First Micropower Boost Converter

Linear Technology announces the LT3464, a high efficiency, micropower boost converter with an integrated Schottky diode and output disconnect transistor. The LT3464 utilizes a current limited, constant off-time switching topology with an 85mA internal switch to deliver output voltages up to 34V. It can deliver up to 8mA at 16V from a 3.6V input, making it ideal for biasing applications in handheld devices. The LT3464 input voltage range of 2.3V to 10V makes it suitable for single- or dual-cell Li-Ion batteries as well as multi-cell Alkaline or NiMH chemistries. A low-profile ThinSOT?package and minimal externals make it well suited for space-constrained applications.

The LT3464 small package size, high level of integration and use of tiny surface mount components yields a solution size of less than 40mm? The internal Schottky diode reduces both size and assembly requirements while the internal PNP transistor disconnects the output load from the input during shutdown and 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 for full control of the output voltage during operation. Burst Mode?operation enables an ultra-low supply current of 25, while shutdown current is less than 0.5. The LT3464 is ideal for applications that require up to 34V from the smallest form factor available.

The LT3464 is available from stock in an 8-lead ThinSOT package. Pricing starts at $1.50 each in 1,000-piece quantities.

Summary of Features: LT3464
Integrated Schottky Diode
Integrated PNP Output Disconnect with Short-Circuit Protection
85mA Internal Switch Current
Low Quiescent Current: 25礎 (0.5礎 in Shutdown)
Input Voltage Range: 2.3V to 10V
High Output Voltage: Up to 34V
Low VCESAT Switch (190mV at 80mA)
Internal-Reference Override Pin
Dropout Operation: 100% Duty Cycle
Automatic Burst Mode Operation
Low Profile (1mm) ThinSOT Package