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XC6221A08AMR-G

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28
7/28
XC6221
Series
OUTPUT VOLTAGE
(Standard)
V
OUT(E)
(V)
OUTPUT VOLTAGE
(High Accuracy)
V
OUT(E)
(V)
DROPOUT VOLTAGE
Vdif
(mV)
NOMINAL
OUTPUT
VOLTAGE
(V)
MIN. MAX. MIN. MAX. TYP. MAX.
3.00 2.9400 3.0600 2.9700 3.0300
3.05 2.8990 3.1100 3.0195 3.0805
3.10 3.0380 3.1620 3.0690 3.1310
3.15 3.0870 3.2130 3.1185 3.1815
3.20 3.1360 3.2640 3.1680 3.2320
3.25 3.1850 3.3150 3.2175 3.2825
3.30 3.2340 3.3660 3.2670 3.3330
3.35 3.2830 3.4170 3.3165 3.3835
3.40 3.3320 3.4680 3.3660 3.4340
3.45 3.3810 3.5190 3.4155 3.4845
3.50 3.4300 3.5700 3.4650 3.5350
3.55 3.4790 3.6210 3.5145 3.5855
3.60 3.5280 3.6720 3.5640 3.6360
3.65 3.5770 3.7230 3.6135 3.6855
3.70 3.6260 3.7740 3.6630 3.7370
3.75 3.6750 3.8250 3.7125 3.7875
3.80 3.7240 3.8760 3.7620 3.8380
3.85 3.7730 3.9270 3.8115 3.8885
3.90 3.8220 3.9780 3.8610 3.9390
3.95 3.8710 4.0290 3.9105 3.9895
4.00 3.9200 4.0800 3.9600 4.0400
4.05 3.9690 4.1310 4.0095 4.0905
4.10 4.0180 4.1820 4.0590 4.1410
4.15 4.0670 4.2330 4.1085 4.1915
4.20 4.1160 4.2840 4.1580 4.2420
4.25 4.1650 4.3350 4.2075 4.2925
4.30 4.2140 4.3860 4.2570 4.3430
4.35 4.2630 4.4370 4.3065 4.3935
4.40 4.3120 4.4880 4.3560 4.4440
4.45 4.3610 4.5390 4.4055 4.4945
4.50 4.4100 4.5900 4.4550 4.5450
4.55 4.4590 4.6410 4.5045 4.5955
4.60 4.5080 4.6920 4.5540 4.6460
4.65 4.5570 4.7430 4.6035 4.6965
4.70 4.6060 4.7940 4.6530 4.7470
4.75 4.6550 4.8450 4.7025 4.7975
4.80 4.7040 4.8960 4.7520 4.8480
4.85 4.7530 4.9470 4.8015 4.8985
4.90 4.8020 4.9980 4.8510 4.9490
4.95 4.8510 5.0490 4.9005 4.9995
5.00 4.9000 5.1000 4.9500 5.0500
80 140
■OUTPUT VOLTAGE CHART (Continued)
8/28
XC6221 Series
each
circuit
ON/OFF
Control
CE V
IN
V
SS
V
OUT
R1
R2
Error
Amp
-
+
CE CE/
Voltage
Reference
Current
Limit
CE/
Rdischg
●Except USPN-4
OUTPUT VOLTAGE (V) OUTPUT CAPACITOR VALUE
0.80V∼1.15V C
L
≧4.7μF
1.20V∼1.35V C
L
≧2.2μF
1.40V∼4.00V C
L
≧1.0μF
4.05V∼5.00V C
L
≧2.2μF
●USPN-4
OUTPUT VOLTAGE (V) OUTPUT CAPACITOR VALUE
1.20V∼4.00V C
L
≧2.2μF
4.05V∼5.00V C
L
≧4.7μF
■OPERATIONAL EXPLANATION
<Output Voltage Control>
The voltage divided by resistors R1 & R2 is compared with the internal reference voltage by the error amplifier. The
P-channel MOSFET connected to the V
OUT
pin, is then driven by the subsequent output signal. The output voltage at the
V
OUT
pin is controlled & stabilized by a system of negative feedback. The current limit circuit and short protect circuit
operate in relation to the level of output current. Further, the IC's internal circuitry can be shutdown via the CE pin's signal.
<Input and Output Capacitors>
The XC6221 needs an output capacitor C
L
for phase compensation. Values required for the phase compensation are
shown in the chart below. If a loss of the capacitance happens, the stable phase compensation may not be obtained.
Please ensure to use a capacitor which does not depend on bias or temperature too much. For a stable power input,
please connect an input capacitor C
IN
of 1.0μF between the V
IN
pin and the V
SS
pin.
<C
L
Auto-Discharge Function>
XC6221B/D series can discharge the electric charge in the output capacitor (C
L
), when a low signal to the CE pin, which
enables the whole IC circuit to be turned off, is inputted via the N-channel transistor and C
L
auto-discharge resistance
(R
DCHG
) located between the V
OUT
pin and the V
SS
pin (cf. BLOCK DIAGRAM). The C
L
auto-discharge resistance (R
DCHG
)
value is set at 780Ω(V
OUT
=4.0V @ V
IN
=6.0V at typical). The discharge time of the output capacitor (C
L
) is set by the C
L
auto-discharge resistance (R
DCHG
) and the output capacitor (C
L
). By setting the time constant of the C
L
auto-discharge
resistance value [R
DCHG
] and the output capacitor value (C
L
) as τ(τ=C
L
x R
DCHG
), the output voltage after discharge via
the N-channel transistor is calculated by the following formula.
V = V
OUT(E)
x e
–t/
τ
, or t=
τ
In ( V / V
OUT(E)
)
where
V : Output voltage after discharge
V
OUT (E)
: Output voltage
t : Discharge time
τ: C
L
auto-discharge resistance R
DCHG
×Output capacitor value C
L
9/28
XC6221
Series
■OPERATIONAL EXPLANATION (Continued)
<Current Limiter, Short-Circuit Protection>
The XC6221 series’ fold-back circuit operates as an output current limiter and a short protection circuit for the output pin.
When the load current reaches the current limit level, the fixed current limiter circuit operates and output voltage drops.
When the output pin is short-circuited to the V
SS
pin, the current falls and reaches about 30mA.
<CE Pin>
The XC6221 internal circuitry can be shutdown via the CE pin signal. In shutdown mode, output at the V
OUT
pin will be
pulled down to the V
SS
level via R1 & R2. However, with the XC6221B/D series, the C
L
auto-discharge resistor is
connected in parallel to R1 and R2 while the power supply is applied to the V
IN
pin. Therefore, time until the V
OUT
pin
reaches the V
SS
level is shorter. For the XC6221A/B, the output voltage becomes unstable, when the CE pin is left
open. For the XC6221C/D, the output voltage becomes V
SS
level because the CE pin is short-circuited to V
SS
via an
internal pull-down resistor. However, the CE input current will be increased via a pull-down resistor when the IC
operates. If this IC is used with the correct output voltage for the CE pin, the logic is fixed and the IC will operate
normally. However, the supply current may increase as a result of shoot-through current in the IC's internal circuitry
when a medium voltage is input.
1. Please use this IC within the stated maximum ratings. For temporary, transitional voltage drop or voltage rising
phenomenon, the IC is liable to malfunction should the ratings be exceeded.
2. Where wiring impedance is high, operations may become unstable due to noise and/or phase lag depending
on output current. Please wire the input capacitor (C
IN
) and the output capacitor (C
L
) as close to the IC as possible.
3. Torex places an importance on improving our products and its reliability.
However, by any possibility, we would request user fail-safe design and post-aging treatment on system or equipment.
■NOTES ON USE
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28

XC6221A08AMR-G

Mfr. #:
Buy XC6221A08AMR-G
Manufacturer:
Torex Semiconductor
Description:
LDO Voltage Regulators 200mA High Speed LDO Regulator
Lifecycle:
New from this manufacturer.
Delivery:
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