Application information

TS4604

22/31

Doc ID 17913 Rev 1

For example, to obtain Vuvp = 3.3 V with a hysteresis of 200 mV:

●

R1 = 1 k

Ω

●

R2 = 1.6 k

Ω

●

R3 = 15 k

Ω

Figure 49.

External UVLO

Figure 50.

Hysteresis of the external UVLO

When the external sense voltage (ESV) increases, the TS4604 stays in standby mode until

the EUVP pin reaches 1.25 V (voltage across the divider R1, R2). At this point, the TS4604

starts, as does the internal 5 µA current source connected to the EUVP pin. Thanks to this

5 µA current, a voltage drop is created across the R3 resistor.

15 k

R3

1.6 k

R2

1 k

R1

Precision

band gap

1.25 V

+

5 µA

TS4604

-

External sense voltage

Vcc

AM06143

Icc

External sense

voltage

VHyst

Vuvp

AM06144