Datasheet

3
Supertex inc.
www.supertex.com
Doc.# DSFP-LR8
B080113
LR8
Thermal Characteristics
Package
Power Dissipation
@ T
A
= 25°C
θ
jc
°C/W
θ
ja
°C/W
TO-92 0.74W 125 170
TO-243AA 1.6W 15 78
†
TO-252 2.5W 6.25 50
†
Note:
† Mounted on FR4 board, 25mm x 25mm x 1.57mm.
Functional Block Diagram
Overtemp &
Overcurrent
10µA 1.2V
VIN
VOUT
ADJ
LR8
Pass
Element
Sym Parameter Min Typ Max Units Conditions
I
OUT
Minimum output current - 0.3 0.5 mA Includes R1 and load current
I
ADJ
Adjust output current 5.0 10 15 µA ---
C2 Minimum output load capacitance 1.0 - - µF ---
DV
OUT
/DV
IN
Ripple rejection ratio 50 60 - dB 120Hz, V
OUT
= 5V
T
LIMIT
Junction temperature limit 125 - - °C ---
Electrical Characteristics (cont.)
(Test conditions unless otherwise specied: -40°C < T
A
< 85°C.)