![](/html/Siemens/740749/page11.png)
Figure 6b: Undervoltage restart of charge pump
Von
VON(CL)
V
bb(over)
V
bb(u rst)
V
bb(o rst)
V bb(under)
V
bb(u cp)
charge pump starts at Vbb(ucp) =5.6 V typ.
V bb
Figure 7a: Overvoltage:
IN
Vbb
VON(CL) Vbb(over)
Vbb(o rst)
V
OUT
ST
t
Semiconductor Group
11
BTS 425 L1