參數(shù)資料
型號(hào)： XC6404DE84MR
廠商： TOREX SEMICONDUCTOR LTD.
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： High Current, High Speed LDO Regulators, Voltage Detector Function
中文描述： 高電流，高速LDO穩(wěn)壓器，電壓檢測功能
文件頁數(shù)： 25/54頁
文件大?。?/td> 544K
代理商： XC6404DE84MR
XC6404 Series
High Current, High Speed LDO Regulators,
Voltage Detector Function
!
OPERATIONAL EXPLANATION (Continued)
<EN / CE Pin>
The IC's internal regulator circuitry can be shut down via the signal from the EN pin with the XC6404A, B, C series. In shutdown mode, output at the
VROUT pin will be pulled down to the VSS level via R1 & R2. The whole IC's circuitry can be shut down via CE pin with the XC6404D series and power
consumption can be reduced to around 0
μ
A. While the voltage detector is in shutdown mode, the voltage detector output is in a post-detection state.
When choosing Detect L, input current can be set by using the following formula.
( * A ~ D Series)
<Toggle Operation>
The XC6404 A and B series have a built-in toggle ON/OFF switch which repeats an on/off operation via the EN pin's leading edge signal when the EN
logic is Active HIGH, and via the EN pin's falling edge signal when the EN logic is Active LOW (Please also refer the figure below). The EN input signal
duration should be over 500nsec. If the EN input signal is less than 500nsec, it is possible that the circuit fails to respond and the toggle function does
not operate. To operate the toggle function properly when the EN pin voltage noise is large, a RC filter should be used to reduce the noise in the signal
to the EN pin. In the case where input delay time is required, it is possible to set the time constant by connecting an RC network to the EN pin.
Active LOW with pull up
XC6404 * R ~ U
Active LOW with no pull up
XC6404 * A ~ D
Active HIGH with pull down
EN Logic Active "HIGH"
We suggest that you use this IC with either a VIN voltage or a VSS voltage input at the EN or CE pin. If this IC is used with the correct specifications for
the EN or CE pin, the IC will operate normally. However, supply current may increase as a result of through current in the IC's internal circuitry if a
voltage other than VIN or VSS is applied.
XC6404 * E ~ K
Active HIGH with no pull down
XC6404 * L ~ P
Input Current = V
IN
voltage / Pull Up Resistance
In stand-by mode, the above input current can be reduced by connecting a pull-up resistor between VROUT and VDOUT.
Note that as the XC6404*E to K types of the XC6404A to D series are 'Active HIGH / No Pull Down' and XC6404*R to U types of the XC6404A to D
series are 'Active LOW / No Pull Up', operations will become unstable with the CE pin open (See the chart below).
SERIES
EN/CE INPUT LOGIC
Semiconductor Ltd.
Rpull
220k
1uF
1.5k
0.1uF
VIN
VIN Voltage
GND
EN pin signal
VROUT Voltage
VROUT Voltage
GND
More than
500nsec
Internal Circuit - Response time
apporx. 10usec.
VIN
VSS
EN
VRVDOUT
1uF
CL
Data Sheet
25
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