The LT3048 series generate low noise, low ripple bias supplies from input voltages of 2.7V to 4.8V.
The LT3048 includes a boost regulator and a LDO linear regulator. The boost regulator provides power to the linear regulator.
The boost regulator output voltage is regulated to 1.1V above the LDO output, optimizing LDO ripple rejection and transient response. Fixed frequency operation and current mode control allow the use of very small inductors and results in low, predictable output ripple.
The linear regulator in the LT3048 generates a programmable output and the LT3048-XX generate fixed output voltages. High power supply ripple rejection combined with a low noise internal reference results in less than 500μVP-P output ripple and noise.
The LT3048 is available in a 8-lead 2mm × 2mm DFN package.
Feature
- Generates Low Noise Bias Voltage from Single Cell Li-Ion Battery
- Output Current: Up to 40mA
- Low Output Ripple and Noise: <500μVP-P
- Boost Regulator
- 1MHz Operation (LT3048)
- 2.2MHz Operation (LT3048-XX)
- Integrated Schottky Diode
- Low Dropout Linear Regulator
- 1.235V Feedback Voltage (LT3048)
- Low Noise: <120μVRMS (10Hz to 100kHz)
- 0.1% Load Regulation
- Fixed 3.3V, 5V, 12V, 15V and Adjustable Output Options
- Short-Circuit and Thermal Protection
- Load Disconnect in Shutdown
- Available in 2mm × 2mm DFN Package
Applications
- Sensor Bias
- Op Amp Supply
