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XC6215P172MR Datasheet(PDF) 10 Page - Torex Semiconductor

Part # XC6215P172MR
Description  0.8關A Low Power Consumption Voltage Regulator with ON/OFF Switch
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Manufacturer  TOREX [Torex Semiconductor]
Direct Link  http://www.torex.co.jp
Logo TOREX - Torex Semiconductor

XC6215P172MR Datasheet(HTML) 10 Page - Torex Semiconductor

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XC6215 Series
OPERATIONAL EXPLANATION
NOTES ON USE
XC6215B Series (As for the XC6215P Series, with no CE pin)
1. Please use this IC within the stated absolute maximum ratings. 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.
3. As for the XC6215 series, internally achieved phase compensation makes a stable operation of the IC possible even when
there is no output capacitor (CL). In order to stabilize the VIN’s voltage level, we recommend that an input capacitor (CIN) of
about 0.1 to 1.0μF be connected between the VIN pin and the VSS pin. Moreover, during transient response, so as to prevent
an undershoot or overshoot, we recommend that the output capacitor (CL) of about 0.1 to1.0μF be connected between the
VOUT pin and the VSS pin. However, please wire the input capacitor (CIN) and the output capacitor (CL) as close to the IC as
possible.
<Short Protection Circuit>
The XC6215 series’ regulator offers circuit protection by means of a built-in 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.
<CE Pin>
The IC's internal circuitry can be operated or shutdown via the signal from the CE pin with the XC6215B series. In shutdown
mode, output at the VOUT pin will be pulled down to the VSS level via R1 & R2. Note that the XC6215 series’ regulator is “High
Active/No Pull-Down”, operations will become unstable with the CE pin open. We suggest that you use this IC with either a VIN
voltage or a VSS voltage input at the CE pin. If this IC is used with the correct specifications for the CE pin, the operational logic is
fixed and the IC will operate normally. However, supply current may increase as a result of through current in the IC's internal
circuitry.
<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, which is connected to the VOUT pin, is then driven by the subsequent output signal. The output voltage at the VOUT pin
is controlled and 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 operated or shutdown via the CE pin's signal.
ON/OFF
Control
each circuit
Error
Amp
-
+
Current
Limit
VIN
VSS
VOUT
R1
R2
Voltage
Reference
CE


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