Recommended operating conditions

The operating conditions are the physical parameters that the chip can operate within.

Table 1. Recommended operating conditions
Symbol	Parameter	Notes	Min.	Nom.	Max.	Unit
VBUS_OP	Supply voltage		4.1	5	6.7	V
VBAT_OP	Battery voltage		2.30		4.35	V
T_J	Junction temperature		-40		+125	°C
T_O	Operating temperature	Ambient	-40		+85	°C

Dissipation ratings

Thermal resistances and thermal characterization parameters as defined by JESD51-7 are shown in the following table.

Table 2. Recommended operating conditions
Symbol	Parameter	WLCSP 25 pins	Units
R_ϴJA	Junction-to-ambient thermal resistance	50.7	°C/W
R_ϴJC(top)	Junction-to-case (top) thermal resistance	9.2	°C/W
R_ϴJB	Junction-to-board thermal resistance	22.6	°C/W
Ψ_JT	Junction-to-top characterization parameter	1.05	°C/W
Ψ_JB	Junction-to-board characterization parameter	23	°C/W

Table 3. Recommended operating conditions
Symbol	Parameter	QFN 24 pins	Units
R_ϴJA	Junction-to-ambient thermal resistance	33.5	°C/W
R_ϴJC(top)	Junction-to-case (top) thermal resistance	16.1	°C/W
R_ϴJB	Junction-to-board thermal resistance	14.1	°C/W
Ψ_JT	Junction-to-top characterization parameter	0.25	°C/W
Ψ_JB	Junction-to-board characterization parameter	14.1	°C/W

WLCSP package is sensitive to visible and near infrared light, which means that a final product design must shield the chip properly.