Linear
Technology Corp. announced high reliability military temperature (MP) grade
versions of the LTC3803/-3/-5 current mode flyback
controllers in the tiny 6-pin ThinSOTa" cent package. These devices are specified and
are 100% production tested over a junction temperature range of -55 to 150C.
The input and output voltage ranges of LTC3803/-3/-5-based power supplies are
limited only by external components, enabling wide-input-voltage and
high-input-voltage applications commonly found in industrial, telecom, military
and automotive settings.
The constant
200 or 300kHz operating frequency is maintained down to very light loads,
minimizing low frequency noise generation over a wide range of load current. An
integrated soft-start function reduces inrush current and output voltage
overshoot. A 100mV current sense threshold allows the use of a small current
sense resistor to maintain high efficiency. An LTC3803/-3/-5-based power supply
does not require any minimum output load for stable operation. An internal
shunt regulator allows the LTC3803/-3/-5 to be powered simply from a high input
voltage through a series resistor. In wide-Vin-range applications where this
isn't feasible, the LTC3803 and LTC3803-3 feature a wide hysteresis
undervoltage lockout that enables efficiency-enhancing micropower startup and
bootstrap biasing techniques.
All devices are available from stock. Pricing
for the LTC3803/-3/-5MP starts at $3.95 each for 1,000 piece quantities.
