Before initial power-up follow these steps to configure the

evaluation board for specific end application requirements:

2.0 Undervoltage (UV) and Overvoltage (OV) resistors set up:

2.1 UV and OV programmable resistors are configured

for a 3.3 V Vin (BUS voltage) application in a

two-resistor voltage divider configuration as shown in

Figure 4. UV is set to 2.6 V and OV is set for 3.8 V,

Ω 1%. If PI2002-EVAL1 is

required to be used in a different Vin voltage

application please follow the following steps to

change the resistor values.

2.1.1 It is important to consider the maximum current

that will flow in the resistor divider and

maximum error due to UV and OV input .

current.

allowable minimum current and 1% error;

Where:

V(UV) : UV voltage set (0.5 V typ)

Where:

V(OV) : OV voltage set (0.5 V typ)

PI2002

UV

OV

FT

FT

V_Logic

GND

R2

UV

R2

OV

Vin

Figure 4 – UV & OV two-resistor divider configuration

Ref. Desg.

U1

U2

R3

R14

R1

R12

R4

R15

R2

R13

Picor Corporation • www.picorpower.com

PI2002-EVAL1 User Guide Rev 1.0 Page 5 of 11

2.1.3 Example for 2.0 V Vin (BUS voltage), to set UV and OV for ±10% Vin set UV at 1.8 V and OV at 2.2 V.

0.5 V

0.5 V