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HT7936B Datasheet(PDF) 1 Page - Holtek Semiconductor Inc |
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HT7936B Datasheet(HTML) 1 Page - Holtek Semiconductor Inc |
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1 / 16 page  HT7936A/HT7936B White LED Step-up Charge Pump Converter Selection Table Part No. Output Voltage Tolerance Package HT7936A 5.0V ±4% SOT23-6 HT7936B 4.5V ±4% SOT23-6 Rev 1.00 1 December 28, 2009 Features · Input voltage range: 2.8V to VOUT · Driving current: 110mA (HT7936A), 150mA (HT7936B) · Fixed output voltage: 5V (HT7936A), 4.5V (HT7936B) · Oscillator frequency: 1MHz · Soft start function, current limit, short circuit protection · Small outline SOT23-6 package Applications · Cellular phones · PDAs · DSCs · Handheld devices · White LED display backlighting General Description The HT7936A and HT7936B are charge-pump type DC-DC step-up converter devices, which can generate regulated fixed output voltages of 5.0V and 4.5V. Their high degree of functional integration requires only the addition of three external capacitors, namely a flying ca- pacitor and an input and output capacitor, to implement a full step-up conversion function. The devices have the additional benefit of an integrated soft start function to reduce the level of in-rush current during device power on. The operating voltage range is from 2.8V to the full output voltage value, VOUT. To meet the demands of today ¢s power sensitive appli- cations, the devices, have a very low standby current value as well as the extra safety features of current limit and short circuit protection. This range of device fea- tures, supplied in 6-pin SOT-23-6 package type, will en- sure that these device will find excellent use in a wide range of DC-DC step-up converter applications. |
Similar Part No. - HT7936B |
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Similar Description - HT7936B |
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