45V VIN, Micropower, Low Noise, 100mA LDO with Active Output Discharge
45V VIN, Micropower, Low Noise, 200mA LDO with Active Output Discharge
Features and Benefits
- Input Voltage Range: 1.8V to 45V
- Output Current: 500mA
- Active Output Discharge
- Dropout Voltage: 300mV
- Programmable Precision Current Limit: ±10%
- Power Good Flag
- Input Filtering for High PSRR
- Low Noise: 25μVRMS (10Hz to 100kHz)
- Adjustable Output (VREF = VOUT(MIN) = 600mV)
- Output Tolerance: ±2% Over Line, Load and Temperature
- Stable with Low ESR, Ceramic Output Capacitors (3.3μF Minimum)
- Single Capacitor Soft-Starts Reference and Lowers Output Noise
- Current Limit Foldback Protection
- Shutdown Current: <3μA
- Reverse Battery and Thermal Limit Protection
- 12-Lead 4mm × 3mm DFN and 12-lead MSOP Packages
The LT3066 series are micropower, low noise, low dropout voltage (LDO) linear regulators that operate over a 1.8V to 45V input voltage range. The devices supply 500mA 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.
A single external resistor programs the LT3066’s current limit, accurate to ±10% over a wide input voltage and temperature range. A PWRGD flag indicates output regulation.
The LT3066 features an NMOS pull-down that discharges the output if SHDN or IN is driven low.
The LT3066 optimizes stability and transient response with low ESR ceramic capacitors, requiring a minimum of 3.3μF. Internal protection circuitry includes current limiting with foldback, thermal limiting, reverse battery protection, reverse current protection and reverse output protection.
The LT3066 is available in fixed output voltages of 3.3V and 5V, and as an adjustable device with an output voltage range from 0.6V to 19V. The device is offered in the thermally-enhanced 12-lead 4mm × 3mm DFN and MSOP packages.
- Battery-Powered Systems
- Automotive Power Supplies
- Industrial Power Supplies
- Avionic Power Supplies
- Portable Instruments
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Demonstration circuit 2437A is an adjustable 500mA linear regulator featuring the LT3066. The LT3066 is a micropower, low noise and low dropout voltage linear regulator that operates over a 1.8V to 45V input voltage range. The device supplies 500mA of output current with a typical dropout voltage of 300mV. Jumper-selectable output voltages include 1.2V, 1.5V, 1.8V, 2.0V, 2.5V, 3.3V and 5V. A 10nF bypass capacitor reduces output noise to 25μVRMS across a 10Hz to 100kHz bandwidth and soft-starts the reference. The LT3066’s ±45V input voltage rating combined with its precision current limit make the IC an ideal choice for robust, high reliability applications. LT3066 features an NMOS pull-down that discharges the output if SHDN or IN is driven low.
Documentation & Resources
R531 Reliability Data3/26/201823 K
DC2437A - Demo Manual3/11/2016205K
Linear Low Dropout (LDO) Regulator Solutions4/17/20183 M
Tools & Simulations
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LT3066 Companion Parts
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.