Integrated Circuits (ICs)

LR8N8-G

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Microchip Technology

1.2V-440V ADJUSTABLE POSITIVE REGULATOR, PSSO3

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Integrated Circuits (ICs)

LR8N8-G

Active

Microchip Technology

1.2V-440V ADJUSTABLE POSITIVE REGULATOR, PSSO3

Deep-Dive with AI

DocumentsDatasheet

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LR8N8-G

Current - Output	10 mA
Mounting Type	Surface Mount
Number of Regulators	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	TO-243AA
Protection Features	Over Current, Over Temperature
PSRR	60 dB
Supplier Device Package	TO-243AA (SOT-89)
Voltage - Input (Max) [Max]	450 V
Voltage - Output (Max) [Max]	438 V
Voltage - Output (Min/Fixed)	1.2 V

LR8 Series

High Voltage Adjustable 3-Terminal Linear Regulator, 450V

Part	Voltage - Output (Min/Fixed)	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Current - Output	Number of Regulators	Output Type	Voltage - Input (Max) [Max]	Mounting Type	Voltage - Output (Max) [Max]	Output Configuration	PSRR	Protection Features	Package / Case
Microchip Technology LR8N3-G-P003	1.2 V	85 °C	-40 °C	TO-92-3	10 mA	1	Adjustable	450 V	Through Hole	438 V	Positive	60 dB	Over Current Over Temperature	TO-226-3 TO-92-3
Microchip Technology LR8N8-G	1.2 V	85 °C	-40 °C	TO-243AA (SOT-89)	10 mA	1	Adjustable	450 V	Surface Mount	438 V	Positive	60 dB	Over Current Over Temperature	TO-243AA
Microchip Technology LR8N3-G	1.2 V	85 °C	-40 °C	TO-92-3	10 mA	1	Adjustable	450 V	Through Hole	438 V	Positive	60 dB	Over Current Over Temperature	TO-226-3 TO-92-3

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 0.83
		25	$ 0.71
		100	$ 0.63
	Digi-Reel®	1	$ 0.83
		25	$ 0.71
		100	$ 0.63
	Tape & Reel (TR)	2000	$ 0.63

Description

General part information

LR8 Series

LR8 is a high voltage, low output current, adjustable linear regulator. It has a wide operating input voltage range of 13.2 - 450V. The output voltage can be adjusted from 1.20 - 440V provided that the input voltage is at least 12V greater than the output voltage. The output voltage can be adjusted by means of two external resistors R1 and R2 as shown in the typical application circuits. The LR8 regulates the voltage difference between VOUT and ADJ pins to a nominal value of 1.20V. The 1.20V is amplified by the external resistor ratio R1 and R2. An internal constant bias current of typically 10µA is connected to the ADJ pin. This increases VOUT by a constant voltage of 10µA times R2.

The LR8 has current limiting and temperature limiting. The output current limit is typically 20mA and the minimum temperature limit is 125°C. An output short circuit current will therefore be limited to 20mA. When the junction temperature reaches its temperature limit, the output current and/or output voltage will decrease to keep the junction temperature from exceeding its temperature limit. For SMPS start-up circuit applications, the LR8 turns off when an external voltage greater than the output voltage of the LR8 is applied to VOUT of the LR8. To maintain stability, a bypass capacitor of 1.0µF or larger and a minimum DC output current of 500µA are required.

The device is available in TO-243AA (SOT-89), TO-252 (D-PAK), and TO-92 packages.

Documents

Technical documentation and resources