Integrated Circuits (ICs)

LDS3985M18R

Active

STMicroelectronics

FIXED LDO VOLTAGE REGULATOR, 2.5V TO 6V, 150MV DROP, 1.8V/300MA OUT, SOT-23-5

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Integrated Circuits (ICs)

LDS3985M18R

Active

STMicroelectronics

FIXED LDO VOLTAGE REGULATOR, 2.5V TO 6V, 150MV DROP, 1.8V/300MA OUT, SOT-23-5

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Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LDS3985M18R

Control Features	Shutdown
Current - Output	300 mA
Current - Quiescent (Iq)	150 çA
Current - Supply (Max) [Max]	300 µA
Mounting Type	Surface Mount
Number of Regulators	1
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 C
Output Configuration	Positive
Package / Case	SOT-753, SC-74A
Protection Features	Over Temperature, Over Current
PSRR [Max]	55 dB
PSRR [Min]	50 dB
Supplier Device Package	SOT-23-5
Voltage - Input (Max) [Max]	6 V
Voltage - Output (Min/Fixed)	1.8 V
Voltage Dropout (Max) [Max]	0.25 V

LDS3985 Series

Part	Current - Quiescent (Iq)	Package / Case	Output Configuration	Voltage - Output (Min/Fixed)	Current - Output	Operating Temperature [Max]	Operating Temperature [Min]	PSRR [Min]	PSRR [Max]	Current - Supply (Max) [Max]	Protection Features	Mounting Type	Supplier Device Package	Number of Regulators	Voltage Dropout (Max) [Max]	Control Features	Voltage - Input (Max) [Max]	Qualification	Grade
STMicroelectronics LDS3985M28R	150 çA	SC-74A SOT-753	Positive	2.8 V	300 mA	125 °C	-40 C	50 dB	55 dB	300 µA	Over Current Over Temperature	Surface Mount	SOT-23-5	1	0.25 V	Shutdown	6 V
STMicroelectronics LDS3985M18R	150 çA	SC-74A SOT-753	Positive	1.8 V	300 mA	125 °C	-40 C	50 dB	55 dB	300 µA	Over Current Over Temperature	Surface Mount	SOT-23-5	1	0.25 V	Shutdown	6 V
STMicroelectronics LDS3985PU33R	150 çA	6-VDFN Exposed Pad	Positive	3.3 V	300 mA	125 °C	-40 C	50 dB	55 dB	300 µA	Over Current Over Temperature	Surface Mount	6-DFN (3x3)	1	0.25 V	Shutdown	6 V
STMicroelectronics LDS3985PU33RY	150 çA	6-VDFN Exposed Pad	Positive	3.3 V	300 mA	85 °C	-40 C	50 dB	55 dB	300 µA	Over Current Over Temperature	Surface Mount	6-DFN (3x3)	1	0.25 V	Shutdown	6 V	AEC-Q100	Automotive
STMicroelectronics LDS3985M33R	150 çA	SC-74A SOT-753	Positive	3.3 V	300 mA	125 °C	-40 C	50 dB	55 dB	300 µA	Over Current Over Temperature	Surface Mount	SOT-23-5	1	0.25 V	Shutdown	6 V
STMicroelectronics LDS3985PU18RY	150 çA	6-VDFN Exposed Pad	Positive	1.8 V	300 mA	85 °C	-40 °C	50 dB	55 dB	300 µA	Over Temperature	Surface Mount	6-DFN (3x3)	1	0.25 V	Shutdown	6 V	AEC-Q100	Automotive
STMicroelectronics LDS3985M50R	150 çA	SC-74A SOT-753	Positive	5 V	300 mA	125 °C	-40 C	50 dB	55 dB	300 µA	Over Current Over Temperature	Surface Mount	SOT-23-5	1	0.25 V	Shutdown	6 V
STMicroelectronics LDS3985PU15R	150 çA	6-VDFN Exposed Pad	Positive	1.5 V	300 mA	125 °C	-40 C	50 dB	55 dB	300 µA	Over Current Over Temperature	Surface Mount	6-DFN (3x3)	1	0.25 V	Shutdown	6 V
STMicroelectronics LDS3985M30R	150 çA	SC-74A SOT-753	Positive	3 V	300 mA	125 °C	-40 C	50 dB	55 dB	300 µA	Over Current Over Temperature	Surface Mount	SOT-23-5	1	0.25 V	Shutdown	6 V
STMicroelectronics LDS3985M25R	150 çA	SC-74A SOT-753	Positive	2.5 V	300 mA	125 °C	-40 C	50 dB	55 dB	300 µA	Over Current Over Temperature	Surface Mount	SOT-23-5	1	0.25 V	Shutdown	6 V

Pricing

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

Distributor	Package	Quantity	$

Digikey	N/A	8467	$ 0.85
Newark	Each (Supplied on Cut Tape)	1	$ 0.57
		10	$ 0.42
		25	$ 0.40
		50	$ 0.39
		100	$ 0.37
		250	$ 0.37
		500	$ 0.34
		1000	$ 0.28

Description

General part information

LDS3985 Series

The LDS3985 provides up to 300 mA, from 2.5 V to 6 V input voltage. It is stable with ceramic and high quality tantalum capacitor. The ultra low drop voltage, low quiescent current and low noise make it suitable for low power applications and battery-powered systems. Shutdown logic control function is available, this means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. Typical applications are mobile phones and similar battery-powered wireless systems, portable information appliances.Input voltage from 2.5 V to 6 VStable with low ESR ceramic capacitorsVery low dropout voltage (150 mV typ. at 300 mA load, 0.4 mV typ. at 1 mA load)Very low quiescent current (85 µA typ. at no load, 200 µA typ. at 300 mA load; max.1.5 µA in OFF mode)Guaranteed output current up to 300 mAWide range of output voltages available on request: fixed from 1.25 V to 5 V with 100 mV stepFast turn-on time: typ. 240 µs[CO= 2.2 µF, CBYP= 33 nF and IO= 1 mA]Logic-controlled electronic shutdownInternal current and thermal limitLow output voltage noise: 30 µ VRMSover 10 Hz to 100 kHzSVR of 55 dB at 1 kHz, 50 dB at 10 kHzTemperature range: - 40 °C to 125 °CAutomotive grade product available in DFN6 package, temperature range: - 40 °C to 85 °C

LDS3985M18R

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LDS3985M18R

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Technical Specifications

LDS3985 Series

Pricing

Description

LDS3985 Series

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LDS3985 Series