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參數(shù)資料
| 型號(hào)： | XC9509A033DR |
| 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(zhuǎn)換器，配有穩(wěn)壓器并聯(lián)穩(wěn)壓器加電壓檢測(cè)器 |
| 文件頁數(shù)： | 8/41頁 |
| 文件大?。?/td> | 3619K |
| 代理商： | XC9509A033DR |
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8/41
XC9509
Series
FOSC
L
1.2MHz
4.7
μ
H
(CDRH4D28C, SUMIDA)
10
μ
H
(CDRH5D28, SUMIDA)
22
μ
H
(CDRH6D28, SUMIDA)
600kHz
300kHz
C
IN
C
L1
C
L2
(*2)
V
ROUT
<2.0V
4.7
μ
F (ceramic, TAIYO YUDEN)
Vdif>1.0V
1.0
μ
F (ceramic, TAIYO YUDEN)
Vdif<1.0V
4.7
μ
F (ceramic, TAIYO YUDEN)
4.7
μ
F
(ceramic, TAIYO YUDEN)
10
μ
F
(ceramic, TAIYO YUDEN)
V
ROUT
>2.0V
■
TYPICAL APPLICATION CIRCUIT
MSOP-10 (TOP VIEW)
SD *1 : XB0ASB03A1BR (TOREX)
*1 The DC/DC converter of the XC9508 series automatically switches between synchronous / non-synchronous. The Schottky diode is
not normally needed. However, in cases where high efficiency is required when using the DC/DC converter during in the light load
while in non-synchronous operation, please connect a Schottky diode externally.
*2 Please be noted that the recommend value above of the CL2 may be changed depending on the input voltage value and setting voltage
value.
■
OPERATIONAL EXPLANATION
The XC9509 series consists of a synchronous step-down DC/DC converter, a high speed LDO voltage regulator, and a
voltage detector.
●
DC/DC Converter
The series consists of a reference voltage source, ramp wave circuit, error amplifier, PWM comparator, phase
compensation circuit, output voltage adjustment resistors, driver transistor, synchronous switch, current limiter circuit,
U.V.L.O. circuit and others. The series ICs compare, using the error amplifier, the voltage of the internal voltage
reference source with the feedback voltage from the V
OUT
pin through split resistors. Phase compensation is
performed on the resulting error amplifier output, to input a signal to the PWM comparator to determine the turn-on time
during PWM operation. The PWM comparator compares, in terms of voltage level, the signal from the error amplifier
with the ramp wave from the ramp wave circuit, and delivers the resulting output to the buffer driver circuit to cause the
Lx pin to output a switching duty cycle. This process is continuously performed to ensure stable output voltage. The
current feedback circuit monitors the P-channel MOS driver transistor current for each switching operation, and
modulates the error amplifier output signal to provide multiple feedback signals. This enables a stable feedback loop
even when a low ESR capacitor, such as a ceramic capacitor, is used, ensuring stable output voltage.
<Reference Voltage Source>
The reference voltage source provides the reference voltage to ensure stable output voltage of the DC/DC converter.
<Ramp Wave Circuit>
The ramp wave circuit determines switching frequency. The frequency is fixed internally and can be selected from
300kHz, 600 kHz and 1.2 MHz. Clock pulses generated in this circuit are used to produce ramp waveforms needed for
PWM operation, and to synchronize all the internal circuits.
<Error Amplifier>
The error amplifier is designed to monitor output voltage. The amplifier compares the reference voltage with the
feedback voltage divided by the internal split resistors. When a voltage lower than the reference voltage is fed back,
the output voltage of the error amplifier increases. The gain and frequency characteristics of the error amplifier output
are fixed internally to deliver an optimized signal to the mixer.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XC9509A036AL | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
| XC9509A036AR | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
| XC9509A036DL | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
| XC9509A036DR | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
| XC9509A03CAL | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XC9509A036AL | 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 |
| XC9509A036AR | 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 |
| XC9509A036DL | 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 |
| XC9509A036DR | 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 |
| XC9509A03CAL | 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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