L5973AD

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2 A switch step down switching regulator

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Product overview

Description

The L5973AD is a step down monolithic power switching regulator with a switch current limit of 2A so it is able to deliver more than 1.5 A DC current to the load depending on the application conditions.

The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an SO8 package with exposed frame, that allows to reduce the RthJA down to approximately 40 °C/W.

The device uses an internal P-Channel D-MOS transistor (with a typical of 200 mΩ) as switching element to avoid the use of bootstrap capacitor and guarantee high efficiency.

An internal oscillator fixes the switching frequency at 500 kHz to minimize the size of external components.

Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V bus, available in all computer related applications.

Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection.

  • All features

    • Inhibit for zero current consumption
    • Internal current limiting
    • Protection against feedback disconnection
    • Synchronization
    • Thermal shutdown
    • Voltage feedforward
    • 500 kHz Internally fixed frequency
    • 2 A Internal switch
    • 3.3 V / (±2 %) reference voltage
    • Operating input voltage from 4 V to 36 V
    • Low dropout operation: 100 % duty cycle
    • Zero load current operation
    • Output voltage adjustable from 1.235 V to 35 V

Circuit Diagram

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Output
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Output Power: 0

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STMicroelectronics - L5973AD

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L5973AD
Active
PowerSO-8 Industrial Ecopack2
L5973ADTR
Active
PowerSO-8 Industrial Ecopack2

L5973AD

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L5973ADTR

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

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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ECCN (US)
ECCN (EU)
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Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
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L5973AD Available at distributors

Distributor availability of L5973AD

Distributor Name
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Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tube PowerSO-8 -40 150 PHILIPPINES
L5973ADTR Available at distributors

Distributor availability of L5973ADTR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape and Reel PowerSO-8 -40 150 PHILIPPINES

L5973AD Active

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

Part Number:

L5973AD

ECCN (EU):

NEC

Packing Type:

Tube

Operating Temperature (°C)

Min:

-40

Max:

150

Country of Origin:

PHILIPPINES

Distributor Name

Distributor reported inventory date:

L5973ADTR Active

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

Part Number:

L5973ADTR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

150

Country of Origin:

PHILIPPINES

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