LR8 datasheet(3/16 Pages) MICROCHIP

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DS20005399A-page 3

LR8

1.0

ELECTRICAL CHARACTERISTICS

ABSOLUTE MAXIMUM RATINGS†

VIN 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

Test Conditions unless otherwise specified: -40°C <TA < 85°C

Symbol

Parameter

Min

Typ

Max

Units Conditions

VIN- VOUT

Input to output voltage difference

450

VOUT

Overall output voltage regulation

1.14

1.20

1.26

13.2V < VIN< 400V,

R1= 2.4kΩ, R2= 0

375

400

425

R1= 2.4kΩ, R2= 782kΩ

∆VOUT

Line regulation

0.003

0.01

%/V

17V < VIN< 400V, VOUT= 5V,

IOUT= 0.5mA

Load regulation

1.4

3.0

VIN= 17V, VOUT= 5V,

0.5mA <IOUT< 10mA

Temperature regulation

-1

VIN= 17V, VOUT= 5V, IOUT= 10mA,

-40°C < TA< 85°C

IOUT

Output current limit

TJ< 85°C, VIN- VOUT= 12V

0.5

TJ> 125°C, VIN- VOUT= 450V

IOUT

Minimum output current

0.3

0.5

Includes R1 and load current

IADJ

Adjust output current

5.0

µA

CLOAD

Minimum output load capacitance

1.0

µF

∆VOUT/∆VIN Ripple rejection ratio

120Hz, VOUT= 5V

TLIMIT

Junction temperature limit

125

°C

TABLE 1-2:

TYPICAL THERMAL RESISTANCE

Package

θja

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

@TA = 2.5°C

θjc

°C/W

θja

°C/W

TO-92

0.74W

125

170

TO-243AA (SOT-89)

1.6W

781

Mounted on FR4 board, 25mm x 25mm x 1.57mm

TO-252 (D-PAK)

2.5W

6.25

501

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