The device is stabilized with a small ceramic capacitor on the output. The low drop, low quiescent current, and short-circuit protection make the LDQ40 suitable for low-power battery-operated applications.

Technical Specifications

Parameters and characteristics for this part

Specification	LDQ40PU18RY

Control Features	Enable, Current Limit
Current - Output	250 mA
Current - Quiescent (Iq)	5 µA
Current - Supply (Max)	500 µA
Grade	Automotive
Mounting Type	Surface Mount
Number of Regulators	1
Operating Temperature (Max)	150 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Fixed
Package / Case	6-WDFN Exposed Pad
Package Length	2 mm
Package Name	6-DFN
Package Width	2 mm
Protection Features	Over Current, Short Circuit, Over Temperature
PSRR	55 dB
Qualification	AEC-Q100
Voltage - Input (Max)	40 V
Voltage - Output (Min/Fixed)	1.8 V
Voltage Dropout (Max)	1 V

LDQ40 Series

250 mA low dropout LDO

Part	Voltage - Output (Min/Fixed)	PSRR	Current - Supply (Max)	Control Features	Current - Quiescent (Iq)	Output Type	Mounting Type	Package Length	Package Name	Package Width	Qualification	Voltage Dropout (Max)	Voltage - Input (Max)	Protection Features	Output Configuration	Operating Temperature (Min)	Operating Temperature (Max)	Grade	Number of Regulators	Package / Case	Current - Output	Voltage - Output (Max)
STMicroelectronics LDQ40PU33RY	3.3 V	55 dB	500 µA	Current Limit Enable	5 µA	Fixed	Surface Mount	2 mm	6-DFN	2 mm	AEC-Q100	1 V	40 V	Over Current Over Temperature Short Circuit	Positive	-40 °C	150 °C	Automotive	1	6-WDFN Exposed Pad	250 mA
STMicroelectronics LDQ40PU18RY	1.8 V	55 dB	500 µA	Current Limit Enable	5 µA	Fixed	Surface Mount	2 mm	6-DFN	2 mm	AEC-Q100	1 V	40 V	Over Current Over Temperature Short Circuit	Positive	-40 °C	150 °C	Automotive	1	6-WDFN Exposed Pad	250 mA
STMicroelectronics LDQ40PU50RY	5 V	55 dB	500 µA	Current Limit Enable	5 µA	Fixed	Surface Mount	2 mm	6-DFN	2 mm	AEC-Q100	1 V	40 V	Over Current Over Temperature Short Circuit	Positive	-40 °C	150 °C	Automotive	1	6-WDFN Exposed Pad	250 mA
STMicroelectronics LDQ40PUR
STMicroelectronics LDQ40PU25RY	2.5 V	55 dB	500 µA	Current Limit Enable	5 µA	Fixed	Surface Mount	2 mm	6-DFN	2 mm	AEC-Q100	1 V	40 V	Over Current Over Temperature Short Circuit	Positive	-40 °C	150 °C	Automotive	1	6-WDFN Exposed Pad	250 mA
STMicroelectronics LDQ40PURY	1.2 V	60 dB	500 µA	Current Limit Enable	5 µA	Adjustable	Surface Mount	2 mm	6-DFN	2 mm	AEC-Q100	1 V	40 V	Over Current Over Temperature Short Circuit	Positive	-40 °C	150 °C	Automotive	1	6-WDFN Exposed Pad	250 mA	12 V

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Datasheet

LDQ40PU18RY | Datasheet

Technical Data Sheet EN