R1150H Datasheet, PDF (25/28 Pages) RICOH electronics devices division – VOLTAGE REGULATOR(with Wide Input Voltage Range) with RESET

R1150H
Output Delay Time for Release VDET
In the R1150Hxx1C/D can set an output delay time for release voltage detector with connecting a capacitor to
CD pin. When an input voltage (in the case of R1150Hxx1C) or an output voltage (in the case of R1150Hxx1D)
surpasses the release voltage of its voltage detector (+VDET), the capacitor which is connected to CD pin is started
to be charged, as a result, CD pin voltage rises. When the CD pin voltage surpasses CD pin threshold voltage, the
output voltage of the voltage detector outputs “H”.
Input Voltage or Output Voltage
CD Pin Voltage
Released Voltage (+VDET)
CD Pin Threshold Voltage
GND
Output Voltage
Output Delay Time (tpLH)
GND
Output delay time for release voltage detector can be calculated with the next formula:
tpLH=1.25/200×10⁹×C (sec)
Input Transient Response
If input transient is 0.12V/µs or faster, the output response may be extremely worse than normal operation. In
that case, add a capacitor between VIN and GND, and make the transient speed of VIN slower than 0.12V/µs.
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