LINEAR TECHNOLOGY LT3020, LT3020-1.2, LT3020-1.5, LT3020-1.8 Technical data

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FEATURES

■

VIN Range: 0.9V to 10V

■

Minimum Input Voltage: 0.9V

■

Dropout Voltage: 150mV Typical

■

Output Current: 100mA

■

Adjustable Output (V

■

Fixed Output Voltages: 1.2V, 1.5V, 1.8V

■

Stable with Low ESR, Ceramic Output Capacitors

REF

= V

OUT(MIN)

= 200mV)

(2.2µF Minimum)

■

0.2% Load Regulation from 1mA to 100mA

■

Quiescent Current: 120µA (Typ)

■

3µA Typical Quiescent Current in Shutdown

■

Current Limit Protection

■

Reverse-Battery Protection

■

No Reverse Current

■

Thermal Limiting with Hysteresis

■

8-Lead DFN (3mm × 3mm) and MSOP Packages

U

APPLICATIO S

■

Low Current Regulators

■

Battery-Powered Systems

■

Cellular Phones

■

Pagers

■

Wireless Modems

LT3020/LT3020-1.2/

LT3020-1.5/LT3020-1.8

100mA, Low Voltage,

Very Low Dropout

Linear Regulator

U

DESCRIPTIO

The LT®3020 is a very low dropout voltage (VLDOTM) linear
regulator that operates from input supplies down to 0.9V.
This device supplies 100mA of output current with a
typical dropout voltage of 150mV. The LT3020 is ideal for
low input voltage to low output voltage applications,
providing comparable electrical efficiency to that of a
switching regulator.

The LT3020 regulator optimizes stability and transient
response with low ESR, ceramic output capacitors as
small as 2.2µF. Other LT3020 features include 0% typical
line regulation and 0.2% typical load regulation. In shut­down, quiescent current drops to 3µA.

Internal protection circuitry includes reverse-battery pro­tection, current limiting, thermal limiting with hysteresis,
and reverse-current protection. The LT3020 is available as
an adjustable output device with an output range down to
the 200mV reference. Three fixed output voltages, 1.2V,

1.5V and 1.8V, are also available.

The LT3020 regulator is available in the low profile
(0.75mm) 8-lead (3mm × 3mm) DFN package with Ex­posed Pad and the 8-lead MSOP package.

, LTC and LT are registered trademarks of Linear Technology Corporation.
VLDO is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.

TYPICAL APPLICATIO

1.8V to 1.5V, 100mA VLDO Regulator

V

1.8V

IN

2.2µF

IN

LT3020-1.5

SHDN

OUT

GND

U

3020 TA01

2.2µF

V

OUT

1.5V
100mA

Minimum Input Voltage

1.1
IL = 100mA

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

MINIMUM INPUT VOLTAGE (V)

0.2

0.1

0

–50

250–25 50 75

TEMPERATURE (°C)

125100

3020 TA02

3020fc

1

LT3020/LT3020-1.2/

TOP VIEW

9

DD PACKAGE

8-LEAD (3mm × 3mm) PLASTIC DFN

5

6

7

8

4

3

2

1OUT

OUT

ADJ

GND

IN

IN

NC

SHDN

TOP VIEW

9

DD PACKAGE

8-LEAD (3mm × 3mm) PLASTIC DFN

5

6

7

8

4

3

2

1OUT

OUT

OUT

GND

IN

IN

NC

SHDN

LT3020-1.5/LT3020-1.8

WWWU

ABSOLUTE AXI U RATI GS

(Note 1)

IN Pin Voltage ........................................................ ± 10V

OUT Pin Voltage .................................................... ±10V

Input-to-Output Differential Voltage....................... ± 10V

ADJ Pin Voltage .................................................... ±10V

SHDN Pin Voltage ................................................. ± 10V

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

UU

W

PACKAGE/ORDER I FOR ATIO

ORDER PART NUMBER

LT3020EDD
LT3020IDD

DD PART MARKING

LAEX

T

= 125°C, θJA = 35°C/ W*, θJC = 3°C/ W

JMAX

EXPOSED PAD IS GND (PIN 9) CONNECT TO PIN 4
*SEE THE APPLICATIONS INFORMATION SECTION

LBYH

Operating Junction Temperature Range

(Notes 2, 3) .......................................... –40°C to 125°C

Storage Temperature Range

DD .................................................... – 65°C to 125°C

MS8.................................................. – 65°C to 150°C

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

ORDER PART NUMBER

LT3020EDD-1.2
LT3020EDD-1.5
LT3020EDD-1.8
LT3020IDD-1.2
LT3020IDD-1.5
LT3020IDD-1.8

DD PART MARKING

T

= 125°C, θJA = 35°C/ W*, θJC = 3°C/ W

JMAX

EXPOSED PAD IS GND (PIN 9) CONNECT TO PIN 4
*SEE THE APPLICATIONS INFORMATION SECTION

LBKC
LBKD
LBKF
LBYJ
LBYK
LBYM

ORDER PART NUMBER ORDER PART NUMBER

LT3020EMS8
LT3020IMS8

TOP VIEW

IN

OUT

1

OUT

2

ADJ

3

GND

4

MS8 PACKAGE

8-LEAD PLASTIC MSOP

T

= 150°C, θJA = 125°C/ W, θJC = 40°C/ W

JMAX

SEE THE APPLICATIONS INFORMATION SECTION

8
7
6
5

IN
NC
SHDN

MS8 PART MARKING

LTAGL
LTBYN

Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF

Lead Free Part Marking: http://www.linear.com/leadfree/

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

TOP VIEW

IN

OUT

1

OUT

2

OUT

3

GND

4

MS8 PACKAGE

8-LEAD PLASTIC MSOP

T

= 150°C, θJA = 125°C/ W, θJC = 40°C/ W

JMAX

SEE THE APPLICATIONS INFORMATION SECTION

8
7
6
5

IN
NC
SHDN

LT3020EMS8-1.2
LT3020EMS8-1.5
LT3020EMS8-1.8
LT3020IMS8-1.2
LT3020IMS8-1.5
LT3020IMS8-1.8

MS8 PART MARKING

LTBKG
LTBKH
LTBKJ
LTBYP
LTBYQ
LTBYR

3020fc

2

LT3020/LT3020-1.2/

LT3020-1.5/LT3020-1.8

ELECTRICAL CHARACTERISTICS

The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TJ = 25°C.

PARAMETER CONDITIONS MIN TYP MAX UNITS

Minimum Input Voltage (Note 14) I

ADJ Pin Voltage (Notes 4, 5) V

Regulated Output Voltage LT3020-1.2 V
(Note 4) 1.5V < V

Line Regulation (Note 6) ∆V

Load Regulation (Note 6) V

Dropout Voltage (Notes 7, 12) I

GND Pin Current I

= V

V

IN

OUT(NOMINAL)

(Notes 8, 12) I

Output Voltage Noise C

ADJ Pin Bias Current V
Shutdown Threshold V

SHDN Pin Current (Note 10) V

Quiescent Current in Shutdown V
Ripple Rejection (Note 6) VIN – V

= 100mA, TJ > 0°C 0.9 1.05 V

LOAD

= 100mA, TJ < 0°C 0.9 1.10 V

I

LOAD

= 1.5V, I

IN

1.15V < V

LT3020-1.5 V

LT3020-1.8 V

= 1.15V to 10V, I

IN

LT3020-1.2 ∆V
LT3020-1.5 ∆V
LT3020-1.8 ∆V

= 1.15V, ∆I

IN

LT3020-1.2 V

LT3020-1.5 V

LT3020-1.8 V

= 10mA 85 115 mV

LOAD

I

= 10mA

LOAD

I

= 100mA 150 180 mV

LOAD

= 100mA

I

LOAD

= 0mA

LOAD

I

= 1mA 570 µA

LOAD

= 10mA 920 µA

LOAD

= 100mA

I

LOAD

= 2.2µF, I

OUT

= 0.2V,

ADJ

= Off to On

OUT

= On to Off

V

OUT

= 0V, V

SHDN

= 10V, V

V

SHDN

= 6V, V

IN

OUT

LT3020-1.2 VIN – V

= 100mA

I

LOAD

LT3020-1.5 VIN – V
I

= 100mA

LOAD

LT3020-1.8 VIN – V

= 100mA

I

LOAD

= 1mA 196 200 204 mV

LOAD

< 10V, 1mA < I

IN

= 1.5V, I

IN

= 1.8V, I

IN

1.8V < V

= 2.1V, I

IN

2.1V < V

LOAD
IN
IN
IN

= 1mA to 100mA –1 0.4 1 mV

LOAD

= 1.5V, ∆I

IN

= 1.8V, ∆I

IN

= 2.1V, ∆I

IN

= 100mA, BW = 10Hz to 100kHz, V

LOAD

= 1.2V (Notes 6, 9) 20 50 nA

RIPPLE

= 10V

IN

= 10V

IN

= 0V 3 9 µA

SHDN

= 1V, V

RIPPLE

= 1V, V

OUT

= 1V, V

OUT

= 1V, V

OUT

< 100mA

LOAD

= 1mA 1.176 1.200 1.224 V

LOAD

< 10V, 1mA < I

IN

= 1mA 1.470 1.500 1.530 V

LOAD

< 10V, 1mA < I

IN

= 1mA 1.764 1.800 1.836 V

LOAD

< 10V, 1mA < I

IN

= 1mA
= 1.5V to 10V, I
= 1.8V to 10V, I
= 2.1V to 10V, I

= 1mA to 100mA –6 1 6 mV

LOAD

= 1mA to 100mA –7.5 1.5 7.5 mV

LOAD

= 1mA to 100mA –9 2 9 mV

LOAD

= 0.5V

, f

P-P

RIPPLE

RIPPLE

RIPPLE

RIPPLE

= 0.5V

= 0.5V

= 0.5V

LOAD
LOAD
LOAD

= 120Hz, I

LOAD

LOAD

LOAD

= 1mA
= 1mA
= 1mA

, f

P-P

, f

P-P

, f

P-P

●

193 200 206 mV

< 100mA

< 100mA

< 100mA

= 1.2V 245 µV

OUT

= 100mA 64 dB

LOAD

= 120Hz, 60 dB

RIPPLE

= 120Hz, 58 dB

RIPPLE

= 120Hz, 56 dB

RIPPLE

●

1.157 1.200 1.236 V

●

1.447 1.500 1.545 V

●

1.737 1.800 1.854 V

●

–1.75 0 1.75 mV

●

–10.5 0 10.5 mV

●

–13 0 13 mV

●

–15.8 0 15.8 mV

●

●

●

●

●

●

0.25 0.61 V

●

●

120 250 µA

2.25 3.5 mA

0.61 0.9 V

3 9.5 µA

180 mV

285 mV

±1 µA

RMS

3020fc

3

LT3020/LT3020-1.2/
LT3020-1.5/LT3020-1.8

ELECTRICAL CHARACTERISTICS

The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TJ = 25°C.

PARAMETER CONDITIONS MIN TYP MAX UNITS

Current Limit (Note 12) V

Input Reverse Leakage Current V
Reverse Output Current V

(Notes 11, 13) LT3020-1.2 V

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

Note 2: The LT3020 regulators are tested and specified under pulse load
conditions such that T
T

= 25°C. Performance at –40°C and 125°C is assured by design,

A

≈ TA. The LT3020E is 100% production tested at

J

characterization and correlation with statistical process controls. The
LT3020I is guaranteed over the full –40°C to 125°C operating junction
temperature range.

Note 3: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.

Note 4: Maximum junction temperature limits operating conditions. The
regulated output voltage specification does not apply for all possible
combinations of input voltage and output current. Limit the output current
range if operating at maximum input voltage. Limit the input voltage range
if operating at maximum output current.

Note 5: Typically the LT3020 supplies 100mA output current with a 1V
input supply. The guaranteed minimum input voltage for 100mA output
current is 1.10V.

Note 6: The LT3020 is tested and specified for these conditions with an
external resistor divider (20k and 30.1k) setting V
resistor divider adds 10µA of output load current. The line regulation and
load regulation specifications refer to the change in the 0.2V reference
voltage, not the 0.5V output voltage. Specifications for fixed output voltage
devices are referred to the output voltage.

= 10V, V

IN

V

= V

IN

= –10V, V

IN

OUT

= 1.2V, V

= 0V 360 mA

OUT

OUT(NOMINAL)

OUT

= 0V 3 5 µA

IN

LT3020-1.5 V
LT3020-1.8 V

to 0.5V. The external

OUT

+ 0.5V, ∆V

OUT

= –5%

●

110 310 mA

= 0V 1 10 µA

OUT
OUT
OUT

= 1.2V, V
= 1.5V, V
= 1.8V, V

= 0V 10 15 µA

IN

= 0V 10 15 µA

IN

= 0V 10 15 µA

IN

Note 7: Dropout voltage is the minimum input to output voltage differential
needed to maintain regulation at a specified output current. In dropout the
output voltage equals: (V

IN

– V

Note 8: GND pin current is tested with V

DROPOUT

).

= V

IN

OUT(NOMINAL)

and a current
source load. The device is tested while operating in its dropout region.
This condition forces the worst-case GND pin current. GND pin current
decreases at higher input voltages.

Note 9: Adjust pin bias current flows out of the ADJ pin.
Note 10: Shutdown pin current flows into the SHDN pin.
Note 11: Reverse output current is tested with IN grounded and OUT

forced to the rated output voltage. This current flows into the OUT pin and
out of the GND pin. For fixed voltage devices this includes the current in
the output resistor divider.

Note 12: The LT3020 is tested and specified for these conditions with an
external resistor divider (20k and 100k) setting V

to 1.2V. The external

OUT

resistor divider adds 10µA of load current.
Note 13: Reverse current is higher for the case of (rated_output) < V

because the no-load recovery circuitry is active in this region and is

V

IN,

OUT

trying to restore the output voltage to its nominal value.
Note 14: Minimum input voltage is the minimum voltage required by the

control circuit to regulate the output voltage and supply the full 100mA
rated current. This specification is tested at V

= 0.5V. At higher output

OUT

voltages the minimum input voltage required for regulation will be equal to
the regulated output voltage V

plus the dropout voltage.

OUT

<

4

3020fc

LT3020/LT3020-1.2/

INPUT VOLTAGE (V)

0

GND PIN CURRENT (µA)

2500

2250

2000

1500

1750

1250

1000

750

500

250

0

8

3020 G06

213579

4

6

10

V

OUT

= 1.2V

T

J

= 25°C

RL = 12Ω
I

L

= 100mA

RL = 24Ω
I

L

= 50mA

RL = 120Ω
I

L

= 10mA

RL = 1.2k, IL = 1mA

TEMPERATURE (°C)

–50

QUIESCENT CURRENT (µA)

250

225

200

150

175

125

100

75

50

25

0

3020 G03

250–25 50 75

125100

V

SHDN

= V

IN

V

SHDN

= 0V

VIN = 6V
V

OUT

= 1.2V

I

L

= 0

LT3020-1.5/LT3020-1.8

UW

TYPICAL PERFOR A CE CHARACTERISTICS

Typical Dropout Voltage Dropout Voltage Quiescent Current

250

225

200

175

150

125

100

75

DROPOUT VOLTAGE (mV)

50

25

0

0

TJ = 125°C

2010 30 50 70 90

OUTPUT CURRENT (mA)

TJ = 25°C

40

60

80

100

3020 G01

250

V

= 1.2V

OUT

225

200

175

150

125

100

75

DROPOUT VOLTAGE (mV)

50

25

0

–50

TEMPERATURE (°C)

250–25 50 75

IL = 100mA

IL = 50mA

IL = 10mA

IL = 1mA

125100

3020 G02

ADJ Pin Voltage

206

IL = 1mA

204

202

200

198

ADJ PIN VOLTAGE (mV)

196

194

–50

250–25 50 75

TEMPERATURE (°C)

Output Voltage

1.230
IL = 1mA

1.220

1.210

1.200

1.190

OUTPUT VOLTAGE (V)

1.180

1.170

–50

–25 0

50 100 125

25 75

TEMPERATURE (°C)

3020 G04

3020 G24

125100

Output Voltage Output Voltage

1.830
IL = 1mA

1.820

1.810

1.800

1.790

OUTPUT VOLTAGE (V)

1.780

1.770

–50

–25 0

Quiescent Current

1000

V

= 1.2V

OUT

= 0

I

900

L

= 25°C

T

J

800

700

600

500

400

300

QUIESCENT CURRENT (µA)

200

100

0

213579

0

50 100 125

25 75

TEMPERATURE (°C)

V

= V

SHDN

IN

V

= 0V

SHDN

6

4

INPUT VOLTAGE (V)

3020 G22

8

3020 G05

OUTPUT VOLTAGE (V)

10

1.530
IL = 1mA

1.520

1.510

1.500

1.490

1.480

1.470

–50

GND Pin Current

–25 0

50 100 125

25 75

TEMPERATURE (°C)

3020 G23

3020fc

5