The LT3495 uses a 650mA switch whereas the LT3495-1 uses a 350mA switch. Both parts are packaged in a 2mm x 3mm DFN-10 package. Their wide 2.3V to 16V input voltage range enables them to operate from single cell Li-Ion batteries up to fixed 12V input rails, delivering outputs up to 40V.
The LT3495 can deliver over 70mA of output current at 16V from a single Li-Ion cell, making it ideal for applications such as OLED displays. Both parts use a unique control technique that delivers both high efficiency and low output ripple over a wide load current range. This technique guarantees that the switching frequency stays above the audio band for the entire load range, making it ideal for noise-sensitive PMP and audio applications. The combination of the LT3495/-1’s 2mm x 3mm DFN package and tiny, low cost ceramic capacitors and inductors provides a very compact solution footprint.
The LT3495’s NPN switch achieves a VCESAT of only 250mV at 500mA and offers efficiencies as high as 85%. The device’s low 60uA of quiescent current (<1uA in shutdown) maximizes battery run time, while integrated Schottky diodes and output disconnect circuitry minimizes external circuitry. Finally, an integrated dimming/contrast adjustment function is included for display applications.
|Summary of Features: LT3495/-1/B/B-1|
|Low Quiescent Current|
|60uA in Active Mode|
|0.1uA in Shutdown Mode|
|Low Noise Control Scheme (Switching Frequency Always |
Stays Above Audible Range for LT3495/-1)
|Integrated Power NPN|
|650mA Current Limit (LT3495/B)|
|350mA Current Limit (LT3495-1/B-1)|
|Integrated Schottky Diode|
|Integrated Output Disconnect|
|Integrated Output Dimming|
|Wide input Range: 2.3V to 16V|
|Wide output Range: up to 40V|
|Integrated Feedback Resistor|
|Tiny 10-Lead 3mm × 2mm DFN Package|