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HT7991 Datasheet

Part Number HT7991
Manufacturers Holtek Semiconductor
Logo Holtek Semiconductor
Description 1MHz Asynchronous Step-up PWM Converter
Datasheet HT7991 DatasheetHT7991 Datasheet (PDF)

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 Appl.

  HT7991   HT7991






1MHz Asynchronous Step-up PWM Converter

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 .


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