Integrated Circuits (ICs)

LD1085V50

Active

STMicroelectronics

FIXED LDO VOLTAGE REGULATOR, 8V TO 30V, 1.3V DROPOUT, 5VOUT, 3AOUT, TO-220-3 ROHS COMPLIANT: YES

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DocumentsProduct Change Notice EN Datasheet

Integrated Circuits (ICs)

LD1085V50

Active

STMicroelectronics

FIXED LDO VOLTAGE REGULATOR, 8V TO 30V, 1.3V DROPOUT, 5VOUT, 3AOUT, TO-220-3 ROHS COMPLIANT: YES

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DocumentsProduct Change Notice EN Datasheet

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LD1085V50

Current - Output	3 A
Current - Quiescent (Iq)	10 mA
Mounting Type	Through Hole
Number of Regulators	1
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	1.81 mOhm
Package / Case	TO-220-3
Protection Features	Over Current, Over Temperature
PSRR	72 dB
Supplier Device Package	TO-220
Voltage - Input (Max) [Max]	30 V
Voltage - Output (Min/Fixed)	5 V
Voltage Dropout (Max) [Max]	1.5 V

LD1085 Series

3 A low drop positive voltage regulator: adjustable and fixed

Part	Voltage Dropout (Max) [Max]	Output Type	Mounting Type	Current - Output	Output Configuration	Voltage - Input (Max) [Max]	Voltage - Output (Min/Fixed)	Current - Quiescent (Iq)	Number of Regulators	Supplier Device Package	Protection Features	Operating Temperature [Max]	Operating Temperature [Min]	PSRR	Package / Case
STMicroelectronics LD1085D2T18R	1.5 V	1.81 mOhm	Surface Mount	3 A	Positive	30 V	1.8 V	10 mA	1	D2PAK	Over Current Over Temperature	125 °C	-40 °C	72 dB	D2PAK (2 Leads + Tab) TO-263-3 TO-263AB
STMicroelectronics LD1085V18	1.5 V	1.81 mOhm	Through Hole	3 A	Positive	30 V	1.8 V	10 mA	1	TO-220	Over Current Over Temperature	125 °C	-40 °C	72 dB	TO-220-3
STMicroelectronics LD1085D2T12R	1.5 V	1.81 mOhm	Surface Mount	3 A	Positive	30 V	12 V	10 mA	1	D2PAK	Over Current Over Temperature	125 °C	-40 °C	66 dB	D2PAK (2 Leads + Tab) TO-263-3 TO-263AB
STMicroelectronics LD1085D2M50	1.5 V	1.81 mOhm	Surface Mount	3 A	Positive	30 V	5 V	10 mA	1	D2PAK-3	Over Current Over Temperature	125 °C	-40 °C	72 dB	D2PAK (3 Leads + Tab) TO-263-4 TO-263AA
STMicroelectronics LD1085V50	1.5 V	1.81 mOhm	Through Hole	3 A	Positive	30 V	5 V	10 mA	1	TO-220	Over Current Over Temperature	125 °C	-40 °C	72 dB	TO-220-3
STMicroelectronics LD1085V12	1.5 V	1.81 mOhm	Through Hole	3 A	Positive	30 V	12 V	10 mA	1	TO-220	Over Current Over Temperature	125 °C	-40 °C	66 dB	TO-220-3
STMicroelectronics LD1085V33	1.5 V	1.81 mOhm	Through Hole	3 A	Positive	30 V	3.3 V	10 mA	1	TO-220	Over Current Over Temperature	125 °C	-40 °C	72 dB	TO-220-3
STMicroelectronics LD1085D2M33R	1.5 V	1.81 mOhm	Surface Mount	3 A	Positive	30 V	3.3 V	10 mA	1	D2PAK-3	Over Current Over Temperature	125 °C	-40 °C	72 dB	D2PAK (3 Leads + Tab) TO-263-4 TO-263AA

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 1.77
		10	$ 1.59
		50	$ 1.50
		100	$ 1.28
		250	$ 1.20
		500	$ 1.05
		1000	$ 0.87
		2500	$ 0.81
		5000	$ 0.78

Description

General part information

LD1085 Series

The LD1085 is a low drop voltage regulator able to provide up to 3 A of output current. Dropout is guaranteed at a maximum of 1.2 V at the maximum output current, decreasing at lower loads. The LD1085 is pin-to-pin compatible with the older 3-terminal adjustable regulators, but offers better performance in terms of drop and output tolerance.

Unlike PNP regulators, where a part of the output current is wasted as quiescent current, the LD1085 quiescent current flows into the load, thus increase efficiency. Only a 10 μF minimum capacitor is need for stability.

The device is supplied in TO-220, TO-220FP, D²PAK and D²PAK/A packages. On-chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 1% at 25 °C.

Documents

Technical documentation and resources

Product Change Notice EN

Datasheet