特点
Tiny Solution Size
Low Quiescent Current
?25μA in Active Mode
?0.5μA in Shutdown Mode
Internal 115mA, 36V Switch
Integrated Schottky Diode
Integrated PNP Output Disconnect with Short-Circuit Protection
Internal Reference Override Pin
16V at 8mA from 3.6V Input
12V at 20mA from 5V Input
Input Range: 2.3V to 10V
High Output Voltage: Up to 34V
Low Profile (1mm) SOT-23 Package
典型应用
典型应用
描述
The LT?3464 is a micropower step-up DC/DC converter with integrated Schottky diode and output disconnect packaged in an 8-lead low profile (1mm) SOT-23. The small package size, high level of integration, and the use of tiny SMT components yield a solution size of less than 40mm2. The LT3464 has a typical current limit of 115mA as well as fast switching speed to allow the use of a chip inductor and small ceramic capacitors. The internal PNP disconnects the output load from the input during shutdown, and also provides output short-circuit protection. An auxiliary reference input allows the user to override the internal 1.25V feedback reference with any lower value, allowing full control of the output voltage during operation. This device features a low 25μA quiescent current, which is further reduced to less than 0.5μA in shutdown. A current limited fixed off-time control scheme conserves operating current, resulting in high efficiency over a broad range of operating current. The rugged 36V switch and output disconnect circuitry allow outputs up to 34V to be easily generated in a simple boost topology.