45-V input 100-mA LDO offers low noise and output down to 0.6-V

Linear Technology Corporation has introduced a high voltage, low noise, low dropout voltage linear regulator that delivers up to 100 mA continuous output current with a 300 mV dropout voltage at full load.

The LT3060 features a wide input voltage range of 1.6 V to 45 V, delivering adjustable output voltages from 0.6 V to 44.5 V. A single capacitor provides both programmable ultra-low noise operation - only 30 μVRMS across a wide bandwidth of 10 Hz to 100 kHz - and reference soft start functionality, preventing output voltage overshoot at turn-on. The LT3060's output voltage tolerance is highly accurate at ±2 percent over line, load and temperature. The IC's wide input and output voltage ranges, fast transient response, low quiescent current of 40μA (operating) and <1μA (in shutdown) make it an suitable choice for portable battery-powered systems that require optimum run time, and usage in automotive, industrial and avionic power supply applications.

The LT3060 operates with a very small, low cost, ceramic output capacitor, optimizing stability and transient response. The device is stable with only a 2.2μF output capacitor. These tiny external capacitors can be used without the necessary addition of series resistance (ESR) as is common with many other regulators. The LT3060's internal protection circuitry includes reverse-battery protection, reverse-output protection, reverse-current protection, current limit with foldback and thermal limiting.

Summary of Features: LT3060

• Output Current: 100 mA

• Low Dropout Voltage: 300 mV

• Low Noise: 30 μVRMS (10 Hz to 100 kHz)

• Low Quiescent Current: 40 μA

• Wide Input Voltage Range: 1.6 V to 45 V

• Adjustable Output Voltage: 0.6 V to 44.5 V

• Output Tolerance: ±2 percent Over Load, Line and Temperature

• Single Capacitor Soft-Starts Reference and Lowers

• Output Noise

• Stable with 2.2 μF Ceramic Capacitors

• Low Shutdown Current <1 μA

• Reverse Battery, Reverse-Output and Reverse-Current Protection

• Thermal Limiting and Current Limiting with Foldback

• 2 mm x 2 mm DFN-8 and 8-Lead ThinSOT Packages

Availability and Pricing

The LT3060EDC, LT3060IDC, LT3060ETS8 and LT3060ITS8 are housed in 8-lead 2 mm x 2 mm DFN and 8-lead ThinSOT packages, respectively, offering a compact footprint. The "E" and "I" grade versions are available from stock with an operating junction temperature of -40 to +125 degrees C and are priced at $1.21 and $1.33 each, respectively. The LT3060HTS8 "H" grade and LT3060MPTS8 "MP" grade are available from stock and offered in the ThinSOT package, with respective operating junction temperatures of -40 to +150 degrees C and -55 to +125 degrees C, and are priced at $1.67 and $4.34 each, respectively.

Datasheet:

LT3060