LT3014B
20mA, 3V to 80V
Low Dropout Micropower
Linear Regulator
FEATURES
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DESCRIPTIO
Wide Input Voltage Range: 3V to 80V
Low Quiescent Current: 7µA
Low Dropout Voltage: 350mV
Output Current: 20mA
LT3014BHV Survives 100V Transients (2ms)
No Protection Diodes Needed
Adjustable Output from 1.22V to 60V
Stable with 0.47µF Output Capacitor
Stable with Aluminum, Tantalum or Ceramic
Capacitors
Reverse-Battery Protection
No Reverse Current Flow from Output
Thermal Limiting
Available in 5-Lead ThinSOT
TM
and
8-Lead DFN Packages
The LT
®
3014B is a high voltage, micropower low dropout
linear regulator. The device is capable of supplying 20mA
of output current with a dropout voltage of 350mV. De-
signed for use in battery-powered or high voltage sys-
tems, the low quiescent current (7µA operating) makes
the LT3014B an ideal choice. Quiescent current is also well
controlled in dropout.
Other features of the LT3014B include the ability to oper-
ate with very small output capacitors. The regulators are
stable with only 0.47µF 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 as an adjustable device with a 1.22V
reference voltage. The LT3014B regulator is available in
the 5-lead ThinSOT and 8-lead DFN packages.
, LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is
a trademark of Linear Technology Corporation. All other trademarks are the property of
their respective owners. Protected by U.S. Patents including 6118263, 6144250.
APPLICATIO S
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Low Current High Voltage Regulators
Regulator for Battery-Powered Systems
Telecom Applications
Automotive Applications
TYPICAL APPLICATIO
5V Supply
IN
V
IN
5.4V TO
80V
1µF
400
350
OUT
LT3014B
ADJ
GND
1.27M
3.92M
V
OUT
5V
20mA
0.47µF
DROPOUT VOLTAGE (mV)
300
250
200
150
100
50
0
0
2
4
6 8 10 12 14 16 18 20
OUTPUT CURRENT (mA)
3014 TA02
3014 TA01
U
Dropout Voltage
3014bf
U
U
1
LT3014B
ABSOLUTE
(Note 1)
AXI U
RATI GS
Storage Temperature Range
ThinSOT Package......................... –65°C to 150°C
DFN Package ............................... –65°C to 125°C
Operating Junction Temperature Range
(Notes 3, 9, 10) ........................... –40°C to 125°C
Lead Temperature, SOT-23
(Soldering, 10 sec) ..................................... 300°C
IN Pin Voltage, Operating .................................
±80V
Transient (2ms Survival, LT3014BHV) ........... +100V
OUT Pin Voltage ...............................................
±60V
IN to OUT Differential Voltage ...........................
±80V
ADJ Pin Voltage ..................................................
±7V
Output Short-Circuit Duration ..................... Indefinite
PACKAGE/ORDER I FOR ATIO
TOP VIEW
IN 1
GND 2
NC 3
4 ADJ
5 OUT
ORDER PART
NUMBER
LT3014BES5
LT3014BHVES5
S5 PART MARKING
LTCHK
LTCHN
S5 PACKAGE
5-LEAD PLASTIC SOT-23
T
JMAX
= 125°C,
θ
JA
= 150°C/ W
θ
JC
= 25°C/ W MEASURED AT PIN 2.
SEE APPLICATIONS INFORMATION SECTION.
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.
ELECTRICAL CHARACTERISTICS
The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
J
= 25°C.
PARAMETER
Minimum Input Voltage
ADJ Pin Voltage
(Notes 2, 3)
Line Regulation
Load Regulation
Dropout Voltage
V
IN
= V
OUT(NOMINAL)
(Notes 4, 5)
CONDITIONS
I
LOAD
= 20mA
V
IN
= 3.3V, I
LOAD
= 100µA
3.3V < V
IN
< 80V, 100µA < I
LOAD
< 20mA
∆V
IN
= 3.3V to 80V, I
LOAD
= 100µA (Note 2)
V
IN
= 3.3V,
∆I
LOAD
= 100µA to 20mA (Note 2)
V
IN
= 3.3V,
∆I
LOAD
= 100µA to 20mA
I
LOAD
= 100µA
I
LOAD
= 100µA
I
LOAD
= 1mA
I
LOAD
= 1mA
I
LOAD
= 10mA
I
LOAD
= 10mA
I
LOAD
= 20mA
I
LOAD
= 20mA
GND Pin Current
V
IN
= V
OUT(NOMINAL)
(Notes 4, 6)
I
LOAD
= 0mA
I
LOAD
= 100µA
I
LOAD
= 1mA
I
LOAD
= 10mA
I
LOAD
= 20mA
●
2
U
U
W
W W
U
W
TOP VIEW
OUT
ADJ
NC
GND
1
2
3
4
9
8
7
6
5
IN
NC
NC
NC
ORDER PART
NUMBER
LT3014BEDD
LT3014BHVEDD
DD PART MARKING
LCHM
LCHP
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
EXPOSED PAD IS GND (PIN 9)
MUST BE SOLDERED TO PCB
T
JMAX
= 125°C,
θ
JA
= 40°C/ W
θ
JC
= 10°C/ W MEASURED AT PIN 9.
MIN
1.200
●
1.180
●
●
TYP
3
1.220
1.220
1
13
120
MAX
3.3
1.240
1.260
10
25
40
180
250
270
360
350
450
410
570
20
30
100
450
1000
UNITS
V
V
V
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
µA
µA
µA
µA
µA
3014bf
●
200
●
300
●
350
●
●
●
●
●
●
7
12
40
250
650
LT3014B
ELECTRICAL CHARACTERISTICS
The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
J
= 25°C.
PARAMETER
Output Voltage Noise
ADJ Pin Bias Current
Ripple Rejection
Current Limit
Input Reverse
Leakage Current
Reverse Output Current
(Note 8)
CONDITIONS
C
OUT
= 0.47µF, I
LOAD
= 20mA, BW = 10Hz to 100kHz
(Note 7)
V
IN
= 7V(Avg), V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz, I
LOAD
= 20mA
V
IN
= 7V, V
OUT
= 0V
V
IN
= 3.3V,
∆V
OUT
= –0.1V (Note 2)
V
IN
= –80V, V
OUT
= 0V
V
OUT
= 1.22V, V
IN
< 1.22V (Note 2)
●
●
MIN
TYP
115
4
MAX
10
UNITS
µV
RMS
nA
dB
mA
mA
60
25
70
70
6
2
4
mA
µA
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 LT3014B 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 LT3014B
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 adds 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 is 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
decreases slightly at higher input voltages.
Note 7:
ADJ pin bias current flows into the ADJ pin.
Note 8:
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 of the GND pin.
Note 9:
The LT3014BE 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 10:
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)
DROPOUT VOLTAGE (mV)
400
350
300
250
200
150
100
50
0
T
J
= 125°C
T
J
= 25°C
0
2
4
6 8 10 12 14 16 18 20
OUTPUT CURRENT (mA)
3014 G01
U W
Guaranteed Dropout Voltage
600
500
400
300
200
100
0
0
2
4
6 8 10 12 14 16 18 20
OUTPUT CURRENT (mA)
3014 G02
Dropout Voltage
500
450
= TEST POINTS
T
J
≤
125°C
400
350
300
250
200
150
100
50
0
–50 –25
50
25
0
75
TEMPERATURE (°C)
100
125
I
L
= 100µA
I
L
= 1mA
I
L
= 20mA
I
L
= 10mA
T
J
≤
25°C
3014 G03
3014bf
3
LT3014B
TYPICAL PERFOR A CE CHARACTERISTICS
Quiescent Current
16
14
QUIESCENT CURRENT (µA)
ADJ PIN VOLTAGE (V)
12
10
8
6
4
2
0
– 50 – 25
0
50
75
25
TEMPERATURE (°C)
100
125
1.230
1.225
1.220
QUIESCENT CURRENT (µA)
V
IN
= 6V
R
L
=
∞
I
L
= 0
GND Pin Current
1000
T
J
= 25°C
900 *FOR V
OUT
= 1.22V
800
GND PIN CURRENT (µA)
1000
700
600
500
400
300
200
100
0
0
1
2
R
L
= 61Ω
I
L
= 20mA*
ADJ PIN BIAS CURRENT (nA)
GND PIN CURRENT (µA)
R
L
= 122Ω
I
L
= 10mA*
R
L
= 1.22k
I
L
= 1mA*
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
Current Limit
80
100
90
80
REVERSE OUTPUT CURRENT (µA)
V
OUT
= 0V
70 T
J
= 25°C
CURRENT LIMIT (mA)
CURRENT LIMIT (mA)
60
50
40
30
20
10
0
0
2
4
6 8 10 12 14 16 18 20
INPUT VOLTAGE (V)
3014 G13
4
U W
3014 G04
3014 G07
ADJ Pin Voltage
1.240
1.235
Quiescent Current
16
T
J
= 25°C
14 R
L
=
∞
V
OUT
= 1.22V
12
10
8
6
4
2
0
I
L
= 100µA
1.215
1.210
1.205
1.200
– 50
– 25
0
75
50
25
TEMPERATURE (°C)
100
125
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
3014 G05
3014 G06
GND Pin Current vs I
LOAD
V
IN
= 3.3V
900 T
J
= 25°C
= 1.22V
V
800
OUT
700
600
500
400
300
200
100
0
0
2
4
6 8 10 12 14 16 18 20
OUTPUT CURRENT (mA)
3014 G08
ADJ Pin Bias Current
14
12
10
8
6
4
2
0
– 50 – 25
0
50
75
25
TEMPERATURE (°C)
100
125
3014 G12
Current Limit
V
IN
= 7V
V
OUT
= 0V
Reverse Output Current
50
T
J
= 25°C
45 V
IN
= 0V
= V
ADJ
V
40
OUT
35
30
25
20
15
10
5
0
CURRENT FLOWS
INTO OUTPUT PIN
ADJ PIN
ESD CLAMP
70
60
50
40
30
20
10
0
–50 –25
50
25
0
75
TEMPERATURE (°C)
100
125
0
1
2
3 4 5 6 7 8
OUTPUT VOLTAGE (V)
9
10
3014 G14
3014 G15
3014bf
LT3014B
TYPICAL PERFOR A CE CHARACTERISTICS
Reverse Output Current
8
REVERSE OUTPUT CURRENT (µA)
7
6
5
4
3
2
1
V
IN
= 0V
V
OUT
= V
ADJ
= 1.22V
RIPPLE REJECTION (dB)
66
64
62
60
58
56
– 50 – 25
0
50
75
25
TEMPERATURE (°C)
100
125
RIPPLE REJECTION (dB)
0
– 50 – 25
0
50
75
25
TEMPERATURE (°C)
Minimum Input Voltage
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–50 –25
LOAD REGULATION (mV)
I
LOAD
= 20mA
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
MINIMUM INPUT VOLTAGE (V)
25
75
0
50
TEMPERATURE (°C)
10Hz to 100kHz Output Noise
OUTPUT VOLTAGE
DEVIATION (V)
V
OUT
200µV/DIV
LOAD CURRENT (mA)
C
OUT
= 0.47µF
I
L
= 20mA
V
OUT
= 1.22V
U W
100
3014 G16
Input Ripple Rejection
72
V
IN
= 7V + 0.5V
P-P
70 RIPPLE AT f = 120Hz
I
L
= 20mA
68
Input Ripple Rejection
80
70
60
50
40
30
20
10
0
10
100
C
OUT
= 0.47µF
1k
10k
FREQUENCY (Hz)
100k
1M
3014 G18
V
IN
= 7V + 50mV
RMS
RIPPLE
I
L
= 20mA
C
OUT
= 4.7µF
125
3014 G17
Load Regulation
0
–5
–10
–15
–20
–25
–30
–35
100
125
–40
– 50 – 25
0
25
50
75
100
125
∆I
L
= 100µA TO 20mA
V
OUT
= 1.22V
10
Output Noise Spectral Density
C
OUT
= 0.47µF
I
L
= 20mA
V
OUT
= 1.22V
1
0.1
0.01
10
100
1k
10k
FREQUENCY (Hz)
100k
3014 G21
TEMPERATURE (°C)
3014 G19
3014 G20
Transient Response
0.04
0.02
0
–0.02
–0.04
V
IN
= 7V
V
OUT
= 5V
C
IN
= C
OUT
= 0.47µF CERAMIC
∆I
LOAD
= 1mA TO 5mA
6
4
2
0
0
200
600
400
TIME (µs)
800
1000
3014 G23
1ms/DIV
3014 G22
3014bf
5
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