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  • The SG3525A series of pulse width modulator integrated circuits are designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip + 5.1 V reference is trimmed to ±1 % and the input common-mode range of the error amplifier includes the reference voltage eliminating external resistors. A sync input to the oscillator allows multiple units to be slaved or a single unit to be synchronized to an external system clock. A single resistor between the CT and the discharge terminals provide a wide range of dead time ad- justment.These devices also feature built-in soft-start circuitry with only an external timing capacitor required. A shutdown terminal controls both the soft-start circuity and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown,as well as soft-start recycle with longer shutdown commands. These functions are also controlled by an undervoltage lockout which keeps the outputs off and the soft-start capacitor discharged for sub-normal input voltages. This lockout circuitry includes approximately 500 mV of hysteresis for jitter-free operation. Another feature of these PWM circuits is a latch following the comparator. Once a PWM pulses has been terminated for any reason,the outputs will remain off for the duration of the period. The latch is reset with each clock pulse. The output stages are totem-pole designs capable of sourcing or sinking in excess of 200 mA. The SG3525A output stage features NOR logic, giving a LOW output for an OFF state.

    Key Features

    • DUAL SOURCE/SINK OUTPUT DRIVERS
    • LATCHING PWM TO PREVENT MULTIPLE PULSES
    • PULSE-BY-PULSE SHUTDOWN
    • INTERNAL SOFT-START
    • 8 TO 35 V OPERATION
    • 100 Hz TO 500 KHz OSCILLATOR RANGE
    • 5.1 V REFERENCE TRIMMED TO ± 1 %
    • ADJUSTABLE DEADTIME CONTROL
    • INPUT UNDERVOLTAGE LOCKOUT WITH HYSTERESIS
    • SEPARATE OSCILLATOR SYNC TERMINAL

Circuit Diagram

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Publications and Collaterals

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
SG3525AN
Active
PDIP 16 Industrial Ecopack2
SG3525AP
Active
SO-16 Industrial Ecopack2
SG3525AP013TR
Active
SO-16 Industrial Ecopack2

SG3525AN

Package:

PDIP 16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PDIP 16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

SG3525AP

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

SG3525AP013TR

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-16

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

Part Number
Order from Distributors
Order from ST
Package
Packing Type
Marketing Status
ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
SG3525AN Available at 11 distributors

Distributor availability ofSG3525AN

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2226 1 Order Now
COMPEL EUROPE 116 1 Order Now
RS COMPONENTS EUROPE 595 10 Order Now
AVNET AMERICA 1280 0 Order Now
FUTURE WORLDWIDE 1297 1 Order Now
ARROW EUROPE 850 0 Order Now
Newark Element14 AMERICA 497 0 Order Now
ARROW AMERICA 746 1000 Order Now
MOUSER WORLDWIDE 2262 1 Order Now
Farnell Element14 EUROPE 364 1 Order Now
ANGLIA Live EUROPE 983 1 Order Now

Distributor reported inventory date: 2020-07-02

Distributor Name

DIGIKEY

Stock

2226

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

116

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

595

Min.Order

10

Region

EUROPE Order Now

AVNET

Stock

1280

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

1297

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

850

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

497

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

746

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

2262

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

364

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

983

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-02

Buy now PDIP 16 Tube
Active
EAR99 CHINA 0.6384 / 1k
SG3525AP013TR Available at 5 distributors

Distributor availability ofSG3525AP013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1103 1 Order Now
RS COMPONENTS EUROPE 2425 1 Order Now
Newark Element14 AMERICA 425 0 Order Now
MOUSER WORLDWIDE 98 1 Order Now
Farnell Element14 EUROPE 17 1 Order Now

Distributor reported inventory date: 2020-07-02

Distributor Name

DIGIKEY

Stock

1103

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2425

Min.Order

1

Region

EUROPE Order Now

Newark Element14

Stock

425

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

98

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

17

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-02

Buy now SO-16 Tape And Reel
Active
EAR99 CHINA 0.6384 / 1k
SG3525AP Available at 8 distributors

Distributor availability ofSG3525AP

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2055 1 Order Now
COMPEL EUROPE 297 1 Order Now
RS COMPONENTS EUROPE 1444 2 Order Now
ARROW EUROPE 1400 0 Order Now
Newark Element14 AMERICA 3 0 Order Now
MOUSER WORLDWIDE 2132 1 Order Now
Farnell Element14 EUROPE 1572 1 Order Now
ANGLIA Live EUROPE 1080 1 Order Now

Distributor reported inventory date: 2020-07-02

Distributor Name

DIGIKEY

Stock

2055

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

297

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

1444

Min.Order

2

Region

EUROPE Order Now

ARROW

Stock

1400

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

3

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2132

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1572

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

1080

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-02

Buy now SO-16 Tube
Active
EAR99 CHINA 0.6384 / 1k

SG3525AN

Package

PDIP 16

Packing Type

Tube

Budgetary Price (US$)*/Qty

0.6384 / 1k

Distributor availability ofSG3525AN

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2226 1 Order Now
COMPEL EUROPE 116 1 Order Now
RS COMPONENTS EUROPE 595 10 Order Now
AVNET AMERICA 1280 0 Order Now
FUTURE WORLDWIDE 1297 1 Order Now
ARROW EUROPE 850 0 Order Now
Newark Element14 AMERICA 497 0 Order Now
ARROW AMERICA 746 1000 Order Now
MOUSER WORLDWIDE 2262 1 Order Now
Farnell Element14 EUROPE 364 1 Order Now
ANGLIA Live EUROPE 983 1 Order Now

Distributor reported inventory date: 2020-07-02

Distributor Name

DIGIKEY

Stock

2226

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

116

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

595

Min.Order

10

Region

EUROPE Order Now

AVNET

Stock

1280

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

1297

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

850

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

497

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

746

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

2262

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

364

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

983

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-02

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.6384 / 1k

ECCN (US)

EAR99

Country of Origin

CHINA

SG3525AP013TR

Package

SO-16

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.6384 / 1k

Distributor availability ofSG3525AP013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1103 1 Order Now
RS COMPONENTS EUROPE 2425 1 Order Now
Newark Element14 AMERICA 425 0 Order Now
MOUSER WORLDWIDE 98 1 Order Now
Farnell Element14 EUROPE 17 1 Order Now

Distributor reported inventory date: 2020-07-02

Distributor Name

DIGIKEY

Stock

1103

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2425

Min.Order

1

Region

EUROPE Order Now

Newark Element14

Stock

425

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

98

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

17

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-02

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.6384 / 1k

ECCN (US)

EAR99

Country of Origin

CHINA

SG3525AP

Package

SO-16

Packing Type

Tube

Budgetary Price (US$)*/Qty

0.6384 / 1k

Distributor availability ofSG3525AP

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2055 1 Order Now
COMPEL EUROPE 297 1 Order Now
RS COMPONENTS EUROPE 1444 2 Order Now
ARROW EUROPE 1400 0 Order Now
Newark Element14 AMERICA 3 0 Order Now
MOUSER WORLDWIDE 2132 1 Order Now
Farnell Element14 EUROPE 1572 1 Order Now
ANGLIA Live EUROPE 1080 1 Order Now

Distributor reported inventory date: 2020-07-02

Distributor Name

DIGIKEY

Stock

2055

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

297

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

1444

Min.Order

2

Region

EUROPE Order Now

ARROW

Stock

1400

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

3

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2132

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1572

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

1080

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-02

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.6384 / 1k

ECCN (US)

EAR99

Country of Origin

CHINA

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