LT3020/LT3020-1.2/
LT3020-1.5/LT3020-1.8
100mA, Low Voltage,
Very Low Dropout
Linear Regulator
FEATURES
■
■
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■
■
■
■
■
■
■
■
■
■
■
DESCRIPTIO
V
IN
Range: 0.9V to 10V
Minimum Input Voltage: 0.9V
Dropout Voltage: 150mV Typical
Output Current: 100mA
Adjustable Output (V
REF
= V
OUT(MIN)
= 200mV)
Fixed Output Voltages: 1.2V, 1.5V, 1.8V
Stable with Low ESR, Ceramic Output Capacitors
(2.2µF Minimum)
0.2% Load Regulation from 0mA 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
The LT
®
3020 is a very low dropout voltage (VLDO
TM
) 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% line
regulation and 0.2% typical load regulation. In shutdown,
quiescent current typically drops to 3µA.
Internal protection circuitry includes reverse-battery pro-
tection, 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 ex-
posed 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.
APPLICATIO S
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Low Current Regulators
Battery-Powered Systems
Cellular Phones
Pagers
Wireless Modems
TYPICAL APPLICATIO
V
IN
1.8V
2.2µF
IN
OUT
LT3020-1.5
SHDN
GND
Minimum Input Voltage
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–50
–25
0
25
50
75
TEMPERATURE (°C)
100
125
I
L
= 100mA
1.8V to 1.5V, 100mA VLDO Regulator
V
OUT
1.5V
100mA
MINIMUM INPUT VOLTAGE (V)
2.2µF
3020 TA01
U
3020 TA02
U
U
sn3020 3020fas
1
LT3020/LT3020-1.2/
LT3020-1.5/LT3020-1.8
ABSOLUTE
AXI U
RATI GS
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
PACKAGE/ORDER I FOR ATIO
TOP VIEW
OUT 1
OUT 2
ADJ 3
GND 4
9
8
7
6
5
IN
IN
NC
SHDN
ORDER PART
NUMBER
LT3020EDD
OUT 1
OUT 2
OUT 3
GND 4
DD PART MARKING
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
LAEX
T
JMAX
= 125°C,
θ
JA
= 35°C/ W*,
θ
JC
= 3°C/ W
EXPOSED PAD IS GND (PIN 9) CONNECT TO PIN 4
*SEE THE APPLICATIONS INFORMATION SECTION
ORDER PART
NUMBER
TOP VIEW
OUT
OUT
ADJ
GND
1
2
3
4
8
7
6
5
IN
IN
NC
SHDN
LT3020EMS8
MS8 PACKAGE
8-LEAD PLASTIC MSOP
MS8 PART MARKING
LTAGL
T
JMAX
= 150°C,
θ
JA
= 125°C/ W,
θ
JC
= 40°C/ W
SEE THE APPLICATIONS INFORMATION SECTION
Consult factory for parts specified with wider operating temperature ranges.
2
U
U
W
W W
U
W
(Note 1)
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
TOP VIEW
8
9
7
6
5
IN
IN
NC
SHDN
ORDER PART
NUMBER
LT3020EDD-1.2
LT3020EDD-1.5
LT3020EDD-1.8
DD8 PART MARKING
LBKC
LBKD
LBKF
ORDER PART
NUMBER
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 35°C/ W*,
θ
JC
= 3°C/ W
EXPOSED PAD IS GND (PIN 9) CONNECT TO PIN 4
*SEE THE APPLICATIONS INFORMATION SECTION
TOP VIEW
OUT
OUT
OUT
GND
1
2
3
4
8
7
6
5
IN
IN
NC
SHDN
LT3020EMS8-1.2
LT3020EMS8-1.5
LT3020EMS8-1.8
MS8 PART MARKING
LTBKG
LTBKH
LTBKJ
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 125°C/ W,
θ
JC
= 40°C/ W
SEE THE APPLICATIONS INFORMATION SECTION
sn3020 3020fas
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 T
J
= 25°C.
PARAMETER
CONDITIONS
MIN
TYP
0.9
0.9
●
●
●
●
●
●
●
●
●
●
●
●
●
MAX
1.05
1.10
204
206
1.224
1.236
1.530
1.545
1.836
1.854
1.75
10.5
13
15.8
1
1
6
6
7.5
7.5
9
9
115
180
180
285
250
UNITS
V
V
mV
mV
V
V
V
V
V
V
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
µA
µA
µA
mA
µV
RMS
nA
V
V
µA
µA
µA
dB
dB
dB
dB
Minimum Input Voltage (Note 14) I
LOAD
= 100mA, T
J
> 0°C
I
LOAD
= 100mA, T
J
< 0°C
ADJ Pin Voltage (Notes 4, 5)
Regulated Output Voltage
(Note 4)
V
IN
= 1.5V, I
LOAD
= 1mA
1.15V < V
IN
< 10V, 1mA < I
LOAD
< 100mA
LT3020-1.2
LT3020-1.5
LT3020-1.8
Line Regulation (Note 6)
V
IN
= 1.5V, I
LOAD
= 1mA
1.5V < V
IN
< 10V, 1mA < I
LOAD
< 100mA
V
IN
= 1.8V, I
LOAD
= 1mA
1.8V < V
IN
< 10V, 1mA < I
LOAD
< 100mA
V
IN
= 2.1V, I
LOAD
= 1mA
2.1V < V
IN
< 10V, 1mA < I
LOAD
< 100mA
196
193
1.176
1.157
1.470
1.447
1.764
1.737
–1.75
–10.5
–13
–15.8
–1
–2
–6
–12
–7.5
–15
–9
–18
200
200
1.200
1.200
1.500
1.500
1.800
1.800
0
0
0
0
0.4
1
1.5
2
85
150
∆V
IN
= 1.15V to 10V, I
LOAD
= 1mA
LT3020-1.2
∆V
IN
= 1.5V to 10V, I
LOAD
= 1mA
LT3020-1.5
∆V
IN
= 1.8V to 10V, I
LOAD
= 1mA
LT3020-1.8
∆V
IN
= 2.1V to 10V, I
LOAD
= 1mA
V
IN
= 1.15V,
∆I
LOAD
= 1mA to 100mA
V
IN
= 1.15V,
∆I
LOAD
= 1mA to 100mA
LT3020-1.2
LT3020-1.5
LT3020-1.8
V
IN
= 1.5V,
∆I
LOAD
= 1mA to 100mA
V
IN
= 1.5V,
∆I
LOAD
= 1mA to 100mA
V
IN
= 1.8V,
∆I
LOAD
= 1mA to 100mA
V
IN
= 1.8V,
∆I
LOAD
= 1mA to 100mA
V
IN
= 2.1V,
∆I
LOAD
= 1mA to 100mA
V
IN
= 2.1V,
∆I
LOAD
= 1mA to 100mA
Load Regulation (Note 6)
Dropout Voltage (Notes 7, 12)
I
LOAD
= 10mA
I
LOAD
= 10mA
I
LOAD
= 100mA
I
LOAD
= 100mA
●
●
GND Pin Current
V
IN
= V
OUT(NOMINAL)
(Notes 8, 12)
Output Voltage Noise
ADJ Pin Bias Current
Shutdown Threshold
SHDN Pin Current (Note 10)
Quiescent Current in Shutdown
Ripple Rejection (Note 6)
I
LOAD
= 0mA
I
LOAD
= 1mA
I
LOAD
= 10mA
I
LOAD
= 100mA
C
OUT
= 2.2µF, I
LOAD
= 100mA, BW = 10Hz to 100kHz, V
OUT
= 1.2V
V
ADJ
= 0.2V,
RIPPLE
= 1.2V (Notes 6, 9)
V
OUT
= Off to On
V
OUT
= On to Off
V
SHDN
= 0V, V
IN
= 10V
V
SHDN
= 10V, V
IN
= 10V
V
IN
= 6V, V
SHDN
= 0V
V
IN
– V
OUT
= 1V, V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz, I
LOAD
= 100mA
LT3020-1.2 V
IN
– V
OUT
= 1V, V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz,
I
LOAD
= 100mA
LT3020-1.5 V
IN
– V
OUT
= 1V, V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz,
I
LOAD
= 100mA
LT3020-1.8 V
IN
– V
OUT
= 1V, V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz,
I
LOAD
= 100mA
●
120
570
920
2.25
245
20
3.5
50
0.9
±0.3
9.5
9
●
●
●
●
0.25
0.61
0.61
3
3
64
60
58
56
sn3020 3020fas
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 T
J
= 25°C.
PARAMETER
Current Limit (Note 12)
Input Reverse Leakage Current
Reverse Output Current
(Notes 11, 13)
CONDITIONS
V
IN
= 10V, V
OUT
= 0V
V
IN
= V
OUT(NOMINAL)
+ 0.5V,
∆V
OUT
= –5%
V
IN
= –10V, V
OUT
= 0V
V
OUT
= 1.2V, V
IN
= 0V
LT3020-1.2
V
OUT
= 1.2V, V
IN
= 0V
LT3020-1.5
V
OUT
= 1.5V, V
IN
= 0V
LT3020-1.8
V
OUT
= 1.8V, V
IN
= 0V
MIN
●
110
TYP
360
310
1
3
10
10
10
MAX
UNITS
mA
mA
µA
µA
µA
µA
µA
10
5
15
15
15
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
J
≈
T
A
. The LT3020 is 100% production tested at
T
A
= 25°C. Performance at –40°C and 125°C is assured by design,
characterization and correlation with statistical process controls.
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
OUT
to 0.5V. The external
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.
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
DROPOUT
).
Note 8:
GND pin current is tested with V
IN
= V
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
OUT
to 1.2V. The external
resistor divider adds 10µA of load current.
Note 13:
Reverse current is higher for the case of (rated_output) < V
OUT
<
V
IN,
because the no-load recovery circuitry is active in this region and is
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
OUT
= 0.5V. At higher output
voltages the minimum input voltage required for regulation will be equal to
the regulated output voltage V
OUT
plus the dropout voltage.
TYPICAL PERFOR A CE CHARACTERISTICS
Typical Dropout Voltage
250
225
DROPOUT VOLTAGE (mV)
DROPOUT VOLTAGE (mV)
200
175
150
125
100
75
50
25
0
0
10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
3020 G01
175
150
125
100
75
50
25
0
–50
–25
0
25
50
75
TEMPERATURE (°C)
100
125
I
L
= 1mA
I
L
= 10mA
I
L
= 50mA
QUIESCENT CURRENT (µA)
T
J
= 125°C
T
J
= 25°C
4
U W
Dropout Voltage
250
225
200
V
OUT
= 1.2V
I
L
= 100mA
250
Quiescent Current
V
IN
= 6V
225 V
OUT
= 1.2V
I
L
= 0
200
175
150
125
100
75
50
25
0
–50
–25
V
SHDN
= 0V
0
25
50
75
TEMPERATURE (°C)
100
125
V
SHDN
= V
IN
3020 G02
3020 G03
sn3020 3020fas
LT3020/LT3020-1.2/
LT3020-1.5/LT3020-1.8
TYPICAL PERFOR A CE CHARACTERISTICS
ADJ Pin Voltage
206
204
ADJ PIN VOLTAGE (mV)
I
L
= 1mA
OUTPUT VOLTAGE (V)
202
200
198
196
194
–50
1.810
1.800
1.790
1.780
1.770
–50 –25
OUTPUT VOLTAGE (V)
–25
0
25
50
75
TEMPERATURE (°C)
Output Voltage
1.230
1.220
I
L
= 1mA
1000
QUIESCENT CURRENT (µA)
GND PIN CURRENT (µA)
OUTPUT VOLTAGE (V)
1.210
1.200
1.190
1.180
1.170
–50 –25
50
25
75
0
TEMPERATURE (°C)
Quiescent Current
1000
900
QUIESCENT CURRENT (µA)
V
OUT = 1.8V (LT 3020-1.8)
IL = 0
T
J
= 25°C
700
600
500
400
300
200
100
0
0
1
2
V
SHDN
= V
IN
V
SHDN
= 0V
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
1750
1500
1250
1000
750
500
250
0
0
1
2
QUIESCENT CURRENT (µA)
800
GND PIN CURRENT (µA)
U W
100
3020 G04
Output Voltage
1.830
1.820
I
L
= 1mA
1.530
1.520
1.510
1.500
1.490
1.480
Output Voltage
I
L
= 1mA
125
50
25
75
0
TEMPERATURE (°C)
100
125
1.470
–50 –25
50
25
75
0
TEMPERATURE (°C)
100
125
3020 G22
3020 G23
Quiescent Current
V
OUT
= 1.2V
900 I
L
= 0
T
J
= 25°C
800
700
600
500
400
300
200
100
100
125
0
0
1
2
V
SHDN
= V
IN
V
SHDN
= 0V
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
2500
2250
2000
1750
1500
1250
1000
750
500
250
0
GND Pin Current
V
OUT
= 1.2V
T
J
= 25°C
R
L
= 12Ω
I
L
= 100mA
R
L
= 24Ω
I
L
= 50mA
R
L
= 120Ω
I
L
= 10mA
R
L
= 1.2k, I
L
= 1mA
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
3020 G24
3020 G05
3020 G06
GND Pin Current
2500
2250
2000
R
L
= 18Ω
I
L
= 100mA
V
OUT = 1.8V (LT 3020-1.8)
T
J
= 25°C
1000
900
800
700
600
500
400
300
200
100
Quiescent Current
V
OUT = 1.5V (LT 3020-1.5)
IL = 0
T
J
= 25°C
R
L
= 36Ω
I
L
= 50mA
R
L
= 180Ω
I
L
= 10mA
R
L
= 1.8k
I
L
= 1mA
V
SHDN
= V
IN
V
SHDN
= 0V
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
0
3020 G25
3020 G26
3020 G27
sn3020 3020fas
5
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