R1524 Datasheet, PDF (17/32 Pages) RICOH electronics devices division – Input Voltage Range (Maximum Rating) 3.5 V to 36 V (50 V)

R1524x
NO.EA-332-160720
POWER DISSIPATION (DFN(PLP)1820-6)
Power Dissipation (PD) depends on conditions of mounting on board. This specification is based on the
measurement at the condition below:
Measurement Conditions
Environment
Board Material
Board Dimensions
Copper Ratio
Through-hole
Standard Land Pattern
Mounting on Board (Wind velocity = 0 m/s)
Glass cloth epoxy plastic (Double sided)
40 mm x 40 mm x 1.6 mm
Top side: Approx. 50%, Back side: Approx. 50%
φ 0.54mm x 30 pcs
Measurement Result
Power Dissipation
Thermal Resistance
(Ta = 25°C, Tjmax = 125°C)
Standard Land Pattern
880 mW
θja = (125-25°C) / 0.88 W = 114°C/W
1200 ₁₀₉₆
40
1000
800 ₈₈₀
On Board
(Standard Land Pattern)
600
400
200
0
105
0 25 50 75 100 125 150
Ambient Temperature (°C)
Power Dissipation vs. Ambient Temperature
IC Mount Area (Unit: mm)
Measurement Board Pattern
The above graph shows the Power Dissipation of the package based on Tjmax = 125°C and Tjmax = 150°C.
Operating the IC in the shaded area in the graph might have an influence its lifetime.
Operating time must be within the time limit described in the table below, in case of operating in the shaded area.
Operating Time
Estimated years
(Operating four hours/day)
13,000 hours
9 years
17