LINER LT3008 45v vin, micropower, low noise, 100ma low dropout, linear regulator Datasheet

LT3060 Series
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
Fixed Output Voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V
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
Applications
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Battery-Powered Systems
Automotive Power Supplies
Industrial Power Supplies
Avionic Power Supplies
Portable Instruments
The LT®3060 series are micropower, low dropout voltage
(LDO) linear regulators that operate over a 1.6V to 45V
input supply range. The devices supply 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.
The LT3060 regulators optimize stability and transient
response with low ESR, ceramic output capacitors.
The regulators do not require the addition of ESR as is
common with other regulators.
Internal protection circuitry includes reverse-battery
protection, reverse-output protection, reverse-current
protection, current limit with foldback and thermal
shutdown. The LT3060 series are available in fixed output
voltages of 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and 5V, and as an
adjustable voltage regulator with an output voltage range
from the 600mV reference to 44.5V. The LT3060 regulators
are offered in the thermally enhanced 8-lead TSOT-23 and
8-lead (2mm × 2mm × 0.75mm) DFN packages.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
Typical Application
Dropout Voltage
350
2.5V Low Noise Regulator
VIN
3V TO
45V
1µF
VOUT
2.5V AT 100mA
30µVRMS NOISE
OUT
CFF
10nF
LT3060-2.5
SHDN
10µF
ADJ
GND REF/BYP
10nF
300
DROPOUT VOLTAGE (mV)
IN
TJ = 25°C
250
200
150
100
50
3060 TA01
0
0
10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
3060 TA02
3060fa
1
LT3060 Series
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)
E-, I-Grades........................................– 40°C to 125°C
MP-Grade........................................... –55°C to 125°C
H-Grade.............................................. –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 × 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
LT3060EDC-1.2#PBF
LT3060EDC-1.2#TRPBF
LFVT
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060IDC-1.2#PBF
LT3060IDC-1.2#TRPBF
LFVT
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060EDC-1.5#PBF
LT3060EDC-1.5#TRPBF
LFVV
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060IDC-1.5#PBF
LT3060IDC-1.5#TRPBF
LFVV
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060EDC-1.8#PBF
LT3060EDC-1.8#TRPBF
LFVW
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060IDC-1.8#PBF
LT3060IDC-1.8#TRPBF
LFVW
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060EDC-2.5#PBF
LT3060EDC-2.5#TRPBF
LFVX
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060IDC-2.5#PBF
LT3060IDC-2.5#TRPBF
LFVX
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060EDC-3.3#PBF
LT3060EDC-3.3#TRPBF
LFVY
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060IDC-3.3#PBF
LT3060IDC-3.3#TRPBF
LFVY
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060EDC-5#PBF
LT3060EDC-5#TRPBF
LFVZ
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060IDC-5#PBF
LT3060IDC-5#TRPBF
LFVZ
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
3060fa
2
LT3060 Series
order information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
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
LT3060ETS8-1.2#PBF
LT3060ETS8-1.2#TRPBF
LTFWB
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060ITS8-1.2#PBF
LT3060ITS8-1.2#TRPBF
LTFWB
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060MPTS8-1.2#PBF
LT3060MPTS8-1.2#TRPBF
LTFWB
8-Lead Plastic ThinSOT
–55°C to 125°C
LT3060HTS8-1.2#PBF
LT3060HTS8-1.2#TRPBF
LTFWB
8-Lead Plastic ThinSOT
–40°C to 150°C
LT3060ETS8-1.5#PBF
LT3060ETS8-1.5#TRPBF
LTFWC
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060ITS8-1.5#PBF
LT3060ITS8-1.5#TRPBF
LTFWC
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060MPTS8-1.5#PBF
LT3060MPTS8-1.5#TRPBF
LTFWC
8-Lead Plastic ThinSOT
–55°C to 125°C
LT3060HTS8-1.5#PBF
LT3060HTS8-1.5#TRPBF
LTFWC
8-Lead Plastic ThinSOT
–40°C to 150°C
LT3060ETS8-1.8#PBF
LT3060ETS8-1.8#TRPBF
LTFWD
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060ITS8-1.8#PBF
LT3060ITS8-1.8#TRPBF
LTFWD
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060MPTS8-1.8#PBF
LT3060MPTS8-1.8#TRPBF
LTFWD
8-Lead Plastic ThinSOT
–55°C to 125°C
LT3060HTS8-1.8#PBF
LT3060HTS8-1.8#TRPBF
LTFWD
8-Lead Plastic ThinSOT
–40°C to 150°C
LT3060ETS8-2.5#PBF
LT3060ETS8-2.5#TRPBF
LTFWF
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060ITS8-2.5#PBF
LT3060ITS8-2.5#TRPBF
LTFWF
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060MPTS8-2.5#PBF
LT3060MPTS8-2.5#TRPBF
LTFWF
8-Lead Plastic ThinSOT
–55°C to 125°C
LT3060HTS8-2.5#PBF
LT3060HTS8-2.5#TRPBF
LTFWF
8-Lead Plastic ThinSOT
–40°C to 150°C
LT3060ETS8-3.3#PBF
LT3060ETS8-3.3#TRPBF
LTFWG
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060ITS8-3.3#PBF
LT3060ITS8-3.3#TRPBF
LTFWG
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060MPTS8-3.3#PBF
LT3060MPTS8-3.3#TRPBF
LTFWG
8-Lead Plastic ThinSOT
–55°C to 125°C
LT3060HTS8-3.3#PBF
LT3060HTS8-3.3#TRPBF
LTFWG
8-Lead Plastic ThinSOT
–40°C to 150°C
LT3060ETS8-5#PBF
LT3060ETS8-5#TRPBF
LTFWH
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060ITS8-5#PBF
LT3060ITS8-5#TRPBF
LTFWH
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060MPTS8-5#PBF
LT3060MPTS8-5#TRPBF
LTFWH
8-Lead Plastic ThinSOT
–55°C to 125°C
LT3060HTS8-5#PBF
LT3060HTS8-5#TRPBF
LTFWH
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
LT3060EDC-1.2
LT3060EDC-1.2#TR
LFVT
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060IDC-1.2
LT3060IDC-1.2#TR
LFVT
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060EDC-1.5
LT3060EDC-1.5#TR
LFVV
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060IDC-1.5
LT3060IDC-1.5#TR
LFVV
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060EDC-1.8
LT3060EDC-1.8#TR
LFVW
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060IDC-1.8
LT3060IDC-1.8#TR
LFVW
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060EDC-2.5
LT3060EDC-2.5#TR
LFVX
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060IDC-2.5
LT3060IDC-2.5#TR
LFVX
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060EDC-3.3
LT3060EDC-3.3#TR
LFVY
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060IDC-3.3
LT3060IDC-3.3#TR
LFVY
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
3060fa
3
LT3060 Series
order information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3060EDC-5
LT3060EDC-5#TR
LFVZ
8-Lead (2mm × 2mm) Plastic DFN
–40°C to 125°C
LT3060IDC-5
LT3060IDC-5#TR
LFVZ
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
LT3060ETS8-1.2
LT3060ETS8-1.2#TR
LTFWB
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060ITS8-1.2
LT3060ITS8-1.2#TR
LTFWB
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060MPTS8-1.2
LT3060MPTS8-1.2#TR
LTFWB
8-Lead Plastic ThinSOT
–55°C to 125°C
LT3060HTS8-1.2
LT3060HTS8-1.2#TR
LTFWB
8-Lead Plastic ThinSOT
–40°C to 150°C
LT3060ETS8-1.5
LT3060ETS8-1.5#TR
LTFWC
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060ITS8-1.5
LT3060ITS8-1.5#TR
LTFWC
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060MPTS8-1.5
LT3060MPTS8-1.5#TR
LTFWC
8-Lead Plastic ThinSOT
–55°C to 125°C
LT3060HTS8-1.5
LT3060HTS8-1.5#TR
LTFWC
8-Lead Plastic ThinSOT
–40°C to 150°C
LT3060ETS8-1.8
LT3060ETS8-1.8#TR
LTFWD
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060ITS8-1.8
LT3060ITS8-1.8#TR
LTFWD
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060MPTS8-1.8
LT3060MPTS8-1.8#TR
LTFWD
8-Lead Plastic ThinSOT
–55°C to 125°C
LT3060HTS8-1.8
LT3060HTS8-1.8#TR
LTFWD
8-Lead Plastic ThinSOT
–40°C to 150°C
LT3060ETS8-2.5
LT3060ETS8-2.5#TR
LTFWF
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060ITS8-2.5
LT3060ITS8-2.5#TR
LTFWF
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060MPTS8-2.5
LT3060MPTS8-2.5#TR
LTFWF
8-Lead Plastic ThinSOT
–55°C to 125°C
LT3060HTS8-2.5
LT3060HTS8-2.5#TR
LTFWF
8-Lead Plastic ThinSOT
–40°C to 150°C
LT3060ETS8-3.3
LT3060ETS8-3.3#TR
LTFWG
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060ITS8-3.3
LT3060ITS8-3.3#TR
LTFWG
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060MPTS8-3.3
LT3060MPTS8-3.3#TR
LTFWG
8-Lead Plastic ThinSOT
–55°C to 125°C
LT3060HTS8-3.3
LT3060HTS8-3.3#TR
LTFWG
8-Lead Plastic ThinSOT
–40°C to 150°C
LT3060ETS8-5
LT3060ETS8-5#TR
LTFWH
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060ITS8-5
LT3060ITS8-5#TR
LTFWH
8-Lead Plastic ThinSOT
–40°C to 125°C
LT3060MPTS8-5
LT3060MPTS8-5#TR
LTFWH
8-Lead Plastic ThinSOT
–55°C to 125°C
LT3060HTS8-5
LT3060HTS8-5#TR
LTFWH
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/
3060fa
4
LT3060 Series
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)
Regulated Output Voltage
(Note 5)
CONDITIONS
ILOAD = 100mA
TYP
1.6
MAX
2.1
UNITS
V
LT3060-1.2: VIN = 2.1V, ILOAD = 1mA
2.1V < VIN < 45V, 1mA < ILOAD < 100mA
2.1V < VIN < 45V, 1mA < ILOAD < 100mA
(E-, I-, MP-Grades)
(H-Grade)
l
l
1.188
1.176
1.170
1.2
1.2
1.2
1.212
1.224
1.224
V
V
V
LT3060-1.5: VIN = 2.1V, ILOAD = 1mA
2.1V < VIN < 45V, 1mA < ILOAD < 100mA
2.1V < VIN < 45V, 1mA < ILOAD < 100mA
(E-, I-, MP-Grades)
(H-Grade)
l
l
1.485
1.470
1.463
1.5
1.5
1.5
1.515
1.530
1.530
V
V
V
LT3060-1.8: VIN = 2.35V, ILOAD = 1mA
2.35V < VIN < 45V, 1mA < ILOAD < 100mA (E-, I-, MP-Grades)
2.35V < VIN < 45V, 1mA < ILOAD < 100mA (H-Grade)
l
l
1.782
1.764
1.755
1.8
1.8
1.8
1.818
1.836
1.836
V
V
V
LT3060-2.5: VIN = 3.05V, ILOAD = 1mA
3.05V < VIN < 45V, 1mA < ILOAD < 100mA (E-, I-, MP-Grades)
3.05V < VIN < 45V, 1mA < ILOAD < 100mA (H-Grade)
l
l
2.475
2.450
2.438
2.5
2.5
2.5
2.525
2.550
2.550
V
V
V
LT3060-3.3: VIN = 3.85V, ILOAD = 1mA
3.85V < VIN < 45V, 1mA < ILOAD < 100mA (E-, I-, MP-Grades)
3.85V < VIN < 45V, 1mA < ILOAD < 100mA (H-Grade)
l
l
3.267
3.234
3.218
3.3
3.3
3.3
3.333
3.366
3.366
V
V
V
l
l
4.950
4.900
4.875
5
5
5
5.050
5.100
5.100
V
V
V
l
l
594
588
585
l
600
600
600
0.9
l
1
l
1.1
l
1.2
l
1.3
l
1.5
l
0.6
l
l
2.4
l
l
2.5
l
l
2.6
l
l
2.8
l
l
3.1
l
l
3.7
l
l
0.2
606
612
612
3.5
7
4.2
8
4.5
12
5.4
15
7
19
8.5
25
3.5
4
10
18
12
22
14
27
19
37
24
49
35
75
4
9
LT3060-5:
ADJ Pin Voltage
(Notes 4, 5)
LT3060:
Line Regulation
LT3060-1.2:
LT3060-1.5:
LT3060-1.8:
LT3060-2.5:
LT3060-3.3:
LT3060-5:
Load Regulation
(Note 15)
MIN
l
LT3060:
(Note 4)
LT3060-1.2:
LT3060-1.5:
LT3060-1.8:
LT3060-2.5:
LT3060-3.3:
LT3060-5:
LT3060:
(Note 4)
VIN = 5.55V, ILOAD = 1mA
5.55V < VIN < 45V, 1mA < ILOAD < 100mA (E-, I-, MP-Grades)
5.55V < VIN < 45V, 1mA < ILOAD < 100mA (H-Grade)
VIN = 2.1V, ILOAD = 1mA
2.1V < VIN < 45V, 1mA < ILOAD < 100mA
2.1V < VIN < 45V, 1mA < ILOAD < 100mA
ΔVIN = 2.1V to 45V, ILOAD = 1mA
ΔVIN = 2.1V to 45V, ILOAD = 1mA
ΔVIN = 2.1V to 45V, ILOAD = 1mA
ΔVIN = 2.1V to 45V, ILOAD = 1mA
ΔVIN = 2.35V to 45V, ILOAD = 1mA
ΔVIN = 2.35V to 45V, ILOAD = 1mA
ΔVIN = 3.05V to 45V, ILOAD = 1mA
ΔVIN = 3.05V to 45V, ILOAD = 1mA
ΔVIN = 3.85V to 45V, ILOAD = 1mA
ΔVIN = 3.85V to 45V, ILOAD = 1mA
ΔVIN = 5.55V to 45V, ILOAD = 1mA
ΔVIN = 5.55V to 45V, ILOAD = 1mA
ΔVIN = 2.1V to 45V, ILOAD = 1mA
ΔVIN = 2.1V to 45V, ILOAD = 1mA
VIN = 2.1V, ILOAD = 1mA to 100mA
VIN = 2.1V, ILOAD = 1mA to 100mA
VIN = 2.1V, ILOAD = 1mA to 100mA
VIN = 2.1V, ILOAD = 1mA to 100mA
VIN = 2.35V, ILOAD = 1mA to 100mA
VIN = 2.35V, ILOAD = 1mA to 100mA
VIN = 3.05V, ILOAD = 1mA to 100mA
VIN = 3.05V, ILOAD = 1mA to 100mA
VIN = 3.85V, ILOAD = 1mA to 100mA
VIN = 3.85V, ILOAD = 1mA to 100mA
VIN = 5.55V, ILOAD = 1mA to 100mA
VIN = 5.55V, ILOAD = 1mA to 100mA
VIN = 2.1V, ILOAD = 1mA to 100mA
VIN = 2.1V, ILOAD = 1mA to 100mA
(E-, I-, MP-Grades)
(H-Grade)
(E-, I-, MP-Grades)
(H-Grade)
(E-, I-, MP-Grades)
(H-Grade)
(E-, I-, MP-Grades)
(H-Grade)
(E-, I-, MP-Grades)
(H-Grade)
(E-, I-, MP-Grades)
(H-Grade)
(E-, I-, MP-Grades)
(H-Grade)
(E-, I-, MP-Grades)
(H-Grade)
(E-, I-, MP-Grades)
(H-Grade)
(E-, I-, MP-Grades)
(H-Grade)
(E-, I-, MP-Grades)
(H-Grade)
(E-, I-, MP-Grades)
(H-Grade)
(E-, I-, MP-Grades)
(H-Grade)
(E-, I-, MP-Grades)
(H-Grade)
(E-, I-, MP-Grades)
(H-Grade)
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
3060fa
5
LT3060 Series
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
Dropout Voltage
VIN = VOUT(NOMINAL)
(Notes 6, 7)
CONDITIONS
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
GND Pin Current
VIN = VOUT(NOMINAL) + 0.55V ILOAD = 1mA
ILOAD = 10mA
(Notes 6, 8)
ILOAD = 50mA
ILOAD = 100mA
Quiescent Current in
VIN = 45V, VSHDN = 0V
Shutdown
ADJ Pin Bias Current
VIN = 2.1V
(Notes 4, 9)
Output Voltage Noise
COUT = 10µF, ILOAD = 100mA, CBYP = 0.01µF
VOUT = 600mV, BW = 10Hz to 100kHz
Shutdown Threshold
VOUT = Off to On
VOUT = On to Off
SHDN Pin Current
VSHDN = 0V
VSHDN = 45V
(Note 10)
Ripple Rejection
LT3060-1.2: VIN = 2.7V (Avg)
VRIPPLE = 0.5VP-P,
LT3060-1.5: VIN = 3V (Avg)
fRIPPLE = 120Hz,
LT3060-1.8: VIN = 3.3V (Avg)
ILOAD = 100mA
Current Limit
Input Reverse Leakage
Current
Reverse Output Current
(Note 11)
MIN
TYP
75
l
l
l
l
l
40
60
160
0.8
2
0.3
MAX
110
180
200
300
280
410
350
510
80
100
350
1.8
4
1
l
15
60
l
150
l
240
l
300
l
30
l
l
UNITS
mV
mV
mV
mV
mV
mV
mV
mV
µA
µA
µA
mA
mA
µA
nA
µVRMS
0.3
0.8
0.7
64
0.9
79
62
77
dB
l
l
1.5
1
3
V
V
µA
µA
dB
60
75
dB
LT3060-2.5: VIN = 4V (Avg)
LT3060-3.3: VIN = 4.8V (Avg)
58
73
dB
55
70
dB
LT3060-5:
VIN = 6.5V (Avg)
52
67
dB
LT3060:
VIN = 2.1V (Avg) (Note 4)
70
85
dB
200
300
mA
mA
µA
VIN = 7V, VOUT = 0
VIN = VOUT(NOMINAL) + 1V (Notes 6, 12), ΔVOUT = –5%
VIN = –45V, VOUT = 0
l
110
l
LT3060-1.2: VOUT = 1.2V, VIN = 0V
LT3060-1.5: VOUT = 1.5V, VIN = 0V
5
10
µA
5
10
µA
LT3060-1.8: VOUT = 1.8V, VIN = 0V
5
10
µA
LT3060-2.5: VOUT = 2.5V, VIN = 0V
LT3060-3.3: VOUT = 3.3V, VIN = 0V
5
10
µA
5
10
µA
LT3060-5:
VOUT = 5V, VIN = 0V
5
10
µA
LT3060:
VOUT = 1.2V, VIN = 0V (Note 4)
0.2
10
µA
3060fa
6
LT3060 Series
Electrical Characteristics
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 regulators are tested and specified under pulse load
conditions such that TJ ≅ TA . The LT3060E regulators are 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 regulators are guaranteed over the full –40°C to 125°C operating
junction temperature range. The LT3060MP regulators are 100% tested
over the –55°C to 125°C operating junction temperature range. The
LT3060H regulators are 100% tested at the 150°C operating junction
temperature. High junction temperatures degrade operating lifetimes.
Operating lifetime is derated at junction temperatures greater than 125°C.
Note 4: The LT3060 adjustable version 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
adjustable version 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. This
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 the
LT3060, LT3060-1.2, LT3060-1.5 and LT3060-1.8, dropout is limited
by the minimum input specification under some output voltages and
load conditions. See the Minimum Input Voltage curve in the Typical
Performance Characteristics section.
Note 8: GND pin current is tested with VIN = VOUT(NOMINAL) + 0.55V 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.
Note 15: The load regulation specification is guaranteed for the fixed
voltage options in the DFN package. The load regulation specification
cannot be guaranteed for the fixed voltage options in the TS8 package due
to production test limitations. The TS8 packages are tested similarly to the
LT3060 adjustable version with the ADJ connected to the OUT pin.
3060fa
7
LT3060 Series
Typical Performance Characteristics
Typical Dropout Voltage
500
500
400
TJ = 125°C
300
TJ = 25°C
200
150
100
50
0
0
500
450
350
300
TJ ≤ 25°C
250
200
150
OUTPUT VOLTAGE (V)
LT3060
30
20
3060 G03
LT3060-1.5 Output Voltage
1.224
I = 1mA
1.220 L
1.530
I = 1mA
1.525 L
1.216
1.520
1.212
1.515
1.208
1.204
1.200
1.196
1.192
1.188
1.510
1.505
1.500
1.495
1.490
1.485
1.480
1.180
1.475
1.176
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
1.470
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3060 G05
LT3060-1.8 Output Voltage
3060 G06
LT3060-3.3 Output Voltage
LT3060-2.5 Output Voltage
1.836
I = 1mA
1.830 L
2.55
2.54
1.824
3.366
I = 1mA
3.355 L
IL = 1mA
3.344
2.53
OUTPUT VOLTAGE (V)
1.818
1.812
1.806
1.800
1.794
1.788
1.782
IL = 1mA
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)
1.184
VSHDN = 0V
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3060 G04
OUTPUT VOLTAGE (V)
150
50
OUTPUT VOLTAGE (V)
QUIESCENT CURRENT (µA)
LT3060-1.2/-1.5/-1.8/-2.5/-3.3/-5
IL = 10mA
200
LT3060-1.2 Output Voltage
VIN = 6V, VSHDN = VIN
70 RL = ∞ (120k FOR LT3060)
IL = 0 (5µA FOR LT3060)
10
250
50
Quiescent Current
40
300
100
0
IL = 50mA
350
3060 G02
80
50
400
100
3060 G01
60
IL = 100mA
450
TJ ≤ 150°C
400
0
10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
= TEST POINTS
OUTPUT VOLTAGE (V)
DROPOUT VOLTAGE (mV)
450
550
DROPOUT VOLTAGE (mV)
GUARANTEED DROPOUT VOLTAGE (mV)
550
250
Dropout Voltage
Guaranteed Dropout Voltage
550
350
TA = 25°C, unless otherwise noted.
2.52
2.51
2.50
2.49
2.48
3.333
3.322
3.311
3.300
3.289
3.278
3.267
1.776
2.47
1.770
2.46
3.245
1.764
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
2.45
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3.234
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3060 G07
3.256
3060 G08
3060 G09
3060fa
8
LT3060 Series
Typical Performance Characteristics
LT3060-5 Output Voltage
LT3060 ADJ Pin Voltage
IL = 1mA
5.08
5.04
ADJ PIN VOLTAGE (V)
5.02
5.00
4.98
4.96
4.94
0.606
0.604
0.602
0.600
0.598
0.596
0.594
0.592
0.590
4.90
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
0.588
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3060 G11
100
75
VSHDN = VIN
25
125
100
75
2
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
0
10
LT3060-3.3 Quiescent Current
QUIESCENT CURRENT (µA)
100
75
VSHDN = VIN
2
8
9
10
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
VSHDN = VIN
3060 G16
VSHDN = 0V
0
1
2
2
3 4 5 6 7
INPUT VOLTAGE (V)
3 4 5 6 7
INPUT VOLTAGE (V)
8
8
9
10
3060 G15
TJ = 25°C
RL = 120k
VOUT = 0.6V
60
50
40
VSHDN = VIN
30
20
10
VSHDN = 0V
1
10
3060 G12
VSHDN = VIN
50
70
75
0
9
LT3060 Quiescent Current
100
0
8
75
80
125
50
3 4 5 6 7
INPUT VOLTAGE (V)
100
3060 G14
150
25
VSHDN = 0V
1
3 4 5 6 7
INPUT VOLTAGE (V)
TJ = 25°C
175 RL = 1M
VOUT = 5V
125
0
2
2
125
LT3060-5 Quiescent Current
150
25
1
1
150
0
200
TJ = 25°C
175 RL = 660k
VOUT = 3.3V
50
0
0
25
VSHDN = 0V
3060 G13
200
0
VSHDN = VIN
50
VSHDN = 0V
TJ = 25°C
175 RL = 500k
VOUT = 2.5V
150
25
VSHDN = 0V
VSHDN = VIN
50
LT3060-2.5 Quiescent Current
QUIESCENT CURRENT (µA)
QUIESCENT CURRENT (µA)
125
1
75
200
TJ = 25°C
175 RL = 360k
VOUT = 1.8V
150
0
100
0
200
TJ = 25°C
175 RL = 300k
VOUT = 1.5V
0
125
LT3060-1.8 Quiescent Current
LT3060-1.5 Quiescent Current
200
50
150
25
4.92
3060 G10
QUIESCENT CURRENT (µA)
TJ = 25°C
175 RL = 240k
VOUT = 1.2V
QUIESCENT CURRENT (µA)
OUTPUT VOLTAGE (V)
5.06
QUIESCENT CURRENT (µA)
LT3060-1.2 Quiescent Current
200
0.612
I = 1mA
0.610 VL = 2.1V
IN
0.608
QUIESCENT CURRENT (µA)
5.10
TA = 25°C, unless otherwise noted.
9
10
3060 G17
0
VSHDN = 0
0
5
10
15 20 25 30 35
INPUT VOLTAGE (V)
40
45
3060 G18
3060fa
9
LT3060 Series
Typical Performance Characteristics
LT3060-1.2 GND Pin Current
1.75
2.25
2.00
GND PIN CURRENT (mA)
2.00
RL = 12Ω
IL = 100mA*
1.50
1.25
1.00
RL = 24Ω
IL = 50mA*
0.75
RL = 1.2k
IL = 1mA*
0.50
0.25
0
0
1
2
1.75
8
9
1.25
1.00
0.25
0
10
1.75
1.25
1.00
RL = 50Ω
IL = 50mA*
0.75
0.50
RL = 2.5k
IL = 1mA*
0.25
0
0
1
2
1
2
2.50
8
8
2.00
1.75
1.50
9
RL = 3.3k
IL = 1mA*
0.50
0
10
1
0
2
3060 G22
RL = 330Ω
IL = 10mA*
3 4 5 6 7
INPUT VOLTAGE (V)
8
RL = 6Ω
IL = 100mA*
1.25
1.00
RL = 12Ω
IL = 50mA*
0.75
RL = 600Ω
IL = 1mA*
0.25
0
0
1
2
RL = 60Ω
IL = 10mA*
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
RL = 1.8k
IL = 1mA*
0.50
0
1
2
RL = 180Ω
IL = 10mA*
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
3060 G21
2.50
9
TJ = 25°C
*FOR VOUT = 5V
VSHDN = VIN
2.25
2.00
1.75
RL = 50Ω
IL = 100mA*
1.50
1.25
1.00
RL = 100Ω
IL = 50mA*
0.75
RL = 5k
IL = 1mA*
0.50
0.25
10
0
0
2
RL = 500Ω
IL = 10mA*
3 4 5 6 7
INPUT VOLTAGE (V)
8
9
10
3060 G24
GND Pin Current vs ILOAD
VIN = VOUT(NOMINAL) + 1V
3.5
GND PIN CURRENT (mA)
GND PIN CURRENT (mA)
2.00
RL = 36Ω
IL = 50mA*
0.75
3060 G23
4.0
TJ = 25°C
*FOR VOUT = 0.6V
VSHDN = VIN
2.25
0.50
1.00
LT3060-5 GND Pin Current
RL = 66Ω
IL = 50mA*
0.75
LT3060 GND Pin Current
1.50
1.25
3060 G20
1.25
1.00
RL = 18Ω
IL = 100mA*
1.50
0
10
RL = 33Ω
IL = 100mA*
0.25
2.50
1.75
9
1.75
0.25
TJ = 25°C
*FOR VOUT = 3.3V
VSHDN = VIN
2.25
RL = 250Ω
IL = 10mA*
3 4 5 6 7
INPUT VOLTAGE (V)
2.00
RL = 150Ω
IL = 10mA*
3 4 5 6 7
INPUT VOLTAGE (V)
TJ = 25°C
*FOR VOUT = 1.8V
VSHDN = VIN
2.25
LT3060-3.3 GND Pin Current
RL = 25Ω
IL = 100mA*
1.50
0
3060 G19
GND PIN CURRENT (mA)
GND PIN CURRENT (mA)
2.00
RL = 1.5k
IL = 1mA*
0.50
TJ = 25°C
*FOR VOUT = 2.5V
VSHDN = VIN
2.25
RL = 30Ω
IL = 50mA*
0.75
LT3060-2.5 GND Pin Current
2.50
RL = 15Ω
IL = 100mA*
1.50
RL = 120Ω
IL = 10mA*
3 4 5 6 7
INPUT VOLTAGE (V)
LT3060-1.8 GND Pin Current
2.50
TJ = 25°C
*FOR VOUT = 1.5V
VSHDN = VIN
GND PIN CURRENT (mA)
TJ = 25°C
*FOR VOUT = 1.2V
VSHDN = VIN
2.25
GND PIN CURRENT (mA)
LT3060-1.5 GND Pin Current
2.50
GND PIN CURRENT (mA)
2.50
TA = 25°C, unless otherwise noted.
3.0
2.5
2.0
1.5
1.0
0.5
10
3060 G25
0
0
10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
3060 G26
3060fa
10
LT3060 Series
Typical Performance Characteristics
2.0
2.0
1.8
1.8
SHDN PIN INPUT CURRENT (µA)
SHDN PIN INPUT CURRENT (µA)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0
5
ADJ Pin Bias Current
250
40
225
30
200
CURRENT LIMIT (mA)
50
20
10
0
–10
–20
10 15 20 25 30 35
SHDN PIN VOLTAGE (V)
40
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)
3060 G29
45
3060 G28
Current Limit vs Temperature
Current Limit vs VIN –VOUT
250
∆VOUT = – 5%
TJ = 125°C
225
TJ = 25°C
175
CURRENT LIMIT (mA)
0
VSHDN = 45V
0.2
0.2
TJ = –50°C
150
125
100
75
200
1-PHASE
1752-PHASE
1503-PHASE
4-PHASE
1256-PHASE
100
75
–30
50
50
–40
25
25 VIN = 7V
VOUT = 0V
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
–50
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
0
0
5
3060 G30
350
REVERSE OUTPUT CURRENT (µA)
TJ = 25°C
1.8 VIN = 0V
CURRENT FLOWS
1.6
INTO OUT PIN
1.4 VOUT = VADJ
1.2
ADJ
0.6
0.4
0.2
0
OUT
0
5
10
15 20 25 30 35
OUTPUT VOLTAGE (V)
40
3060 G32
LT3060-1.2/-1.5/-1.8/-2.5/-3.3/-5
Reverse Output Current
2.0
0.8
45
3060 G31
LT3060 Reverse Output Current
1.0
10 15 20 25 30 35 40
INPUT/OUTPUT DIFFERENTIAL (V)
45
3060 G33
TJ = 25°C
VIN = 0V
300
Reverse Output Current
50
LT3060-1.2
45
REVERSE OUTPUT CURRENT (µA)
SHDN PIN THRESHOLD (V)
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 G27
ADJ PIN BIAS CURRENT (nA)
SHDN Pin Input Current
SHDN Pin Input Current
SHDN Pin Threshold
REVERSE OUTPUT CURRENT (mA)
TA = 25°C, unless otherwise noted.
LT3060-1.5
250
LT3060-1.8
200
LT3060-2.5
150
LT3060-3.3
100
50
0
LT3060-5
0
5
10
15 20 25 30 35
OUTPUT VOLTAGE (V)
40
45
3060 G34
40
35
30
25
VIN = 0V, VOUT = VADJ = 1.2V (LT3060)
VOUT = 1.2V (LT3060-1.2)
VOUT = 1.5V (LT3060-1.5)
VOUT = 1.8V (LT3060-1.8)
VOUT = 2.5V (LT3060-2.5)
VOUT = 3.3V (LT3060-3.3)
VOUT = 5V (LT3060-5)
ADJ (LT3060)
20
VOUT = 5V
VOUT = 3.3V
VOUT = 2.5V
10 OUT (LT3060-1.2/-1.5/
VOUT = 1.8V
-1.8/2.5/-3.3/-5)
5
VOUT = 1.5V
OUT (LT3060)
VOUT = 1.2V
0
0.6V50 75 100 125 150 175
–75 –50 –25VOUT
0 = 25
TEMPERATURE (°C)
15
3060 G35
3060fa
11
LT3060 Series
Typical Performance Characteristics
LT3060-5 Input Ripple Rejection
100
100
VOUT = 0.6V
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)
Minimum Input Voltage
2.0
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)
LOAD REGULATION (mV)
IL = 100mA
1.6
IL = 50mA
1.0
0.8
0.6
0.4
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3060 G39
10
–10
LT3060-5
LT3060-3.3
LT3060-2.5
LT3060-1.8
LT3060-1.5
LT3060-1.2
LT3060
–25
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3060 G40
VIN = VOUT(NOMINAL) + 0.55V (LT3060-1.8/-2.5/-3.3/-5)
VIN = 2.1V (LT3060/-1.2/-1.5)
∆IL = 1mA TO 100mA
CREF/BYP = 100pF
1
VOUT = 0.6V
0.1
CREF/BYP = 10nF
0.01
COUT = 10µF
IL = 100mA
10
100
40
30
3060 G38
Output Noise Spectral Density
CREF/BYP = 0, CFF = 0
Output Noise Spectral Density
vs CREF/BYP, CFF = 0
VOUT = 5V
50
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
–5
–20
VSHDN = VIN
60
Load Regulation
–15
CREF/BYP = 1nF
1k
10k
FREQUENCY (Hz)
100k
3060 G42
CREF/BYP = 0
70
3060 G37
0
1.8
0.2
50
5
2.2
1.2
60
20
3060 G36
1.4
70
CREF/BYP = 10nF
80
10
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
70
Ripple Rejection vs Temperature
90
CREF/BYP = 10nF, CFF = 0
80
RIPPLE REJECTION (dB)
RIPPLE REJECTION (dB)
80
MINIMUM INPUT VOLTAGE (V)
CREF/BYP = CFF = 10nF
90
OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz)
90
100
RIPPLE REJECTION (dB)
Input Ripple Rejection
TA = 25°C, unless otherwise noted.
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
10
100
COUT = 10µF
IL = 100mA
1k
10k
FREQUENCY (Hz)
100k
3060 G41
Output Noise Spectral Density
vs CFF, CREF/BYP = 10nF
CFF = 0
1
CFF = 10nF
0.1
0.01
VOUT = 5V
COUT = 10µF
IL = 100mA
10
100
CFF = 1nF
CFF = 100pF
1k
10k
FREQUENCY (Hz)
100k
3060 G43
3060fa
12
LT3060 Series
Typical Performance Characteristics
80
CREF/BYP = 0
CREF/BYP = 10pF
70
60
CREF/BYP = 100pF
50
40
30
CREF/BYP = 1nF
20
CREF/BYP = 10nF
10
0
0.01
CREF/BYP = 100nF
0.1
1
10
LOAD CURRENT (mA)
100
3060 G44
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
1
10
100
0.01
0.1
LOAD CURRENT (mA)
110
VOUT
100µV/DIV
RMS Output Noise
vs Feedforward Capacitor (CFF)
VOUT = 5V
100
3060 G45
90
80
VOUT = 3.3V
VOUT = 2.5V
f = 10Hz TO 100kHz
CREF/BYP = 10nF
COUT = 10µF
IFB-DIVIDER = 5µA
IL = 100mA
70
60
50
40
30
VOUT = 0.6V
20 V
VOUT = 1.2V
OUT = 1.8V
10
VOUT = 1.5V
0
1n
10n
10p
100p
FEEDFORWARD CAPACITOR, CFF (F)
3060 G46
LT3060-5 10Hz to 100kHz Output
Noise, CREF/BYP = 10nF, CFF = 10nF
LT3060-5 10Hz to 100kHz Output
Noise, CREF/BYP = 10nF, CFF = 0
VOUT
100µV/DIV
COUT = 10µF
IL = 100mA
VOUT = 5V
1ms/DIV
3060 G47
COUT = 10µF
IL = 100mA
VOUT = 5V
1ms/DIV
3060 G48
LT3060-5 Transient Response,
CFF = 10nF
LT3060-5 Transient Response,
CFF = 0
VOUT
50mV/DIV
120
OUTPUT NOISE VOLTAGE (µVRMS)
VOUT = 0.6V
100 COUT = 10µF
90
RMS Output Noise vs Load Current
CREF/BYP = 10nF, CFF = 0
OUTPUT NOISE VOLTAGE (µVRMS)
OUTPUT NOISE VOLTAGE (µVRMS)
110
RMS Output Noise vs Load Current
vs CREF/BYP, CFF = 0
TA = 25°C, unless otherwise noted.
VOUT = 5V
VOUT
20mV/DIV
VOUT = 5V
∆IOUT = 10mA TO 100mA
∆IOUT = 10mA TO 100mA
IOUT
50mA/DIV
IOUT
50mA/DIV
VIN = 6V
100µs/DIV
COUT = CIN = 10µF
IFB-DIVIDER = 5µA
3060 G49
VIN = 6V
20µs/DIV
COUT = CIN = 10µF
IFB-DIVIDER = 5µA
3060 G50
3060fa
13
LT3060 Series
Typical Performance Characteristics
LT3060-5 Transient Response
Load Dump
VOUT
2V/DIV
RL = 50Ω
VOUT
2V/DIV
RL = 50Ω
REF/BYP
500mV/DIV
REF/BYP
500mV/DIV
SHDN
1V/DIV
SHDN
1V/DIV
VIN
10V/DIV
3060 G51
COUT = CIN = 2.2µF
CREF/BYP = CFF = 10nF
IFB-DIVIDER = 5µA
COUT = CIN = 2.2µF
CFF = 0
3060 G52
4ms/DIV
COUT = CIN = 2.2µF
CFF = 0
Start-Up Time
vs REF/BYP Capacitor
100
CFF = 0
10
START-UP TIME (ms)
START-UP TIME (ms)
100
1
0.1
0.01
10p
SHDN Transient Response
CREF/BYP = 10nF
SHDN Transient Response
CREF/BYP = 0
VOUT VOUT = 5V
10mV/DIV
VIN = 12V TO 45V
2ms/DIV
TA = 25°C, unless otherwise noted.
100p
10n
1n
REF/BYP CAPACITOR (F)
100n
3060 G54
4ms/DIV
3060 G53
Start-Up Time vs CFF
CREF/BYP = 0
IFB-DIVIDER = 5µA
10
1
LT3060-3.3
LT3060-2.5
LT3060-1.8
LT3060-1.5
0.1
0.01
10p
LT3060-5
LT3060-1.2
100p
1n
10n
FEEDFORWARD CAPACITOR, CFF (F)
100n
3060 G55
3060fa
14
LT3060 Series
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.
Connecting a capacitor from ADJ to OUT reduces output
noise and improves transient response for output voltages
greater than 600mV. See the Applications Information section for calculating the value of the feedforward capacitor.
For fixed voltage versions of the LT3060, if low noise and
fast transient response is not required, this pin must be
left floating (unconnected).
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.
For the adjustable LT3060, 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.
3060fa
15
LT3060 Series
Applications Information
The LT3060 series are micropower, low noise, low dropout voltage, 100mA linear regulators with shutdown. The
devices supply up to 100mA at a typical dropout voltage
of 300mV and operate over a 1.6V to 45V input range.
A single external capacitor provides 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 for the
adjustable version and 45µA for the fixed voltage versions,
while providing fast transient response with a minimum
low ESR 2.2μF ceramic output capacitor. In shutdown,
quiescent current is less than 1μA and the reference softstart capacitor is reset.
The LT3060 regulators optimize stability and transient
response with low ESR, ceramic output capacitors. The
regulators do not require the addition of ESR as is common with other regulators. The LT3060 adjustable version
typically provides 0.1% line regulation and 0.03% load
regulation. For fixed voltage versions, load regulation is
slightly increased due to 20mΩ of typical resistance in
series with the output. Curves of load regulation appear
in the Typical Performance Characteristics section.
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 adjustable version 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.
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 adjustable device 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
IN
VIN
OUT
LT3060
SHDN
VOUT
R2
ADJ
GND REF/BYP
R1
VOUT = 0.6 V 1+
R2
– 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
3060fa
16
LT3060 Series
Applications Information
Table 1 shows 1% resistor divider values for some common output voltages with a resistor divider current of
about 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
Bypass Capacitance, Output Voltage Noise and
Transient Response
IN
SHDN
VOUT
R2
LT3060
CFF
COUT
ADJ
GND REF/BYP
R1
CREF/BYP
3060 F02
4.7nF
• IFB−DIVIDER
5µA
V
IFB−DIVIDER = OUT
R1+R 2
CFF ≥
(
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 Perf­
ormance Characteristics section).
)
Figure 2. Feedforward Capacitor for Fast Transient Response
VOUT = 5V
COUT = 10µF
IFB-DIVIDER = 5µA
0
VOUT
50mV/DIV
VIN
OUT
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 regulators do
not have unlimited power supply rejection and will pass a
small portion of the input noise through to the output.
FEEDFORWARD
CAPACITOR, CFF
The LT3060 regulators provide 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
bypasses 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.
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 bypasses 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.
100pF
1nF
10nF
LOAD CURRENT
100mA/DIV
100µs/DIV
3060 F03
Figure 3. Transient Response vs Feedforward Capacitor
3060fa
17
LT3060 Series
Applications Information
During start-up, the internal reference soft-starts 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 pulled low during shutdown to
reset the internal reference.
Start-up time is also affected by the use of a feedforward
capacitor. Start-up time is directly proportional to the size
of the feedforward capacitor and 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 regulators are 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 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
20
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
40
20
X5R
CHANGE IN VALUE (%)
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.
BOTH CAPACITORS ARE 16V,
1210 CASE SIZE, 10µF
0
–20
–40
–60
Y5V
–80
–100
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.
–20
–40
2
4
8
6
10 12
DC BIAS VOLTAGE (V)
14
16
3060 F04
Figure 4. Ceramic Capacitor DC Bias Characteristics
Y5V
–60
–80
0
X5R
0
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
3060fa
18
LT3060 Series
Applications Information
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 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.
VOUT = 0.6V
COUT = 10µF
CREF/BYP = 10nF
ILOAD = 100mA
VOUT
500µV/DIV
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
4ms/DIV
3060 F06
Figure 6. Noise Resulting from Tapping on a Ceramic Capacitor
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,
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 regulators have 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
3060fa
19
LT3060 Series
Applications Information
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.
Calculating Junction Temperature
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 power dissipated by the device equals:
Tables 2 and 3 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.
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
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?
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 regulators incorporate 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-to-input 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).
3060fa
20
LT3060 Series
Applications Information
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.
The LT3060 incurs no damage if the ADJ pin is pulled
above or below ground by less than 50V. For the adjustable version, 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.
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 Figures 7 and 8.
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.
350
TJ = 25°C
1.8 VIN = 0V
CURRENT FLOWS
1.6
INTO OUT PIN
1.4 VOUT = VADJ
REVERSE OUTPUT CURRENT (µA)
REVERSE OUTPUT CURRENT (mA)
2.0
1.2
1.0
ADJ
0.8
0.6
0.4
0.2
0
TJ = 25°C
VIN = 0V
300
LT3060-1.2
LT3060-1.5
250
LT3060-1.8
200
LT3060-2.5
150
LT3060-3.3
50
LT3060-5
OUT
0
5
10
15 20 25 30 35
OUTPUT VOLTAGE (V)
40
45
VOUT = 5
VOUT = 3
VOUT = 2
VOUT = 1
VOUT = 1
VOUT = 1
VOUT = 0
100
0
0
5
10
15 20 25 30 35
OUTPUT VOLTAGE (V)
40
45
3060 F08w
3060 F07
Figure 7. LT3060 Reverse Output Current
Figure 8. LT3060-1.2/-1.5/-1.8/-2.5/-3.3/-5
Reverse Output Current
3060fa
21
LT3060 Series
typical application
Paralleling of Regulators for Higher Output Current
R1
0.15Ω
VIN > 2.9V
+
IN
OUT
LT3060
C1
2.2µF
ADJ
SHDN
GND REF/BYP
C3
1nF
R2
0.15Ω
IN
OUT
R6
1.74k
1%
ADJ
SHDN
R7
604Ω
1%
GND REF/BYP
C4
1nF
R3
200Ω
R4
200Ω
3
2
+
–
R5
1k
7
LT1637
C2
4.7µF
R9
604Ω
1%
LT3060
SHDN
2.5V
200mA
R8
1.91k
1%
6
C5
10nF
4
3060 TA03
3060fa
22
LT3060 Series
Package Description
DC Package
8-Lead Plastic DFN (2mm × 2mm)
(Reference LTC DWG # 05-08-1719 Rev A)
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 × 45°
CHAMFER
(DC8) DFN 0409 REVA
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
3060fa
23
LT3060 Series
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)
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
1.95 BSC
TS8 TSOT-23 0802
3060fa
24
LT3060 Series
Revision History
REV
DATE
DESCRIPTION
PAGE NUMBER
A
07/10
Added fixed voltage options for 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and 5V
1-26
3060fa
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.
25
LT3060 Series
Typical Application
12V Low Noise Regulator
IN
VIN
13V TO
45V
1µF
OUT
2.37M
1%
LT3060
SHDN
ADJ
GND REF/BYP
CFF
10nF
124k
1%
10nF
3060 TA04
VOUT
12V AT 100mA
30µVRMS NOISE
10µF
OUTPUT VOLTAGE DEVIATION
50mV/DIV
VIN = 13V
CFF = 0
CFF = 10nF
LOAD ∆IL = 10mA TO 100mA
CURRENT
100mA/DIV
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
TIME (ms)
3060 TA04b
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, SO8 Package
LT1764/
LT1764A
3A, Fast Transient Response,
Low Noise LDO
340mV Dropout Voltage, Low Noise: 40µVRMS , VIN = 2.7V to 20V, TO-220 and DD Packages,
LT1764A Version Stable Also with Ceramic Capacitors
LT1962
300mA, Low Noise LDO
270mV Dropout Voltage, Low Noise: 20µVRMS , VIN = 1.8V to 20V, MS8 Package
LT1963/
LT1963A
1.5A Low Noise, Fast Transient
Response LDO
340mV Dropout Voltage, Low Noise: 40µVRMS , VIN = 2.5V to 20V, LT1963A Version Stable with
Ceramic Capacitors; TO-220, DD, SOT-223 and SO8 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 Capacitors; TO-220, DD-Pak, MSOP and 3mm × 3mm DFN Packages
LT3008
20mA, 45V, 3µA IQ Micropower LDO
300mV Dropout Voltage, Low IQ: 3µA, VIN = 2V to 45V, VOUT = 0.6V to 39.5V; ThinSOT and
2mm × 2mm DFN-6 Packages
280mV Dropout Voltage, Low IQ: 3µA, VIN = 1.6V to 20V, ThinSOT and SC70 Packages
LT3009
20mA, 3µA IQ Micropower LDO
LT3050
100mA, Low Noise Linear Regulator with 340mV Dropout Voltage, Low Noise: 30µVRMS , VIN: 1.6V to 45V, VOUT: 0.6V to 44.5V, Programmable Precision Current Limit: ±5%, Programmable Minimum IOUT Monitor, Output Current
Precision Current Limit and Diagnostic
Monitor, Fault Indicator, Reverse Protection; 12-Lead 2mm × 3mm DFN and MSOP Packages.
Functions.
LT3080/
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 Capacitors; TO-220, SOT-223, MSOP and 3mm × 3mm DFN
Packages; LT3080-1 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 Capacitors; MS8E and 2mm × 3mm DFN-6 Packages
LT3092
200mA 2-Terminal Programmable
Current Source
Programmable 2-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 Reverse-Voltage Protection, Reverse-Current
Protection; 8-Lead SOT-23, 3-Lead SOT-223 and 8-Lead 3mm × 3mm DFN Packages
3060fa
26 Linear Technology Corporation
LT REV A 0710 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
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 LINEAR TECHNOLOGY CORPORATION 2010