LINEAR TECHNOLOGY LT3023 Technical data

LT3023

Dual 100mA,

Low Dropout, Low Noise,

Micropower Regulator

FEATURES

n

Low Noise: 20μV

n

Low Quiescent Current: 20μA/Channel

n

Wide Input Voltage Range: 1.8V to 20V

n

Output Current: 100mA/Channel

n

Very Low Shutdown Current: <0.1μA

n

Low Dropout Voltage: 300mV at 100mA

n

Adjustable Output from 1.22V to 20V

n

Stable with 1μF Output Capacitor

n

Stable with Aluminum, Tantalum or

(10Hz to 100kHz)

RMS

Ceramic Capacitors

n

Reverse Battery Protected

n

No Reverse Current

n

No Protection Diodes Needed

n

Overcurrent and Overtemperature Protected

n

Thermally Enhanced 10-Lead MSOP and DFN

Packages

APPLICATIONS

n

Cellular Phones

n

Pagers

n

Battery-Powered Systems

n

Frequency Synthesizers

n

Wireless Modems

DESCRIPTION

The LT®3023 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 20μA quiescent current per channel makes it an
ideal choice. In shutdown, quiescent current drops to less
than 0.1μA. Shutdown control is independent for each
channel, allowing for fl exibility in power management. The
device is capable of operating over an input voltage from

1.8V to 20V, and can supply 100mA of output current from
each channel with a dropout voltage of 300mV. Quiescent
current is well controlled in dropout.

The LT3023 regulator is stable with output capacitors as
low as 1μF. 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 LT3023
regulator is available in the thermally enhanced 10-lead
MSOP and DFN packages.

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.

over a 10Hz to 100kHz

RMS

TYPICAL APPLICATION

3.3V/2.5V Low Noise Regulators

V

3.7V TO
20V

IN

1μF

IN

SHDN1
SHDN2

OUT1

BYP1

ADJ1

LT3023

OUT2

BYP2

ADJ2

GND

0.01μF

0.01μF

422k

249k

261k

249k

3.3V AT100mA
NOISE

20μV

RMS

10μF

2.5V AT100mA
NOISE

20μV

RMS

10μF

3023 TA01

V

OUT

100μV/DIV

10Hz to 100kHz Output Noise

3023 TA01b

20μV

RMS

3023fa

1

LT3023

(

ABSOLUTE MAXIMUM RATINGS

(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

PIN CONFIGURATION

TOP VIEW

10

9
8
7
6

OUT2

SHDN2

IN

SHDN1

OUT1

BYP2

1

ADJ2

2

11

3

GND

4

ADJ1

5

BYP1

10-LEAD

T

JMAX

EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB

DD PACKAGE

3mm s 3mm) PLASTIC DFN

= 125°C, θJA = 40°C/W, θJC = 10°C/W

ORDER INFORMATION

Output Short-Circut Duration ........................... Indefi nite

Operating Junction Temperature Range

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

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

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

(MSE package only)

TOP VIEW

10

1

BYP2

2

ADJ2

GND
ADJ1
BYP1

10-LEAD PLASTIC MSOP

T

= 150°C, θJA = 40°C/W, θJC = 10°C/W

JMAX

EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB

3
4
5

MSE PACKAGE

11

9
8
7
6

OUT2

SHDN2

IN

SHDN1

OUT1

LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE

LT3023EDD#PBF LT3023EDD#TRPBF LAJA
LT3023IDD#PBF LT3023IDD#TRPBF LAJA

10-Lead (3mm × 3mm) Plastic DFN
10-Lead (3mm × 3mm) Plastic DFN

–40°C to 125°C

–40°C to 125°C
LT3023EMSE#PBF LT3023EMSE#TRPBF LTAHZ 10-Lead Plastic MSOP –40°C to 125°C
LT3023IMSE#PBF LT3023IMSE#TRPBF LTAHZ 10-Lead Plastic MSOP –40°C to 125°C

LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE

LT3023EDD LT3023EDD#TR LAJA
LT3023IDD LT3023IDD#TR LAJA

10-Lead (3mm × 3mm) Plastic DFN
10-Lead (3mm × 3mm) Plastic DFN

–40°C to 125°C

–40°C to 125°C
LT3023EMSE LT3023EMSE#TR LTAHZ 10-Lead Plastic MSOP –40°C to 125°C
LT3023IMSE LT3023IMSE#TR LTAHZ 10-Lead Plastic MSOP –40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed 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 specifi cations, go to: http://www.linear.com/tapeandreel/

ELECTRICAL CHARACTERISTICS

The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at TA = 25°C. (Note 2)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Minimum Input Voltage
(Notes 3, 11)

ADJ1, ADJ2 Pin Voltage
(Note 3, 4)

I

= 100mA

LOAD

V

= 2V, I

IN

2.3V < V

= 1mA

LOAD

< 20V, 1mA < I

IN

LOAD

< 100mA

l

1.205

l

1.190

1.8 2.3 V

1.220

1.220

1.235

1.250

3023fa

V
V

2

LT3023

ELECTRICAL CHARACTERISTICS

The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T

PARAMETER CONDITIONS MIN TYP MAX UNITS

Line Regulation (Note 3) ΔV
Load Regulation (Note 3) V

Dropout Voltage
V

= V

IN

OUT(NOMINAL)

(Notes 5, 6, 11)

GND Pin Current (Per Channel)
V

= V

IN

OUT(NOMINAL)

(Notes 5, 7)

Output Voltage Noise C
ADJ1/ADJ2 Pin Bias Current (Notes 3, 8) 30 100 nA
Shutdown Threshold V

SHDN1/SHDN2 Pin Current
(Note 9)

Quiescent Current in Shutdown V
Ripple Rejection (Note 3) V

Current Limit V

Input Reverse Leakage Current V
Reverse Output Current (Notes 3,10) V

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 LT3023 is tested and specifi ed under pulse load conditions
such that T

≅ TA. The LT3023E is 100% tested at TA = 25°C. Performance

J

at –40°C and 125°C is assured by design, characterization and correlation
with statistical process controls. The LT3023I is guaranteed over the full
–40°C to 125°C operating junction temperature range.

Note 3: The LT3023 is tested and specifi ed for these conditions with the
ADJ1/ADJ2 pin connected to the corresponding OUT1/OUT2 pin.

Note 4: Operating conditions are limited by maximum junction
temperature. The regulated output voltage specifi cation 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 LT3023 is
tested and specifi ed 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.

= 2V to 20V, I

IN

= 2.3V, ΔI

IN

V

= 2.3V, ΔI

IN

I

LOAD

I

LOAD

I

LOAD

I

LOAD

I

LOAD

I

LOAD

I

LOAD

I

LOAD

I

LOAD

I

LOAD

I

LOAD

I

LOAD

I

LOAD

OUT

OUT

V

OUT

V

SHDN

V

SHDN

= 6V, V

IN

= 2.72V (Avg), V

IN

I

LOAD

= 7V, V

IN

V

= 2.3V, ΔV

IN

= –20V, V

IN

OUT

LOAD
LOAD

= 1mA
= 1mA

= 10mA
= 10mA

= 50mA
= 50mA

= 100mA
= 100mA

= 0mA
= 1mA
= 10mA
= 50mA
= 100mA

= 10μF, C

= Off to On
= On to Off

= 0V
= 20V

SHDN

= 50mA

OUT

OUT

= 1.22V, VIN < 1.22V 5 10 μA

= 25°C. (Note 2)

A

= 1mA

LOAD

= 1mA to 100mA
= 1mA to 100mA

l

110 mV
11225mV

l

0.10 0.15

l

0.19

0.17 0.22

l

0.29

0.24 0.28

l

0.38

0.30 0.35

= 0.01μF, I

BYP

l

l
l
l
l
l

= 100mA, BW = 10Hz to 100kHz 20 μV

LOAD

l
l

0.25

l
l

20
55

230

1

2.2

0.8

0.65
0

1

0.45
45

100
400

2
4

1.4 V

0.5
3

= 0V (Both SHDN Pins) 0.01 0.1 μA

= 0V

OUT

RIPPLE

= –5%

= 0V

= 0.5V

P-P

, f

RIPPLE

= 120Hz,

55 65 dB

200 mA

l

110

l

1mA

Note 6: Dropout voltage is the minimum input to output voltage differential
needed to maintain regulation at a specifi ed output current. In dropout, the
output voltage will be equal to: V

Note 7: GND pin current is tested with V

IN

– V

.

DROPOUT

= 2.44V and a current source

IN

load. This means the device is tested while operating in its dropout region
or at the minimum input voltage specifi cation. This is the worst-case GND
pin current. The GND pin current will decrease slightly at higher input
voltages.

Note 8: ADJ1 and ADJ2 pin bias current fl ows into the pin.
Note 9: SHDN1 and SHDN2 pin current fl ows 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 fl ows into the OUT
pin and out the GND pin.

Note 11: For the LT3023 dropout voltage will be limited by the minimum
input voltage specifi cation under some output voltage/load conditions.
See the curve of Minimum Input Voltage in the Typical Performance
Characteristics.

mV

μA
μA

μA
mA
mA

RMS

μA

μA

mA

V
V

V
V

V
V

V
V

V

3023fa

3

LT3023

TYPICAL PERFORMANCE CHARACTERISTICS

Typical Dropout Voltage Guaranteed Dropout Voltage Dropout Voltage

500

450

400

350

300

250

200

150

DROPOUT VOLTAGE (mV)

100

50

0

0 102030

TJ = 125°C

TJ = 25°C

40

60 70 80 90 100

50

OUTPUT CURRENT (mA)

3023 G01

500

= TEST POINTS

450

400

350

300

250

200

150

DROPOUT VOLTAGE (mV)

100

50

0

0 102030

OUTPUT CURRENT (mA)

TJ ≤ 125°C

TJ ≤ 25°C

40

60 70 80 90 100

50

3023 G02

Quiescent Current ADJ1 or ADJ2 Pin Voltage Quiescent Current

40

VIN = 6V

= 250k

R

35

L

= 5μA

I

L

30

25

20

15

10

QUIESCENT CURRENT (μA)

5

0

–50

V

= V

SHDN

V

050

–25 25 75 125

TEMPERATURE (°C)

SHDN

IN

= 0V

100

3023 G03

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

3023 G05

500

450

400

350

300

250

200

150

DROPOUT VOLTAGE (mV)

100

50

0

–50

30

TJ = 25°C
R

25

I

20

15

10

QUIESCENT CURRENT (μA)

5

0

02 6 10 14 18

IL = 100mA

25

0

–25

TEMPERATURE (°C)

= 250k

L

= 5μA

L

V

SHDN

V

SHDN

4 8 12 16

INPUT VOLTAGE (V)

IL = 50mA

IL = 10mA

IL = 1mA

50

= V

= 0V

100

125

3023 G03

20

3023 G06

75

IN

GND Pin Current GND Pin Current vs I

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

= 100mA*

I

L

RL = 1.22k
I

INPUT VOLTAGE (V)

= 1mA*

L

4

TJ = 25°C
*FOR V

RL = 24.4Ω
I

L

5

= 1.22V

OUT

= 50mA*

RL = 122Ω

= 10mA*

I

L

678910

3023 G07

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

0 102030

4

LOAD

OUT(NOMINAL)

OUTPUT CURRENT (mA)

+ 1V

40

60 70 80 90 100

50

3023 G08

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

3023 G09

3023fa

75

TYPICAL PERFORMANCE CHARACTERISTICS

LT3023

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

1.0

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

IL = 100mA

IL = 1mA

50

25

0

TEMPERATURE (°C)

100

125

3023 G10

75

SHDN1 or SHDN2 Pin Input
Current

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

SHDN PIN INPUT CURRENT (μA)

0.1

0

0123

4

SHDN PIN VOLTAGE (V)

678910

5

3023 G11

SHDN1 or SHDN2 Pin Input
Current

1.4

1.2

1.0

0.8

0.6

0.4

SHDN PIN INPUT CURRENT (μA)

0.2

0

–50

ADJ1 or ADJ2 Pin Bias Current Current Limit Current Limit

100

90

80

70

60

50

40

30

ADJ PIN BIAS CURRENT (nA)

20

10

0

–50

–25

25

0

TEMPERATURE (°C)

50

75

100

125

3023 G13

350

V

= 0V

OUT

= 25°C

T

J

300

250

200

150

100

SHORT-CIRCUIT CURRENT (mA)

50

0

0

1

3

2

INPUT VOLTAGE (V)

350

300

250

200

150

CURRENT LIMIT (mA)

100

50

4

5

6

7

3023 G14

0

–50

0

–25

TEMPERATURE (°C)

0

–25

TEMPERATURE (°C)

V

= 20V

SHDN

50

25

25

75

50

75

100

VIN = 7V

= 0V

V

OUT

100

125

3023 G12

125

3023 G15

Reverse Output Current Reverse Output Current Input Ripple Rejection

100

TA = 25°C

90

= 0V

V

IN

= V

V

OUT

80

70

60

50

40

30

20

REVERSE OUTPUT CURRENT (μA)

10

0

ADJ

CURRENT FLOWS
INTO OUTPUT PIN

0123

OUTPUT VOLTAGE (V)

4

5

678910

3023 G16

18

VIN = 0V

= V

ADJ

–25 0

= 1.22V

25 75

TEMPERATURE (°C)

V

OUT

15

12

9

6

3

REVERSE OUTPUT CURRENT (μA)

0

–50

50 100 125

3023 G17

80

70

60

50

40

30

RIPPLE REJECTION (dB)

20

IL = 100mA

10

= 2.3V + 50mV

V

IN

= 0

C

BYP

0

0.1 100

0.01 1 10 1000

RIPPLE

RMS

FREQUENCY (kHz)

C

= 10μF

OUT

C

= 1μF

OUT

3023 G18

3023fa

5