ST1S14PHR DC-DC Switching Converters by STMicroelectronics

Up to 3 A step-down switching regulator

The ST1S14 is a step-down monolithic power switching regulator able to deliver up to 3 A DC current to the load depending on the application conditions. The high current level is also achieved thanks to a HSOP8 package with exposed frame, that allows to reduce the R th(JA) down to approximately 40 °C/W. The output voltage can be set from 1.22 V. The device uses an internal N-channel DMOS transistor (with a typical R DS(on) of 200 mΩ) as the switching element to minimize the size of the external components. The internal oscillator fixes the switching frequency at 850 kHz. Power good open collector output validates the regulated output voltage as soon as it reaches the regulation. Pulse-by-pulse current limit offers an effective constant current short-circuit protection. Current foldback decreases overstress in a persistent short-circuit condition.

Where to Buy

Prices starting from US$1.12

Distributor Stock
Logo for RS
from US$1.27
in stock
Buy Now
Logo for Future Electronics
Future Electronics
from US$1.12
in stock
Buy Now
Logo for element14
from US$1.38
in stock
Buy Now
Logo for Farnell
from US$1.32
in stock
Buy Now
Logo for Newark Electronics
Newark Electronics
from US$1.29
in stock
Buy Now
Logo for Avnet America
Avnet America
from US$1.22
in stock
Buy Now
Logo for Distrelec
from US$2.02
in stock
Buy Now
Logo for Transfer Multisort Elektronik
Transfer Multisort Elektronik
from US$2.02
in stock
Buy Now
Logo for Chip One Stop
Chip One Stop
from US$1.14
in stock
Buy Now
Logo for Micros
from US$1.39
in stock
Buy Now
Logo for EBV Elektronik
EBV Elektronik
in stock
Buy Now
Logo for Avnet Silica
Avnet Silica
in stock
Buy Now


3 A DC output current
Operating input voltage from 5.5 V to 48 V
850 kHz internally fixed switching frequency
Internal soft-start
Power good open collector output
Current mode architecture
Embedded compensation network
Zero load current operation
Internal current limiting
Inhibit for zero current consumption
2 mA maximum quiescent current over temperature range
250 mΩ typ. RDS(on)
Thermal shutdown

Alternative Descriptions

ST1S14PHR Series 48 V 3 A 1000 kHz SMT Buck Switching Regulator - HSOP-8 | Future Electronics
VOLTAGE REG, BUCK, 3A, 850KHZ, HSOP-8 | element14
Buck Regulators Rohs Compliant: Yes |Stmicroelectronics ST1S14PHR | Newark Electronics
Ideal Diode / ORing Controllers, 4 V to 20 V, 8 Pins, SOIC | Avnet America
ST Switching Voltage Regulator, Step-Down, 3A, 850kHz, HSOP | Distrelec
IC: driver | Transfer Multisort Elektronik
3A Step-Down Switching Regulator HSOP8EP | RS
Step-Down Buck Regulator, Adj, Vin 5.5÷48V, 850kHz, -40÷125°C | Micros

Frequently Asked Questions

Where can I find additional details, specifications and documents for a ST1S14PHR?

Additional datasheets, footprints and schematics for ST1S14PHR are listed on our Part Details page. You can also find images and similar parts to ST1S14PHR on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for ST1S14PHR on our Product Comparison page. Access via the 'View Pricing & Stock' button to view ST1S14PHR price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does ST1S14PHR fall under?

The ST1S14PHR is listed under Power Management > DC-DC Switching Converters > Buck Regulators.

Can I view similar or alternative parts?

You can view similar parts to ST1S14PHR 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 ST1S14PHR you can contact the distributor directly for product support, shipping queries etc.

Is the ST1S14PHR RoHS compliant?

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

Which authorised distributors for ST1S14PHR have stock available?

Authorised distributors including Future Electronics, element14, Farnell, Newark Electronics and Avnet America have stock available or on a lead time for ST1S14PHR.

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

Stock availability and lead times will be displayed for ST1S14PHR often in real-time on the comparison pages.

What if I can't find stock of ST1S14PHR?

You can fill out our help required form which you can use to request a quote for ST1S14PHR from some of our verified obsolescence suppliers. Alternatively, contact us via our web chat in the bottom left of your screen and one of our team will try to help.

We use cookies to improve your experience. See our privacy policy.