The HT7737B is a DC-DC converter step-up fixed 1.0V to 5V with 3.7V, 100mA current and SOT23-5 package size. It is RoHS compliant manufactured by Holtek. This part uses advanced technologies to achieve a high efficiency up to 94%, allowing good heat dissipation. For safety, it also features built-in over-voltage, over-current, and short-circuit protection. Its operating temperature range is -40°C to +85°C. It comes with a MTBF of more than 1,000,000 hrs. It is suitable for a wide range of applications such as industrial equipment, LED lighting, and poer supplies.