Rohm Semiconductor BD9901x DC/DC converters feature ultra-low Iq step-down DC/DC converters with integrated power MOSFETs for 3.3V and 5V voltage output. The BD9901x features simple light load mode (SLLM) control to ensure an ultra low quiescent current and high efficiency at low load situations while maintaining a regulated output voltage. The BD9901x is compliant with automotive standards and accommodates a maximum voltage of 42V. The minimum input voltage of 3.6V sustains output at cold cranking conditions. The current mode regulation loop gives a fast transient response and easy phase compensation. The BD9901x is available in a HTSSOP-B24 package, and delivers a small PCB footprint.
Feature
- Low Quiescent Operating Current: 22uA
- Simple Light Load Mode (SLLM)
- Supports Cold Cranking Down to 3.6V
- Output Voltage Accuracy: ±2%
- Synchronous Rectifier
- Soft Start
- Chip Enable pin compatible with CMOS logic and battery voltages
- Forced PMW Mode Function
- Current Mode Control with External Compensation Circuit
- Over Current Protection, Short Circuit Protection, Over Voltage Protection for VOUT, Under Voltage Lock Out for VIN and Thermal Protection Circuits