Overvoltage Protection Controllers with

Low Standby Current

_______________________________________________________________________________________

5

Functional Diagram

Figure 2. Shutdown Timing Diagram

80%

0V

MAX4843–

MAX4846

GATE DRIVER

GATE

FLAG

2x CHARGE

PUMP

5.5V

REGULATOR

IN

GND

UVLO AND

OVLO

DETECTOR

CONTROL

LOGIC AND

TIMER

0.3V

2.4V

5V

5V

8V

0.3V

0.3V

Figure 1. Startup Timing Diagram

Figure 3. Power-Up Overvoltage Timing Diagram