ST1S41

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4 A step-down switching regulator

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Product overview

Description

The ST1S41 is an internally compensated 850 kHz fixed-frequency PWM synchronous step-down regulator. The ST1S41 operates from 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to VIN.

The ST1S41 integrates 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 ST1S41 is available in VFQFPN 4 mm x 4 mm 8-lead package and HSOP-8.

  • All features

    • 4 A 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 foldback short-circuit protection
    • VFQFPN 4x4-8L and HSOP-8 packages

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STMicroelectronics - ST1S41

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST1S41PHR
Active
PowerSO-8 Industrial Ecopack2
ST1S41PUR
Active
DFN8 4x4 Industrial Ecopack2

ST1S41PHR

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

ST1S41PUR

Package:

DFN8 4x4

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN8 4x4

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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ST1S41PUR Active

Package:
DFN8 4x4
ECCN (US):
EAR99
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-

Part Number:

ST1S41PUR

ECCN (EU):

NEC

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-

Max:

-

Country of Origin:

MALAYSIA

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ST1S41PHR Active

Package:
PowerSO-8
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

ST1S41PHR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

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-

Max:

-

Country of Origin:

PHILIPPINES

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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors