LINEAR TECHNOLOGY LT3024 Technical data

查询LT3024供应商

FEATURES

■

Low Noise: 20µV

■

Low Quiescent Current: 30µA/Output

■

Wide Input Voltage Range: 1.8V to 20V

■

Output Current: 100mA/500mA

■

Very Low Shutdown Current: <0.1µA

■

Low Dropout Voltage: 300mV at 100mA/500mA

■

Adjustable Outputs from 1.22V to 20V

■

Stable with 1µF/3.3µF Output Capacitor

■

Stable with Aluminum, Tantalum or

(10Hz to 100kHz)

RMS

Ceramic Capacitors

■

Reverse-Battery Protected

■

No Reverse Current

■

No Protection Diodes Needed

■

Overcurrent and Overtemperature Protected

■

Thermally Enhanced 16-Lead TSSOP and 12-Lead
(4mm × 3mm) DFN Packages

U

APPLICATIO S

■

Cellular Phones

■

Pagers

■

Battery-Powered Systems

■

Frequency Synthesizers

■

Wireless Modems

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

LT3024

Dual 100mA/500mA

Low Dropout, Low Noise,

Micropower Regulator

U

DESCRIPTIO

The LT®3024 is a dual, micropower, low noise, low drop­out regulator. With an external 0.01µF bypass capacitor,
output noise drops to 20µV
bandwidth. Designed for use in battery-powered systems,
the low 30µA quiescent current per output makes it an
ideal choice. In shutdown, quiescent current drops to less
than 0.1µA. Shutdown control is independent for each
output, allowing for flexibility in power management. The
device is capable of operating over an input voltage range
of 1.8V to 20V. The device can supply 100mA of output
current from Output 2 with a dropout voltage of 300mV.
Output 1 can supply 500mA of output current with a
dropout voltage of 300mV. Quiescent current is well
controlled in dropout.

The LT3024 regulator is stable with output capacitors as
low as 1µF for the 100mA output and 3.3µF for the 500mA
output. Small ceramic capacitors can be used without the
series resistance required by other regulators.

Internal protection circuitry includes reverse-battery pro­tection, current limiting, thermal limiting and reverse
current protection. The device is available as an adjustable
device with a 1.22V reference voltage. The LT3024 regu­lator is available in the thermally enhanced 16-lead TSSOP
and 12-lead, low profile (4mm × 3mm × 0.75mm) DFN
packages.

over a 10Hz to 100kHz

RMS

TYPICAL APPLICATIO

3.3V/2.5V Low Noise Regulators

OUT1

V

IN

3.7V TO
20V

1µF

IN
SHDN1
SHDN2

LT3024

GND

BYP1
ADJ1

OUT2

BYP2
ADJ2

U

0.01µF 10µF

422k

249k

0.01µF 10µF

261k

249k

3024 TA01a

3.3V AT 500mA
NOISE

20µV

RMS

2.5V AT 100mA
NOISE

20µV

RMS

V

OUT

100µV/DIV

10Hz to 100kHz Output Noise

3024 TA01b

20µV

RMS

3024f

1

LT3024

12
11
10

9
8
7

1
2
3
4
5
6

ADJ1
SHDN1
IN
IN
SHDN2
ADJ2

BYP1
OUT1
OUT1

GND
OUT2
BYP2

TOP VIEW

13

DE12 PACKAGE

12-LEAD (4mm × 3mm) PLASTIC DFN

WWWU

ABSOLUTE AXI U RATI GS

(Note 1)

IN Pin Voltage........................................................ ±20V

OUT1, OUT2 Pin Voltage ....................................... ±20V

Input-to-Output Differential Voltage.......................±20V

ADJ1, ADJ2 Pin Voltage ......................................... ±7V

BYP1, BYP2 Pin Voltage ....................................... ±0.6V

SHDN1, SHDN2 Pin Voltage ................................. ±20V

Output Short-Circut Duration.......................... Indefinite

UU

W

PACKAGE/ORDER I FOR ATIO

TOP VIEW

1

GND

2

BYP1

3

OUT1

4

OUT1

GND
OUT2
BYP2

GND

16-LEAD PLASTIC TSSOP

T

= 150°C, θJA = 38°C/W, θJC = 8°C/W

JMAX

EXPOSED PAD (PIN 17) IS GND

MUST BE SOLDERED TO PCB

5
6
7
8

FE PACKAGE

17

GND

16

ADJ1

15

SHDN1

14

IN

13

IN

12

SHDN2

11

ADJ2

10

GND

9

ORDER PART

NUMBER

LT3024EFE

FE PART

MARKING

3024EFE

Operating Junction Temperature Range

(Note 2) ............................................ –40°C to 125°C

Storage Temperature Range

FE Package ....................................... –65°C to 150°C

DE Package ...................................... –65°C to 125°C

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

ORDER PART

NUMBER

LT3024EDE

DE PART

MARKING

3024

T

= 150°C, θJA = 40°C/W, θJC = 10°C/W

JMAX

EXPOSED PAD (PIN 13) IS GND

MUST BE SOLDERED TO PCB

Consult factory for parts specified with wider operating temperature ranges.

ELECTRICAL CHARACTERISTICS

The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. (Note 2)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Minimum Input Voltage Output 2, I
(Notes 3, 11) Output 1, I

ADJ1, ADJ2 Pin Voltage VIN = 2V, I
(Notes 3, 4) Output 2, 2.3V < V

Line Regulation (Note 3) ∆VIN = 2V to 20V, I
Load Regulation (Note 3) Output 2, VIN = 2.3V, ∆I

2

= 100mA ● 1.8 2.3 V

LOAD

= 500mA ● 1.8 2.3 V

LOAD

= 1mA 1.205 1.220 1.235 V

LOAD

Output 1, 2.3V < V

V

= 2.3V, ∆I

IN

< 20V, 1mA < I

IN

< 20V, 1mA < I

IN

LOAD

Output 1, VIN = 2.3V, ∆I

V

= 2.3V, ∆I

IN

< 100mA ● 1.190 1.220 1.250 V

LOAD

< 500mA ● 1.190 1.220 1.250 V

LOAD

= 1mA ● 110 mV

= 1mA to 100mA 1 12 mV

LOAD

= 1mA to 100mA ● 25 mV

LOAD

= 1mA to 500mA 1 12 mV

LOAD

= 1mA to 500mA ● 25 mV

LOAD

3024f

LT3024

ELECTRICAL CHARACTERISTICS

The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. (Note 2)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Dropout Voltage I
(Output 2) I

VIN = V

OUT(NOMINAL)

(Notes 5, 6, 11)

Dropout Voltage I
(Output 1) I

VIN = V

OUT(NOMINAL)

(Notes 5, 6, 11)

GND Pin Current I
(Output 2) I
VIN = V

OUT(NOMINAL)

(Notes 5, 7) I

GND Pin Current I
(Output 1) I
V

= V

IN

OUT(NOMINAL)

(Notes 5, 7) I

Output Voltage Noise C

ADJ Pin Bias Current ADJ1, ADJ2 (Notes 3, 8) 30 100 nA
Shutdown Threshold V

SHDN1/SHDN2 Pin Current V
(Note 9) V

Quiescent Current in Shutdown VIN = 6V, V
Ripple Rejection VIN = 2.72V (Avg), V

Current Limit Output 2, VIN = 7V, V

Input Reverse Leakage Current VIN = –20V, V
Reverse Output Current V

(Notes 3,10)

= 1mA 0.10 0.15 V

LOAD

= 1mA ● 0.19 V

LOAD

I

= 10mA 0.17 0.22 V

LOAD

I

= 10mA ● 0.29 V

LOAD

I

= 50mA 0.24 0.31 V

LOAD

I

= 50mA ● 0.40 V

LOAD

I

= 100mA 0.30 0.35 V

LOAD

I

= 100mA ● 0.45 V

LOAD

= 10mA 0.13 0.19 V

LOAD

= 10mA ● 0.25 V

LOAD

I

= 50mA 0.17 0.22 V

LOAD

I

= 50mA ● 0.32 V

LOAD

I

= 100mA 0.20 0.34 V

LOAD

I

= 100mA ● 0.44 V

LOAD

I

= 500mA 0.30 0.35 V

LOAD

I

= 500mA ● 0.45 V

LOAD

= 0mA ● 20 45 µA

LOAD

= 1mA ● 55 90 µA

LOAD

I

= 10mA ● 230 400 µA

LOAD

= 50mA ● 12 mA

LOAD

I

= 100mA ● 2.2 4 mA

LOAD

= 0mA ● 30 75 µA

LOAD

= 1mA ● 65 120 µA

LOAD

I

= 50mA ● 1.1 1.6 mA

LOAD

= 100mA ● 23 mA

LOAD

I

= 250mA ● 58 mA

LOAD

I

= 500mA ● 11 16 mA

LOAD

= 10µF, C

OUT

= 0.01µF, I

BYP

= Full Current, 20 µV

LOAD

RMS

BW = 10Hz to 100kHz

= Off to On ● 0.80 1.4 V

OUT

V

= On to Off ● 0.25 0.65 V

OUT

, V

SHDN1

, V

SHDN1

I

= Full Current

LOAD

Output 1, VIN = 7V, V

= 1.22V, VIN < 1.22V 5 10 µA

OUT

= 0V ● 0 0.5 µA

SHDN2

= 20V ● 1 3.0 µA

SHDN2

= 0V, V

SHDN1

RIPPLE

V

IN

OUT

= 2.3V, ∆V

OUT

VIN = 2.3V, ∆V

= 0V ● 1mA

OUT

= 0V 0.01 0.1 µA

SHDN2

= 0.5V

P-P

, f

= 120Hz, 55 65 dB

RIPPLE

= 0V 200 mA

= –0.1V ● 110 mA

OUT

= 0V 700 mA

= –0.1V ● 520 mA

OUT

Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.

Note 2: The LT3024 regulator is tested and specified under pulse load
conditions such that T

≈ TA. The LT3024 is 100% production tested at

J

TA = 25°C. Performance at –40°C and 125°C is assured by design,
characterization and correlation with statistical process controls.

Note 3: The LT3024 is tested and specified for these conditions with the
ADJ1/ADJ2 pin connected to the corresponding OUT1/OUT2 pin.

3024f

3

LT3024

ELECTRICAL CHARACTERISTICS

Note 4: Operating conditions are limited by maximum junction
temperature. The regulated output voltage specification will not apply for
all possible combinations of input voltage and output current. When
operating at maximum input voltage, the output current range must be
limited. When operating at maximum output current, the input voltage
range must be limited.

Note 5: To satisfy requirements for minimum input voltage, the LT3024 is
tested and specified for these conditions with an external resistor divider
(two 250k resistors) for an output voltage of 2.44V. The external resistor
divider will add a 5µA DC load on the output.

Note 6: 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

.

or at the minimum input voltage specification. This is the worst-case GND
pin current. The GND pin current will decrease slightly at higher input
voltages. Total GND pin current is equal to the sum of GND pin currents
from Output 1 and Output 2.

Note 8: ADJ1 and ADJ2 pin bias current flows into the pin.
Note 9: SHDN1 and SHDN2 pin current flows into the pin.
Note 10: 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 11: For the LT3024 dropout voltage will be limited by the minimum
input voltage specification under some output voltage/load conditions. See
the curve of Minimum Input Voltage in the Typical Performance
Characteristics.

Note 7: GND pin current is tested with VIN = 2.44V and a current source
load. This means the device is tested while operating in its dropout region

UW

TYPICAL PERFOR A CE CHARACTERISTICS

Output 2
Typical Dropout Voltage

500
450
400
350
300
250
200
150

DROPOUT VOLTAGE (mV)

100

50

0

0 102030

40

OUTPUT CURRENT (mA)

TJ = 125°C

TJ = 25°C

60 70 80 90 100

50

3024 G01

Output 2
Guaranteed Dropout Voltage

500

= TEST POINTS

450
400
350
300
250
200
150

DROPOUT VOLTAGE (mV)

100

50

0

0 102030

TJ ≤ 125°C

TJ ≤ 25°C

40

50

OUTPUT CURRENT (mA)

60 70 80 90 100

3024 G02

Output 2 Dropout Voltage

500
450
400
350
300
250
200
150

DROPOUT VOLTAGE (mV)

100

50

0

–50

–25

IL = 100mA

25

0

TEMPERATURE (°C)

IL = 50mA

IL = 10mA

IL = 1mA

50

100

125

3024 G03

75

Output 1
Typical Dropout Voltage

500
450
400
350
300
250
200
150

DROPOUT VOLTAGE (mV)

100

50

0

0 50 100 150

OUTPUT CURRENT (mA)

4

TJ = 125°C

TJ = 25°C

200

300 350 400 450 500

250

3024 G04

Output 1
Guaranteed Dropout Voltage

500

= TEST POINTS

450
400
350
300
250
200
150
100

50

GUARANTEED DROPOUT VOLTAGE (mV)

0

0 50 100 150

TJ ≤ 125°C

TJ ≤ 25°C

200

300 350 400 450 500

250

OUTPUT CURRENT (mA)

3024 G05

Output 1 Dropout Voltage

500
450
400
350
300
250
200
150

DROPOUT VOLTAGE (mV)

100

50

0

–50

I

= 50mA

L

–25

I

= 100mA

L

0

25

TEMPERATURE (°C)

= 250mA

I

L

IL = 10mA

50

IL = 500mA

IL = 1mA

75

100

125

3024 G06

3024f

UW

TYPICAL PERFOR A CE CHARACTERISTICS

LT3024

Quiescent Current (Per Output)

50
45
40
35
30
25
20
15

QUIESCENT CURRENT (µA)

10

5
0

VIN = 6V

= 250k, IL = 5µA

R

L

–50

V

= V

SHDN

IN

050–25 25 75 125

TEMPERATURE (°C)

Output 2 GND Pin Current

2.50

2.25

2.00

1.75

1.50

1.25

1.00

0.75

GND PIN CURRENT (mA)

0.50

0.25
0

0123

RL = 12.2Ω
I

= 100mA*

L

RL = 1.22k

= 1mA*

I

L

4

5

INPUT VOLTAGE (V)

RL = 24.4Ω
I

L

100

3024 G07

TJ = 25°C
*FOR V

= 1.22V

OUT

= 50mA*

RL = 122Ω

= 10mA*

I

L

678910

3024 G10

ADJ1 or ADJ2 Pin Voltage Quiescent Current (Per Output)

1.240
IL = 1mA

1.235

1.230

1.225

1.220

1.215

ADJ PIN VOLTAGE (V)

1.210

1.205

1.200

–25 25 75 125

–50

050

TEMPERATURE (°C)

100

3024 G08

40

TJ = 25°C

= 250k

R

L

35

30

25

20

15

10

QUIESCENT CURRENT (µA)

5

0

42 6 10 14 18

0

INPUT VOLTAGE (V)

V

SHDN

V

SHDN

8

Output 2
GND Pin Current vs I

2.50
VIN = V

2.25

2.00

1.75

1.50

1.25

1.00

0.75

GND PIN CURRENT (mA)

0.50

0.25

0

OUT(NOMINAL)

0 102030

OUTPUT CURRENT (mA)

+ 1V

40

50

LOAD

60 70 80 90 100

3024 G11

Output 1 GND Pin Current

1200

1000

800

600

400

GND PIN CURRENT (µA)

200

0

0123

RL = 24.4Ω

= 50mA*

I

L

RL = 122Ω

= 10mA*

I

L

RL = 1.22k

= 1mA*

I

L

4

INPUT VOLTAGE (V)

5

= V

IN

= 0V

12

16

20

3024 G09

TJ = 25°C

= V

V

IN

SHDN

*FOR V

= 1.22V

OUT

678910

3024 G12

Output 1 GND Pin Current

12

10

RL = 2.44Ω
I

= 500mA*

8

6

4

GND PIN CURRENT (mA)

2

0

0123

L

4

INPUT VOLTAGE (V)

TJ = 25°C

= V

V

IN

SHDN

*FOR V

5

= 1.22V

OUT

RL = 4.07Ω
I

= 300mA*

L

RL = 12.2Ω

I

= 100mA*

L

678910

3024 G13

Output 1
GND Pin Current vs I

12

VIN = V

OUT(NOMINAL)

10

8

6

4

GND PIN CURRENT (mA)

2

0

0 50 100 150

OUTPUT CURRENT (mA)

+ 1V

200

300 350 400 450 500

250

LOAD

3024 G14

SHDN1 or SHDN2 Pin Threshold
(On-to-Off)

1.0
IL = 1mA

0.9

0.8

0.7

0.6

0.5

0.4

0.3

SHDN PIN THRESHOLD (V)

0.2

0.1

0

–50

–25

0

TEMPERATURE (°C)

50

25

100

125

3024 G15

3024f

75

5