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| R1154 Datasheet, PDF (6/22 Pages) RICOH electronics devices division – 150mA Voltage Regulator (Wide Input Voltage Range) | |||
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R1154x
POWER DISSIPATION (SOT-23-5)
This specification is at mounted on board. Power Dissipation (PD) depends on conditions of mounting on board.
This specification is based on the measurement at the condition below:
(Power Dissipation (SOT-23-5) is substitution of SOT-23-6.)
Measurement Conditions
Environment
Board Material
Board Dimensions
Copper Ratio
Through-holes
Standard Land Pattern
Mounting on Board (Wind velocity=0m/s)
Glass cloth epoxy plastic (Double sided)
40mm ï´ 40mm ï´ 1.6mm
Top side : Approx. 50% , Back side : Approx. 50%
ï¦0.5mm ï´ 44pcs
Measurement Results
Power Dissipation
Thermal Resistance
600
500
400 420
Standard Land Pattern
420mW
ï±jaï½(125ï25ï°C)/0.42Wï½238ï°C/W
On Board
(Topt=25ï°C, Tjmax=125ï°C)
Free Air
250mW
400ï°C/W
40
300
200 250
100
Free Air
0
0
25
50
75
100105 125 150
Ambient Temperature (ï°C)
Power Dissipation
RECOMMENDED LAND PATTERN
0.7 Max.
Measurement Board Pattern
IC Mount Area (Unit: mm)
1.0
2.4
0.95 0.95
1.9
(Unit: mm)
6
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