XC6222 TOREX [Torex Semiconductor], XC6222 Datasheet - Page 9

• Manufacturer Part Number: XC6222
• Description: Reverse Current Protection, 700mA High Speed LDO Regulator
• Manufacturer: TOREX [Torex Semiconductor]

The entire XC6222 circuitry can be turned off via the CE pin signal. In shutdown mode, output at the V
For the XC6222A/B series, the output voltage becomes unstable, when the CE pin is left open. If this CE pin voltage is set with
■OPERATIONAL EXPLANATION (Continued)
<C
<CE Pin>
down to the V
R1 and R2 while the power supply is applied to the V
the specified voltage range, 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 to the CE pin. With the XC6222C/D
series, when the CE pin is left open, output voltage is fixed to V
■NOTES ON USE
XC6222B/D series can discharge the electric charge stored in the output capacitor (C
enables the whole IC circuit to be turned off, is inputted via the N-channel transistor located between the V
pin (cf. BLOCK DIAGRAM). The CL auto-discharge resistance value is set at 530Ω(TYP.). The discharge time of the output
capacitor (C
C
discharge via the N-channel transistor is calculated by the following formula.
2. Where wiring impedance is high, operations may become unstable due to noise and/or phase lag depending on
1
L
.
L
where
auto-discharge resistance value [R
output current.
Please use this IC within the stated absolute maximum ratings. The IC is liable to malfunction should the ratings be
exceeded.
Auto-Discharge Function>
Please wire the input capacitor (C
V: Output voltage after discharge
V
τ: C
OUT (E)
t: Discharge time
V = V
L
auto-discharge resistance R
L
OUT(E)
) is set by the CL auto-discharge resistance (R) and the output capacitor (C
: Output voltage
SS
level via R1 & R2. However, with the XC6222B series, the C
x e
–t/ τ
, or t=
τ
IN
In ( V / V
DCHG
) and the output capacitor (C
DCHG
] and the output capacitor value (C
×Output capacitor (C
OUT(E)
IN
)
pin. Therefore, time until the V
SS
level.
L
) value C)
L
) as close to the IC as possible.
L
auto-discharge resistor is connected in parallel to
L
) as τ(τ=C x R
L
), when a low signal to the CE pin, which
OUT
L
). By setting the time constant of the
pin reaches the V
DCHG
), the output voltage after
OUT
OUT
SS
pin will be pulled
pin and the V
level is shorter.
XC6222
Series
9/26
SS