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ACE705253BM+ bảng dữ liệu(PDF) 1 Page - ACE Technology Co., LTD. |
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ACE705253BM+ bảng dữ liệu(HTML) 1 Page - ACE Technology Co., LTD. |
1 / 14 page ACE705 Technology High efficiency, Low supply current, step-up DC/DC Controller VER 1.2 1 Description The ACE705 series are CMOS-based PFM step-up DC-DC Controller with low supply current and high output voltage accuracy. Quiescent current drawn from power source is as low as 6uA. It is capable of delivering 500mA output current at 4.0V output with 2V input Voltage. Only four external components are necessary: An inductor, a Schottky diode, an output filter capacitor and a NMOSFET or a NPN transistor All of these features make ACE705 series be suitable for the portable devices, which are supplied by a single battery to four-cell batteries. ACE705 has a drive pin (EXT) for external transistor. So it is possible to load a large output current with a power transistor which has a low saturation voltage. ACE705 integrates stable reference circuits and trimming technology, so it can afford high precision and low temperature-drift coefficient of the output voltage. ACE705 is available in SOT-23-3 and SOT-23-5 packages which are PB free. And in SOT-23-5 the device can be switch on or off easily by CE pin, to minimize the standby supply current. Features • Deliver 500mA at 4.0V Output voltage with 2.0V input Voltage • The converter output voltage can be adjusted from 2.5V~6.0V(In 0.1V step) • Output voltage accuracy -----------±2% • Low temperature-drift coefficient of the output voltage------------------±100ppm/℃ • Only four external components are necessary: An inductor, a Schottky diode an output filter capacitor and a NMOSFET or a NPN transistor • High power conversion efficiency---90% • Low quiescent current drawn from power source------------------------------------- 6uA Application • Power source for PDA. DSC. MP3 Player. electronic toy and wireless mouse • Power source for a single or dual-cell battery-powered equipments • Power source for LED Absolute Maximum Ratings Parameter Symbol Max Unit Input voltage range -0.3~12 V Input voltage V(EXT) -0.3~Vout+0.3 V CE pin voltage -0.3~Vout+0.3 V EXT pin output current 0.7 A Maximum power dissipation, Pd T=25℃ SOT-23-5 SOT-23-3 0.25 0.15 W Maximum junction temperature 150 ℃ Operating free-air temperature range -20~80 ℃ Storage temperature range -40~125 ℃ |
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Mô tả tương tự - ACE705253BM+ |
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