AN30185A Datasheet, PDF (17/28 Pages) Panasonic Semiconductor – VIN = 2.9V to 5.5V 2ch,0.8A General-purpose High Efficiency Power LSI

AN30185A
OPERATION (Continued)
3. Protection
Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed.
VREG pin Ground Short Operation
VREG pin is an output pin of LDO used in internal circuits. The operation of each function stops just after VREG pin
Is shorted to GND. Since each function is not latched unlike the case of [3.Protection : Protection sequence], it
recovers by the release of ground-short.
The operation is as follows.
2.55 V
VREG _{2.1 V}
RESET
Ground-short Ground-short release
30 ms
1.0 V
FB1
V_IN
PCNT
0.94 ms
DIS
(3.3 V line)
3.3 V
PCNTB
1.8 V
FB2
3.75 ms
BUF
Normal operation
OFF state
4.22 ms
Normal operation (Start sequence)
17
Ver. BEB