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ACE705250BM+ bảng dữ liệu(PDF) 1 Page - ACE Technology Co., LTD.

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ACE705
                        Technology
High efficiency, Low supply current, step-up
DC/DC Controller
VER 1.2
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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