LT3066 Series
45V V , 500mA Low Noise,
IN
Linear Regulator with Programmable
Current Limit and Active Output Discharge
FEATURES DESCRIPTION
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Input Voltage Range: 1.6V to 45V The LT 3066 series are micropower, low noise, low dropout
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Output Current: 500mA voltage (LDO) linear regulators that operate over a 1.6V
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Active Output Discharge to 45V input voltage range. The devices supply 500mA of
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Dropout Voltage: 300mV output current with a typical dropout voltage of 300mV. A
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Programmable Precision Current Limit: 10% single external capacitor provides programmable low noise
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Power Good Flag reference performance and output soft-start functionality.
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Input Filtering for High PSRR
A single external resistor programs the LT3066s current
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Low Noise: 25V (10Hz to 100kHz)
RMS
limit, accurate to 10% over a wide input voltage and tem-
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Adjustable Output (V = V = 600mV)
REF OUT(MIN)
perature range. A PWRGD flag indicates output regulation.
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Output Tolerance: 2% Over Line, Load and Temperature
n The LT3066 features an NMOS pull-down that discharges
Stable with Low ESR, Ceramic Output Capacitors
the output if SHDN or IN is driven low.
(3.3F Minimum)
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Single Capacitor Soft-Starts Reference and Lowers
The LT3066 optimizes stability and transient response
Output Noise
with low ESR ceramic capacitors, requiring a minimum of
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Current Limit Foldback Protection
3.3F. Internal protection circuitry includes current limiting
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Shutdown Current: <3A
with foldback, thermal limiting, reverse battery protection,
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Reverse Battery and Thermal Limit Protection
reverse current protection and reverse output protection.
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12-Lead 4mm 3mm DFN and 12-lead MSOP Packages
The LT3066 is available in fixed output voltages of 3.3V
and 5V, and as an adjustable device with an output volt-
APPLICATIONS
age range from 0.6V to 19V. The device is offered in the
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Battery-Powered Systems
thermally-enhanced 12-lead 4mm 3mm DFN and MSOP
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Automotive Power Supplies
packages.
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Industrial Power Supplies
All registered trademarks and trademarks are the property of their respective owners. Protected
n by U.S. Patents, including 8159278.
Avionic Power Supplies
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Portable Instruments
TYPICAL APPLICATION
Output Discharge vs V
OUT
C = 1nF
3.3V Supply with 497mA Precision Current Limit REF/BYP
IN OUT
IN OUT
5.0V
5V 3.3V
10F 10F
SHDN SENSE
500mA
3.3V
500k
INFILT
1V/DIV
0.47F 2.0V
LT3066-3.3
1.2V
PWRGD
SHDN: 0 TO 2V
I
REF/BYP
MAX
GND
3066 TA01b
604 1ms/DIV
22nF
1nF
3066 TA01a
V = V +1V
IN OUT
C = 10F
OUT
I = 10A
FB-DIVIDER
Rev. B
1
Document Feedback For more information www.analog.comLT3066 Series
ABSOLUTE MAXIMUM RATINGS (Note 1)
IN Pin Voltage .........................................................50V SENSE Pin Voltage ..................................................50V
OUT Pin Voltage .............................................. +20V, 1V Output Short-Circuit Duration .......................... Indefinite
Input-to-Output Differential Voltage (Note 2) ............ 50V Operating Junction Temperature Range (Notes 3, 5, 14)
ADJ Pin Voltage ......................................................50V E-, I-Grades ....................................... 40C to 125C
SHDN Pin Voltage ...................................................50V Storage Temperature Range .................. 65C to 150C
PWRGD Pin Voltage .......................................0.3V, 50V Lead Temperature (Soldering, 10 sec)
INFILT Pin Voltage (Note 15) ...................................50V MSOP Package Only .........................................300C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
INFILT 1 12 OUT
INFILT 1 12 OUT
IN 2 11 OUT
IN 2 11 OUT
IN 3 10 NC/SENSE*
13 IN 3 10 NC/SENSE*
13
GND
SHDN 4 GND 9 ADJ
SHDN 4 9 ADJ
PWRGD 5 8 GND
PWRGD 5 8 GND
I 6 7 REF/BYP
MAX
I 6 7 REF/BYP
MAX
MSE PACKAGE
12-LEAD PLASTIC MSOP
DE PACKAGE
T = 150C, = 34C/W, = 6C/W
JMAX JA JC
12-LEAD (4mm 3mm) PLASTIC DFN
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
T = 150C, = 34C/W, = 5C/W
JMAX JA JC
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
*Pin 10: NC for LT3066, SENSE for LT3066-3.3, LT3066-5
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3066EDE#PBF LT3066EDE#TRPBF 3066 12-Lead (4mm x 3mm) Plastic DFN 40C to 125C
LT3066IDE#PBF LT3066IDE#TRPBF 3066 12-Lead (4mm x 3mm) Plastic DFN 40C to 125C
LT3066EDE-3.3#PBF LT3066EDE-3.3#TRPBF 06633 12-Lead (4mm x 3mm) Plastic DFN 40C to 125C
LT3066IDE-3.3#PBF LT3066IDE-3.3#TRPBF 06633 12-Lead (4mm x 3mm) Plastic DFN 40C to 125C
LT3066EDE-5#PBF LT3066EDE-5#TRPBF 30665 12-Lead (4mm x 3mm) Plastic DFN 40C to 125C
LT3066IDE-5#PBF LT3066IDE-5#TRPBF 30665 12-Lead (4mm x 3mm) Plastic DFN 40C to 125C
LT3066EMSE#PBF LT3066EMSE#TRPBF 3066 12-Lead Plastic MSOP 40C to 125C
LT3066IMSE#PBF LT3066IMSE#TRPBF 3066 12-Lead Plastic MSOP 40C to 125C
LT3066EMSE-3.3#PBF LT3066EMSE-3.3#TRPBF 306633 12-Lead Plastic MSOP 40C to 125C
LT3066IMSE-3.3#PBF LT3066IMSE-3.3#TRPBF 306633 12-Lead Plastic MSOP 40C to 125C
LT3066EMSE-5#PBF LT3066EMSE-5#TRPBF 30665 12-Lead Plastic MSOP 40C to 125C
LT3066IMSE-5#PBF LT3066IMSE-5#TRPBF 30665 12-Lead Plastic MSOP 40C to 125C
Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
Rev. B
2
For more information www.analog.com