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STMicroelectronics ST1S09PUR — Discrete Semiconductors
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RoHS Compliant · Lead-Free EIA-481 Standard
STMicroelectronics / Discrete Semiconductors

STMicroelectronics ST1S09PUR Buck Regulator, 2A, 1.5MHz

MPN ST1S09PUR
End of Life Spot Stock · 24-48h Dispatch 100% Original Sealed

STMicroelectronics ST1S09PUR, step-down (buck) switching regulator, adjustable output, 2 A, 1.5 MHz, synchronous rectifier, 6-VDFN exposed pad (3x3 mm), surface mount, Tape & Reel / Cut Tape.

In Stock: 718 pcs
MOQ: 1 pcs
Logistics: DHL / FedEx DAP (Global Express · 3-7d) Russia & CIS DDP (Door-to-Door Cleared)
Dispatch: Shenzhen / HK
Unit Price (USD)
$1.84 / pc
Direct Purchase Ready
Volume Pricing Breaks Confirmed upon quotation
1+ pcs
$1.84
10+ pcs
$1.49
30+ pcs
$1.29
100+ pcs
$1.07
500+ pcs
$0.98
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$1.84 / ea

718 in stock — maximum per order · 3–4 days lead time

$1.49 / ea from 10 pcs
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100% Original Sealed 45x Microscope QC 30-Day Warranty · COC USD T/T & PI · DAP/DDP
[SPEC] Essential Parameters Snapshot Full Specifications (15)
Package / Case 6-VDFN Exposed Pad

Full Technical Specifications

15 Parameters
ST1S09PUR specifications
Parameter / AttributeSpecification / Value
Output typeAdjustable
MountingSurface Mount
Voltage - input2.7V
Voltage - output5.22V
Voltage - output (Min (Fixed))0.8V
Output current2A
Frequency - switching1.5MHz
I/O channels1
Operating temperature-30°C ~ 85°C (TJ)
PackageTape & Reel (TR); Cut Tape (CT)
FunctionStep-Down
TopologyBuck
Case6-VDFN Exposed Pad
Output configurationPositive
Synchronous rectifierYes
[DESK] Shenzhen Spot Allocation · 2h Response

Need Immediate Spot Stock or Shortage Allocation for ST1S09PUR?

Factory lead times blocking production? We lock verified brand-new original stock in Shenzhen within 2 hours.

Quote SLA 2 Hours
[01] Emergency Shortage 24-48h Shenzhen Dispatch

Direct access to Shenzhen floor inventory, franchised allocation buffers, and factory bonded stock to resolve line-down shutdowns.

[02] Industrial Packaging Tape & Reel / Tray / Tube

Standard factory-sealed packaging compliant with EIA-481 standards for automated high-speed SMT pick-and-place lines.

[03] WhatsApp QC Proof 45x Microscope QC Photos

High-resolution photos of original reel labels, 2D DataMatrix, and pin coplanarity sent via WhatsApp/Telegram before you release wire payment.

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Technical Details & Description

Package and board-fit — 6-DFN with exposed pad

The ST1S09PUR: Operating temperature range is -30 °C to 85 °C junction — this is the commercial/industrial band; it will not survive an engine bay but is fine for indoor equipment, telecom cabinets, and portable devices. Available in Tape & Reel (standard 3000-piece reel) or Cut Tape for prototyping — the same order code covers both packaging options.

Compliance and sourcing posture

ROHS3 compliant (no exemptions for lead in solder or PBB/PBDE flame retardants), so it passes EU RoHS and similar restricted-material regulations without a waiver.

Frequently asked questions

Is ST1S09PUR RoHS compliant?

Yes, it is ROHS3 compliant, meaning it meets the latest EU RoHS restrictions without exemptions.

What is the difference between ST1S09PUR and ST1S09IPUR?

The ST1S09IPUR is the industrial-temperature variant of the same die — same 2 A output, same 1.5 MHz switching frequency, same 6-DFN package. For ambient-temperature designs below 85 °C, the PUR is functionally identical at a lower cost point.

How can I order ST1S09PUR or check current pricing?

Submit an RFQ for current pricing, lead time, and availability confirmation.

ST1S09PUR
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