LR8N8 データシートの表示（PDF） - Supertex Inc

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LR8N8

High Input Voltage Adjustable 3-Terminal Linear Regulator

Supertex Inc 

Thermal Characteristics

Package

TO-92

Power Dissipation

@ TA = 25°C

0.74W

TO-243AA

1.6W

TO-252

2.5W

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

Significant PD increase possible on ceramic substrate.

Functional Block Diagram

VIN

Pass

Element

θJC

°C/W

125

15

6.25

LR8

VOUT

Overtemp &

Overcurrent

1.2V

10µA

ADJ

LR8

θJA

°C/W

170

78†

50†

Typical Application Circuits

Figure 1: High Input Voltage, 5.0V Output Linear Regulator

*

VIN = 17V to 450V

C1

VIN VOUT

ADJ

LR8

R2

18.2KΩ

1%

VOUT = 5.0V

R1

6.04KΩ

1%

C2

1.0µF

RLOAD ≤16.5KΩ

* Required for conditions where VIN is less than VOUT

VOUT = 1.20V

1+

R2

R1

+ IADJ R2

3

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