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參數資料
| 型號： | XC9511D1433 |
| 廠商： | TOREX SEMICONDUCTOR LTD. |
| 英文描述： | Synchronous Step-Down DC/DC Converter with built-in LDO Regulator in parallel plus Voltage Detector |
| 中文描述： | 同步降壓型DC / DC轉換器內置LDO的同時加電壓檢測器調節(jié)器 |
| 文件頁數： | 10/35頁 |
| 文件大?。?/td> | 3471K |
| 代理商： | XC9511D1433 |
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10/35
XC9511
Series
.
<U.V.L.O. Circuit>
When the V
IN
pin voltage becomes 1.4 V or lower, the P-channel output driver transistor is forced OFF to prevent false
pulse output caused by unstable operation of the internal circuitry. When the V
IN
pin voltage becomes 1.8 V or higher,
switching operation takes place. By releasing the U.V.L.O. function, the IC performs the soft start function to initiate
output startup operation. The soft start function operates even when the V
IN
pin voltage falls momentarily below the
U.V.L.O. operating voltage. The U.V.L.O. circuit does not cause a complete shutdown of the IC, but causes pulse
output to be suspended; therefore, the internal circuitry remains in operation.
●
High Speed LDO Voltage Regulator
The voltage regulator block of the XC9511 series consists of a reference voltage source, error amplifier, and current
limiter circuit. The voltage divided by split resistors is compared with the internal reference voltage by the error amplifier.
The P-channel MOSFET, which is connected to the V
ROUT
pin, is then driven by the subsequent output signal. The
output voltage at the V
ROUT
pin is controlled and stabilized by a system of negative feedback. A stable output voltage is
achievable even if used with low ESR capacitors as a phase compensation circuit is built-in.
<Reference Voltage Source>
The reference voltage source provides the reference voltage to ensure stable output voltage of the regulator.
<Error Amplifier>
The error amplifier compares the reference voltage with the signal from V
OUT
, and the amplifier controls the output of the
Pch driver transistor.
<Current Limit Circuit>
The voltage regulator block includes a combination of a constant current limiter circuit and a foldback circuit. The
voltage regulator senses output current of the built-in P channel output driver transistor inside. When the load current
reaches the current limit level, the current limiter circuit operates and the output voltage of the voltage regulator block
drops. As a result of this drop in output voltage, the foldback circuit operates, output voltage drops further and the load
current decreases. When the V
ROUT
and GND pin are shorted, the load current of about 30mA flows.
■
OPERATIONAL EXPLANATION (Continued)
●
Voltage Detector
The detector block of the XC9511 series detects output voltage from the V
DOUT
pin while sensing either V
DD
, D
COUT
, or
VR
OUT
internally. (N channel Open Drain Type)
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相關代理商/技術參數 |
參數描述 |
|---|---|
| XC9511D1434 | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with built-in LDO Regulator in parallel plus Voltage Detector |
| XC9511D143SRL | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with built-in LDO Regulator in parallel plus Voltage Detector |
| XC9511D1463 | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with built-in LDO Regulator in parallel plus Voltage Detector |
| XC9511D1464 | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with built-in LDO Regulator in parallel plus Voltage Detector |
| XC9511D146SRL | 制造商:TOREX 制造商全稱:Torex Semiconductor 功能描述:Synchronous Step-Down DC/DC Converter with built-in LDO Regulator in parallel plus Voltage Detector |
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