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參數(shù)資料
| 型號： | XC9511A1464 |
| 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)換器內(nèi)置LDO的同時加電壓檢測器調(diào)節(jié)器 |
| 文件頁數(shù)： | 13/35頁 |
| 文件大?。?/td> | 3471K |
| 代理商： | XC9511A1464 |
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13/35
XC9511
Series
●
Application Information (Continued)
14. Should the bi-directional load current of the synchronous DC/DC converter and the regulator become large, please
be careful of the power dissipation when in use. Please calculate power dissipation by using the following formula.
Pd=PdDC/DC + PdVR
DC/DC power dissipation (when in synchronous operation):
PdDC/DC = I
DOUT
2
x RON
VR power dissipation:
PdVR=(V
IN
– VR
OUT
) x IR
OUT
RON: ON resistance of the built-in driver transistor to the DC/DC (= 0.5
Ω
<TYP.>)
RON=Rpon x PchOnDuty / 100
+ Rnon x (1 - PchOnDuty / 100)
15. The voltage detector circuit built-in the XC9511 series internally monitor the V
DD
pin voltage, the DC/DC output pin
voltage and VR output pin voltage. For the XC9511B/C/E/F series, which voltage detector circuit monitors the
DC/DC output pin voltage and the VR output pin voltage, please determine the detect voltage value (V
DF
) by the
following equation.
V
DF
≦
(Setting voltage on both the D
COUT
voltage and the V
ROUT
voltage) × 85%*
* An assumed value of tolerance among the DC
OUT
voltage, the VR
OUT
voltage, and the VD release voltage
(The VD detect voltage and hysteresis range).
●
Instructions on Pattern Layout
1. In order to stabilize V
IN
's voltage level, we recommend that a by-pass capacitor (C
IN
) be connected as close as
possible to the A
VDD
& A
GND
pins. Should it not be possible to place the input capacitors nearby, the regulated
output level may increase because of the switching noise of the DC/DC converter.
2. Please mount each external component as close to the IC as possible.
3. Wire external components as close to the IC as possible and use thick, short connecting traces to reduce the circuit
impedance.
4. Make sure that the PCB GND traces are as thick as possible, as variations in ground potential caused by high
ground currents at the time of switching may result in instability of the DC/DC converter and have adverse influence
on the regulator output.
5. If using a Schottky diode, please connect the anode side to the A
GND
pin through C
IN
. Characteristic degradation
caused by the noise may occur depending on the arrangement of the Schottky diode.
6. Please use the A
VDD
and P
VDD
pins with the same electric potential.
<SOP-8 Reference pattern layout>
■
NOTES ON USE (Continued)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XC9511A146SRL | 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 |
| XC9511A14C3 | 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 |
| XC9511A14C4 | 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 |
| XC9511A14CSRL | 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 |
| XC9511A14SRL | 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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