Datasheet LT3066 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | 45V VIN, 500mA Low Noise, Linear Regulator with Programmable Current Limit and Active Output Discharge |
| Páginas / Página | 26 / 1 — FEATURES. DESCRIPTION. Input Voltage Range: 1.6V to 45V. Output Current: … |
| Revisión | B |
| Formato / tamaño de archivo | PDF / 2.0 Mb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTION. Input Voltage Range: 1.6V to 45V. Output Current: 500mA. Active Output Discharge. Dropout Voltage: 300mV
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Versión de texto del documento
LT3066 Series 45V VIN, 500mA Low Noise, Linear Regulator with Programmable Current Limit and Active Output Discharge
FEATURES DESCRIPTION
n
Input Voltage Range: 1.6V to 45V
The LT®3066 series are micropower, low noise, low dropout n
Output Current: 500mA
voltage (LDO) linear regulators that operate over a 1.6V n
Active Output Discharge
to 45V input voltage range. The devices supply 500mA of n
Dropout Voltage: 300mV
output current with a typical dropout voltage of 300mV. A n
Programmable Precision Current Limit: ±10%
single external capacitor provides programmable low noise n
Power Good Flag
reference performance and output soft-start functionality. n
Input Filtering for High PSRR
A single external resistor programs the LT3066’s current n
Low Noise: 25µVRMS (10Hz to 100kHz)
limit, accurate to ±10% over a wide input voltage and tem- n Adjustable Output (VREF = VOUT(MIN) = 600mV) perature range. A PWRGD flag indicates output regulation. n Output Tolerance: ±2% Over Line, Load and Temperature n Stable with Low ESR, Ceramic Output Capacitors The LT3066 features an NMOS pull-down that discharges (3.3µF Minimum) the output if SHDN or IN is driven low. n 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 n Current Limit Foldback Protection 3.3µF. Internal protection circuitry includes current limiting n Shutdown Current: <3µA with foldback, thermal limiting, reverse battery protection, n Reverse Battery and Thermal Limit Protection reverse current protection and reverse output protection. n 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 n Battery-Powered Systems thermal y-enhanced 12-lead 4mm × 3mm DFN and MSOP n Automotive Power Supplies packages. n Industrial Power Supplies All registered trademarks and trademarks are the property of their respective owners. Protected n Avionic Power Supplies by U.S. Patents, including 8159278. n Portable Instruments
TYPICAL APPLICATION Output Discharge vs VOUT 3.3V Supply with 497mA Precision Current Limit CREF/BYP = 1nF
IN IN OUT OUT 5.0V 5V 10µF 3.3V SHDN SENSE 10µF 500mA 500k 3.3V INFILT 0.47µF 1V/DIV 2.0V LT3066-3.3 1.2V PWRGD SHDN: 0 TO 2V IMAX REF/BYP GND 604Ω 3066 TA01b 22nF 1nF 1ms/DIV 3066 TA01a VIN = VOUT +1V COUT = 10µF IFB-DIVIDER = 10µA Rev. B Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
FEATURES DESCRIPTION
n
Input Voltage Range: 1.6V to 45V
The LT®3066 series are micropower, low noise, low dropout n
Output Current: 500mA
voltage (LDO) linear regulators that operate over a 1.6V n
Active Output Discharge
to 45V input voltage range. The devices supply 500mA of n
Dropout Voltage: 300mV
output current with a typical dropout voltage of 300mV. A n
Programmable Precision Current Limit: ±10%
single external capacitor provides programmable low noise n
Power Good Flag
reference performance and output soft-start functionality. n
Input Filtering for High PSRR
A single external resistor programs the LT3066’s current n
Low Noise: 25µVRMS (10Hz to 100kHz)
limit, accurate to ±10% over a wide input voltage and tem- n Adjustable Output (VREF = VOUT(MIN) = 600mV) perature range. A PWRGD flag indicates output regulation. n Output Tolerance: ±2% Over Line, Load and Temperature n Stable with Low ESR, Ceramic Output Capacitors The LT3066 features an NMOS pull-down that discharges (3.3µF Minimum) the output if SHDN or IN is driven low. n 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 n Current Limit Foldback Protection 3.3µF. Internal protection circuitry includes current limiting n Shutdown Current: <3µA with foldback, thermal limiting, reverse battery protection, n Reverse Battery and Thermal Limit Protection reverse current protection and reverse output protection. n 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 n Battery-Powered Systems thermal y-enhanced 12-lead 4mm × 3mm DFN and MSOP n Automotive Power Supplies packages. n Industrial Power Supplies All registered trademarks and trademarks are the property of their respective owners. Protected n Avionic Power Supplies by U.S. Patents, including 8159278. n Portable Instruments
TYPICAL APPLICATION Output Discharge vs VOUT 3.3V Supply with 497mA Precision Current Limit CREF/BYP = 1nF
IN IN OUT OUT 5.0V 5V 10µF 3.3V SHDN SENSE 10µF 500mA 500k 3.3V INFILT 0.47µF 1V/DIV 2.0V LT3066-3.3 1.2V PWRGD SHDN: 0 TO 2V IMAX REF/BYP GND 604Ω 3066 TA01b 22nF 1nF 1ms/DIV 3066 TA01a VIN = VOUT +1V COUT = 10µF IFB-DIVIDER = 10µA Rev. B Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts