ST1S50PUR

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STMicroelectronics

4 A MONOLITHIC SYNCHRONOUS STEP-DOWN CONVERTER WITH HIGH EFFICIENCY AT LIGHT LOAD

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ST1S50PUR

Active

STMicroelectronics

4 A MONOLITHIC SYNCHRONOUS STEP-DOWN CONVERTER WITH HIGH EFFICIENCY AT LIGHT LOAD

Deep-Dive with AI

Documents +6

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	ST1S50PUR

Current - Output	4 A
Frequency - Switching	500 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	150 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	10-VFDFN Exposed Pad
Supplier Device Package	10-VFDFPN (3x3)
Synchronous Rectifier	True
Topology	Buck
Voltage - Input (Max) [Max]	18 V
Voltage - Input (Min) [Min]	4 V
Voltage - Output (Max) [Max]	15.84 V
Voltage - Output (Min/Fixed)	0.8 V

ST1S50 Series

4 A Monolithic synchronous step-down converter with high efficiency at light load

Part	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed)	Package / Case	Output Configuration	Topology	Voltage - Output (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Synchronous Rectifier	Function	Voltage - Input (Max) [Max]	Frequency - Switching	Output Type	Current - Output	Supplier Device Package	Mounting Type	Number of Outputs
STMicroelectronics ST1S50PUR	4 V	0.8 V	10-VFDFN Exposed Pad	Positive	Buck	15.84 V	150 °C	-40 °C		Step-Down	18 V	500 kHz	Adjustable	4 A	10-VFDFPN (3x3)	Surface Mount	1

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	$ 2.24
		10	$ 2.01
		25	$ 1.90
		100	$ 1.62
		250	$ 1.52
		500	$ 1.33
		1000	$ 1.10
	Digi-Reel®	1	$ 2.24
		10	$ 2.01
		25	$ 1.90
		100	$ 1.62
		250	$ 1.52
		500	$ 1.33
		1000	$ 1.10
	Tape & Reel (TR)	3000	$ 0.94

Description

General part information

ST1S50 Series

The ST1S50 device is a 500 kHz fixed frequency PWM synchronous step-down regulator. The ST1S50 operates from 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to 0.88 x VIN.

The ST1S50 device integrates a 95 mΩ high-side switch and a 69 mΩ synchronous rectifier allowing very high efficiency with very low output voltages.

The peak current mode control with a special PFM mode enables high efficiency at a light load.