ST1S10

NRND
Design Win

3 A, 900 kHz, monolithic synchronous step-down regulator IC

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Product overview

Description

The ST1S10 is a high efficiency step-down PWM current mode switching regulator capable of providing up to 3 A of output current. The device operates with an input supply range from 2.5 V to 18 V and provides an adjustable output voltage from 0.8 V (VFB) to 0.85 * VIN_SW[VOUT= VFB * (1 + R1/R2)]. It operates either at a 900 kHz fixed frequency or can be synchronized to an external clock (from 400 kHz to 1.2 MHz). The high switching frequency allows the use of tiny SMD external components, while the integrated synchronous rectifier eliminates the need for a Schottky diode. The ST1S10 provides excellent transient response, and is fully protected against thermal overheating, switching overcurrent and output short-circuit.

The ST1S10 is the ideal choice for point of load regulators or LDO pre-regulation.

  • All features

    • Step-down current mode PWM regulator
    • Output voltage adjustable from 0.8 V
    • Input voltage from 2.5 V up to 18 V
    • 2% DC output voltage tolerance
    • Synchronous rectification
    • Inhibit function
    • Synchronizable switching frequency from 400 kHz up to 1.2 MHz
    • Internal soft start
    • Dynamic short-circuit protection
    • Typical efficiency: 90%
    • 3 A output current capability
    • Standby supply current: max. 6 μA over temperature range
    • Operative junction temp.: from -40 °C to 125 °C

Circuit Diagram

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STMicroelectronics - ST1S10

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST1S10PHR
NRND
PowerSO-8 Industrial Ecopack2
ST1S10PUR
NRND
DFN8 4x4 Industrial Ecopack2

ST1S10PHR

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

NRND

Package

PowerSO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

ST1S10PUR

Package:

DFN8 4x4

Material Declaration**:

PDF XML

Marketing Status

NRND

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.

Sample & Buy

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ST1S10PHR Available at distributors

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NRND
EAR99 NEC Tape and Reel PowerSO-8 -25 125 CHINA
ST1S10PUR Available at distributors

Distributor availability of ST1S10PUR

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Region Stock Min. Order Third party link

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NRND
EAR99 NEC Tape and Reel DFN8 4x4 -25 125 MALAYSIA

ST1S10PHR NRND

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

Part Number:

ST1S10PHR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-25

Max:

125

Country of Origin:

CHINA

Distributor Name

Distributor reported inventory date:

ST1S10PUR NRND

Package:
DFN8 4x4
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

ST1S10PUR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-25

Max:

125

Country of Origin:

MALAYSIA

Distributor Name

Distributor reported inventory date:

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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