LINEAR TECHNOLOGY LT3010, LT3010-5 Technical data

LT3010/LT3010-5
50mA, 3V to 80V
Low Dropout
FEATURES
n
Wide Input Voltage Range: 3V to 80V
n
Low Quiescent Current: 30μA
n
Low Dropout Voltage: 300mV
n
Output Current: 50mA
n
Thermally Enhanced 8-Lead MSOP Package
n
No Protection Diodes Needed
n
Fixed Output Voltage: 5V (LT3010-5)
n
Adjustable Output from 1.275V to 60V (LT3010)
n
1μA Quiescent Current in Shutdown
n
Stable with 1μF Output Capacitor
n
Stable with Aluminum, Tantalum or Ceramic
Capacitors
n
Reverse-Battery Protection
n
No Reverse Current Flow from Output
n
Thermal Limiting
APPLICATIONS
n
Low Current High Voltage Regulators
n
Regulator for Battery-Powered Systems
n
Telecom Applications
n
Automotive Applications
DESCRIPTION
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 shutdown) 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 fi xed 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.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
5V Supply with Shutdown
IN
LT3010-5
SHDN
OUT
SENSE
GND
30105 TA01
V
SHDN
V
IN
5.4V TO 80V
(PIN 5)
<0.3V >2.0V
1μF
OUTPUT
OFF
ON
1μF
V
OUT
5V 50mA
350
300
250
200
150
100
DROPOUT VOLTAGE (mV)
50
0
0
Dropout Voltage
10 20 30 50
OUTPUT CURRENT (mA)
40
30105 TA02
30105fc
1
LT3010/LT3010-5
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
(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 ......................... Indefi nite
Storage Temperature Range .................. –65°C to 150°C
Operating Junction Temperature Range
(Notes 3, 10, 11)
OUT
SENSE/ADJ*
GND
*SENSE FOR LT3010-5, ADJ FOR LT3010
= 125°C (LT3010E), θJA = 40°C/W, θJC = 16°C/W†
T
JMAX
= 140°C (LT3010H), θJA = 40°C/W, θJC = 16°C/W†
T
JMAX
SEE APPLICATIONS INFORMATION SECTION.
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
TOP VIEW
1 2
NC
3 4
MS8E PACKAGE
8-LEAD PLASTIC MSOP
†MEASURED AT BOTTOM PAD
8 7
9
6 5
IN NC NC
SHDN
LT3010E ............................................. –40°C to 125°C
LT3010H ............................................–40°C to 140°C
Lead Temperature (Soldering, 10 sec) ................. 300°C
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3010EMS8E#PBF LT3010EMS8E#TRPBF LTZF 8-Lead Plastic MSOP –40°C to 125°C LT3010EMS8E-5#PBF LT3010EMS8E-5#TRPBF LTAEF 8-Lead Plastic MSOP –40°C to 125°C LT3010HMS8E#PBF LT3010HMS8E#TRPBF LTCLP 8-Lead Plastic MSOP –40°C to 140°C LT3010HMS8E-5#PBF LT3010HMS8E-5#TRPBF LTCLQ 8-Lead Plastic MSOP –40°C to 140°C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3010EMS8E LT3010EMS8E#TR LTZF 8-Lead Plastic MSOP –40°C to 125°C LT3010EMS8E-5 LT3010EMS8E-5#TR LTAEF 8-Lead Plastic MSOP –40°C to 125°C LT3010HMS8E LT3010HMS8E #TR LTCLP 8-Lead Plastic MSOP –40°C to 140°C LT3010HMS8E-5 LT3010HMS8E-5 #TR LTCLQ 8-Lead Plastic MSOP –40°C to 140°C Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to:
http://www.linear.com/leadfree/
http://www.linear.com/tapeandreel/
(LT3010E) The
ELECTRICAL CHARACTERISTICS
l denotes the specifi cations which apply over the –40°C to
125°C operating temperature range, otherwise specifi cations are at TJ = 25°C.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage LT3010 I Regulated Output Voltage
(Note 3) ADJ Pin Voltage (Notes 2, 3) LT3010 VIN = 3V, I
Line Regulation LT3010-5 ΔVIN = 5.5V to 80V, I
Load Regulation LT3010-5 VIN = 6V, ΔI
LT3010-5 V 6V < V
4V < V
LT3010 (Note 2) ΔV
V
= 50mA
LOAD
= 5.5V, I
IN
IN
IN
= 3V to 80V, I
IN
= 6V, ΔI
IN
= 1mA
LOAD
< 80V, 1mA < I
= 1mA
LOAD
< 80V, 1mA < I
= 1mA to 50mA
LOAD
= 1mA to 50mA l
LOAD
LOAD
LOAD
< 50mA l
LOAD
< 50mA l
LOAD
= 1mA
= 1mA
l
4.925
4.850
1.258
1.237
l
34 V
5.000
5.000
1.275
1.275
5.075
5.150
1.292
1.313
3
15
3
13
25 50
90
mV mV
mV mV
30105fc
2
V V
V V
LT3010/LT3010-5
ELECTRICAL CHARACTERISTICS
(LT3010E) The l denotes the specifi cations which apply over the –40°C to
= 0.5V = 0.5V
= 25°C.
J
, f
P-P
RIPPLE
, f
P-P
RIPPLE
= 120Hz, I = 120Hz, I
LOAD LOAD
= 50mA = 50mA
10 20
32
100 150
190
200 260
350
300 370
550
l l l l
l l
0.3
30 100 400
1.8
1.3
1.1
60 180 700
3.3
2V
0.5
0.120.5
65
75
60
68
mV mV
mV mV
mV mV
mV mV
μA μA μA
mA
RMS
μA μA
dB dB
140 mA
l
60
l
60
l
10
8
6mA
20
15
mA mA
μA μA
125°C operating temperature range, otherwise specifi cations are at T
PARAMETER CONDITIONS MIN TYP MAX UNITS
= 4V, ΔI
IN
= 4V, ΔI
IN
= 50mA, BW = 10Hz to 100kHz 100 μV
LOAD
Dropout Voltage V
= V
IN
OUT(NOMINAL)
(Notes 4, 5)
GND Pin Current V
= V
IN
OUT(NOMINAL)
(Notes 4, 6)
Output Voltage Noise C
LT3010 (Note 2) V V
= 1mA
I
LOAD
I
= 1mA l
LOAD
I
= 10mA
LOAD
I
= 10mA l
LOAD
I
= 50mA
LOAD
I
= 50mA l
LOAD
= 0mA
I
LOAD
I
= 1mA
LOAD
I
= 10mA
LOAD
I
= 50mA
LOAD
= 10μF, I
OUT
ADJ Pin Bias Current (Note 7) 50 100 nA Shutdown Threshold V
SHDN Pin Current (Note 8)
Quiescent Current in Shutdown V Ripple Rejection LT3010 V
Current Limit V
Input Reverse Leakage Current VIN = –80V, V Reverse Output Current
(Note 9)
= Off to On
OUT
V
= On to Off
OUT
= 0V
V
SHDN
V
= 6V
SHDN
= 6V, V
IN
= 0V 1 5 μA
SHDN
LT3010-5 V
= 7V, V
IN
OUT
= 0V LT3010-5 V LT3010 (Note 2) V
= 0V
OUT
LT3010-5 V LT3010 (Note 2) V
= 7V(Avg), V
IN
= 7V(Avg), V
IN
= 6V, ΔV
IN
= 4V, ΔV
IN
= 5V, VIN < 5V
OUT
= 1.275V, VIN < 1.275V
OUT
= 1mA to 50mA
LOAD
= 1mA to 50mA l
LOAD
RIPPLE RIPPLE
= –0.1V
OUT
= –0.1V
OUT
V
(LT3010H) The l denotes the specifi cations which apply over the –40°C to 140°C operating temperature range, otherwise specifi cations are at TJ = 25°C.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage LT3010 I Regulated Output Voltage
(Note 3)
LT3010-5 V 6V < V
ADJ Pin Voltage (Notes 2, 3) LT3010 VIN = 3V, I
4.25V < V
LOAD
= 5.5V, I
IN
= 50mA
= 1mA
LOAD
< 80V, 1mA < I
IN
= 1mA
LOAD
< 80V, 1mA < I
IN
Line Regulation LT3010-5 ΔVIN = 5.5V to 80V, I
LT3010 (Note 2) ΔV
Load Regulation LT3010-5 VIN = 6V, ΔI
V LT3010 (Note 2) VIN = 4V, ΔI
V
= 3V to 80V, I
IN
= 6V, ΔI
IN
= 4.25V, ΔI
IN
= 1mA to 50mA
LOAD
= 1mA to 50mA l
LOAD
= 1mA to 50mA
LOAD
LOAD
< 50mA l
LOAD
< 50mA l
LOAD
= 1mA
LOAD
= 1mA
LOAD
= 1mA to 50mA l
l
4.925
4.825
1.258
1.230
l l
3 4.25 V
5.000
5.000
1.275
1.275
5.075
5.15
1.292
1.313
3
20
3
15
25 50
100
10 20
45
mV mV
mV mV
mV mV
30105fc
3
V V
V V
LT3010/LT3010-5
ELECTRICAL CHARACTERISTICS
(LT3010H) The l denotes the specifi cations which apply over the –40°C to
= 0.5V = 0.5V
= 25°C.
J
, f
P-P
RIPPLE
, f
P-P
RIPPLE
= 120Hz, I = 120Hz, I
LOAD LOAD
= 50mA = 50mA
100 150
220
200 260
380
300 370
600
l l l l
l l
0.3
30 100 400
1.8
1.3
0.8
80 200 750
3.5
2V
0.5
0.120.5
65 60
l l
55
l
55
l
75 68
140 mA
6mA
10
20
8
15
mV mV
mV mV
mV mV
μA μA μA
mA
RMS
μA μA
dB dB
mA mA
μA μA
140°C operating temperature range, otherwise specifi cations are at T
PARAMETER CONDITIONS MIN TYP MAX UNITS
Dropout Voltage
= V
V
IN
OUT(NOMINAL)
(Notes 4, 5)
GND Pin Current V
= V
IN
OUT(NOMINAL)
(Notes 4, 6)
Output Voltage Noise C ADJ Pin Bias Current (Note 7) 50 100 nA Shutdown Threshold V
SHDN Pin Current (Note 8)
Quiescent Current in Shutdown V Ripple Rejection LT3010 V
Current Limit V
Input Reverse Leakage Current VIN = –80V, V Reverse Output Current
(Note 9)
= 1mA
I
LOAD
I
= 1mA l
LOAD
I
= 10mA
LOAD
I
= 10mA l
LOAD
I
= 50mA
LOAD
I
= 50mA l
LOAD
= 0mA
I
LOAD
I
= 1mA
LOAD
I
= 10mA
LOAD
I
= 50mA
LOAD
= 10μF, I
OUT
= Off to On
OUT
V
= On to Off
OUT
= 0V
V
SHDN
V
= 6V
SHDN
= 6V, V
IN
LT3010-5 V
= 7V, V
IN
LT3010-5 V LT3010 (Note 2) V
LT3010-5 V LT3010 (Note 2) V
= 250mA, BW = 10Hz to 100kHz 100 μV
LOAD
= 0V 1 5 μA
SHDN
= 7V(Avg), V
OUT
= 0V
OUT
IN
= 7V(Avg), V
IN
= 6V, ΔV
IN
= 4.25V, ΔV
IN
= 0V
= 5V, VIN < 5V
OUT
= 1.275V, VIN < 1.275V
OUT
OUT
RIPPLE RIPPLE
= –0.1V
= –0.1V
OUT
V
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 LT3010 (adjustable version) is tested and specifi ed 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 specifi cation 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 specifi ed 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 specifi ed output current. In dropout, the output voltage will be equal to (V
Note 6: GND pin current is tested with V
IN
– V
DROPOUT
= V
IN
).
(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 fl ows into the ADJ pin. Note 8: SHDN pin current fl ows 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 fl ows into the OUT pin and out the GND pin.
Note 10: The LT3010E is guaranteed to meet performance specifi cations from 0°C to 125°C operating junction temperature. Specifi cations over the –40°C to 125°C operating junction temperature range are assured by design, characterization and correlation with statistical process controls. The LT3010H is tested to the LT3010H Electrical Characteristics table at 140°C operating junction temperature. High junction temperatures degrade operating lifetimes. Operating lifetime is derated at junction temperatures greater than 125°C.
Note 11: This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed 125°C (LT3010E) or 140°C (LT3010H) when overtemperature protection is active. Continuous operation above the specifi ed maximum operating junction temperature may impair device reliability.
30105fc
4
LT3010/LT3010-5
TYPICAL PERFORMANCE CHARACTERISTICS
Typical Dropout Voltage Guaranteed Dropout Voltage Dropout Voltage
500
450
400
350
300
250
200
150
DROPOUT VOLTAGE (mV)
100
50
0
0
TJ = 125°C
= 25°C
T
J
1052015 30 35 4525 50
OUTPUT CURRENT (mA)
40
30105 G01
600
500
400
300
200
DROPOUT VOLTAGE (mV)
100
0
= TEST POINTS
TJ ≤ 125°C
TJ ≤ 25°C
10 20 30 40
OUTPUT CURRENT (mA)
505015253545
30105 G02
Quiescent Current LT3010 ADJ Pin Voltage LT3010-5 Output Voltage
40
35
V
30
25
VIN > 6V
= ∞, IL = 0 (LT3010-5)
R
20
L
= 250k, IL = 5μA (LT3010)
R
L
15
10
QUIESCENT CURRENT (μA)
5
0
–25 0 50
–50
SHDN
V
25
TEMPERATURE (°C)
SHDN
= V
= 0V
IN
75 100 125 150
30105 G04
1.295 IL = 1mA
1.290
1.285
1.280
1.275
1.270
ADJ PIN VOLTAGE (V)
1.265
1.260
1.255
–50 0 50 75–25 25 100 150125
TEMPERATURE (°C)
30105 G05
500
450
400
350
300
250
200
150
DROPOUT VOLTAGE (mV)
100
50
0
–50 0 50 75–25 25 100 150125
5.08 IL = 1mA
5.06
5.04
5.02
5.00
4.98
OUTPUT VOLTAGE (V)
4.96
4.94
4.92
–50 0 50 75–25 25 100 150125
IL = 50mA
IL = 10mA
IL = 1mA
TEMPERATURE (°C)
TEMPERATURE (°C)
30105 G03
30105 G06
LT3010 Quiescent Current LT3010-5 Quiescent Current LT3010 GND Pin Current
50
TJ = 25°C
45
= ∞
R
L
40
35
30
25
20
15
QUIESCENT CURRENT (μA)
10
5
0
0
2143679510
INPUT VOLTAGE (V)
V
V
SHDN
SHDN
= V
= 0V
IN
8
30105 G07
200
TJ = 25°C
180
= ∞
R
L
160
140
120
100
80
60
QUIESCENT CURRENT (μA)
40
20
0
0
2143679510
INPUT VOLTAGE (V)
V
V
SHDN
SHDN
= V
= 0V
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
IN
8
30105 G08
GND PIN CURRENT (mA)
0.4
0.2
0
0
2143679510
RL = 25.5Ω
I
I
RL = 1.27k IL = 1mA*
INPUT VOLTAGE (V)
TJ = 25°C *FOR V
= 50mA*
L
RL = 127Ω
= 10mA*
L
= 1.275V
OUT
RL = 51Ω
= 25mA*
I
L
8
30105 G09
30105fc
5
LT3010/LT3010-5
TYPICAL PERFORMANCE CHARACTERISTICS
LT3010-5 GND Pin Current GND Pin Current vs I
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
0
0
= 5V
OUT
2143679510
INPUT VOLTAGE (V)
RL = 100Ω
= 50mA*
I
L
RL = 200Ω
= 25mA*
I
L
RL = 500Ω
= 10mA*
I
L
RL = 5k, IL = 1mA*
8
30105 G10
2.0 VIN = V
1.8
1.6
1.4
1.2
1.0
0.8
0.6
GND PIN CURRENT (mA)
0.4
0.2
0
OUT(NOMINAL)
= 25°C
T
J
0
1052015 30 35 4525 50
OUTPUT CURRENT (mA)
LOAD
+ 1V
40
30105 G11
SHDN Pin Threshold
1.6
1.4
1.2
1.0
0.8
0.6
0.4
SHDN PIN THRESHOLD (V)
0.2
0
–50 25–25 0 50 75 100 125 150
SHDN Pin Current SHDN Pin Current ADJ Pin Bias Current
0.6
0.5
0.4
0.3
0.2
SHDN PIN CURRENT (μA)
0.1
0
1234
TJ = 25°C CURRENT FLOWS OUT OF SHDN PIN
SHDN PIN VOLTAGE (V)
30105 G13
50.50 1.5 2.5 3.5 4.5
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
–50 25–25 0 50 75 100 125 150
TEMPERATURE (°C)
30105 G14
200
180
160
140
120
100
80
60
ADJ PIN BIAS CURRENT (nA)
40
20
0
–50 0 50 75–25 25 100 150125
OFF-TO-ON
ON-TO-OFF
TEMPERATURE (°C)
TEMPERATURE (°C)
30105 G12
30105 G15
Current Limit 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
0
2143679510
8
INPUT VOLTAGE (V)
30105 G16
200
VIN = 7V
180
160
140
120
100
CURRENT LIMIT (mA)
= 0V
V
OUT
80
60
40
20
0
–50 0 50 75–25 25 100 150125
TEMPERATURE (°C)
30105 G17
100
TJ = 25°C
90
= 0V
V
IN
CURRENT FLOWS
80
INTO OUTPUT PIN
= V
V
70
OUT
ADJ
= V
V
OUT
60
50
40
30
20
REVERSE OUTPUT CURRENT (μA)
10
0
0
SENSE
(LT3010-5)
LT3010
2143679510
6
(LT3010)
PIN CLAMP
(SEE APPLICATIONS
INFORMATION)
LT3010-5
OUTPUT VOLTAGE (V)
ADJ
8
30105 G18
30105fc
LT3010/LT3010-5
TYPICAL PERFORMANCE CHARACTERISTICS
Reverse Output Current Input Ripple Rejection Input Ripple Rejection
80
VIN = 0V
= V
V
OUT
70
V
OUT
60
50
40
30
20
REVERSE OUTPUT CURRENT (μA)
10
0
–50 0 50 75–25 25 100 150125
= 1.275V (LT3010)
ADJ
= V
= 5V (LT3010-5)
SENSE
LT3010-5
LT3010
TEMPERATURE (°C)
3010 G19
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 0 50 75–25 25 100 150125
RIPPLE AT f = 120Hz
P-P
TEMPERATURE (°C)
30105 G20
100
VIN = 7V + 50mV
90
= 50mA
I
L
80
70
60 50
40
30
RIPPLE REJECTION (dB)
20
10
0
10
100 1k 10k 100k 1M
RIPPLE
RMS
C
C
= 1μF
OUT
FREQUENCY (Hz)
OUT
= 10μF
30105 G21
LT3010 Minimum Input Voltage Load Regulation Output Noise Spectral Density
4.0 I
= 50mA
LOAD
3.5
3.0
2.5
2.0
1.5
1.0
MINIMUM INPUT VOLTAGE (V)
0.5
0
–50 0 50 75–25 25 100 150125
TEMPERATURE (°C)
30105 G22
0
ΔIL = 1mA TO 50mA
–5
–10
–15
–20
–25
–30
–35
LOAD REGULATION (mV)
–40
–45
–50
–50 0 50 75–25 25 100 150125
TEMPERATURE (°C)
LT3010-5
LT3010
30105 G23
10
C
= 1μF
OUT
= 50mA
I
L
1
0.1
OUTPUT NOISE SPECTRAL DENSITY (μV/√Hz)
0.01 10 1k 10k 100k
100
FREQUENCY (Hz)
LT3010-5 10Hz to 100kHz Output Noise LT3010-5 Transient Response
0.2
0.1
V
OUT
100μV/DIV
C
OUT
= 50mA
I
L
= 1μF
1ms/DIV
30105 G25
0
–0.1
DEVIATION (V)
OUTPUT VOLTAGE
–0.2
50
25
0
LOAD CURRENT (mA)
0
200 400 600 1000
VIN = 6V
= 1μF CERAMIC
C
IN
= 1μF CERAMIC
C
OUT
= 1mA TO 50mA
ΔI
LOAD
TIME (μs)
800
30105 G26
30105 G24
30105fc
7
LT3010/LT3010-5
PIN FUNCTIONS
OUT (Pin 1): Output. The output supplies power to the load. A minimum output capacitor of 1μF is required to prevent oscillations. Larger output capacitors will be required for applications with large transient loads to limit peak volt­age transients. See the Applications Information section for more information on output capacitance and reverse output characteristics.
SENSE (Pin 2): Sense. For the LT3010-5, the SENSE pin is the input to the error amplifi er. Optimum regulation will be obtained at the point where the SENSE pin is connected to the OUT pin of the regulator. In critical applications, small voltage drops are caused by the resistance (R
) of
P
PC traces between the regulator and the load. These may be eliminated by connecting the SENSE pin to the output at the load as shown in Figure 1 (Kelvin Sense Connec­tion). Note that the voltage drop across the external PC traces will add to the dropout voltage of the regulator. The SENSE pin bias current is 10μA at the nominal rated output voltage.
ADJ (Pin 2): Adjust. For the adjustable LT3010, this is the input to the error amplifi er. This pin is internally clamped to ±7V. It has a bias current of 50nA which fl ows into the pin (see curve of ADJ Pin Bias Current vs Temperature
R
P
GND
OUT
SENSE
4, 9
1
2
LOAD
30105 F01
8
IN
LT3010
5
+ +
V
IN
Figure 1. Kelvin Sense Connection
SHDN
in the Typical Performance Characteristics). The ADJ pin voltage is 1.275V referenced to ground, and the output voltage range is 1.275V to 60V.
NC (Pins 3, 6, 7): No Connection. May be fl oated, tied to IN or tied to GND.
GND (Pin 4, Pin 9): Ground. The exposed backside (pin 9) of the package is an electrical connection for GND. As such, to ensure optimum device operation, pin 9 must be connected directly to pin 4 on the PC board.
SHDN (Pin 5): Shutdown. The SHDN
pin is used to put the LT3010 into a low power shutdown state. The output will be off when the SHDN pin is pulled low. The SHDN pin can be driven either by 5V logic or open-collector logic with a pull-up resistor. The pull-up resistor is only required to supply the pull-up current of the open-collector gate, normally several microamperes. If unused, the SHDN pin must be tied to a logic high or V
IN
.
IN (Pin 8): Input. Power is supplied to the device through the IN pin. A bypass capacitor is required on this pin if the device is more than six inches away from the main input fi lter capacitor. In general, the output impedance of a battery rises with frequency, so it is advisable to include a bypass capacitor in battery-powered circuits. A bypass capacitor in the range of 1μF to 10μF is suffi cient. The LT3010 is designed to withstand reverse voltages on the IN pin with respect to ground and the OUT pin. In the case of a reversed input, which can happen if a battery is plugged in backwards, the LT3010 will act as if there is a diode in series with its input. There will be no reverse current fl ow into the LT3010 and no reverse voltage will appear at the load. The device will protect both itself and the load.
8
30105fc
APPLICATIONS INFORMATION
LT3010/LT3010-5
The LT3010 is a 50mA high voltage low dropout regulator with micropower quiescent current and shutdown. The device is capable of supplying 50mA at a dropout voltage of 300mV. The low operating quiescent current (30μA) drops to 1μA in shutdown. In addition to the low quies­cent current, the LT3010 incorporates several protection features which make it ideal for use in battery-powered systems. The device is protected against both reverse input and reverse output voltages. In battery backup ap­plications where the output can be held up by a backup battery when the input is pulled to ground, the LT3010 acts like it has a diode in series with its output and prevents reverse current fl ow.
Adjustable Operation
The adjustable version of the LT3010 has an output voltage range of 1.275V to 60V. The output voltage is set by the ratio of two external resistors as shown in Figure 2. The device servos the output to maintain the voltage at the adjust pin at 1.275V referenced to ground. The current in R1 is then equal to 1.275V/R1 and the current in R2 is the current in R1 plus the ADJ pin bias current. The ADJ pin bias current, 50nA at 25°C, fl ows through R2 into the ADJ pin. The output voltage can be calculated using the formula in Figure 2. The value of R1 should be less than 250k to minimize errors in the output voltage caused by the ADJ pin bias current. Note that in shutdown the output is turned off and the divider current will be zero.
A small capacitor (C1) placed in parallel with the top resistor (R2) of the output divider is necessary for stability and tran­sient performance of the adjustable LT3010. The impedance of C1 at 10kHz should be less than the value of R1.
IN
OUT
LT3010
V
IN
V
V I OUTPUT RANGE = 1.275V TO 60V
Figure 2. Adjustable Operation
GND
= 1.275V
OUT
= 1.275V
ADJ
= 50nA AT 25°C
ADJ
ADJ
R2 C1
R1
R2
+ (I
)(R2)1 +
()
ADJ
R1
V
OUT
+
30105 F02
The adjustable device is tested and specifi ed with the ADJ pin tied to the OUT pin and a 5μA DC load (unless otherwise specifi ed) for an output voltage of 1.275V. Speci­fi cations for output voltages greater than 1.275V will be proportional to the ratio of the desired output voltage to
1.275V; (V
/1.275V). For example, load regulation for an
OUT
output current change of 1mA to 50mA is –10mV typical at V
= 1.275V. At V
OUT
= 12V, load regulation is:
OUT
(12V/1.275V) • (–10mV) = –94mV
Output Capacitance and Transient Response
The LT3010 is designed to be stable with a wide range of output capacitors. The ESR of the output capacitor affects stability, most notably with small capacitors. A minimum output capacitor of 1μF with an ESR of 3Ω or less is recommended to prevent oscillations. The LT3010 is a micropower device and output transient response will be a function of output capacitance. Larger values of output capacitance decrease the peak deviations and provide improved transient response for larger load current changes. Bypass capacitors, used to decouple individual components powered by the LT3010, will increase the effective output capacitor value.
Extra consideration must be given to the use of ceramic capacitors. Ceramic capacitors are manufactured with a variety of dielectrics, each with different behavior across temperature and applied voltage. The most common dielectrics used are specifi ed with EIA temperature char­acteristic codes of Z5U, Y5V, X5R and X7R. The Z5U and Y5V dielectrics are good for providing high capacitances in a small package, but they tend to have strong voltage and temperature coeffi cients as shown in Figures 3 and 4. When used with a 5V regulator, a 16V 10μF Y5V capacitor can exhibit an effective value as low as 1μF to 2μF for the DC bias voltage applied and over the operating tempera­ture range. The X5R and X7R dielectrics result in more stable characteristics and are more suitable for use as the output capacitor. The X7R type has better stability across temperature, while the X5R is less expensive and is avail­able in higher values. Care still must be exercised when using X5R and X7R capacitors; the X5R and X7R codes only specify operating temperature range and maximum
30105fc
9
LT3010/LT3010-5
APPLICATIONS INFORMATION
20
0
–20
–40
–60
CHANGE IN VALUE (%)
–80
–100
04 8102 6 12 14
Figure 3. Ceramic Capacitor DC Bias Characteristics
40
20
0
–20
–40
–60
CHANGE IN VALUE (%)
–80
BOTH CAPACITORS ARE 16V, 1210 CASE SIZE, 10μF
–100
Figure 4. Ceramic Capacitor Temperature Characteristics
–25 0 50 100 125
–50
BOTH CAPACITORS ARE 16V, 1210 CASE SIZE, 10μF
X5R
Y5V
DC BIAS VOLTAGE (V)
X5R
Y5V
25 75
TEMPERATURE (°C)
16
30105 F03
30105 F04
capacitance change over temperature. Capacitance change due to DC bias with X5R and X7R capacitors is better than Y5V and Z5U capacitors, but can still be signifi cant enough to drop capacitor values below appropriate levels. Capaci­tor DC bias characteristics tend to improve as component case size increases, but expected capacitance at operating voltage should be verifi ed.
Voltage and temperature coeffi cients are not the only sources of problems. Some ceramic capacitors have a piezoelectric response. A piezoelectric device generates voltage across its terminals due to mechanical stress, simi­lar to the way a piezoelectric accelerometer or microphone works. For a ceramic capacitor the stress can be induced by vibrations in the system or thermal transients.
Thermal Considerations
The power handling capability of the device will be lim­ited by the maximum rated junction temperature (125°C, LT3010E or 140°C, LT3010H). The power dissipated by the device will be made up of two components:
1. Output current multiplied by the input/output voltage
differential: I
OUT
IN
– V
OUT
) and,
• (V
2. GND pin current multiplied by the input voltage:
• V
I
GND
IN
The GND pin current can be found by examining the GND Pin Current curves in the Typical Performance Character­istics. Power dissipation will be equal to the sum of the two components listed above.
The LT3010 series regulators have internal thermal limiting designed to protect the device during overload condi­tions. For continuous normal conditions the maximum junction temperature rating of 125°C (LT3010E) or 140°C (LT3010H) must not be exceeded. It is important to give careful consideration to all sources of thermal resistance from junction to ambient. Additional heat sources mounted nearby must also be considered.
For surface mount devices, heat sinking is accomplished by using the heat spreading capabilities of the PC board and its copper traces. Copper board stiffeners and plated through-holes can also be used to spread the heat gener­ated by power devices.
The following table lists thermal resistance for several different board sizes and copper areas. All measurements were taken in still air on 3/32" FR-4 board with one ounce copper.
Table 1. Measured Thermal Resistance
COPPER AREA
BOARD AREA
2500 sq mm 2500 sq mm 2500 sq mm 40°C/W 1000 sq mm 2500 sq mm 2500 sq mm 45°C/W
225 sq mm 2500 sq mm 2500 sq mm 50°C/W 100 sq mm 2500 sq mm 2500 sq mm 62°C/W
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)TOPSIDE BACKSIDE
The thermal resistance junction-to-case (θJC), measured at the exposed pad on the back of the die, is 16°C/W.
10
30105fc
APPLICATIONS INFORMATION
LT3010/LT3010-5
Continuous operation at large input/output voltage dif­ferentials and maximum load current is not practical due to thermal limitations. Transient operation at high input/output differentials is possible. The approximate thermal time constant for a 2500sq mm 3/32" FR-4 board with maximum topside and backside area for one ounce copper is 3 seconds. This time constant will increase as more thermal mass is added (i.e. vias, larger board, and other components).
For an application with transient high power peaks, average power dissipation can be used for junction temperature calculations as long as the pulse period is signifi cantly less than the thermal time constant of the device and board.
Calculating Junction Temperature
Example 1: Given an output voltage of 5V, an input volt­age range of 24V to 30V, an output current range of 0mA to 50mA, and a maximum ambient temperature of 50°C, what will the maximum junction temperature be?
The power dissipated by the device will be equal to: I
OUT(MAX)
• (V
IN(MAX)
– V
OUT
) + (I
GND
• V
IN(MAX)
) where: I
OUT(MAX)
= 50mA
Example 2: Given an output voltage of 5V, an input voltage of 48V that rises to 72V for 5ms(max) out of every 100ms, and a 5mA load that steps to 50mA for 50ms out of every 250ms, what is the junction temperature rise above ambi­ent? Using a 500ms period (well under the time constant of the board), power dissipation is as follows:
P1(48V in, 5mA load) = 5mA • (48V – 5V) + (200μA • 48V) = 0.23W
P2(48V in, 50mA load) = 50mA • (48V – 5V) + (1mA • 48V) = 2.20W
P3(72V in, 5mA load) = 5mA • (72V – 5V) + (200μA • 72V) = 0.35W
P4(72V in, 50mA load) = 50mA • (72V – 5V) + (1mA • 72V) = 3.42W
Operation at the different power levels is as follows: 76% operation at P1, 19% for P2, 4% for P3, and
1% for P4.
= 76%(0.23W) + 19%(2.20W) + 4%(0.35W)
P
EFF
+ 1%(3.42W) = 0.64W With a thermal resistance in the range of 40°C/W to
62°C/W, this translates to a junction temperature rise above ambient of 26°C to 38°C.
at (I
= 30V
= 50mA, VIN = 30V) = 1mA
OUT
V
IN(MAX)
I
GND
So: P = 50mA • (30V – 5V) + (1mA • 30V) = 1.28W The thermal resistance will be in the range of 40°C/W to
62°C/W depending on the copper area. So the junction temperature rise above ambient will be approximately equal to:
1.31W • 50°C/W = 65.5°C The maximum junction temperature will then be equal to
the maximum junction temperature rise above ambient plus the maximum ambient temperature or:
T
= 50°C + 65.5°C = 115.5°C
JMAX
High Temperature Operation
Care must be taken when designing LT3010/LT3010-5 applications to operate at high ambient temperatures. The LT3010/LT3010-5 works at elevated temperatures but erratic operation can occur due to unforeseen varia­tions in external components. Some tantalum capacitors are available for high temperature operation, but ESR is often several ohms; capacitor ESR above 3Ω is unsuit­able for use with the LT3010/LT3010-5. Ceramic capacitor manufacturers (Murata, AVX, TDK, and Vishay Vitramon at this writing) now offer ceramic capacitors that are rated to 150°C using an X8R dielectric. Device instability will occur if output capacitor value and ESR are outside design limits at elevated temperature and operating DC voltage bias (see information on capacitor characteristics under
30105fc
11
LT3010/LT3010-5
APPLICATIONS INFORMATION
Output Capacitance and Transient Response). Check each passive component for absolute value and voltage ratings over the operating temperature range.
Leakages in capacitors or from solder fl ux left after insuffi ­cient board cleaning adversely affects low quiescent current operation. Consider junction temperature increase due to power dissipation in both the junction and nearby compo­nents to ensure maximum specifi cations are not violated for the LT3010/LT3010H or external components.
Protection Features
The LT3010 incorporates several protection features which make it ideal for use in battery-powered circuits. In ad­dition to the normal protection features associated with monolithic regulators, such as current limiting and thermal limiting, the device is protected against reverse-input volt­ages, and reverse voltages from output to input.
Current limit protection and thermal overload protection are intended to protect the device against current overload conditions at the output of the device. For normal opera­tion, the junction temperature should not exceed 125°C (LT3010E) or 140°C (LT3010H).
The input of the device will withstand reverse voltages of 80V. Current fl ow into the device will be limited to less than 6mA (typically less than 100μA) and no negative voltage will appear at the output. The device will protect both itself and the load. This provides protection against batteries which can be plugged in backward.
The ADJ pin of the adjustable device can be pulled above or below ground by as much as 7V without damaging the device. If the input is left open circuit or grounded, the ADJ pin will act like an open circuit when pulled below ground, and like a large resistor (typically 100k) in series with a diode when pulled above ground. If the input is powered by a voltage source, pulling the ADJ pin below the reference voltage will cause the device to try and force the current limit current out of the output. This will cause the output to go to a unregulated high voltage. Pulling the ADJ pin above the reference voltage will turn off all output current.
In situations where the ADJ pin is connected to a resistor divider that would pull the ADJ pin above its 7V clamp volt­age if the output is pulled high, the ADJ pin input current must be limited to less than 5mA. For example, a resistor divider is used to provide a regulated 1.5V output from the
1.22V reference when the output is forced to 60V. The top resistor of the resistor divider must be chosen to limit the current into the ADJ pin to less than 5mA when the ADJ pin is at 7V. The 53V difference between the OUT and ADJ pins divided by the 5mA maximum current into the ADJ pin yields a minimum top resistor value of 10.6k.
In circuits where a backup battery is required, several different input/output conditions can occur. The output voltage may be held up while the input is either pulled to ground, pulled to some intermediate voltage, or is left open circuit. Current fl ow back into the output will follow the curve shown in Figure 5. The rise in reverse output current above 7V occurs from the breakdown of the 7V clamp on the ADJ pin. With a resistor divider on the regulator output, this current will be reduced depending on the size of the resistor divider.
When the IN pin of the LT3010 is forced below the OUT pin or the OUT pin is pulled above the IN pin, input cur­rent will typically drop to less than 2μA. This can happen if the input of the LT3010 is connected to a discharged (low voltage) battery and the output is held up by either a backup battery or a second regulator circuit. The state of the SHDN pin will have no effect on the reverse output current when the output is pulled above the input.
100
TA = 25°C
90
= 0V
V
IN
CURRENT FLOWS
80
INTO OUTPUT PIN
= V
V
70
OUT
V
OUT
60
(LT3010-5)
50
40
30
20
REVERSE OUTPUT CURRENT (μA)
10
0
01234567 8910
(LT3010)
ADJ
= V
SENSE
LT3010
LT3010-5
OUTPUT VOLTAGE (V)
ADJ
PIN CLAMP
(SEE ABOVE)
30105 F05
12
Figure 5. Reverse Output Current
30105fc
TYPICAL APPLICATIONS
5V Buck Converter with Low Current Keep Alive Backup
LT3010/LT3010-5
D2
D1N914
V
IN
5.5V* TO 60V
OPERATING
CURRENT
HIGH
LOW
C3
4.7μF 100V CERAMIC
6
BOOST
4
V
IN
15
SHDN
14
SYNC
GND
1, 8, 9, 16
8
5
SHDN
LT1766
LT3010-5
GND
4
SW
BIAS
V
C
OUTIN
SENSE
FB
11
C 1nF
C2
0.33μF
2
D1 10MQ060N
10
12
C
1
2
L1
15μH
R1
15.4k
R2
4.99k
*
FOR INPUT VOLTAGES BELOW 7.5V, SOME RESTRICTIONS MAY APPLY
INCREASE L1 TO 30μH FOR LOAD CURRENTS ABOVE 0.6A AND TO 60μH ABOVE 1A
+
C1 100μF 10V SOLID TANTALUM
30105 TA03
V
OUT
5V 1A/50mA
Buck Converter
Effi ciency vs Load Current
100
90
80
= 5V
V
OUT
L = 68μH
VIN = 10V
VIN = 42V
70
EFFICIENCY (%)
60
50
0
0.25 0.50 0.75 LOAD CURRENT (A)
1.00
1.25
30105 TA04
30105fc
13
LT3010/LT3010-5
TYPICAL APPLICATIONS
LT3010 Automotive Application
V
IN
12V
(LATER 42V)
OFF
ON
V
OFF
48V
ON
(72V TRANSIENT)
OUTIN
LT3010-5
SENSE
GND
+
1μF
NO PROTECTION
DIODE NEEDED!
SHDN
LT3010 Telecom Application
IN
1μF
SHDN
LT3010-5
GND
OUTIN
SENSE
NO PROTECTION
DIODE NEEDED!
1μF
Constant Brightness for Indicator LED over Wide Input Voltage Range
1μF
LOAD: CLOCK,
SECURITY SYSTEM
SYSTEM MONITOR
ETC
LOAD:
ETC
30105 TA05
+
BACKUP BATTERY
RETURN
1μF
OFF ON
–48V
I
= 1.275V/R
LED
–48V CAN VARY FROM –4V TO –80V
SET
IN
LT3010
SHDN
GND
OUT
ADJ
R
SET
30105 TA06
1μF
14
30105fc
PACKAGE DESCRIPTION
2.794 ± 0.102 (.110 ± .004)
MS8E Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1662)
EXPOSED PAD OPTION
0.889 ± 0.127 (.035 ± .005)
BOTTOM VIEW OF
1
LT3010/LT3010-5
2.06 ± 0.102 (.081 ± .004)
1.83 ± 0.102
(.072 ± .004)
5.23
(.206)
MIN
0.42 ± 0.038
(.0165 ± .0015)
TYP
RECOMMENDED SOLDER PAD LAYOUT
0.254 (.010)
GAUGE PLANE
0.18
(.007)
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
2.083 ± 0.102
(.082 ± .004)
0.65
(.0256)
BSC
DETAIL “A”
0° – 6° TYP
DETAIL “A”
3.20 – 3.45
(.126 – .136)
0.53 ± 0.152
(.021 ± .006)
SEATING
PLANE
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
4.90 ± 0.152 (.193 ± .006)
(.043)
0.22 – 0.38
(.009 – .015)
TYP
1.10
MAX
8
8
12
0.65
(.0256)
BSC
7
0.52
5
4
(.0205)
REF
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
0.86
(.034)
REF
0.1016 ± 0.0508 (.004 ± .002)
MSOP (MS8E) 0307 REV D
6
3
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa­tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
30105fc
15
LT3010/LT3010-5
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
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LT1120/LT1120A 125mA, Micropower Regulator and Comparator VIN: 4.5V to 36V, V
LT1121/
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LT1121HV LT1129 700mA, Micropower, LDO VIN: 4.2V to 30V, V
LT1616 25V, 500mA (I
), 1.4MHz, High Effi ciency
OUT
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LT1676 60V, 440mA (I
), 100kHz, High Effi ciency
OUT
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LT1761 100mA, Low Noise Micropower, LDO VIN: 1.8V to 20V, V
LT1762 150mA, Low Noise Micropower, LDO V
LT1763 500mA, Low Noise Micropower, LDO V
LT1764/LT1764A 3A, Low Noise, Fast Transient Response, LDO V
LT1766 60V, 1.2A (I
), 200kHz, High Effi ciency
OUT
Step-Down DC/DC Converter
LT1776 40V, 550mA (I
), 200kHz, High Effi ciency
OUT
Step-Down DC/DC Converter
LT1934/ LT1934-1
LT1956 60V, 1.2A (I
300mA/60mA, (I
), Constant Off-Time, High
OUT
Effi ciency Step-Down DC/DC Converter
), 500kHz, High Effi ciency
OUT
Step-Down DC/DC Converter
LT1962 300mA, Low Noise Micropower, LDO VIN: 1.8V to 20V, V
LT1963/LT1963A 1.5A, Low Noise, Fast Transient Response, LDO V
LT1964 200mA, Low Noise Micropower, Negative LDO VIN: –1.9V to –20V, V
ThinSOT is a trademark of Linear Technology Corporation.
: 4.5V to 36V, V
IN
OUT
Reference, Class B Outputs, S16, PDIP14 Packages
Reference, Logic Shutdown, Ref Sources and Sinks 2/4mA, S8, N8 Packages
OUT
Battery Protection, SOT-223, S8, Z Packages
TO220-5, TSSOP20 Packages
OUT
VIN: 3.6V to 25V, V
VIN: 7.4V to 60V, V
Low Noise < 20μV
: 1.8V to 20V, V
IN
Low Noise < 20μV
: 1.8V to 20V, V
IN
Low Noise < 20μV
: 2.7V to 20V, V
IN
Low Noise < 40μV
OUT
OUT
OUT
RMS
OUT
RMS
OUT
RMS
OUT
RMS
DD, TO220-5 Packages VIN: 5.5V to 60V, V
VIN: 7.4V to 40V, V
OUT
OUT
90% Effi ciency, VIN: 3.2V to 34V, V ThinSOT Package
VIN: 5.5V to 60V, V
Low Noise < 20μV
: 2.1V to 20V, V
IN
Low Noise < 40μV
OUT
OUT
RMS
OUT
RMS
DD, TO220-5, S0T-223, S8 Packages
Low Noise < 30μV
RMS
= 2.5V, VDO = 0.4V, IQ = 40μA, ISD = 40μA, Comparator and
= 2.5V, VDO = 0.4V, IQ = 40μA, ISD = 10μA, Comparator and
= 3.75V, VDO = 0.42V, IQ = 30μA, ISD = 16μA, Reverse
OUT
= 3.75V, VDO = 0.4V, IQ = 50μA, ISD = 16μA, DD, S0T-223, S8,
= 1.25V, IQ = 1.9mA, ISD = <1μA, ThinSOT™ Package
= 1.24V, IQ = 3.2mA, ISD = 2.5μA, S8 Package
= 1.22V, VDO = 0.3V, IQ = 20μA, ISD = <1μA,
, Stable with 1μF Ceramic Capacitors, ThinSOT Package
= 1.22V, VDO = 0.3V, IQ = 25μA, ISD = <1μA,
, MS8 Package
= 1.22V, VDO = 0.3V, IQ = 30μA, ISD = <1μA,
, S8 Package
= 1.21V, VDO = 0.34V, IQ = 1mA, ISD = <1μA,
, “A” Version Stable with Ceramic Capacitors,
= 1.20V, IQ = 2.5mA, ISD = 25μA, TSSOP16/E Package
= 1.24V, IQ = 3.2mA, ISD = 30μA, N8, S8 Packages
= 1.25V, IQ = 14μA, ISD = <1μA,
OUT
= 1.20V, IQ = 2.5mA, ISD = 25μA, TSSOP16/E Package
= 1.22V, VDO = 0.27V, IQ = 30μA, ISD = <1μA,
, MS8 Package
= 1.21V, VDO = 0.34V, IQ = 1mA, ISD = <1μA,
, “A” Version Stable with Ceramic Capacitors,
= –1.21V, VDO = 0.34V, IQ = 30μA, ISD = 3μA,
OUT
, Stable with Ceramic Capacitors, ThinSOT Package
16
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
www.linear.com
30105fc
LT 0208 REV C • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2003
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