LM317 Calculator & Resistor Finder

V_in V

V_out V

I_load A Warning: LM317 typically requires 10mA minimum load.

I_div (min) mA

R₁ (min)

R₁ (max) Warning: R1 above 1.2kΩ is not usually recommended.

R₂ (min)

R₂ (max)

Series

I_adj (typ) µA

V_ref V

R_thJA °C/W

V_out = 1.25 × ( 1 + ( R₂ / R₁ ) ) + ( I_adj × R₂ )

Settings: V_in=?V, V_out=?V, I_load=?A, I_div=?mA, R_1[min]=?Ω, R_1[max]=?Ω, R_2[min]=?Ω, R_2[max]=?Ω, Series=?, I_adj=?µA, V_ref=?V, R_thJA=?°C/W

R₁ (Ω)	R₂ (Ω)	V_out (V)	Error (%)	Error (mV)	I_R1 & I_R2 (mA)	P_D[R1] (mW)	P_D[R2] (mW)	P_D[R1+R2] (mW)	P_D[reg] (mW)	Efficiency (%)	ΔT_J (°C)