參數(shù)資料
型號(hào)： XC6414
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(cè)功能
文件頁(yè)數(shù)： 13/20頁(yè)
文件大小： 643K
代理商： XC6414
13/20
XC6413/XC6414
Series
Cdelay
DELAY TIME (TYP.)
DELAY TIME
0.01
μ
F
14msec
7 ~ 24.5msec
0.022
μ
F
30.8msec
15.4 ~ 53.9msec
0.047
μ
F
0.1
μ
F
65.8msec
140msec
32.9 ~ 115.15msec
70 ~ 245msec
0.22
μ
F
308msec
154 ~ 539msec
0.47
μ
F
658msec
329 ~ 1151.5msec
1
μ
F
1400msec
700 ~ 2450msec
VR
OUT
0.9 ~ 1.2V
1.3 ~ 1.7V
1.8 ~ 5.5V
C
L
More than 4.7
μ
F
More than 2.2
μ
F
More than 1.0
μ
F
■
OPERATIONAL EXPLANATION
<Output Voltage Regulator Control>
The voltage, divided by resistors R1 & R2 which are connected to the V
ROUT
pin 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 & stabilized by negative feedback.
The current limit circuit and short circuit protection operate in relation to the level of output current. Further, the voltage
regulator's internal circuitry can be shutdown via the EN or CE pin's signal.
<Detector Function with the XC6413/14 Series>
The series' detector function monitors the voltage divided by resistors R3 & R4 which are connected to the V
ROUT
pin or the
V
IN
pin or the V
SEN
pin, as well as monitoring the voltage of the internal reference voltage source via the comparator. The
V
DSEN
pin has options (please refer to the Selection Guide, item 4). A 'High' or 'Low' signal level can be output from the
V
DOUT
pin when the VD pin voltage level goes below the detect voltage. The VD output logic has options (please refer to
the Selection Guide, item 5). As V
DOUT
is an open-drain N-channel output, a pull-up resistor of about 220k
Ω
is needed to
achieve a voltage output. Because of hysteresis at the detector function, output at the V
DOUT
pin will invert when the detect
voltage level increases above the release voltage (105% of the detect voltage). Even when the XC6413/14A, B, C, series
are in stand-by mode, the voltage detector function operates and the output voltage at V
DOUT
will output according to the
voltage level at V
DSENSE
voltage. For the XC6413/14A, B, C types, in stand-by, if a voltage of the recovery voltage is
present at the V
ROUT
pin (from another power source), the V
DOUT
pin will be high impedance mode, and the pull up voltage
will be output at V
DOUT
. By connecting the Cdelay pin to a capacitor (Cd), the XC6413/14F series can apply a delay time to
V
DOUT
voltage when releasing voltage. The delay time can be calculated from the internal resistance, Rdelay (2M
Ω
, TYP.,
fixed) and the value of Cd as per the following equation.
Delay Time = Cdelay
×
Rdelay
×
0.7
<Low ESR Capacitors>
With the XC6403/04 series regulator, a stable output voltage is achievable even if low ESR capacitors are used, as a phase
compensation circuit is built-in to the regulator. In order to ensure the effectiveness of the phase compensation, we suggest
that an output capacitor (C
L
) be connected as close as possible, between the output pin (V
ROUT
) and the V
SS
pin. Please
use an output capacitor (C
L
) with a capacitance, based on the chart below. We also suggest an input capacitor (C
IN
) of 1
μ
F : this should be connected between V
IN
and V
SS
in order to stabilize input power source.
<Current Limiter, Short-Circuit Protection>
The XC6413/14 series regulator offers a combination of current limit and circuit protection by means of a built-in fixed current
limiter circuit and a foldback circuit. When the load current reaches the current limit level, the fixed current limiter circuit
operates and output voltage drops. As a result of this drop in output voltage, the foldback circuit operates, the output voltage
drops further and output current decreases. When the output pin is shorted, a current of about 50mA flows.
<EN / CE Pin>
The IC's internal regulator circuitry can be shut down via the signal from the EN pin with the XC6413/14A, B, C series. In
shutdown mode, output at the V
ROUT
pin will be pulled down to the V
SS
level via R1 & R2. The whole IC's circuitry can be
shut down via CE pin with the XC6413/14D series and power consumption can be reduced to around 0
μ
A (TYP.). 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.
Input Current = V
IN
voltage / Pull-Up Resistance
●
Delay Time
Rdelay: 1.0 ~ 3.5M
Ω
, TYP:2.0M
Ω
●
Output Capacitor Corresponding Chart
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