LT3010/LT3010-5
50mA, 3V to 80V
Low Dropout
Micropower Linear Regulator
FEATURES
s
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DESCRIPTIO
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Wide Input Voltage Range: 3V to 80V
Low Quiescent Current: 30µA
Low Dropout Voltage: 300mV
Output Current: 50mA
Thermally Enhanced 8-Lead MSOP Package
No Protection Diodes Needed
Fixed Output Voltage: 5V (LT3010-5)
Adjustable Output from 1.275V to 60V (LT3010)
1µA Quiescent Current in Shutdown
Stable with 1µF Output Capacitor
Stable with Aluminum, Tantalum or Ceramic
Capacitors
Reverse-Battery Protection
No Reverse Current Flow from Output
Thermal Limiting
The LT
®
3010 is a high voltage, micropower low dropout
linear regulator. The device is capable of supplying 50mA
output current with a dropout voltage of 300mV. Designed
for use in battery-powered or high voltage systems, the
low quiescent current (30µA operating and 1µA in shut-
down) makes the LT3010 an ideal choice. Quiescent
current is also well controlled in dropout.
Other features of the LT3010 include the ability to operate
with very small output capacitors. The regulators are
stable with only 1µF on the output while most older
devices require between 10µF and 100µF for stability.
Small ceramic capacitors can be used without the neces-
sary addition of ESR as is common with other regulators.
Internal protection circuitry includes reverse-battery pro-
tection, current limiting, thermal limiting and reverse
current protection.
The device is available in a fixed output voltage of 5V and
as an adjustable device with a 1.275V reference voltage.
The LT3010 regulator is available in the 8-lead MSOP
package with an exposed pad for enhanced thermal han-
dling capability.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
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Low Current High Voltage Regulators
Regulator for Battery-Powered Systems
Telecom Applications
Automotive Applications
TYPICAL APPLICATIO
350
5V Supply with Shutdown
IN
V
IN
5.4V TO
80V
1µF
SHDN SENSE
GND
3010 TA01
300
OUT
LT3010-5
V
OUT
5V
50mA
1µF
DROPOUT VOLTAGE (mV)
250
200
150
100
50
0
0
10
20
30
40
50
3010 TA02
V
SHDN
(PIN 5) OUTPUT
<0.3V
OFF
>2.0V
ON
NC
ON
U
Dropout Voltage
OUTPUT CURRENT (mA)
3010f
U
U
1
LT3010/LT3010-5
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
OUT
SENSE/ADJ*
NC
GND
1
2
3
4
8
7
6
5
IN
NC
NC
SHDN
IN Pin Voltage ...................................................
±80V
OUT Pin Voltage ...............................................
±60V
IN to OUT Differential Voltage ...........................
±80V
ADJ Pin Voltage ..................................................
±7V
SHDN Pin Input Voltage ...................................
±80V
Output Short-Circuit Duration ..................... Indefinite
Storage Temperature Range ............ –65°C to 150°C
Operating Junction Temperature Range
(Notes 3, 10, 11) ......................... –40°C to 125°C
Lead Temperature (Soldering, 10 sec)............ 300°C
ORDER PART
NUMBER
LT3010EMS8E
LT3010EMS8E-5
MS8 PART MARKING
LTZF
LTAEF
MS8E PACKAGE
8-LEAD PLASTIC MSOP
*SENSE FOR LT3010-5, ADJ FOR LT3010
T
JMAX
= 125°C,
θ
JA
= 40°C/ W,
θ
JC
= 16°C/ W
†
SEE APPLICATIONS INFORMATION SECTION.
EXPOSED PAD IS GND
(MUST BE SOLDERED TO PCB)
†
MEASURED AT BOTTOM PAD
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The
q
denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
J
= 25°C.
PARAMETER
Minimum Input Voltage
Regulated Output Voltage (Note 3)
ADJ Pin Voltage
(Notes 2,3)
Line Regulation
Load Regulation
CONDITIONS
LT3010
LT3010-5
LT3010
LT3010-5
LT3010 (Note 2)
LT3010-5
LT3010 (Note 2)
Dropout Voltage
V
IN
= V
OUT(NOMINAL)
(Notes 4, 5)
I
LOAD
= 1mA
I
LOAD
= 1mA
I
LOAD
= 10mA
I
LOAD
= 10mA
I
LOAD
= 50mA
I
LOAD
= 50mA
GND Pin Current
V
IN
= V
OUT(NOMINAL)
(Notes 4, 6)
Output Voltage Noise
ADJ Pin Bias Current
Shutdown Threshold
SHDN Pin Current
(Note 8)
Quiescent Current in Shutdown
I
LOAD
= 0mA
I
LOAD
= 1mA
I
LOAD
= 10mA
I
LOAD
= 50mA
C
OUT
= 10µF, I
LOAD
= 50mA, BW = 10Hz to 100kHz
(Note 7)
V
OUT
= Off to On
V
OUT
= On to Off
V
SHDN
= 0V
V
SHDN
= 6V
V
IN
= 6V, V
SHDN
= 0V
0.3
I
LOAD
= 50mA
V
IN
= 5.5V, I
LOAD
= 1mA
6V < V
IN
< 80V, 1mA < I
LOAD
< 50mA
V
IN
= 3V, I
LOAD
= 1mA
4V < V
IN
< 80V, 1mA < I
LOAD
< 50mA
∆V
IN
= 5.5V to 80V, I
LOAD
= 1mA
∆V
IN
= 3V to 80V, I
LOAD
= 1mA
V
IN
= 6V,
∆I
LOAD
= 1mA to 50mA
V
IN
= 6V,
∆I
LOAD
= 1mA to 50mA
V
IN
= 4V,
∆I
LOAD
= 1mA to 50mA
V
IN
= 4V,
∆I
LOAD
= 1mA to 50mA
q
MIN
4.925
q
4.850
1.258
q
1.237
q
q
q
TYP
3
5.000
5.000
1.275
1.275
3
3
25
10
MAX
4
5.075
5.150
1.292
1.313
15
13
50
90
20
32
150
190
260
350
370
550
60
180
700
3.3
100
2
2
0.5
5
UNITS
V
V
V
V
V
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
µA
µA
µA
mA
µV
RMS
nA
V
V
µA
µA
µA
q
100
q
200
q
300
q
q
q
q
q
30
100
400
1.8
100
50
1.3
0.8
0.5
0.1
1
2
U
3010f
W
U
U
W W
W
LT3010/LT3010-5
ELECTRICAL CHARACTERISTICS
The
q
denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
J
= 25°C.
PARAMETER
Ripple Rejection
Current Limit
CONDITIONS
LT3010
LT3010-5
V
IN
= 7V(Avg), V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz, I
LOAD
= 50mA
V
IN
= 7V(Avg), V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz, I
LOAD
= 50mA
q
q
q
10
8
MIN TYP
65
60
60
60
6
20
15
MAX
75
68
140
UNITS
dB
dB
mA
mA
mA
mA
µA
µA
V
IN
= 7V, V
OUT
= 0V
LT3010-5
V
IN
= 6V,
∆V
OUT
= –0.1V
LT3010 (Note 2) V
IN
= 4V,
∆V
OUT
= –0.1V
V
IN
= –80V, V
OUT
= 0V
LT3010-5
V
OUT
= 5V, V
IN
< 5V
LT3010 (Note 2) V
OUT
= 1.275V, V
IN
< 1.275V
Input Reverse
Leakage Current
Reverse Output Current
(Note 9)
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LT3010 (adjustable version) is tested and specified for these
conditions with the ADJ pin connected to the OUT pin.
Note 3:
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 4:
To satisfy requirements for minimum input voltage, the LT3010
(adjustable version) is tested and specified for these conditions with an
external resistor divider (249k bottom, 392k top) for an output voltage of
3.3V. The external resistor divider will add a 5µA 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 will be equal to (V
IN
– V
DROPOUT
).
Note 6:
GND pin current is tested with V
IN
= V
OUT
(nominal) and a current
source load. This means the device is tested while operating in its dropout
region. This is the worst-case GND pin current. The GND pin current will
decrease slightly at higher input voltages.
Note 7:
ADJ pin bias current flows into the ADJ pin.
Note 8:
SHDN pin current flows out of the SHDN pin.
Note 9:
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 10:
The LT3010E is guaranteed to meet performance specifications
from 0°C to 125°C operating junction temperature. Specifications over
the –40°C to 125°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
Note 11:
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.
TYPICAL PERFOR A CE CHARACTERISTICS
Typical Dropout Voltage
500
450
DROPOUT VOLTAGE (mV)
DROPOUT VOLTAGE (mV)
600
500
DROPOUT VOLTAGE (mV)
400
350
300
250
200
150
100
50
0
T
J
= 25°C
T
J
= 125°C
0
5
10 15 20 25 30 35 40 45 50
OUTPUT CURRENT (mA)
3010 G01
U W
Guaranteed Dropout Voltage
= TEST POINTS
Dropout Voltage
500
450
400
350
300
250
200
150
100
50
I
L
= 1mA
I
L
= 10mA
I
L
= 50mA
400
300
T
J
≤
125°C
T
J
≤
25°C
200
100
0
0
5
10 15 20 25 30 35 40 45 50
OUTPUT CURRENT (mA)
3010 G02
0
–50 –25
50
25
0
75
TEMPERATURE (°C)
100
125
3010 G03
3010f
3
LT3010/LT3010-5
TYPICAL PERFOR A CE CHARACTERISTICS
Quiescent Current
40
35
QUIESCENT CURRENT (µA)
ADJ PIN VOLTAGE (V)
25
20
15
10
5
0
– 50 – 25
0
V
SHDN
= 0V
75
50
25
TEMPERATURE (°C)
100
125
V
IN
> 6V
R
L
=
∞,
I
L
= 0 (LT3010-5)
R
L
= 250k, I
L
= 5µA (LT3010)
1.280
1.275
1.270
1.265
1.260
1.255
– 50 – 25
0
75
50
25
TEMPERATURE (°C)
100
125
OUTPUT VOLTAGE (V)
30
V
SHDN
= V
IN
LT3010 Quiescent Current
50
45
T
J
= 25°C
R
L
=
∞
V
SHDN
= V
IN
200
QUIESCENT CURRENT (µA)
QUIESCENT CURRENT (µA)
40
35
30
25
20
15
10
5
0
0
1
2
GND PIN CURRENT (mA)
V
SHDN
= 0V
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
LT3010-5 GND Pin Current
2.0
T
J
= 25°C
1.8 *FOR V
OUT
= 5V
1.6
2.0
GND PIN CURRENT (mA)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
1
2
GND PIN CURRENT (mA)
R
L
= 100Ω
I
L
= 50mA*
R
L
= 200Ω
I
L
= 25mA*
R
L
= 500Ω
I
L
= 10mA*
R
L
= 5k, I
L
= 1mA*
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
SHDN PIN THRESHOLD (V)
4
U W
3010 G04
3010 G08
3010 G09
LT3010 ADJ Pin Voltage
1.295
1.290
1.285
I
L
= 1mA
5.08
5.06
5.04
5.02
5.00
4.98
4.96
4.94
LT3010-5 Output Voltage
I
L
= 1mA
4.92
– 50 – 25
0
75
50
25
TEMPERATURE (°C)
100
125
3010 G06
3010 G05
LT3010-5 Quiescent Current
T
J
= 25°C
180 R
L
=
∞
160
140
120
100
80
60
40
20
0
0
1
2
V
SHDN
= V
IN
V
SHDN
= 0V
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
LT3010 GND Pin Current
T
J
= 25°C
*FOR V
OUT
= 1.275V
R
L
= 25.5Ω
I
L
= 50mA*
R
L
= 51Ω
I
L
= 25mA*
R
L
= 127Ω
I
L
= 10mA*
R
L
= 1.27k I
L
= 1mA*
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
3010 G07
3010 G10
GND Pin Current vs I
LOAD
V
IN
= V
OUT(NOMINAL)
+ 1V
1.8 T
J
= 25°C
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
5
10 15 20 25 30 35 40 45 50
OUTPUT CURRENT (mA)
3010 G11
SHDN Pin Threshold
1.6
1.4
OFF-TO-ON
1.2
1.0
0.8
0.6
0.4
0.2
0
– 50 – 25
0
75
50
25
TEMPERATURE (°C)
100
125
ON-TO-OFF
3010 G12
3010f
LT3010/LT3010-5
TYPICAL PERFOR A CE CHARACTERISTICS
SHDN Pin Current
0.6
T
J
= 25°C
CURRENT FLOWS
0.5 OUT OF SHDN PIN
0.8
0.6
0.5
0.4
0.3
0.2
0.1
ADJ PIN BIAS CURRENT (nA)
SHDN PIN CURRENT (µA)
SHDN PIN CURRENT (µA)
0.4
0.3
0.2
0.1
0
0 0.5 1
1.5 2 2.5 3 3.5 4
SHDN PIN VOLTAGE (V)
4.5
5
Current Limit
200
160
160
CURRENT LIMIT (mA)
REVERSE OUTPUT CURRENT (µA)
V
OUT
= 0V
180 T
J
= 25°C
CURRENT LIMIT (mA)
140
120
100
80
60
40
20
0
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
Reverse Output Current
24
REVERSE OUTPUT CURRENT (µA)
21
18
15
12
V
IN
= 0V
V
OUT
= V
ADJ
= 1.275V (LT3010)
V
OUT
= V
SENSE
= 5V (LT3010-5)
RIPPLE REJECTION (dB)
RIPPLE REJECTION (dB)
LT3010-5
9
6
3
0
– 50 – 25
0
75
50
25
TEMPERATURE (°C)
100
125
LT3010
U W
3010 G13
3010 G16
3010 G19
SHDN Pin Current
V
SHDN
= 0V
CURRENT FLOWS
0.7
OUT OF SHDN PIN
80
70
60
50
40
30
20
10
0
75
50
25
TEMPERATURE (°C)
100
125
ADJ Pin Bias Current
0
– 50 – 25
0
– 50 – 25
0
75
50
25
TEMPERATURE (°C)
100
125
3010 G14
3010 G15
Current Limit
200
180
V
IN
= 7V
V
OUT
= 0V
100
90
80
70
60
50
40
Reverse Output Current
T
J
= 25°C
V
IN
= 0V
CURRENT FLOWS
INTO OUTPUT PIN
V
OUT
= V
ADJ
(LT3010)
V
OUT
= V
SENSE
(LT3010-5)
140
120
100
80
60
40
20
0
–50 –25
50
25
0
75
TEMPERATURE (°C)
100
125
ADJ
PIN CLAMP
(SEE APPLICATIONS
INFORMATION)
LT3010
30
20
10
0
0
1
2
3 4 5 6 7 8
OUTPUT VOLTAGE (V)
9
10
LT3010-5
3010 G17
3010 G18
Input Ripple Rejection
80
78
76
74
72
70
68
66
64
62
V
IN
= 7V + 0.5V
P-P
RIPPLE AT f = 120Hz
I
L
= 50mA
V
OUT
= 1.275V
50
25
0
75
TEMPERATURE (°C)
100
125
100
90
80
70
60
50
40
30
20
10
0
Input Ripple Rejection
V
IN
= 7V + 50mV
RMS
RIPPLE
I
L
= 50mA
C
OUT
= 10µF
C
OUT
= 1µF
60
–50 –25
10
100
1k
10k
FREQUENCY (Hz)
100k
1M
3010 G21
3010 G20
3010f
5
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