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  • The A5973AD is a step-down monolithic power switching regulator with a minimum switch current limit of 1.8 A, so it is able to deliver up to 1.5 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to VIN. The high current level is also achieved thanks to an HSOP8 package with an exposed frame, that allows to reduce the Rth(JA)down to approximately 40 °C/W. The device uses an internal P-channel DMOS transistor (with a typical RDS(on)of 250 mΩ) as a switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency at 500 kHz. Having a minimum input voltage of 4 V only it fits the automotive applications requiring the device operation even in cold crank conditions. A pulse-by-pulse current limit with the internal frequency modulation offers an effective constant current short-circuit protection.

    Key Features

    • Qualified following the AEC-Q100 requirements (see PPAP for more details)
    • 1.5 A DC output current
    • Operating input voltage from 4 V to 36 V
    • 3.3 V / (± 2%) reference voltage
    • Output voltage adjustable from 1.235 V to VIN
    • Low dropout operation: 100% duty cycle
    • 500 kHz internally fixed frequency
    • Voltage feed-forward
    • Zero load current operation
    • Internal current limiting
    • Inhibit for zero current consumption
    • Synchronization
    • Protection against feedback disconnection
    • Thermal shutdown

Circuit Diagram

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STMicroelectronics - A5973AD

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
A5973AD
Active
PowerSO-8 Automotive Ecopack2
A5973ADTR
Active
PowerSO-8 Automotive Ecopack2

A5973AD

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

Grade

Automotive

RoHS Compliance Grade

Ecopack2

A5973ADTR

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

Grade

Automotive

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.

eDesignSuite

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

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

LED Driver

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]

LED custom

V This option is required.
A This option is required.
Ω This option is required.

LEDs

This option is required. And must be a whole positive number between 1 and 20.
This option is required. And must be a whole positive number between 1 and 20.

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
A5973AD Available at 1 distributors

Distributor availability ofA5973AD

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 1975 1 Order Now

Distributor reported inventory date: 2020-10-27

Distributor Name

MOUSER

Stock

1975

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-27

Buy Direct
Active
EAR99 NEC Tube PowerSO-8 -40 125 PHILIPPINES 1.425 / 1k
A5973ADTR Available at 2 distributors

Distributor availability ofA5973ADTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 145 1 Order Now
RS COMPONENTS EUROPE 2258 1 Order Now

Distributor reported inventory date: 2020-10-27

Distributor Name

DIGIKEY

Stock

145

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2258

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-27

Active
EAR99 NEC Tape And Reel PowerSO-8 -40 125 PHILIPPINES 1.425 / 1k

A5973AD

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.425 / 1k

Distributor availability ofA5973AD

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 1975 1 Order Now

Distributor reported inventory date: 2020-10-27

Distributor Name

MOUSER

Stock

1975

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-27

ECCN (EU)

NEC

Packing Type

Tube

Package

PowerSO-8

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

1.425 / 1k

Country of Origin

PHILIPPINES

A5973ADTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.425 / 1k

Distributor availability ofA5973ADTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 145 1 Order Now
RS COMPONENTS EUROPE 2258 1 Order Now

Distributor reported inventory date: 2020-10-27

Distributor Name

DIGIKEY

Stock

145

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2258

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-27

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

PowerSO-8

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

1.425 / 1k

Country of Origin

PHILIPPINES

(*) 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