製品概要
概要
The STEVAL-ISA141V1 evaluation board is based on the STBB3J fixed-frequency, high-efficiency, buck-boost DC-DC converter providing 1.2 to 5.5 V output voltages starting from a 1.8 to 5.5 V input voltage.
The device can operate with input voltages higher than, equal to, or lower than the output voltage making the product suitable for cell lithium-ion applications where the output voltage is within the battery voltage range.
The MODE pin allows selecting between auto mode and forced PWM mode, taking advantage of either a lower power consumption or the best dynamic performance.
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特徴
- Input voltage range from 1.8 V to 5.5 V
- 2 A output current at 3.3 V in buck mode (VIN = 3.6 V to 5.5 V)
- 800 mA output current at 3.3 V in boost mode (VIN 2.0 V)
- Typical efficiency higher than 94%
- ±2% DC feedback voltage tolerance
- Automatic transition between step-down and boost mode
- Adjustable output voltage from 1.2 V to 5.5 V
- Power save mode (PS) at light load
- 2.0 MHz fixed switching frequency
- Adjustable switching frequency up to 2.4 MHz (external synchronous square signal)
- Device quiescent current less than 50 µA
- Load disconnect during shutdown
- Shutdown and soft-start functions
- Shutdown current <1 A
- Available in Flip-Chip 20, pitch = 0.4 mm
- RoHS compliant
