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參數(shù)資料
| 型號： | XC9508_1 |
| 廠商： | TOREX SEMICONDUCTOR LTD. |
| 英文描述： | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Series Plus Voltage Detector |
| 中文描述： | 同步降壓型DC / DC轉(zhuǎn)換器，配有穩(wěn)壓器在系列脈沖電壓檢測器調(diào)節(jié)器 |
| 文件頁數(shù)： | 11/38頁 |
| 文件大?。?/td> | 2943K |
| 代理商： | XC9508_1 |
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11/38
XC9508
Series
●
DC/DC Waveform (3.3V, 1.2MHz)
< External Components>
L:4.7
μ
H(CDRH4D28C,SUMIDA)
CIN:4.7
μ
F(ceramic)
CL:10
μ
F(ceramic)
< External Components>
L:4.7
μ
H(CDRH4D28C,SUMIDA)
CIN:4.7
μ
F(ceramic)
CL:10
μ
F(ceramic)
●
Voltage Detector
The detector block of the XC9508 series detects output voltage from the V
DOUT
pin to the signal, which enters from V
DIN
.
(N-channel Open Drain Type)
<CE Pin Function>
The operation of the XC9508 series' DC/DC converter block and voltage regulator block will enter into the shut down
mode when a low level signal is input to the CE pin. During the shut down mode, the current consumption occurs only in
the detector and is 0.6
μ
A (TYP.), with a state of high impedance at the Lx pin and DC
OUT
pin. The IC starts its operation
by inputting a high level signal to the CE pin. The input to the CE pin is a CMOS input and the sink current is 0
μ
A
(TYP.).
<MODE Pin Function>
The operation of the XC9508A series' voltage detector block will enter into stand-by mode when a high level signal is input
to the MODE pin. When a low level signal is input, the voltage regulator block will enter into stand-by mode. However,
if the IC enters into stand-by mode via the CE pin, the voltage regulator block also shuts down. With the XC9508C
series control can be PWM control when the MODE pin is 'H' level and PWM/PFM automatic switching control when the
MODE pin is 'L' level.
●
Application Information
1. The XC9508 series is designed for use with ceramic output capacitors. If, however, the potential difference between
dropout voltage or output current is too large, a ceramic capacitor may fail to absorb the resulting high switching
energy and oscillation could occur on the output. If the input-output potential difference is large, connect an
electrolytic capacitor in parallel to compensate for insufficient capacitance.
2. Spike noise and ripple voltage arise in a switching regulator as with a DC/DC converter. These are greatly
influenced by external component selection, such as the coil inductance, capacitance values, and board layout of
external components. Once the design has been completed, verification with actual components should be done.
3. When the difference between V
IN
and V
OUT
is large in PWM control, very narrow pulses will be outputted, and there
is the possibility that some cycles may be skipped completely.
4. When the difference between V
IN
and V
OUT
is small, and the load current is heavy, very wide pulses will be outputted
and there is the possibility that some cycles may be skipped completely: in this case, the Lx pin may not go low at all.
■
NOTES ON USE
■
OPERATIONAL EXPLANATION (Continued)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XC9509A033AL | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
| XC9509A033AR | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
| XC9509A033DL | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
| XC9509A033DR | Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator in Parallel Plus Voltage Detector |
| XC9509A036AL | 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 |
|---|---|
| XC9508AXXXXX | 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 plus Voltage Detector |
| XC9508CXXXXX | 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 plus Voltage Detector |
| XC9508X15XXX | 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 plus Voltage Detector |
| XC9508XXX3XX | 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 plus Voltage Detector |
| XC9508XXX6XX | 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 plus Voltage Detector |
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