ST1S12XX

Active

Synchronous rectification with enable, 0.7 A, 1.7 MHz fixed or adjustable step-down switching regulator in TSOT23-5L

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Product overview

Description

The ST1S12 is a step down DC-DC converter optimized for powering low-voltage digital cores in HDD applications and, generally, to replace the high current linear solution when the power dissipation may cause high heating of the application environment. It provides up to 0.7 A over an input voltage range of 2.5 V to 5.5 V. A high switching frequency (1.7 MHz) allows the use of tiny surface-mount components. In addition to the resistor divider to set the output voltage value, only an inductor and two capacitors are required. Moreover, a low output ripple is guaranteed by the current mode PWM topology and by the use of low ESR SMD ceramic capacitors. The device is thermally protected and the current is limited to prevent damage due to accidental short-circuit. The ST1S12 is available in the TSOT23-5L package.
  • All features

    • Step-down current mode PWM (1.7 MHz) DC-DC converter
    • 3% DC output voltage tolerance
    • Synchronous rectification
    • Fixed output voltage 1.2 V, 1.8 V, and ADJ (available on request 1.5 V, 2.5 V and 3.3 V)
    • Enable function
    • Internal soft start
    • Typical efficiency: > 90%
    • 0.7 A output current capability
    • Not switching quiescent current: max 650 μA over temperature range
    • RDSONtyp. 250 mΩ and 400 mΩ
    • Uses tiny capacitors and inductors
    • Operative junction temp. -40 °C to 125 °C
    • Available in TSOT23-5L package

Circuit Diagram

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All tools & software

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      STEVAL-ISA055V1

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      STEVAL-ISA055V1

      Description:

      0.7 A / 1.2 V synchronous buck converter with enable function based on the ST1S12XX

      STEVAL-ISA055V2

      Active

      0.7 A / 3.3 V synchronous buck converter with enable function based on the ST1S12XX

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      Description:

      0.7 A / 3.3 V synchronous buck converter with enable function based on the ST1S12XX

EDA Symbols, Footprints and 3D Models

STMicroelectronics - ST1S12XX

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST1S12G12R
Active
TSOT23-5L Industrial Ecopack2
ST1S12G18R
Active
TSOT23-5L Industrial Ecopack2
ST1S12GR
Active
TSOT23-5L Industrial Ecopack2

ST1S12G12R

Package:

TSOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TSOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

ST1S12G18R

Package:

TSOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TSOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

ST1S12GR

Package:

TSOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TSOT23-5L

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.

Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output Power

V This option is required and must be a number.
A This option is required and must be a number.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
ST1S12G18R Available at 1 distributors

Distributor availability ofST1S12G18R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 885 1 Order Now

Distributor reported inventory date: 2021-08-04

Distributor Name

DIGIKEY

Stock

885

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-08-04

Active
EAR99 NEC Tape And Reel TSOT23-5L -40 125 MALAYSIA 0.3773 / 1k
ST1S12GR Available at 1 distributors

Distributor availability ofST1S12GR

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 59 1 Order Now

Distributor reported inventory date: 2021-08-04

Distributor Name

Farnell Element14

Stock

59

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-08-04

Active
EAR99 NEC Tape And Reel TSOT23-5L -40 125 MALAYSIA 0.3773 / 1k
ST1S12G12R Available at 1 distributors

Distributor availability ofST1S12G12R

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 86 1 Order Now

Distributor reported inventory date: 2021-08-04

Distributor Name

Farnell Element14

Stock

86

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-08-04

Active
EAR99 NEC Tape And Reel TSOT23-5L -40 125 MALAYSIA 0.3773 / 1k

ST1S12G18R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.3773 / 1k

Distributor availability ofST1S12G18R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 885 1 Order Now

Distributor reported inventory date: 2021-08-04

Distributor Name

DIGIKEY

Stock

885

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-08-04

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

TSOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.3773 / 1k

Country of Origin

MALAYSIA

ST1S12GR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.3773 / 1k

Distributor availability ofST1S12GR

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 59 1 Order Now

Distributor reported inventory date: 2021-08-04

Distributor Name

Farnell Element14

Stock

59

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-08-04

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

TSOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.3773 / 1k

Country of Origin

MALAYSIA

ST1S12G12R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.3773 / 1k

Distributor availability ofST1S12G12R

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 86 1 Order Now

Distributor reported inventory date: 2021-08-04

Distributor Name

Farnell Element14

Stock

86

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-08-04

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

TSOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.3773 / 1k

Country of Origin

MALAYSIA

(*) 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