SC493
SC493 is EcoSpeed Step-down Controller manufactured by SEMTECH.
Features
- Input supply voltage range
- 3.0V to 28V
- Controller supply voltage range
- 3.0V to 5.5V
- All ceramic solution enabled
- I2C interface
- Output voltage fine adjust control
- Output voltage margining
- Supports dynamic voltage transitions via the I2C interface
- Programmable power-on delay time and soft-start time
- Eco Speed TM architecture with pseudo fixed-frequency adaptive on-time control
- Switching frequency programmable up to 1MHz
- Selectable power save, including ultrasonic
- Non-synchronous start-up into pre-biased loads
- Over-voltage/under-voltage fault protection
- Smart power save
- Power good Output
- Smart drive TM
- Status register monitoring device operation
- Ultra-thin package
- 3 x 3 x 0.6 (mm), 20 pin MLPQ-UT
- Lead-free and halogen-free
- WEEE and Ro HS pliant
Description
The SC493 is a synchronous Eco Speed TM buck power supply controller. It Features an I2C interface and a bootstrap switch in a space-saving MLPQ 3X3-20 pin package. The SC493 uses Semtech’s advanced patented adaptive on-time control architecture to provide excellent light load efficiency and fast transient response with small external ponents.
The I2C interface is used to program the output voltage offset, the power-on delay time, the soft-start time, the power save operating mode, and it can enable/disable the controller. Additionally, a status register provides information on device state and faults.
The controller is capable of operating with all ceramic solutions and switching frequencies up to 1MHz. The programmable frequency and selectable power save mode offer the flexibility to optimize the controller for high efficiency and small size.The power save mode can be enabled to maximize efficiency over the entire load range (PSAVE), or switched to ultrasonic mode to set the minimum frequency to the desired value (UPSAVE). Power save mode can be disabled for operation in continuous conduction mode at all loads.
Applications
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