foldback

Low Output Noise: 60μV

RMS

(10Hz to 100kHz)

Low Quiescent Current: 1.1mA

Precision Positive or Negative Shutdown Logic

Fast Transient Response

Wide Input Voltage Range: –1.8V to –30V

Adjustable Output Voltage Range: –1.22V to –29.5V

Controlled Quiescent Current in Dropout

< 1μA Quiescent Current in Shutdown

Stable with 10μF Output Capacitor

Stable with Ceramic, Tantalum or Aluminum Capacitors

Thermal Limit with Hysteresis

Reverse Output Protection

5-Lead TO-220 and DD-Pak, Thermally Enhanced

12-Lead MSOP and 8-Lead 3mm

×

3mm

×

0.75mm

DFN Packages

APPLICATIONS

n

Post-Regulator for Switching Supplies

Negative Logic Supplies

Low Noise Instrumentation

Industrial Supplies

Negative Complement to the LT1963A

TYPICAL APPLICATION

–5V, –1.5A, Low-Noise Regulator

GND

10μF

SHDN

V

IN

–5.5V TO

–30V

LT3015

ADJ

10.5k

1%

IN

OUT

3015 TA01

Dropout Voltage

450

400

DROPOUT VOLTAGE (mV)

350

300

250

200

DFN/MSOP

150

100

50

0

–0.2 –0.4 –0.6 –0.8 –1.0 –1.2 –1.4 –1.6

LOAD CURRENT (A)

3015 TA01a

T

J

= 25°C

3.40k

1%

10μF

V

OUT

–5V

–1.5A

DD-PAK/TO-220

3015f

1

LT3015

ABSOLUTE MAXIMUM RATINGS

(Note 1)

IN Pin Voltage .........................................................±33V

OUT Pin Voltage (Note 10) ......................................±33V

OUT to IN Differential Voltage (Note 10) ........–0.3V, 33V

ADJ Pin Voltage

(with Respect to IN Pin) (Note 10) .............–0.3V, 33V

SHDN

Pin Voltage

(with Respect to IN Pin) (Note 10) .............–0.3V, 55V

SHDN

Pin Voltage

(with Respect to GND Pin) ..........................–33V, 22V

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

Operating Junction Temperature Range (Note 9)

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, 10Sec)

MS12E Package ................................................ 300°C

Q, T Packages ................................................... 250°C

PIN CONFIGURATION

TOP VIEW

IN

SHDN

GND

1

2

3

4

9

IN

8 OUT

7 OUT

6 ADJ

5 GND

IN

SHDN

GND

1

2

3

4

5

6

TOP VIEW

12

11

10

9

8

7

OUT

ADJ

GND

13

IN

DD PACKAGE

8-LEAD (3mm 3mm) PLASTIC DFN

T

JMAX

= 125°C,

θ

JA

= 40°C/W,

θ

JC

= 7.5°C/W

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

FRONT VIEW

5

4

TAB IS IN

3

2

1

Q PACKAGE

5-LEAD PLASTIC DD-PAK

T

JMAX

= 125°C,

θ

JA

= 14°C/W,

θ

JC

= 3°C/W

OUT

ADJ

IN

GND

SHDN

MSE PACKAGE

12-LEAD PLASTIC MSOP

T

JMAX

= 125°C,

θ

JA

= 37°C/W,

θ

JC

= 10°C/W

EXPOSED PAD (PIN 13) IS IN, MUST BE SOLDERED TO PCB

FRONT VIEW

5

4

TAB IS IN

3

2

1

T PACKAGE

5-LEAD PLASTIC TO-220

T

JMAX

= 125°C,

θ

JA

= 50°C/W,

θ

JC

= 3°C/W

OUT

ADJ

IN

GND

SHDN

3015f

2

LT3015

ORDER INFORMATION

LEAD FREE FINISH

LT3015EDD#PBF

LT3015IDD#PBF

LT3015EMSE#PBF

LT3015IMSE#PBF

LT3015MPMSE#PBF

LT3015EQ#PBF

LT3015IQ#PBF

LT3015MPQ#PBF

LT3015ET#PBF

LT3015IT#PBF

LEAD BASED FINISH

LT3015EDD

LT3015IDD

LT3015EMSE

LT3015IMSE

LT3015MPMSE

LT3015EQ

LT3015IQ

LT3015MPQ

LT3015ET

LT3015IT

TAPE AND REEL

LT3015EDD#TRPBF

LT3015IDD#TRPBF

LT3015EMSE#TRPBF

LT3015IMSE#TRPBF

LT3015MPMSE#TRPBF

LT3015EQ#TRPBF

LT3015IQ#TRPBF

LT3015MPQ#TRPBF

LT3015ET#TRPBF

LT3015IT#TRPBF

TAPE AND REEL

LT3015EDD#TR

LT3015IDD#TR

LT3015EMSE#TR

LT3015IMSE#TR

LT3015MPMSE#TR

LT3015EQ#TR

LT3015IQ#TR

LT3015MPQ#TR

LT3015ET#TR

LT3015IT#TR

PART MARKING*

LFXS

3015

LT3015Q

LT3015T

PART MARKING*

LFXS

3015

LT3015Q

LT3015T

PACKAGE DESCRIPTION

8-Lead (3mm

×

3mm) Plastic DFN

8-Lead (3mm

×

3mm) Plastic DFN

12-Lead Plastic MSOP

5-Lead Plastic DD-Pak

5-Lead Plastic TO-220

PACKAGE DESCRIPTION

8-Lead (3mm

×

3mm) Plastic DFN

8-Lead (3mm

×

3mm) Plastic DFN

12-Lead Plastic MSOP

5-Lead Plastic DD-Pak

5-Lead Plastic TO-220

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

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

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

l

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T

A

= 25°C.

PARAMETER

CONDITIONS

l

ELECTRICAL CHARACTERISTICS

MIN

TYP

–1.75

–1.8

MAX

–2.3

–1.232

–1.244

6

3.8

9

UNITS

V

mV

Minimum IN Pin Voltage (Note 11) I

LOAD

= –0.5A

I

LOAD

= –1.5A

ADJ Pin Voltage (Notes 2, 3)

Line Regulation (Note 2)

Load Regulation (Note 2)

V

IN

= –2.3V, I

LOAD

= –1mA

–30V < V

IN

< –2.3V, –1.5A < I

LOAD

< –1mA

ΔV

IN

= –2.3V to –30V, I

LOAD

= –1mA

V

IN

= –2.3V, ΔI

LOAD

= –1mA to –1.5A

V

IN

= –2.3V, ΔI

LOAD

= –1mA to –1.5A

–1.208

–1.196

–1.22

2.5

2

3015f

3

LT3015

The

l

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at T

A

= 25°C.

PARAMETER

Dropout Voltage

V

IN

= V

OUT(NOMINAL)

(Notes 4, 5)

CONDITIONS

I

LOAD

= –1mA

I

LOAD

= –1mA

I

LOAD

= –100mA

I

LOAD

= –100mA

I

LOAD

= –500mA (DFN/MSOP)

I

LOAD

= –500mA (DFN/MSOP)

I

LOAD

= –500mA (DD-PAK/TO-220)

I

LOAD

= –500mA (DD-PAK/TO-220)

I

LOAD

= –1.5A (DFN/MSOP)

I

LOAD

= –1.5A (DFN/MSOP)

I

LOAD

= –1.5A (DD-PAK/TO-220)

I

LOAD

= –1.5A (DD-PAK/TO-220)

I

LOAD

= 0mA

I

LOAD

= –1mA

I

LOAD

= –100mA

I

LOAD

= –500mA

I

LOAD

= –1.5A

C

OUT

= 10μF I

LOAD

= –1.5A, BW = 10Hz to 100kHz

,

V

IN

= –2.3V

V

OUT

= Off-to-On (Positive)

V

OUT

= Off-to-On (Negative)

V

OUT

= On-to-Off (Positive)

V

OUT

= On-to-Off (Negative)

V

SHDN

= 0V

V

SHDN

= 15V

V

SHDN

= –15V

V

IN

= –6V,

SHDN

= 0V

V

IN

- V

OUT

= –1.5V (Avg), V

RIPPLE

= 0.5V

P-P

f

RIPPLE

= 120Hz, I

LOAD

= –1.5A

V

IN

= –2.3V, V

OUT

= 0V

V

IN

= –2.3V, ΔV

OUT

= 0.1V

V

IN

= 30V, V

OUT

, V

ADJ

, V

SHDN

= Open Circuit

l

ELECTRICAL CHARACTERISTICS

MIN

TYP

0.055

0.1

0.17

0.2

0.31

0.41

1.1

1.15

2.9

9.5

35

60

MAX

0.095

0.16

0.24

0.23

0.32

0.27

0.39

0.5

0.51

0.68

2.4

2.5

7.0

23

70

200

1.35

–1.06

–0.5

10

27

–4.5

6

UNITS

V

mA

μV

RMS

nA

V

μA

dB

GND Pin Current

V

IN

= V

OUT(NOMINAL)

(Notes 4, 6)

Output Voltage Noise

ADJ Pin Bias Current

(Notes 2, 7)

Shutdown Threshold (Note 11)

–200

1.07

–1.34

0.5

–1.0

30

1.21

–1.20

0.73

–0.73

0

17

–2.8

0.01

65

2.0

1.95

1.55

SHDN

Pin Current (Note 8)

Quiescent Current in Shutdown

Ripple Rejection

Current Limit

Input Reverse Leakage Current

55

1.8

1.75

2.2

2.15

1.7

A

mA

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 LT3015 is tested and specified for these conditions with the

ADJ pin connected to the OUT pin.

Note 3.

Maximum junction temperature limits operating conditions. The

regulated output voltage specification does not apply for all possible

combinations of input voltage and output current. If operating at maximum

output current, limit the input voltage range. If operating at maximum

input voltage, limit the output current range.

Note 4.

To satisfy minimum input voltage requirements, the LT3015 is

tested and specified for these conditions with an external resistor divider

(54.9k top, 49.9k bottom) for an output voltage of –2.56V. The external

resistor adds 25μA of DC load on the output.

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 is: V

IN

+ V

DROPOUT

.

Note 6.

GND pin current is tested with V

IN

= V

OUT(NOMINAL)

and a current

source load. Therefore, the device is tested while operating in dropout.

This is the worst-case GND pin current. GND pin current decreases slightly

at higher input voltages.

Note 7.

Positive ADJ pin bias current flows into the ADJ pin.

Note 8.

Positive

SHDN

pin current flows into the

SHDN

pin.

Note 9.

The LT3015 is tested and specified under pulsed load conditions

such that T

J

≅

T

A

. The LT3015E is guaranteed to meet performance

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

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

characterization, and correlation with statistical process controls. The

LT3015I is guaranteed over the full –40°C to 125°C operating junction

temperature range. The LT3015MP is 100% tested and guaranteed over

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

Note 10.

Parasitic diodes exist internally between the OUT, ADJ,

SHDN

pins

and the IN pin. Do not drive the OUT, ADJ, and

SHDN

pins more that 0.3V

below the IN pin during fault conditions, and these pins must remain at a

voltage more positive than IN during normal operation.

Note 11.

The

SHDN

threshold must be met to ensure device operation.

3015f

4

LT3015

TYPICAL PERFORMANCE CHARACTERISTICS

Typical Dropout Voltage

(DFN/MSOP)

450

400

500

DROPOUT VOLTAGE (mV)

350

300

250

200

150

100

50

0

–0.2 –0.4 –0.6 –0.8 –1 –1.2 –1.4 –1.6

OUTPUT CURRENT (A)

3015 G01

T

A

= 25°C, unless otherwise noted.

Guaranteed Dropout Voltage

(DFN/MSOP)

600

500

450

T

J

≤

125°C

400

300

T

J

≤

25°C

200

100

= TEST POINTS

0

–0.2 –0.4 –0.6 –0.8 –1 –1.2 –1.4 –1.6

OUTPUT CURRENT (A)

3015 G02

Dropout Voltage (DFN/MSOP)

400

350

300

250

200

150

100

50

I

L

= –1.5A

I

L

= –0.5A

I

L

= –0.1A

125°C

25°C

–40°C

–55°C

I

L

= –1mA

0

–75 –50 –25 0 25 50 75 100 125 150 175

TEMPERATURE (°C)

3015 G03

Typical Dropout Voltage

(DD-PAK/TO-220)

600

500

DROPOUT VOLTAGE (mV)

400

300

200

100

0

–0.2 –0.4 –0.6 –0.8 –1 –1.2 –1.4 –1.6

OUTPUT CURRENT (A)

3015 G04

Guaranteed Dropout Voltage

(DD-PAK/TO-220)

800

700

600

500

400

300

200

100

= TEST POINTS

0

–0.2 –0.4 –0.6 –0.8 –1 –1.2 –1.4 –1.6

OUTPUT CURRENT (A)

3015 G05

Dropout Voltage (DD-PAK/TO-220)

600

500

DROPOUT VOLTAGE (mV)

T

J

≤

125°C

I

L

= –1.5A

400

300

I

L

= –0.5A

200

100

I

L

= –1mA

0

–75 –50 –25 0 25 50 75 100 125 150 175

TEMPERATURE (°C)

3015 G06

T

J

≤

25°C

125°C

25°C

–40°C

–55°C

I

L

= –0.1A

Quiescent Current

–1.4

–1.2

QUIESCENT CURRENT (mA)

ADJ PIN VOLTAGE (V)

–1

–0.8

–0.6

V

IN

= –6V

–0.4 R

L

= 120kΩ, I

L

= –10μA

V

OUT

= –1.22V

–0.2

V

SHDN

= 0V

0

–75 –50 –25 0 25 50 75 100 125 150 175

TEMPERATURE (°C)

3015 G07

LT3015 ADJ Pin Voltage

–1.244

–1.238

V

IN

= –2.3V

I

L

= –1mA

OUTPUT VOLTAGE (V)

–5.100

–5.075

–5.050

–5.025

–5.000

–4.975

–4.950

–4.925

LT3015 Output Voltage

V

IN

= –5.5V

I

L

= –1mA

V

OUT

= –5V

V

SHDN

= V

IN

–1.232

–1.226

–1.220

–1.214

–1.208

–1.202

–1.196

–1.192

–75 –50 –25 0 25 50 75 100 125 150 175

TEMPERATURE (°C)

3015 G08

–4.900

–75 –50 –25 0 25 50 75 100 125 150 175

TEMPERATURE (°C)

3015 G09

3015f

5

LT3015Q

LT3015Q概述

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