FEATURES
s s s s s s s s s s DESCRIPTIO s s Low Start-Up Current: < 250µA 50ns Current Sense Delay Current Mode Operation: To 500kHz Pin Compatible with UC1842 Series Undervoltage Lockout with Hysteresis No Cross-Conduction Current Trimmed Bandgap Reference 1A Totem Pole Output Trimmed Oscillator Frequency and Sink Current Active Pull-Down on Reference and Output During Undervoltage Lockout High Level Output Clamp: 18V Current Sense Leading Edge Blanking APPLICATI s s S Off-Line Converters DC/DC Converters , LTC and LT are registered trademarks of Linear Technology Corporation. The LT ®1241 series devices are 8-pin, fixed frequency, current mode, pulse width modulators. They are improved plug compatible versions of the industry standard UC1842 series. These devices have both improved speed and lower quiescent current. Start-up current has been reduced to less than 250µA. Cross-conduction current spikes in the output stage have been eliminated, making 500kHz operation practical. Several new features have been incorporated.
Linear Technology
