Datasheet

 2015 Microchip Technology Inc. DS20005399A-page 3
LR8
1.0 ELECTRICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
†
V
IN
Input voltage (voltages ref to ADJ).............................................................................................................................. -0.5 to +480V
Output voltage range.......................................................................................................................................................... 0.5 to +470V
Operating ambient temperature range ........................................................................................................................... -40°C to +85°C
Operating junction temperature range ......................................................................................................................... -40°C to +125°C
Storage temperature .................................................................................................................................................... -65°C to +150°C
1.1 Electrical Specifications
† Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at those or any other conditions above those indicated in the
operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods
may affect device reliability.
TABLE 1-1: ELECTRICAL CHARACTERISTICS
1
1 Test Conditions unless otherwise specified: -40°C <T
A
< 85°C
Symbol Parameter Min Typ Max Units Conditions
V
IN
- V
OUT
Input to output voltage difference 12 450 V
V
OUT
Overall output voltage regulation
1.14 1.20 1.26 V
13.2V < V
IN
< 400V,
R
1
= 2.4kΩ, R
2
= 0
375 400 425 V R
1
= 2.4kΩ, R
2
= 782kΩ
∆V
OUT
Line regulation 0.003 0.01 %/V
17V < V
IN
< 400V, V
OUT
= 5V,
I
OUT
= 0.5mA
Load regulation 1.4 3.0 %
V
IN
= 17V, V
OUT
= 5V,
0.5mA <I
OUT
< 10mA
Temperature regulation -1 +1 %
V
IN
= 17V, V
OUT
= 5V, I
OUT
= 10mA,
-40°C < T
A
< 85°C
I
OUT
Output current limit
10 30 mA T
J
< 85°C, V
IN
- V
OUT
= 12V
0.5 mA T
J
> 125°C, V
IN
- V
OUT
= 450V
I
OUT
Minimum output current 0.3 0.5 mA Includes R
1
and load current
I
ADJ
Adjust output current 5.0 10 15 µA
C
LOAD
Minimum output load capacitance 1.0 µF
∆V
OUT
/∆V
IN
Ripple rejection ratio 50 60 dB 120Hz, V
OUT
= 5V
T
LIMIT
Junction temperature limit 125 °C
TABLE 1-2: TYPICAL THERMAL RESISTANCE
Package θ
ja
TO-252 (D-PAK) 81°C/W
TO-92 132°C/W
TO-243AA (SOT-89) 133°C/W
TABLE 1-3: THERMAL CHARACTERISTICS
Package
Power Dissipation
@T
A
= 2.5°C
θ
jc
°C/W
θ
ja
°C/W
TO-92 0.74W 125 170
TO-243AA (SOT-89) 1.6W 15 78
1
1 Mounted on FR4 board, 25mm x 25mm x 1.57mm
TO-252 (D-PAK) 2.5W 6.25 50
1