ST1S40IPUR DC-DC Switching Converters by STMicroelectronics

3 A DC step-down switching regulator


The ST1S40 is an internally compensated 850 kHz fixed-frequency PWM synchronous step-down regulator. ST1S40 operates from 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to V IN . The ST1S40 integrates a 95 mΩ high side switch and 69 mΩ synchronous rectifier allowing very high efficiency with very low output voltages. The peak current mode control with internal compensation delivers a very compact solution with a minimum component count. The ST1S40 is available in VFQFPN 4 mm x 4 mm 8 lead package, HSOP-8 and standard SO-8 package.

Where to Buy

Prices starting from US$1.08

Distributor Stock
Logo for Farnell
Farnell
from US$1.40
11,113
in stock
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Logo for Future Electronics
Future Electronics
from US$1.08
13,500
in stock
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Logo for element14
element14
from US$1.41
11,113
in stock
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Logo for Chip One Stop
Chip One Stop
from US$1.14
4,500
in stock
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Logo for Avnet America
Avnet America
from US$1.22
-
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Logo for Newark Electronics
Newark Electronics
-
-
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Logo for EBV Elektronik
EBV Elektronik
-
-
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Logo for Avnet Silica
Avnet Silica
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Features

3 A DC output current
4.0 V to 18 V input voltage
Output voltage adjustable from 0.8 V
850 kHz switching frequency
Internal soft-start
Integrated 95 mΩ and 69 mΩ Power MOSFETs
All ceramic capacitor
Enable
Cycle-by-cycle current limiting
Current fold back short-circuit protection
VFQFPN4x4-8L, HSOP-8, and SO-8 and packages

Alternative Descriptions

ST1S40 Series 18 V 3 A 850 kHz SMT DC Step-Down Switching Regulator - VFQFPN-8 | Future Electronics
VOLTAGE REG, BUCK, 3A, 850KHZ, VFQFPN-8 | element14
Conv DC-DC Single Step Down 4V to 18V 8-Pin VFQFP EP | Avnet America
Dc-Dc Converters Rohs Compliant: Yes |Stmicroelectronics ST1S40IPUR | Newark Electronics


Frequently Asked Questions

Where can I find additional details, specifications and documents for a ST1S40IPUR?

Additional datasheets, footprints and schematics for ST1S40IPUR are listed on our Part Details page. You can also find images and similar parts to ST1S40IPUR on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for ST1S40IPUR on our Product Comparison page. Access via the 'View Pricing & Stock' button to view ST1S40IPUR price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does ST1S40IPUR fall under?

The ST1S40IPUR is listed under Power Management > DC-DC Switching Converters > Buck Regulators.

Can I view similar or alternative parts?

You can view similar parts to ST1S40IPUR when available in the Buck Regulators range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the ST1S40IPUR you can contact the distributor directly for product support, shipping queries etc.

Is the ST1S40IPUR RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by STMicroelectronics.

Which authorised distributors for ST1S40IPUR have stock available?

Authorised distributors including Future Electronics, element14, Farnell, Chip One Stop and Avnet America have stock available or on a lead time for ST1S40IPUR.

How do I check stock and lead times for all distributors?

Stock availability and lead times will be displayed for ST1S40IPUR often in real-time on the comparison pages.

What if I can't find stock of ST1S40IPUR?

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