FEATURES
■
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
U
APPLICATIO S
■
Low Current High Voltage Regulators
■
Regulator for Battery-Powered Systems
■
Telecom Applications
■
Automotive Applications
LT3010/LT3010-5
50mA, 3V to 80V
Low Dropout
Micropower Linear Regulator
U
DESCRIPTIO
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 necessary addition of ESR as is common with other regulators.
Internal protection circuitry includes reverse-battery protection, 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 handling capability.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
5V Supply with Shutdown
1µF
OFF
ON
ON
IN
LT3010-5
SHDN
SENSE
GND
V
SHDN
V
IN
5.4V TO
80V
(PIN 5)
<0.3V
>2.0V
NC
OUTPUT
OUT
3010 TA01
U
1µF
V
OUT
5V
50mA
Dropout Voltage
350
300
250
200
150
100
DROPOUT VOLTAGE (mV)
50
0
10 20 30 50
0
OUTPUT CURRENT (mA)
40
3010 TA02
3010f
1
LT3010/LT3010-5
PACKAGE/ORDER I FOR ATIO
UU
W
WWWU
ABSOLUTE AXI U RATI GS
(Note 1)
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
TOP VIEW
8
OUT
SENSE/ADJ*
*SENSE FOR LT3010-5, ADJ FOR LT3010
T
JMAX
SEE APPLICATIONS INFORMATION SECTION.
1
2
NC
3
GND
4
MS8E PACKAGE
8-LEAD PLASTIC MSOP
= 125°C, θJA = 40°C/W, θJC = 16°C/W
EXPOSED PAD IS GND
(MUST BE SOLDERED TO PCB)
†
MEASURED AT BOTTOM PAD
7
6
5
IN
NC
NC
SHDN
†
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
LT3010EMS8E
LT3010EMS8E-5
MS8 PART MARKING
LTZF
LTAEF
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage LT3010 I
Regulated Output Voltage (Note 3) LT3010-5 VIN = 5.5V, I
ADJ Pin Voltage LT3010 V
(Notes 2,3) 4V < V
Line Regulation LT3010-5 ∆VIN = 5.5V to 80V, I
LT3010 (Note 2) ∆V
Load Regulation LT3010-5 VIN = 6V, ∆I
LT3010 (Note 2) V
Dropout Voltage I
= V
V
IN
OUT(NOMINAL)
(Notes 4, 5) I
GND Pin Current I
= V
V
IN
OUT(NOMINAL)
(Notes 4, 6) I
Output Voltage Noise C
= 1mA 100 150 mV
LOAD
I
= 1mA ● 190 mV
LOAD
= 10mA 200 260 mV
LOAD
I
= 10mA ● 350 mV
LOAD
I
= 50mA 300 370 mV
LOAD
I
= 50mA ● 550 mV
LOAD
= 0mA ● 30 60 µA
LOAD
I
= 1mA ● 100 180 µA
LOAD
= 10mA ● 400 700 µA
LOAD
I
= 50mA ● 1.8 3.3 mA
LOAD
= 10µF, I
OUT
LOAD
ADJ Pin Bias Current (Note 7) 50 100 nA
Shutdown Threshold V
SHDN Pin Current V
(Note 8) V
Quiescent Current in Shutdown V
= Off to On 1.3 2 V
OUT
V
= On to Off 0.3 0.8 V
OUT
= 0V 0.5 2 µA
SHDN
= 6V 0.1 0.5 µA
SHDN
= 6V, V
IN
= 0V 1 5 µA
SHDN
= 50mA ● 34 V
LOAD
= 1mA 4.925 5.000 5.075 V
LOAD
6V < V
IN
= 3V, I
IN
IN
= 3V to 80V, I
IN
V
= 6V, ∆I
IN
= 4V, ∆I
IN
= 4V, ∆I
V
IN
< 80V, 1mA < I
= 1mA 1.258 1.275 1.292 V
LOAD
< 80V, 1mA < I
LOAD
= 1mA to 50mA 25 50 mV
LOAD
= 1mA to 50mA ● 90 mV
LOAD
= 1mA to 50mA 10 20 mV
LOAD
= 1mA to 50mA ● 32 mV
LOAD
< 50mA ● 4.850 5.000 5.150 V
LOAD
< 50mA ● 1.237 1.275 1.313 V
LOAD
= 1mA ● 315mV
LOAD
= 1mA ● 313mV
= 50mA, BW = 10Hz to 100kHz 100 µV
RMS
2
3010f
LT3010/LT3010-5
TEMPERATURE (°C)
–50
0
DROPOUT VOLTAGE (mV)
50
150
200
250
500
350
0
50
75
3010 G03
100
400
450
300
–25
25
100
125
IL = 50mA
IL = 10mA
IL = 1mA
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Ripple Rejection LT3010 V
LT3010-5 V
Current Limit V
= 7V, V
IN
OUT
LT3010-5 V
LT3010 (Note 2) V
Input Reverse V
= –80V, V
IN
Leakage Current
Reverse Output Current LT3010-5 V
(Note 9) LT3010 (Note 2) V
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
= 7V(Avg), V
IN
= 7V(Avg), V
IN
RIPPLE
RIPPLE
= 0.5V
= 0.5V
P-P
P-P
, f
RIPPLE
, f
RIPPLE
= 120Hz, I
= 120Hz, I
= 50mA 65 75 dB
LOAD
= 50mA 60 68 dB
LOAD
= 0V 140 mA
= 6V, ∆V
IN
= 4V, ∆V
IN
= 0V ● 6mA
OUT
= 5V, VIN < 5V 10 20 µA
OUT
= 1.275V, V
OUT
= –0.1V ● 60 mA
OUT
= –0.1V ● 60 mA
OUT
< 1.275V 8 15 µA
IN
Note 6: GND pin current is tested with V
IN
= V
(nominal) and a current
OUT
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
400
350
300
250
200
150
DROPOUT VOLTAGE (mV)
100
50
0
0
TJ = 125°C
T
105
OUTPUT CURRENT (mA)
= 25°C
J
2015
30 35 45
25
UW
Guaranteed Dropout Voltage Dropout Voltage
600
= TEST POINTS
500
400
300
200
DROPOUT VOLTAGE (mV)
100
0
40
50
3010 G01
10 20 30 40
TJ ≤ 125°C
TJ ≤ 25°C
505015253545
OUTPUT CURRENT (mA)
3010 G02
3010f
3
LT3010/LT3010-5
TEMPERATURE (°C)
–50
SHDN PIN THRESHOLD (V)
1.4
25
3010 G12
0.8
0.4
–25 0 50
0.2
0
1.6
1.2
1.0
0.6
75 100 125
OFF-TO-ON
ON-TO-OFF
TEMPERATURE (°C)
–50
OUTPUT VOLTAGE (V)
5.06
25
3010 G05
5.00
4.96
–25 0 50
4.94
4.92
5.08
5.04
5.02
4.98
75 100 125
IL = 1mA
UW
TYPICAL PERFOR A CE CHARACTERISTICS
Quiescent Current LT3010-5 Output VoltageLT3010 ADJ Pin Voltage
40
35
V
= V
SHDN
30
IN
1.295
1.290
1.285
IL = 1mA
10
1.280
1.275
1.270
ADJ PIN VOLTAGE (V)
1.265
1.260
1.255
–25 0 50
–50
LT3010-5 Quiescent CurrentLT3010 Quiescent Current
200
TJ = 25°C
180
= ∞
R
L
160
140
120
100
80
60
QUIESCENT CURRENT (µA)
40
20
0
21
0
25
TEMPERATURE (°C)
V
SHDN
V
SHDN
67 9
43
5
INPUT VOLTAGE (V)
75 100 125
3010 G06
= V
IN
= 0V
8
3010 G07
LT3010 GND Pin Current
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
GND PIN CURRENT (mA)
0.4
0.2
10
0
21
0
INPUT VOLTAGE (V)
TJ = 25°C
*FOR V
OUT
RL = 25.5Ω
= 50mA*
I
L
I
RL = 127Ω
I
= 10mA*
L
RL = 1.27k IL = 1mA*
67 9
43
5
= 1.275V
RL = 51Ω
= 25mA*
L
8
3010 G10
10
25
VIN > 6V
= ∞, IL = 0 (LT3010-5)
R
20
L
R
= 250k, IL = 5µA (LT3010)
L
15
10
QUIESCENT CURRENT (µA)
5
0
–25 0 50
–50
50
TJ = 25°C
45
=
R
L
40
35
30
25
20
15
QUIESCENT CURRENT (µA)
10
5
0
0
V
TEMPERATURE (°C)
∞
21
INPUT VOLTAGE (V)
SHDN
25
V
V
43
= 0V
SHDN
SHDN
5
75 100 125
= V
IN
= 0V
67 9
8
3010 G04
3010 G08
LT3010-5 GND Pin Current
2.0
TJ = 25°C
1.8
*FOR V
1.6
1.4
1.2
1.0
0.8
0.6
GND PIN CURRENT (mA)
0.4
0.2
4
0
0
= 5V
OUT
21
INPUT VOLTAGE (V)
RL = 100Ω
I
RL = 200Ω
I
RL = 500Ω
I
RL = 5k, IL = 1mA*
67 9
43
5
= 50mA*
L
= 25mA*
L
= 10mA*
L
GND Pin Current vs I
2.0
VIN = V
0
T
0
OUT(NOMINAL)
= 25°C
J
105
OUTPUT CURRENT (mA)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
GND PIN CURRENT (mA)
0.4
0.2
8
10
3010 G09
+ 1V
2015
LOAD
30 35 45
25
40
50
3010 G11
SHDN Pin Threshold
3010f
UW
TEMPERATURE (°C)
–50
ADJ PIN BIAS CURRENT (nA)
70
25
3010 G15
40
20
–25 0 50
10
0
80
60
50
30
75 100 125
TYPICAL PERFOR A CE CHARACTERISTICS
LT3010/LT3010-5
SHDN Pin Current ADJ Pin Bias Current
0.6
TJ = 25°C
CURRENT FLOWS
OUT OF SHDN PIN
0.5
0.4
0.3
0.2
SHDN PIN CURRENT (µA)
0.1
0
1234
SHDN PIN VOLTAGE (V)
50.50 1.5 2.5 3.5 4.5
3010 G13
Current Limit Reverse Output Current
200
V
= 0V
OUT
180
= 25°C
T
J
160
140
120
100
80
60
CURRENT LIMIT (mA)
40
20
0
21
0
INPUT VOLTAGE (V)
43
5
67 9
8
3010 G16
10
SHDN Pin Current
0.8
V
= 0V
SHDN
CURRENT FLOWS
0.7
OUT OF SHDN PIN
0.6
0.5
0.4
0.3
0.2
SHDN PIN CURRENT (µA)
0.1
0
–25 0 50
–50
Current Limit
200
VIN = 7V
180
V
= 0V
OUT
160
140
120
100
80
60
CURRENT LIMIT (mA)
40
20
0
–50
–25
25
TEMPERATURE (°C)
50
25
0
TEMPERATURE (°C)
75 100 125
3010 G14
100
125
3010 G17
75
100
90
80
70
60
50
40
30
20
REVERSE OUTPUT CURRENT (µA)
10
0
0
TJ = 25°C
V
= 0V
IN
CURRENT FLOWS
INTO OUTPUT PIN
= V
V
OUT
V
OUT
(LT3010-5)
(LT3010)
ADJ
= V
SENSE
LT3010
21
OUTPUT VOLTAGE (V)
(SEE APPLICATIONS
INFORMATION)
LT3010-5
67 9
43
5
ADJ
PIN CLAMP
8
10
3010 G18
24
VIN = 0V
= V
V
OUT
21
= V
V
OUT
18
15
12
9
6
REVERSE OUTPUT CURRENT (µA)
3
0
–25 0 50
–50
= 1.275V (LT3010)
ADJ
= 5V (LT3010-5)
SENSE
LT3010-5
LT3010
25
TEMPERATURE (°C)
75 100 125
3010 G19
Input Ripple RejectionReverse Output Current Input Ripple Rejection
80
78
76
74
72
70
68
66
RIPPLE REJECTION (dB)
64
VIN = 7V + 0.5V
= 50mA
I
L
62
= 1.275V
V
OUT
60
–50
–25
0
TEMPERATURE (°C)
RIPPLE AT f = 120Hz
P-P
50
25
75
100
125
3010 G20
100
VIN = 7V + 50mV
90
= 50mA
I
L
80
70
60
50
40
30
RIPPLE REJECTION (dB)
20
10
0
100 1k 10k 100k 1M
10
FREQUENCY (Hz)
RMS
RIPPLE
C
OUT
= 1µF
C
= 10µF
OUT
3010 G21
3010f
5
Loading...