ADP2291

Rev. 0 | Page 11 of 20

THERMAL SHUTDOWN

In the event that the ADP2291 junction temperature rises above

135°C, thermal shutdown occurs. Extreme junction tempera-

tures may be the result of excessive current operation and/or

high ambient temperatures. A 35°C temperature hysteresis is

included so that the ADP2291 does not return to operation

during thermal shutdown until the on-chip temperature drops

below 100°C.

CONTROL

LOGIC

TIMER

TEMP

VOLTAGE

REFERENCE

GM

3V

1.2V

5V

GM

GM

TIMER

ADJ

BAT

DRV

CS

IN

SHUTDOWN

VIN_GOOD

RESTART

BAT

4.1V

BAT

2.5V

CHG

0.4V

IN

BAT

IN

3.8V

IPNP

C/10

PRECHARGE

POWER_DOWN

END_OF_CHARGE

Figure 20. Functional Block Diagram