Fairchild Semiconductor ILC6390
The ILC6390 automatically senses load variations to choose between 55% and 75% duty cycles. Requiring only 30µA of supply current, the ILC6390 achieves efficiencies as high as 85% at 5V yet shuts down to 0.5µA max.| Part No. | ILC6390 |
|---|---|
| Datasheet | ILC6390 Download |
| Manufacturer |  Fairchild Semiconductor |
| Description | SOT-89 Step-Up PFM Switcher |
| Buy | Stock & Price |
FEATURES
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● 85% conversion efficiency at 50mA out Start-up voltages as low as 900mV ±2.5% accurate outputs Complete switch design with only 3 external components Automatically senses load variations to select the optimal duty cycle and extend conversion efficiency over a wide range
● External transistor configuration to run as switcher controller
● Shutdown to 0.5µA
DESCRIPTION
50 mA boost converter using Pulse Frequency Modulation, or PFM, technique, in 5-lead SOT-89 or a 5-lead SOT-23 package. Only 3 external components are needed to complete the switcher design. Normal operation is 55% duty at 155kHz; when load currents exceed the internal comparator trip point, a “turbo mode” kicks in to provide extended on-time switching (75% duty at 100kHz oscillation). Standard voltages offered are 2.5, 3.3, and 5.0V and is available in both a 5 lead SOT-23 and 5 lead SOT-89 package for small footprint applications. In addition, the ILC6391 is configured to drive an external transistor to achieve higher power levels.
