HT7991

HT7991 2.5A Peak Current, 1MHz Asynchronous Step-up PWM Converter Features Input Voltage from 2.6V to 5.5V Adjustable Output Voltage Up to 12V Internal 0.2Ω Low Power Switch Fixed PWM Switching Frequency: 1MHz Precision Feedback Reference Voltage: 0.6V (±2%) Ultra Low Shutdown Current: 0.1μA Embedded Loop Frequency Compensation Programmable OCP Threshold via External Resistor, ROC Complete Protections: Soft Start , UVLO, OCP, OTP and OVP Package Type: SOT23-6 Applications All Single Cell Li or Dual Cell Battery Application Portable Equipment/Handheld Devices General Description The HT7991 is a current mode asynchronous stepup DC-DC converter. The fully integrated power MOSFET transistor, with its 0.2Ω drain source resistance, ensures a high level of device power efficiency. A fixed 1MHz switching frequency has been chosen to permit smaller inductors to be used in the application circuit. The error amplifier noninverting ...