LINER LT3060IDC 45v vin, micropower, low noise, 100ma low dropout, linear regulator Datasheet

LT3060
45V VIN , Micropower,
Low Noise, 100mA Low
Dropout, Linear Regulator
DESCRIPTION
FEATURES
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Input Voltage Range: 1.6V to 45V
Output Current: 100mA
Quiescent Current: 40μA
Dropout Voltage: 300mV
Low Noise: 30μVRMS (10Hz to 100kHz)
Adjustable Output: VREF = 600mV
Output Tolerance: ±2% Over Line, Load and
Temperature
Single Capacitor Soft-Starts Reference and Lowers
Output Noise
Shutdown Current: < 1μA
Reverse Battery Protection
Current Limit Foldback Protection
Thermal Limit Protection
8-Lead 2mm × 2mm × 0.75mm DFN and 8-Lead
ThinSOT ™ Packages
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The LT3060 optimizes stability and transient response
with low ESR, ceramic output capacitors. The regulator
does not require the addition of ESR as is common with
other regulators. The LT3060 typically provides 0.1% line
regulation and 0.03% load regulation.
Internal protection circuitry includes reverse-battery
protection, reverse-output protection, reverse-current
protection, current limit with foldback and thermal shutdown.
The LT3060 is an adjustable voltage regulator with an output
voltage range from the 600mV reference to 44.5V. The
LT3060 is offered in the thermally enhanced 8-lead TSOT-23
and 8-lead (2mm × 2mm × 0.75mm) DFN packages.
APPLICATIONS
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The LT®3060 is a micropower, low dropout voltage (LDO)
linear regulator that operates over a 1.6V to 45V input
supply range. The device supplies 100mA of output current
with a typical dropout voltage of 300mV. A single external
capacitor provides programmable low noise reference
performance and output soft-start functionality. The
LT3060’s quiescent current is merely 40μA and provides
fast transient response with a minimum 2.2μF output
capacitor. In shutdown, quiescent current is less than 1μA
and the reference soft-start capacitor is reset.
Battery-Powered Systems
Automotive Power Supplies
Industrial Power Supplies
Avionic Power Supplies
Portable Instruments
L, LT, LTC, LTM, Linear Technology and the Linear logo 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.
TYPICAL APPLICATION
Dropout Voltage
350
1.8V Low Noise Regulator
VIN
2.3V TO
45V
1μF
VOUT
1.8V AT 100mA
30μVRMS NOISE
OUT
249k
1%
LT3060
SHDN
CFF
10nF
10μF
ADJ
GND REF/BYP
124k
1%
10nF
DROPOUT VOLTAGE (mV)
IN
TJ = 25°C
300
250
200
150
100
50
3060 TA01
0
0
10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
3060 TA02
3060f
1
LT3060
ABSOLUTE MAXIMUM RATINGS
(Note 1)
IN Pin Voltage ........................................................ ±50V
OUT Pin Voltage ..................................................... ±50V
Input-to-Output Differential Voltage (Note 2) ......... ±50V
ADJ Pin Voltage ..................................................... ±50V
SHDN Pin Voltage .................................................. ±50V
REF/BYP Pin Voltage ....................................... – 0.3V, 1V
Output Short-Circuit Duration .......................... Indeﬁnite
Operating Junction Temperature (Notes 3, 5, 13)
LT3060E, LT3060I ..............................– 40°C to 125°C
LT3060MPTS8.................................... –55°C to 125°C
LT3060HTS8 ...................................... –40°C to 150°C
Storage Temperature Range...................– 65°C to 150°C
Lead Temperature (TS8 Soldering, 10 sec) ........... 300°C
PIN CONFIGURATION
TOP VIEW
ADJ 2
OUT 3
TOP VIEW
8 GND
REF/BYP 1
9
GND
OUT 4
SHDN 1
GND 2
GND 3
GND 4
7 SHDN
6 IN
5 IN
8 REF/BYP
7 ADJ
6 OUT
5 IN
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
DC PACKAGE
8-LEAD (2mm s 2mm) PLASTIC DFN
TJMAX = 125°C, θJA = 48°C/W TO 60°C/W*, θJC = 20°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
TJMAX = 150°C, θJA = 57°C/W TO 67°C/W*, θJC = 25°C/W
* SEE APPLICATIONS INFORMATION SECTION
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3060EDC#PBF
LT3060EDC#TRPBF
LDTD
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060IDC#PBF
LT3060IDC#TRPBF
LDTD
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060ETS8#PBF
LT3060ETS8#TRPBF
LTDTF
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060ITS8#PBF
LT3060ITS8#TRPBF
LTDTF
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060MPTS8#PBF
LT3060MPTS8#TRPBF
LTDTF
8-Lead Plastic ThinSOT
–55°C to 125°C
LT3060HTS8#PBF
LT3060HTS8#TRPBF
LTDTF
8-Lead Plastic ThinSOT
–40°C to 150°C
LEAD BASED FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3060EDC
LT3060EDC#TR
LDTD
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060IDC
LT3060IDC#TR
LDTD
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060ETS8
LT3060ETS8#TR
LTDTF
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060ITS8
LT3060ITS8#TR
LTDTF
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060MPTS8
LT3060MPTS8#TR
LTDTF
8-Lead Plastic ThinSOT
–55°C to 125°C
LT3060HTS8
LT3060HTS8#TR
LTDTF
8-Lead Plastic ThinSOT
–40°C to 150°C
Consult LTC Marketing for parts speciﬁed with wider operating temperature ranges. *The temperature grade is identiﬁed by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel speciﬁcations, go to: http://www.linear.com/tapeandreel/
3060f
2
LT3060
ELECTRICAL CHARACTERISTICS
The l denotes the speciﬁcations which apply over the full operating
temperature range, otherwise speciﬁcations are at TA = 25°C. (Note 3)
PARAMETER
Minimum Input Voltage (Notes 4, 12)
ADJ Pin Voltage (Notes 4, 5)
CONDITIONS
ILOAD = 100mA
VIN = 2.1V, ILOAD = 1mA
2.1V < VIN < 45V, 1mA < ILOAD < 100mA (E, I, MP Grade)
2.1V < VIN < 45V, 1mA < ILOAD < 100mA (H Grade)
Line Regulation (Note 4)
ΔVIN = 2.1V to 45V, ILOAD = 1mA
(E, I, MP Grade)
VIN = 2.1V, ILOAD = 1mA to 100mA
VIN = 2.1V, ILOAD = 1mA to 100mA
(H Grade)
ILOAD = 1mA
ILOAD = 1mA
ILOAD = 10mA
ILOAD = 10mA
ILOAD = 50mA (Note 14)
ILOAD = 50mA (Note 14)
ILOAD = 100mA (Note 14)
ILOAD = 100mA (Note 14)
ILOAD = 0μA
ILOAD = 1mA
ILOAD = 10mA
ILOAD = 50mA
ILOAD = 100mA
VIN = 45V, VSHDN = 0V
VIN = 2.1V
COUT = 10μF, ILOAD = 100mA, CBYP = 0.01μF
VOUT = 600mV, BW = 10Hz to 100kHz
VOUT = Off to On
VOUT = On to Off
VSHDN = 0V
VSHDN = 45V
VIN – VOUT = 1.5V (AVG), VRIPPLE = 0.5VP-P,
fRIPPLE = 120Hz, ILOAD = 100mA
VIN = 7V, VOUT = 0
VIN = VOUT(NOMINAL) + 1V (Notes 6, 12), ΔVOUT = –5%
VIN = –45V, VOUT = 0
VOUT = 1.2V, VIN = 0
Load Regulation (Note 4)
Dropout Voltage
VIN = VOUT(NOMINAL)
(Notes 6, 7)
GND Pin Current
VIN = VOUT(NOMINAL) + 0.55V
(Notes 6, 8)
Quiescent Current in Shutdown
ADJ Pin Bias Current (Notes 4, 9)
Output Voltage Noise
Shutdown Threshold
SHDN Pin Current (Note 10)
Ripple Rejection (Note 4)
Current Limit
Input Reverse Leakage Current
Reverse Output Current (Note 11)
MIN
l
l
l
594
588
585
TYP
1.6
600
l
0.6
l
l
0.2
75
l
150
l
240
l
300
l
l
l
l
l
l
40
60
160
0.8
2
0.3
15
30
l
l
l
0.3
0.8
0.7
65
0.9
85
l
l
l
MAX
2.1
606
612
612
3.5
UNITS
V
mV
mV
mV
mV
4
9
110
180
200
300
280
410
350
510
80
100
350
1.8
4
1
60
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
μA
μA
μA
mA
mA
μA
nA
μVRMS
1.5
1
3
200
110
l
0.2
300
10
V
V
μA
μA
dB
mA
mA
μA
μA
3060f
3
LT3060
ELECTRICAL CHARACTERISTICS
The l denotes the speciﬁcations which apply over the full operating
temperature range, otherwise speciﬁcations are at TA = 25°C. (Note 3)
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: Absolute maximum input-to-output differential voltage is not
achievable with all combinations of rated IN pin and OUT pin voltages.
With the IN pin at 50V, the OUT pin may not be pulled below 0V. The total
measured voltage from IN to OUT must not exceed ±50V.
Note 3: The LT3060 is tested and speciﬁed under pulse load conditions
such that TJ ≅ TA . The LT3060E regulator is 100% tested at TA = 25°C.
Performance at –40°C to 125°C is assured by design, characterization
and correlation with statistical process controls. The LT3060I regulator is
guaranteed over the full –40°C to 125°C operating junction temperature
range. The LT3060MP is 100% tested over the –55°C to 125°C operating
junction temperature range. The LT3060H is 100% tested over the
–40°C to 150°C operating junction temperature range. High junction
temperatures degrade operating lifetimes. Operating lifetime is derated at
junction temperatures greater than 125°C.
Note 4: The LT3060 is tested and speciﬁed for these conditions with the
ADJ connected to the OUT pin.
Note 5: 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 the maximum input-to-output voltage differential.
Limit the input-to-output voltage differential if operating at maximum
output current. Current limit foldback will limit the maximum output
current as a function of input-to-output voltage. See Current Limit vs
VIN – VOUT in the Typical Performance Characteristics section.
Note 6: To satisfy minimum input voltage requirements, the LT3060 is
tested and speciﬁed for these conditions with an external resistor divider
(bottom 115k, top 365k) for an output voltage of 2.5V. The external
resistor divider adds 5μA of DC load on the output. The external current is
not factored into GND pin current.
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: (VIN – VDROPOUT). For some output
voltages, minimum input voltage requirements limit dropout voltage.
Note 8: GND pin current is tested with VIN = V(OUT(NOMINAL) + 0.5V and a
current source load. GND pin current will increase in dropout. See GND pin
current curves in the Typical Performance Characteristics section.
Note 9: ADJ pin bias current ﬂows out of the ADJ pin.
Note 10: SHDN pin current ﬂows into the SHDN pin.
Note 11: 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 12: To satisfy requirements for minimum input voltage, current limit
is tested at VIN = VOUT(NOMINAL) + 1V or VIN = 2.1V, whichever is greater.
Note 13: This IC includes overtemperature protection that protects the
device during momentary overload conditions. Junction temperature
will exceed 125°C (LT3060E, LT3060I, LT3060MP) or 150°C (LT3060H)
when overtemperature circuitry is active. Continuous operation above the
speciﬁed maximum junction temperature may impair device reliability.
Note 14: The dropout voltage speciﬁcation is guaranteed for the DFN
package. The dropout voltage speciﬁcation for high output currents cannot
be guaranteed for the TS8 package due to production test limitations.
3060f
4
LT3060
TYPICAL PERFORMANCE CHARACTERISTICS
Typical Dropout Voltage
400
TJ = 125°C
300
250
TJ = 25°C
150
100
50
= TEST POINTS
500
500
450
350
300
TJ ≤ 25°C
250
200
150
0
Quiescent Current
2.5V Quiescent Current
60
0.606
30
20
200
0.604
0.602
0.600
0.598
0.596
0.594
0.592
10
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
100
75
VSHDN = VIN
50
0
2.50
TJ = 25°C
RL = 120k
VOUT = 0.6V
VSHDN = VIN
30
20
2.00
1.75
1.50
1.25
1.00
RL = 50Ω
IL = 50mA*
0.75
RL = 2.5k
IL = 1mA*
0.25
2.00
1.75
5
10
15 20 25 30 35
INPUT VOLTAGE (V)
40
45
3060 G07
45
RL = 6Ω
IL = 100mA*
1.50
1.25
1.00
RL = 12Ω
IL = 50mA*
0.75
0.50
RL = 250Ω
IL = 10mA*
RL = 600Ω
IL = 1mA*
0.25
RL = 60Ω
IL = 10mA*
0
0
0
40
TJ = 25°C
*FOR VOUT = 0.6V
VSHDN = VIN
2.25
VSHDN = 0
0
15 20 25 30 35
INPUT VOLTAGE (V)
0.6V GND Pin Current
RL = 25Ω
IL = 100mA*
0.50
10
10
2.50
TJ = 25°C
*FOR VOUT = 2.5V
VSHDN = VIN
2.25
GND PIN CURRENT (mA)
50
5
3060 G06
2.5V GND Pin Current
60
VSHDN = 0
3060 G05
Quiescent Current
70
125
0
0.588
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3060 G04
80
150
25
0.590
VSHDN = 0V
TJ = 25°C
RL = 500k
VOUT = 2.5V
175
QUIESCENT CURRENT (μA)
VIN = 6V
70 RL = 120k, IL = 5μA
40
IL = 1mA
3060 G03
ADJ Pin Voltage
ADJ PIN VOLTAGE (V)
QUIESCENT CURRENT (μA)
150
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
0.612
I = 1mA
0.610 VL = 2.1V
IN
0.608
VSHDN = VIN
IL = 10mA
200
3060 G02
80
QUIESCENT CURRENT (μA)
250
50
3060 G01
40
300
50
0
IL = 50mA
350
100
10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
50
400
100
0
0
IL = 100mA
450
TJ ≤ 150°C
400
GND PIN CURRENT (mA)
DROPOUT VOLTAGE (mV)
450
550
DROPOUT VOLTAGE (mV)
GUARANTEED DROPOUT VOLTAGE (mV)
500
200
Dropout Voltage
Guaranteed Dropout Voltage
550
550
350
TA = 25°C, unless otherwise noted.
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
3060 G08
0
1
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
3060 G09
3060f
5
LT3060
TYPICAL PERFORMANCE CHARACTERISTICS
SHDN PIN THRESHOLD (V)
GND PIN CURRENT (mA)
3.0
2.5
2.0
1.5
1.0
0.5
0
10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
1.5
1.4
1.3
1.2
1.1
1.0
0.9
OFF TO ON
0.8
0.7
0.6
ON TO OFF
0.5
0.4
0.3
0.2
0.1
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3060 G10
1.4
1.2
1.0
0.8
0.6
0.4
0
0
VSHDN = 45V
ADJ PIN BIAS CURRENT (nA)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
250
40
225
30
200
20
10
0
–10
–20
75
25
0
0
75
50
25 VIN = 7V
VOUT = 0V
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3060 G16
10 15 20 25 30 35 40
INPUT/OUTPUT DIFFERENTIAL (V)
Reverse Output Current
50
TJ = 25°C
1.8 VIN = 0V
CURRENT FLOWS
1.6
INTO OUT PIN
1.4 VOUT = VADJ
45
1.2
1.0
ADJ
0.8
0.6
0.4
0.2
0
5
10
15 20 25 30 35
OUTPUT VOLTAGE (V)
40
45
3060 G17
VIN = 0V
VOUT = VADJ = 1.2V
40
35
30
25
20
15
ADJ
10
5
OUT
0
45
3060 G15
REVERSE OUTPUT CURRENT (μA)
100
5
3060 G14
REVERSE OUTPUT CURRENT (mA)
125
TJ = –50°C
100
Reverse Output Current
150
TJ = 25°C
125
50
2.0
175
45
$VOUT = – 5%
TJ = 125°C
150
–40
Current Limit vs Temperature
40
175
–30
–50
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
250
200
10 15 20 25 30 35
SHDN PIN VOLTAGE (V)
Current Limit vs VIN –VOUT
50
3060 G13
225
5
3060 G12
ADJ Pin Bias Current
0.2
CURRENT LIMIT (mA)
1.6
0.2
CURRENT LIMIT (mA)
SHDN PIN INPUT CURRENT (μA)
1.8
1.8
3060 G11
SHDN Pin Input Current
2.0
2.0
SHDN PIN INPUT CURRENT (μA)
VIN = VOUT(NOMINAL) + 1V
3.5
0
SHDN Pin Input Current
SHDN Pin Threshold
GND Pin Current vs ILOAD
4.0
TA = 25°C, unless otherwise noted.
OUT
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3060 G18
3060f
6
LT3060
TYPICAL PERFORMANCE CHARACTERISTICS
5V Input Ripple Rejection
100
100
VOUT = 0.6V
80
VOUT = 5V
60
COUT = 10μF
50
40
30
I = 100mA
20 L
CREF/BYP = CFF = 0
10 VIN = VOUT(NOMINAL) + 1.5V +
COUT = 2.2μF
50mVRMS RIPPLE
0
10
100
1k
10k 100k 1M
10M
FREQUENCY (Hz)
70
60
50
40
30
IL = 100mA
VOUT = 5V
CREF/BYP = CFF = 0
10 COUT = 10μF
VIN = 6V + 50mVRMS RIPPLE
0
10
100
1k
10k 100k 1M
FREQUENCY (Hz)
Minimum Input Voltage
IL = 100mA
LOAD REGULATION (mV)
IL = 50mA
1.2
1.0
0.8
0.6
0.4
2
1
0
–1
–2
VIN = 2.1V
–3 VOUT = 0.6V
$IL = 1mA TO 100mA
–4
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
VSHDN = VIN
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3060 G22
0.1
CREF/BYP = 10nF
100
CREF/BYP = 1nF
1k
10k
FREQUENCY (Hz)
100k
3060 G25
OUTPUT NOISE SPECTRAL DENSITY (μV/√Hz)
OUTPUT NOISE SPECTRAL DENSITY (μV/√Hz)
CREF/BYP = 100pF
VOUT = 0.6V
10
1
VOUT = 5V
VOUT = 3.3V
VOUT = 2.5V
VOUT = 1.8V
VOUT = 1.5V
VOUT = 1.2V
VOUT = 0.6V
0.1
0.01
100
10
COUT = 10μF
IL = 100mA
10k
1k
FREQUENCY (Hz)
RMS Output Noise vs Load Current
vs CREF/BYP, CFF = 0
10
110
CFF = 0
1
CFF = 10nF
0.1
0.01
100k
3060 G24
Output Noise Spectral Density
vs CFF, CREF/BYP = 10nF
1
0.01
10
3060 G23
Output Noise Spectral Density
vs CREF/BYP, CFF = 0
COUT = 10μF
IL = 100mA
30
3060 G21
OUTPUT NOISE VOLTAGE (μVRMS)
MINIMUM INPUT VOLTAGE (V)
3
VOUT = 5V
40
Output Noise Spectral Density
CREF/BYP = 0, CFF = 0
1.8
10
50
Load Regulation
2.0
0.2
60
20 I = 100mA
L
10 VOUT = 0.6V
VIN = 2.6V + 0.5VP-P RIPPLE AT f = 120Hz
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
10M
4
1.4
70
3060 G20
2.2
1.6
CREF/BYP = 0
80
20
3060 G19
CREF/BYP = 10nF
90
CREF/BYP = 10nF, CFF = 0
80
70
RIPPLE REJECTION (dB)
RIPPLE REJECTION (dB)
CREF/BYP = CFF = 10nF
90
OUTPUT NOISE SPECTRAL DENSITY (μV/√Hz)
90
Ripple Rejection vs Temperature
100
RIPPLE REJECTION (dB)
Input Ripple Rejection
TA = 25°C, unless otherwise noted.
VOUT = 5V
COUT = 10μF
IL = 100mA
10
100
CFF = 1nF
CFF = 100pF
1k
10k
FREQUENCY (Hz)
VOUT = 0.6V
100 COUT = 10μF
90
80
CREF/BYP = 10pF
70
60
CREF/BYP = 100pF
50
40
30
CREF/BYP = 1nF
20
CREF/BYP = 10nF
10
100k
3060 G26
CREF/BYP = 0
0
0.01
CREF/BYP = 100nF
0.1
1
10
LOAD CURRENT (mA)
100
3060 G27
3060f
7
LT3060
TYPICAL PERFORMANCE CHARACTERISTICS
RMS Output Noise
vs Feedforward Capacitor (CFF)
120
110
OUTPUT NOISE VOLTAGE (μVRMS)
OUTPUT NOISE VOLTAGE (μVRMS)
RMS Output Noise vs Load Current
CREF/BYP = 10nF, CFF = 0
170
160 f = 10Hz TO 100kHz
VOUT = 5V
150 COUT = 10μF
140
VOUT = 2.5V
130
VOUT = 3.3V
120
VOUT = 1.8V
110
100
VOUT = 1.5V
90
80
70
60
50
40
VOUT = 1.2V
30
20
VOUT = 0.6V
10
0
0.01
0.1
1
10
100
LOAD CURRENT (mA)
TA = 25°C, unless otherwise noted.
100
90
VOUT = 5V
VOUT = 3.3V
VOUT = 2.5V
80
f = 10Hz TO 100kHz
CREF/BYP = 10nF
COUT = 10μF
IFB-DIVIDER = 5μA
IL = 100mA
70
60
50
40
30
20 VOUT = 1.8V VOUT = 1.2V VOUT = 0.6V
10
VOUT = 1.5V
0
1n
10n
10p
100p
FEEDFORWARD CAPACITOR, CFF (F)
3060 G28
3060 G29
5V 10Hz to 100kHz Output Noise
CREF/BYP = 10nF, CFF = 10nF
5V 10Hz to 100kHz Output Noise
CREF/BYP = 10nF, CFF = 0
VOUT
100μV/DIV
VOUT
100μV/DIV
COUT = 10μF
IL = 100mA
1ms/DIV
3060 G30
COUT = 10μF
IL = 100mA
3060 G31
5V Transient Response
CFF = 10nF
5V Transient Response
CFF = 0
VOUT
50mV/DIV
1ms/DIV
VOUT = 5V
VOUT
20mV/DIV
VOUT = 5V
ΔIOUT = 10mA TO 100mA
ΔIOUT = 10mA TO 100mA
IOUT
50mA/DIV
IOUT
50mA/DIV
VIN = 6V
100μs/DIV
COUT = CIN = 10μF
IFB-DIVIDER = 5μA
3060 G32
VIN = 6V
20μs/DIV
COUT = CIN = 10μF
IFB-DIVIDER = 5μA
3060 G33
3060f
8
LT3060
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, unless otherwise noted.
SHDN Transient Response
CREF/BYP = 0
5V Transient Response
Load Dump
VOUT
2V/DIV
RL = 50Ω
VOUT VOUT = 5V
10mV/DIV
VIN = 12V TO 45V
REF/BYP
500mV/DIV
SHDN
1V/DIV
VIN
10V/DIV
2ms/DIV
COUT = CIN = 2.2μF
CREF/BYP = CFF = 10nF
IFB-DIVIDER = 5μA
3060 G34
COUT = CIN = 2.2μF
CFF = 0
SHDN Transient Response
CREF/BYP = 10nF
4ms/DIV
3060 G35
Start-Up Time
vs REF/BYP Capacitor
100
START-UP TIME (ms)
VOUT
2V/DIV
RL = 50Ω
REF/BYP
500mV/DIV
SHDN
1V/DIV
CFF = 0
10
1
0.1
COUT = CIN = 2.2μF
CFF = 0
4ms/DIV
3060 G36
0.01
10p
100p
10n
1n
REF/BYP CAPACITOR (F)
100n
3060 G37
3060f
9
LT3060
PIN FUNCTIONS
(DC8/TS8)
REF/BYP (Pin 1 / Pin 8): Reference/Bypass. Connecting
a single capacitor from this pin to GND bypasses the
LT3060’s reference noise and soft-starts the reference.
A 10nF bypass capacitor typically reduces output voltage
noise to 30μVRMS in a 10Hz to 100kHz bandwidth. Softstart time is directly proportional to the REF/BYP capacitor
value. If the LT3060 is placed in shutdown, REF/BYP is
actively pulled low by an internal device to reset soft-start.
If low noise or soft-start performance is not required, this
pin must be left ﬂoating (unconnected). Do not drive this
pin with any active circuitry.
ADJ (Pin 2 / Pin 7): Adjust. This pin is the error ampliﬁer’s
inverting terminal. It’s typical bias current of 15nA ﬂows out
of the pin (see curve of ADJ Pin Bias Current vs Temperature
in the Typical Performance Characteristics section). The
ADJ pin voltage is 600mV referenced to GND.
OUT (Pins 3, 4 / Pin 6): Output. These pin(s) supply power
to the load. Stability requirements demand a minimum
2.2μF ceramic output capacitor to prevent oscillations.
Large load transient applications require larger output
capacitors to limit peak voltage transients. See the
Applications Information section for details on transient
response and reverse output characteristics. Permissible
output voltage range is 600mV to 44.5V.
IN (Pins 5, 6 / Pin 5): Input. These pin(s) supply power to
the device. The LT3060 requires a local IN bypass capacitor
if it is located more than six inches from the main input
ﬁlter capacitor. In general, battery output impedance rises
with frequency, so adding a bypass capacitor in batterypowered circuits is advisable.
An input bypass capacitor in the range of 1μF to 10μF
sufﬁces. The LT3060 withstands reverse voltages on the
IN pin with respect to its GND and OUT pins. In a reversed
input situation, such as a battery plugged in backwards,
the LT3060 behaves as if a large resistor is in series with
its input. Limited reverse current ﬂows into the LT3060
and no reverse voltage appears at the load. The device
protects itself and the load.
SHDN (Pin 7 / Pin 1): Shutdown. Pulling the SHDN pin
low puts the LT3060 into a low power state and turns
the output off. Drive the SHDN pin with either logic or an
open collector/drain with a pull-up resistor. The resistor
supplies the pull-up current to the open collector/drain
logic, normally several microamperes, and the SHDN
pin current, typically less than 3μA. If unused, connect
the SHDN pin to IN. The LT3060 does not function if the
SHDN pin is not connected. The SHDN pin cannot be
driven below GND unless tied to the IN pin. If the SHDN
pin is driven below GND while IN is powered, the output
may turn on. SHDN pin logic cannot be referenced to a
negative supply voltage.
GND (Pin 8, Exposed Pad Pin 9 / Pins 2, 3, 4): Ground.
Connect the bottom of the external resistor divider that sets
the output voltage directly to GND for optimum regulation.
For the DFN package, tie exposed pad Pin 9 directly to Pin 8
and the PCB ground. This exposed pad provides enhanced
thermal performance with its connection to the PCB ground.
See the Applications Information section for thermal
considerations and calculating junction temperature.
3060f
10
LT3060
APPLICATIONS INFORMATION
The LT3060 is a micropower, low noise, low dropout voltage,
100mA linear regulator with micropower shutdown. The
device supplies up to 100mA at a typical dropout voltage
of 300mV and operates over a 1.6V to 45V input range.
A single external capacitor can provide programmable
low noise reference performance and output soft-start
functionality. For example, connecting a 10nF capacitor
from the REF/BYP pin to GND lowers output noise to
30μVRMS over a 10Hz to 100kHz bandwidth. This capacitor
also soft-starts the reference and prevents output voltage
overshoot at turn-on.
The LT3060’s quiescent current is merely 40μA but provides
fast transient response with a minimum low ESR 2.2μF
ceramic output capacitor. In shutdown, quiescent current
is less than 1μA and the reference soft-start capacitor is
reset.
The LT3060 optimizes stability and transient response
with low ESR, ceramic output capacitors. The regulator
does not require the addition of ESR as is common with
other regulators. The LT3060 typically provides 0.1% line
regulation and 0.03% load regulation.
Internal protection circuitry includes reverse-battery
protection, reverse-output protection, reverse-current
protection, current limit with foldback and thermal
shutdown.
This “bullet-proof” protection set makes it ideal for use in
battery-powered systems. In battery backup applications
where the output is held up by a backup battery and the
input is pulled to ground, the LT3060 acts like it has a
diode in series with its output and prevents reverse current
ﬂow. Additionally, in dual supply applications where the
regulator load is returned to a negative supply, the output
can be pulled below ground by as much as 45V and the
device still starts normally and operates.
Adjustable Operation
The LT3060 has an output voltage range of 0.6V to 44.5V. The
output voltage is set by the ratio of two external resistors,
as shown in Figure 1. The device servos the output to
maintain the ADJ pin voltage at 0.6V referenced to ground.
The current in R1 is then equal to 0.6V/R1, and the current
in R2 is the current in R1 minus the ADJ pin bias current.
IN
VIN
OUT
LT3060
SHDN
VOUT
R2
ADJ
GND REF/BYP
R1
⎛ R2 ⎞
VOUT = 0.6 V ⎜ 1+
– IADJ • R2
R1 ⎟⎠
⎝
(
)
VADJ = 0.6 V
IADJ = 15nA at 25º C
3060 F01
OUTPUT RANGE = 0.6 V to 44.5V
Figure 1. Adjustable Operation
The ADJ pin bias current, 15nA at 25˚C, ﬂows from the
ADJ pin through R1 to GND. Calculate the output voltage
using the formula in Figure 1. The value of R1 should be no
greater than 124k to provide a minimum 5μA load current
so that errors in the output voltage, caused by the ADJ
pin bias current, are minimized. Note that in shutdown,
the output is turned off and the divider current is zero.
Curves of ADJ Pin Voltage vs Temperature and ADJ Pin Bias
Current vs Temperature appear in the Typical Performance
Characteristics Section.
The LT3060 is tested and speciﬁed with the ADJ pin tied
to the OUT pin, yielding VOUT = 0.6V. Speciﬁcations for
output voltages greater than 0.6V are proportional to the
ratio of the desired output voltage to 0.6V: VOUT /0.6V. For
example, load regulation for an output current change
of 1mA to 100mA is 0.2mV (typical) at VOUT = 0.6V. At
VOUT = 12V, load regulation is:
12V
• (0.2mV) = 4mV
0.6 V
Table 1 shows 1% resistor divider values for some common
output voltages with a resistor divider current of 5μA.
Table 1. Output Voltage Resistor Divider Values
VOUT
(V)
R1
(k Ω)
R2
(k Ω)
1.2
118
118
1.5
121
182
1.8
124
249
2.5
115
365
3
124
499
3.3
124
562
5
115
845
3060f
11
LT3060
APPLICATIONS INFORMATION
The LT3060 regulator provides low output voltage noise
over the 10Hz to 100kHz bandwidth while operating at
full load with the addition of a reference bypass capacitor
(CREF/BYP) from the REF/BYP pin to GND. A good quality,
low leakage capacitor is recommended. This capacitor will
bypass the internal reference of the regulator, providing a
low frequency noise pole. With the use of 10nF for CREF/BYP,
the output voltage noise decreases to as low as 30μVRMS
when the output voltage is set for 0.6V. For higher output
voltages (generated by using a feedback resistor divider),
the output voltage noise gains up accordingly when using
CREF/BYP by itself.
Higher values of output voltage noise are often measured
if care is not exercised with regard to circuit layout and
testing. Crosstalk from nearby traces induces unwanted
noise onto the LT3060’s output. Power supply ripple
rejection must also be considered. The LT3060 regulator
does not have unlimited power supply rejection and passes
a small portion of the input noise through to the output.
Using a feedforward capacitor (CFF) from VOUT to the ADJ
pin has the added beneﬁt of improving transient response
for output voltages greater than 0.6V. With no feedforward
capacitor, the settling time will increase as the output
voltage is raised above 0.6V. Use the equation in Figure 2
to determine the minimum value of CFF to achieve a
transient response that is similar to 0.6V output voltage
performance regardless of the chosen output voltage
(See Figure 3 and Transient Response in the Typical Performance Characteristics section).
IN
VIN
OUT
LT3060
SHDN
VOUT
R2
CFF
COUT
ADJ
GND REF/BYP
R1
4.7nF
• IFB−DIVIDER
5μA
V
IFB−DIVIDER = OUT
R1+R 2
CFF ≥
CREF/BYP
3060 F02
(
)
Figure 2. Feedforward Capacitor for Fast Transient Response
VOUT = 5V
COUT = 10μF
IFB-DIVIDER = 5μA
0
VOUT
50mV/DIV
To lower the output voltage noise for higher output voltages,
include a feedforward capacitor (CFF) from VOUT to the ADJ
pin. A good quality, low leakage capacitor is recommended.
This capacitor will bypass the error ampliﬁer of the regulator,
providing a low frequency noise pole. With the use of 10nF
for both CFF and CREF/BYP, output voltage noise decreases
to 30μVRMS when the output voltage is set to 5V by a 5μA
feedback resistor divider. If the current in the feedback
resistor divider is doubled, CFF must also be doubled to
achieve equivalent noise performance.
During start-up, the internal reference will soft-start if a
reference bypass capacitor is present. Regulator startup time is directly proportional to the size of the bypass
capacitor, slowing to 6ms with a 10nF bypass capacitor
(See Start-up Time vs REF/BYP Capacitor in the Typical
Performance Characteristics section). The reference
bypass capacitor is actively drained during shutdown to
reset the internal reference soft-start.
FEEDFORWARD
CAPACITOR, CFF
Bypass Capacitance, Output Voltage Noise and
Transient Response
100pF
1nF
10nF
LOAD CURRENT
100mA/DIV
100μs/DIV
3060 F03
Figure 3. Transient Response vs Feedforward Capacitor
Start-up time is also affected by the presence of a feedforward
capacitor. Start-up time is directly proportional to the size
of the feedforward capacitor and the output voltage, and
is inversely proportional to the feedback resistor divider
current, slowing to 15ms with a 4.7nF feedforward capacitor
and a 10μF output capacitor for an output voltage set to
5V by a 5μA feedback resistor divider.
Output Capacitance
The LT3060 regulator is stable with a wide range of output
capacitors. The ESR of the output capacitor affects stability,
most notably with small capacitors. Use a minimum output
capacitor of 2.2μF with an ESR of 3Ω or less to prevent
oscillations. If a feedforward capacitor is used with output
3060f
12
LT3060
APPLICATIONS INFORMATION
The X7R type works over a wider temperature range and
has better temperature stability, 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 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 signiﬁcant 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 veriﬁed.
Voltage and temperature coefﬁcients 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 is induced by vibrations in
20
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10μF
0
CHANGE IN VALUE (%)
Give extra consideration to the use of ceramic capacitors.
Manufacturers make ceramic capacitors with a variety of
dielectrics, each with different behavior across temperature and applied voltage. The most common dielectrics
are speciﬁed with EIA temperature characteristic codes
of Z5U, Y5V, X5R and X7R. The Z5U and Y5V dielectrics
provide high C-V products in a small package at low cost,
but exhibit strong voltage and temperature coefﬁcients, as
shown in Figures 4 and 5. 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 yield much more stable characteristics and are
more suitable for use as the output capacitor.
the system or thermal transients. The resulting voltages
produced cause appreciable amounts of noise. A ceramic
capacitor produced the trace in Figure 6 in response to light
tapping from a pencil. Similar vibration induced behavior
can masquerade as increased output voltage noise.
X5R
–20
–40
–60
Y5V
–80
–100
0
2
4
14
8
6
10 12
DC BIAS VOLTAGE (V)
16
3060 F04
Figure 4. Ceramic Capacitor DC Bias Characteristics
40
20
CHANGE IN VALUE (%)
voltages set for greater than 24V, use a minimum output
capacitor of 4.7μF. The LT3060 is a micropower device
and output load transient response is 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
LT3060, increase the effective output capacitor value. For
applications with large load current transients, a low ESR
ceramic capacitor in parallel with a bulk tantalum capacitor
often provides an optimally damped response.
X5R
0
–20
–40
Y5V
–60
–80
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10μF
–100
–50 –25
50
25
75
0
TEMPERATURE (°C)
100
125
3060 F05
Figure 5. Ceramic Capacitor Temperature Characteristics
VOUT = 0.6V
COUT = 10μF
CREF/BYP = 10nF
ILOAD = 100mA
VOUT
500μV/DIV
4ms/DIV
3060 F06
Figure 6. Noise Resulting from Tapping on a Ceramic Capacitor
3060f
13
LT3060
APPLICATIONS INFORMATION
Overload Recovery
Like many IC power regulators, the LT3060 has safe
operating area protection. The safe operating area
protection decreases current limit as input-to-output
voltage increases, and keeps the power transistor inside
a safe operating region for all values of input-to-output
voltage. The LT3060 provides some output current at all
values of input-to-output voltage up to the speciﬁed 45V
operational maximum.
When power is ﬁrst applied, the input voltage rises and the
output follows the input; allowing the regulator to start-up
into very heavy loads. During start-up, as the input voltage
is rising, the input-to-output voltage differential is small,
allowing the regulator to supply large output currents.
With a high input voltage, a problem can occur wherein
the removal of an output short will not allow the output
to recover. Other regulators, such as the LT1083/LT1084/
LT1085 family and LT1764A also exhibit this phenomenon,
so it is not unique to the LT3060. The problem occurs
with a heavy output load when the input voltage is high
and the output voltage is low. Common situations are: (1)
immediately after the removal of a short-circuit or (2) if
the shutdown pin is pulled high after the input voltage is
already turned on. The load line intersects the output current
curve at two points creating two stable output operating
points for the regulator. With this double intersection, the
input power supply needs to be cycled down to zero and
brought up again for the output to recover.
Thermal Considerations
The power handling capability of the device will be limited
by the maximum rated junction temperature (125°C for
LT3060E, LT3060I, LT3060MP or 150°C for LT3060H).
Two components comprise the power dissipated by the
device:
1. Output current multiplied by the input/output voltage
differential: IOUT • (VIN –VOUT), and
2. GND pin current multiplied by the input voltage:
IGND • VIN
GND pin current is determined using the GND Pin Current
curves in the Typical Performance Characteristics section.
Power dissipation equals the sum of the two components
listed above.
The LT3060 regulator has internal thermal limiting that
protects the device during overload conditions. For
continuous normal conditions, the maximum junction
temperature of 125°C (E-grade, I-grade, MP-grade) or
150°C (H-grade) must not be exceeded. Carefully consider
all sources of thermal resistance from junction-to-ambient
including other heat sources mounted in proximity to the
LT3060.
The underside of the LT3060 DFN package has exposed
metal (1mm2) from the lead frame to the die attachment.
The package allows heat to directly transfer from the
die junction to the printed circuit board metal to control
maximum operating junction temperature. The dual-in-line
pin arrangement allows metal to extend beyond the ends
of the package on the topside (component side) of a PCB.
Connect this metal to GND on the PCB. The multiple IN
and OUT pins of the LT3060 also assist in spreading heat
to the PCB.
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 also can spread the heat generated by
power devices.
The following tables list thermal resistance for several
different board sizes and copper areas. All measurements
were taken in still air on a 4 layer FR-4 board with 1oz
solid internal planes and 2oz top/bottom external trace
planes with a total board thickness of 1.6mm. The four
layers were electrically isolated with no thermal vias
present. PCB layers, copper weight, board layout and
thermal vias will affect the resultant thermal resistance.
For more information on thermal resistance and high
thermal conductivity test boards, refer to JEDEC standard
JESD51, notably JESD51-12 and JESD51-7. Achieving
low thermal resistance necessitates attention to detail
and careful PCB layout.
3060f
14
LT3060
APPLICATIONS INFORMATION
Table 2. DC Package, 8-Lead DFN
COPPER AREA
TOPSIDE* BACKSIDE
(mm2)
(mm2)
2500
BOARD AREA
(mm2)
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
2500
48°C/W
2500
1000
2500
2500
49°C/W
225
2500
2500
50°C/W
100
2500
2500
54°C/W
50
2500
2500
60°C/W
*Device is mounted on topside
Table 3. TS8 Package, 8 Lead TSOT-23
COPPER AREA
TOPSIDE* BACKSIDE
(mm2)
(mm2)
BOARD AREA
(mm2)
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
2500
2500
2500
57°C/W
1000
2500
2500
58°C/W
225
2500
2500
59°C/W
100
2500
2500
63°C/W
50
2500
2500
67°C/W
*Device is mounted on topside
Calculating Junction Temperature
Example: Given an output voltage of 2.5V, an input voltage range of 12V ±5%, an output current range of 0mA
to 50mA and a maximum ambient temperature of 85°C,
what will the maximum junction temperature be?
The power dissipated by the device equals:
IOUT(MAX) • (VIN(MAX)–VOUT) + IGND • VIN(MAX)
where,
IOUT(MAX) = 50mA
VIN(MAX) = 12.6V
IGND at (IOUT = 50mA, VIN = 12.6V) = 0.6mA
So,
P = 50mA • (12.6V – 2.5V) + 0.6mA • 12.6V = 0.513W
Using a DFN package, the thermal resistance ranges from
48°C/W to 60°C/W depending on the copper area with
no thermal vias. So the junction temperature rise above
ambient approximately equals:
0.513W • 54°C/W = 27.8°C
The maximum junction temperature equals the maximum
ambient temperature plus the maximum junction temperature rise above ambient or:
TJMAX = 85°C + 27.8°C = 112.8°C
Protection Features
The LT3060 incorporates several protection features
that 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 also protects against reverse-input
voltages, reverse-output voltages and reverse output-toinput voltages.
Current limit protection and thermal overload protection
protect the device against current overload conditions at
the output of the device. The typical thermal shutdown
temperature is 165°C. For normal operation, do not exceed
a junction temperature of 125°C (LT3060E, LT3060I,
LT3060MP) or 150°C (LT3060H).
The LT3060 IN pin withstands reverse voltages up to 50V.
The device limits current ﬂow to less than 300μA (typically
less than 50μA) and no negative voltage appears at OUT.
The device protects both itself and the load against batteries
that are plugged in backwards.
The SHDN pin cannot be driven below GND unless tied to
the IN pin. If the SHDN pin is driven below GND while IN is
powered, the output may turn on. SHDN pin logic cannot
be referenced to a negative supply voltage.
The LT3060 incurs no damage if its output is pulled below
ground. If the input is left open-circuit or grounded, the
output can be pulled below ground by 50V. No current
ﬂows through the pass transistor from the output.
However, current ﬂows in (but is limited by) the resistor
divider that sets the output voltage. Current ﬂows from
the bottom resistor in the divider and from the ADJ pin’s
internal clamp through the top resistor in the divider to
the external circuitry pulling OUT below ground. If the
input is powered by a voltage source, the output sources
current equal to its current limit capability and the LT3060
protects itself by thermal limiting. In this case, grounding
the SHDN pin turns off the device and stops the output
from sourcing current.
3060f
15
LT3060
APPLICATIONS INFORMATION
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 left opencircuit. Current ﬂow back into the output follows the curve
shown in Figure 7.
If the LT3060’s IN pin is forced below the OUT pin or the
OUT pin is pulled above the IN pin, input current typically
drops to less than 1μA. This occurs if the LT3060 input is
connected to a discharged (low voltage) battery and either
a backup battery or a second regulator holds up the output.
The state of the SHDN pin has no effect on the reverse
current if the output is pulled above the input.
2.0
REVERSE OUTPUT CURRENT (mA)
The LT3060 incurs no damage if the ADJ pin is pulled
above or below ground by less than 50V. If the input is
left open-circuit or grounded, the ADJ pin performs like
a large resistor (typically 30k) in series with a diode when
pulled below ground and like 30k in series with two diodes
when pulled above ground.
TJ = 25°C
1.8 VIN = 0V
CURRENT FLOWS
1.6
INTO OUT PIN
1.4 VOUT = VADJ
1.2
1.0
ADJ
0.8
0.6
0.4
0.2
OUT
0
0
5
10
15 20 25 30 35
OUTPUT VOLTAGE (V)
40
45
3060 F07
Figure 7. Reverse Output Current
3060f
16
LT3060
TYPICAL APPLICATION
Paralleling of Regulators for Higher Output Current
R1
0.15Ω
IN
VIN > 2.9V
+
OUT
LT3060
C1
2.2μF
SHDN
2.5V
200mA
R8
1.91k
1%
ADJ
GND REF/BYP
C3
1nF
C2
4.7μF
R9
604Ω
1%
R2
0.15Ω
IN
OUT
R6
1.74k
1%
LT3060
SHDN
SHDN
ADJ
R7
604Ω
1%
GND REF/BYP
C4
1nF
R3
200Ω
R4
200Ω
3
+
R5
1k
7
6
LT1637
2
–
C5
10nF
4
3060 TA03
3060f
17
LT3060
PACKAGE DESCRIPTION
DC Package
8-Lead Plastic DFN (2mm × 2mm)
(Reference LTC DWG # 05-08-1719 Rev Ø)
0.70 ±0.05
2.55 ±0.05
1.15 ±0.05 0.64 ±0.05
(2 SIDES)
PACKAGE
OUTLINE
0.25 ± 0.05
0.45 BSC
1.37 ±0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
R = 0.05
TYP
2.00 ±0.10
(4 SIDES)
PIN 1 BAR
TOP MARK
(SEE NOTE 6)
R = 0.115
TYP
5
8
0.40 ± 0.10
0.64 ± 0.10
(2 SIDES)
PIN 1 NOTCH
R = 0.20 OR
0.25 s 45°
CHAMFER
(DC8) DFN 0106 REVØ
4
0.200 REF
1
0.23 ± 0.05
0.45 BSC
0.75 ±0.05
1.37 ±0.10
(2 SIDES)
0.00 – 0.05
BOTTOM VIEW—EXPOSED PAD
NOTE:
1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
3060f
18
LT3060
PACKAGE DESCRIPTION
TS8 Package
8-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1637)
0.52
MAX
2.90 BSC
(NOTE 4)
0.65
REF
1.22 REF
1.4 MIN
3.85 MAX 2.62 REF
2.80 BSC
1.50 – 1.75
(NOTE 4)
PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.22 – 0.36
8 PLCS (NOTE 3)
0.65 BSC
0.80 – 0.90
0.20 BSC
0.01 – 0.10
1.00 MAX
DATUM ‘A’
0.30 – 0.50 REF
0.09 – 0.20
(NOTE 3)
1.95 BSC
TS8 TSOT-23 0802
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
3060f
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.
19
LT3060
RELATED PARTS
PART
NUMBER
DESCRIPTION
COMMENTS
LT1761
100mA, Low Noise LDO
300mV Dropout Voltage, Low Noise: 20μVRMS , VIN = 1.8V to 20V, ThinSOT package
LT1762
150mA, Low Noise LDO
300mV Dropout Voltage, Low Noise: 20μVRMS , VIN = 1.8V to 20V, MS8 package
LT1763
500mA, Low Noise LDO
300mV Dropout Voltage, Low Noise: 20μVRMS , VIN = 1.8V to 20V, SO-8 Package
LT1764/A
3A, Fast Transient Response, Low Noise LDO
340mV Dropout Voltage, Low Noise: 40μVRMS , VIN = 2.7V to 20V, TO-220 and DD
Packages “A” version stable also with ceramic caps
LT1962
300mA, Low Noise LDO
270mV Dropout Voltage, Low Noise: 20μVRMS , VIN = 1.8V to 20V, MS8 Package
LT1963/A
1.5A Low Noise, Fast Transient Response LDO
340mV Dropout Voltage, Low Noise: 40μVRMS , VIN = 2.5V to 20V, “A” version stable
with ceramic caps, TO-220, DD, SOT-223 and SO-8 Packages
LT1964
200mA, Low Noise, Negative LDO
340mV Dropout Voltage, Low Noise 30μVRMS , VIN = –1.8V to –20V, ThinSOT Package
LT1965
1.1A, Low Noise, Low Dropout Linear Regulator
290mV Dropout Voltage, Low Noise: 40μVRMS , VIN: 1.8V to 20V, VOUT: 1.2V to 19.5V,
stable with ceramic caps, TO-220, DDPak, MSOP and 3 × 3 DFN Packages
LT3008
20mA, 45V, 3uA Iq Micropower LDO
300mV Dropout Voltage, Low Iq: 3μA, VIN = 2.0V to 45V, VOUT = 0.6V to 39.5V;
ThinSOT and 2 × 2 DFN-6 packages
LT3009
20mA, 3uA Iq Micropower LDO
280mV Dropout Voltage, Low Iq: 3μA, VIN = 1.6V to 20V, ThinSOT and SC-70 packages
LT3010
50mA, High Voltage, Micropower LDO
VIN: 3V to 80V, VOUT: 1.275V to 60V, VDO = 0.3V, IQ = 30μA, ISD < 1μA, Low Noise:
<100μVRMS, Stable with 1μF Output Capacitor, Exposed MS8 Package
LT3011
50mA, High Voltage, Micropower LDO with
PWRGD
VIN: 3V to 80V, VOUT: 1.275V to 60V, VDO = 0.3V, IQ = 46μA, ISD < 1μA, Low Noise:
<100μVRMS, PowerGood, Stable with 1μF Output Capacitor, 3 × 3 DFN-10 and Exposed
MS12E Packages
LT3012
250mA, 4V to 80V, Low Dropout Micropower
Linear Regulator
VIN: 4V to 80V, VOUT: 1.24V to 60V, VDO = 0.4V, IQ = 40μA, ISD < 1μA, TSSOP-16E and
4mm × 3mm DFN-12 Packages
LT3013
250mA, 4V to 80V, Low Dropout Micropower
Linear Regulator with PWRGD
VIN: 4V to 80V, VOUT: 1.24V to 60V, VDO = 0.4V, IQ = 65μA, ISD < 1μA, PowerGood
feature; TSSOP-16E and 4mm × 3mm DFN-12 Packages
LT3014/HV
20mA, 3V to 80V, Low Dropout Micropower
Linear Regulator
VIN: 3V to 80V (100V for 2ms, “HV” version), VOUT: 1.22V to 60V, VDO = 0.35V, IQ =
7μA, ISD < 1μA, ThinSOT and 3mm × 3mm DFN-8 Packages
LT3050
100mA, Low Noise Linear Regulator with
340mV Dropout Voltage, Low Noise: 30μVRMS , VIN: 1.6V to 45V, VOUT: 0.6V to 44.5V,
Precision Current Limit and Diagnostic Functions. Programmable Precision Current Limit: ±5%, Programmable Minimum IOUT Monitor,
Output Current Monitor, Fault Indicator, Reverse Protection, 12-Lead 2mm × 3mm DFN
and MSOP Packages.
LT3080/-1
1.1A, Parallelable, Low Noise, Low Dropout
Linear Regulator
300mV Dropout Voltage (2-supply operation), Low Noise: 40μVRMS , VIN : 1.2V to 36V,
VOUT: 0V to 35.7V, current-based reference with 1-resistor VOUT set; directly parallelable
(no op amp required), stable with ceramic caps, TO-220, SOT-223, MSOP and 3 × 3
DFN Packages; “-1” version has integrated internal ballast resistor
LT3082
200mA, Parallelable, Single Resistor, Low
Dropout Linear Regulator
Outputs May Be Paralleled for Higher Output, Current or Heat Spreading, Wide Input
Voltage Range: 1.2V to 40V Low Value Input/Output Capacitors Required: 0.22μF, Single
Resistor Sets Output Voltage Initial Set Pin Current Accuracy: 1%, Low Output Noise:
40μVRMS (10Hz to 100kHz) Reverse-Battery Protection, Reverse-Current Protection
8-Lead SOT-23, 3-Lead SOT-223 and 8-Lead 3mm × 3mm DFN Packages
LT3085
500mA, Parallelable, Low Noise, Low Dropout
Linear Regulator
275mV Dropout Voltage (2-supply operation), Low Noise: 40μVRMS, VIN: 1.2V to 36V,
VOUT: 0V to 35.7V, current-based reference with 1-resistor VOUT set; directly parallelable
(no op amp required), stable with ceramic caps, MS8E and 2 × 3 DFN-6 packages
LT3092
200mA Two-Terminal Programmable Current
Source
Programmable Two-Terminal Current Source, Maximum Output Current: 200mA Wide
Input Voltage Range: 1.2V to 40V, Resistor Ratio Sets Output Current Initial Set Pin
Current Accuracy: 1%, Current Limit and Thermal Shutdown Protection ReverseVoltage Protection, Reverse-Current Protection 8-Lead SOT-23, 3-Lead SOT-223 and
8-Lead 3mm × 3mm DFN Packages
3060f
20 Linear Technology Corporation
LT 0110 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2010

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