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ACE709G bảng dữ liệu(PDF) 1 Page - ACE Technology Co., LTD.

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Giải thích chi tiết về linh kiện  0.85V Startup Voltage, Synchronous Step-Up Converter
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ACE709G
0.85V Startup Voltage, Synchronous Step-Up Converter
VER 1.1
1
Description
The ACE709G is a high efficiency synchronous step-up converter that can provide up to 3W of power
to a boosted output from a low voltage source. Unlike most step-up converter, not only it starts up at a
very low input voltage as low as 0.85V, it also incorporates circuits that disconnect the input
from
output, during shutdown, short-circuit, output current overloading, or other events when output is higher
than the input. This eliminates the need for an external MOSFET and its control circuitry to disconnect the
input from output, and provides robust output overload protection. The ACE709G starts up from a voltage
as low as 0.85V making it ideal for applications with single-cell or two-cell alkaline, NiCd, and NiMh
batteries. A switching frequency of 2MHz minimizes solution footprint by allowing the use of tiny and low
profile inductors and ceramic capacitors. An internal synchronous MOSFET provides highest efficiency
and with a current mode control that is internally compensated, external parts count is reduced to
minimal. ACE709G is available in three output voltage options. They are 2.1V~ 5V. It is housed in a tiny
SOT23-5 package
Features
 Output Disconnect
 Short-circuit Protection
 3W Output Power
 Output to Input Reversed Current Protection
 0.85V Low Start-up Voltage
 VIN range from 0.6V to 4.5V
 Up to 96% Efficiency
 40
μA No load IQ and light load PFM Mode
 Internal Synchronous Rectifier
 Current Mode control
 Logic Control Shutdown and Thermal shutdown
 SOT23-5 Package
Application
 USB OTG for MIDs, Smartphones
 Mobile back-up Battery Chargers
 Alkaline, NiCd, and NiMh batteries applications
 USB powered devices


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