Flyback controller in ThinSOT operates at 150 degrees C

Milpitas, Calif.—Linear Technology Corp. is offering an H-Grade version of the LTC3803, a current mode flyback DC/DC controller in a tiny 6-pin ThinSOT package specified from -40°C to +150°C operating junction temperature.

With its 40µA start-up and 240µA quiescent current, the device allows the use of a high-value input resistor and a low-value capacitor for low power dissipation and quick power supply start-up. The LTC3803H contains all the necessary features to design a high efficiency single-ended isolated or non-isolated flyback converter for automotive, industrial, telecom, Power-over-Ethernet and datacom requirements.

With adjustable slope compensation, an LTC3803H-based power supply achieves fast transient response with minimum output capacitance. The constant 200kHz operating frequency is maintained down to very light loads, resulting in less low frequency noise generation over a wide range of load currents. An integrated soft-start function reduces inrush current, reducing output voltage overshoot.

The LTC3803H can be powered with inputs from 9V to 75V through a series resistor clamped with the IC's internal shunt regulator, making it ideal for 4:1 input range applications. The 100mV current sense threshold enables the use of a very small current sense resistor even at high power levels, ensuring high efficiency.

Pricing: Starts at $1.63 each in 1,000-piece quantities.
Availability: Now.
Datasheet: click here.

Linear Technology Corp.,

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