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Allegro MicroSystems Inc. Triple Output Step Down Switching Regulator A4490EESTR-T

Description
Designed to provide the power supply requirements of printers, office automation, industrial, and portable equipment, the A4490 provides three high current, high performance, switching regulator outputs with independent soft start. High frequency switching allows selection of inexpensive inductors and small ceramic output capacitors. The turn-on cycles of the regulators are interleaved to minimize stresses on the input capacitors and to reduce EMI. A charge pump is used to provide the supply for driving the power switches, ensuring operation at very wide operating duty cycles and avoiding the need for power-draining clamp circuits. A power-on-reset circuit with user configurable delay indicates when enabled regulators are in specification. The power-on reset flag also indicates when the input voltage drops below specification, giving the system controller advance warning while the switchers continue to operate down to the shutdown level. Internal diagnostics provide comprehensive protection against overloads, input undervoltages, and overtemperatures. The A4490 is provided in a 20-contact, 4 mm × 4 mm, 0.75 mm nominal overall height QFN, with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe plating.
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Suppliers

Company
Product
Description
Supplier Links
Triple Output Step Down Switching Regulator - A4490EESTR-T - Allegro MicroSystems Inc.
Manchester, NH, United States
Triple Output Step Down Switching Regulator
A4490EESTR-T
Triple Output Step Down Switching Regulator A4490EESTR-T
Designed to provide the power supply requirements of printers, office automation, industrial, and portable equipment, the A4490 provides three high current, high performance, switching regulator outputs with independent soft start. High frequency switching allows selection of inexpensive inductors and small ceramic output capacitors. The turn-on cycles of the regulators are interleaved to minimize stresses on the input capacitors and to reduce EMI. A charge pump is used to provide the supply for driving the power switches, ensuring operation at very wide operating duty cycles and avoiding the need for power-draining clamp circuits. A power-on-reset circuit with user configurable delay indicates when enabled regulators are in specification. The power-on reset flag also indicates when the input voltage drops below specification, giving the system controller advance warning while the switchers continue to operate down to the shutdown level. Internal diagnostics provide comprehensive protection against overloads, input undervoltages, and overtemperatures. The A4490 is provided in a 20-contact, 4 mm × 4 mm, 0.75 mm nominal overall height QFN, with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe plating.

Designed to provide the power supply requirements of printers, office automation, industrial, and portable equipment, the A4490 provides three high current, high performance, switching regulator outputs with independent soft start.

High frequency switching allows selection of inexpensive inductors and small ceramic output capacitors. The turn-on cycles of the regulators are interleaved to minimize stresses on the input capacitors and to reduce EMI. A charge pump is used to provide the supply for driving the power switches, ensuring operation at very wide operating duty cycles and avoiding the need for power-draining clamp circuits.

A power-on-reset circuit with user configurable delay indicates when enabled regulators are in specification. The power-on reset flag also indicates when the input voltage drops below specification, giving the system controller advance warning while the switchers continue to operate down to the shutdown level.

Internal diagnostics provide comprehensive protection against overloads, input undervoltages, and overtemperatures. The A4490 is provided in a 20-contact, 4 mm × 4 mm, 0.75 mm nominal overall height QFN, with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe plating.

Supplier's Site Datasheet
Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators - A4490EESTR-T - Shenzhen Shengyu Electronics Technology Limited
Futian, China
Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators
A4490EESTR-T
Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators A4490EESTR-T
IC REG BUCK ADJ TRPL 20QFN

IC REG BUCK ADJ TRPL 20QFN

Supplier's Site
Integrated Circuits - A4490EESTR-T - LIXINC Electronics Co., Limited
Hong Kong, China
Integrated Circuits
A4490EESTR-T
Integrated Circuits A4490EESTR-T
IC REG BUCK ADJ TRPL 20QFN

IC REG BUCK ADJ TRPL 20QFN

Supplier's Site Datasheet
PMIC - PMIC - Voltage Regulators - DCDC Switching Regulators - A4490EESTR-T - 007709-A4490EESTR-T - Win Source Electronics
Yishun, Singapore
PMIC - PMIC - Voltage Regulators - DCDC Switching Regulators - A4490EESTR-T
007709-A4490EESTR-T
PMIC - PMIC - Voltage Regulators - DCDC Switching Regulators - A4490EESTR-T 007709-A4490EESTR-T
Manufacturer: Allegro MicroSystems, LLC Win Source Part Number: 007709-A4490EESTR-T Packaging: Reel - TR Mounting: SMD (SMT) Output Type: Adjustable Topology: Buck Frequency - Switching: 550kHz Number of Outputs: 3 Synchronous Rectifier: No Family Name: A4490 Categories: Integrated Circuits Status: Active Temperature Range - Operating: -40°C to 85°C (TA) Case / Package: 20-QFN (4x4) Purpose: Step-Down Maximum Input Voltage: 34V Nominal Output Voltage (Min/Fixed): 0.8V Maximum Output Voltage: 30.6V Minimum Input Voltage: 4.5V Alternative Parts (Cross-Reference): A4490EES-T; A4490SESTR-T; Introduction Date: March 21, 2008 Estimated EOL Date: 2023 Is this a common-used part?: Yes Popularity: High Fake Threat In the Open Market: 31 pct. Supply and Demand Status: Balance

Manufacturer: Allegro MicroSystems, LLC
Win Source Part Number: 007709-A4490EESTR-T
Packaging: Reel - TR
Mounting: SMD (SMT)
Output Type: Adjustable
Topology: Buck
Frequency - Switching: 550kHz
Number of Outputs: 3
Synchronous Rectifier: No
Family Name: A4490
Categories: Integrated Circuits
Status: Active
Temperature Range - Operating: -40°C to 85°C (TA)
Case / Package: 20-QFN (4x4)
Purpose: Step-Down
Maximum Input Voltage: 34V
Nominal Output Voltage (Min/Fixed): 0.8V
Maximum Output Voltage: 30.6V
Minimum Input Voltage: 4.5V
Alternative Parts (Cross-Reference): A4490EES-T; A4490SESTR-T;
Introduction Date: March 21, 2008
Estimated EOL Date: 2023
Is this a common-used part?: Yes
Popularity: High
Fake Threat In the Open Market: 31 pct.
Supply and Demand Status: Balance

Supplier's Site Datasheet
Voltage Regulators - DC DC Switching Regulators - A4490EESTR-T - Quarktwin Technology Ltd.
Shenzhen, Guangdong, China
Voltage Regulators - DC DC Switching Regulators
A4490EESTR-T
Voltage Regulators - DC DC Switching Regulators A4490EESTR-T
Buck Switching Regulator IC Positive Adjustable 0.8V 3 Output 20-WFQFN Exposed Pad

Buck Switching Regulator IC Positive Adjustable 0.8V 3 Output 20-WFQFN Exposed Pad

Supplier's Site Datasheet
PMIC - Voltage Regulators - DC DC Switching Regulators - A4490EESTR-T - Lingto Electronic Limited
Shenzhen, China
PMIC - Voltage Regulators - DC DC Switching Regulators
A4490EESTR-T
PMIC - Voltage Regulators - DC DC Switching Regulators A4490EESTR-T
IC REG BUCK ADJ TRPL 20QFN

IC REG BUCK ADJ TRPL 20QFN

Supplier's Site Datasheet
Voltage Regulators - DC DC Switching Regulators - 620-1245-2-ND - DigiKey
Thief River Falls, MN, United States
Voltage Regulators - DC DC Switching Regulators
620-1245-2-ND
Voltage Regulators - DC DC Switching Regulators 620-1245-2-ND
Buck Switching Regulator IC Positive Adjustable 0.8V 3 Output 20-WFQFN Exposed Pad

Buck Switching Regulator IC Positive Adjustable 0.8V 3 Output 20-WFQFN Exposed Pad

Supplier's Site Datasheet
Voltage Regulators - DC DC Switching Regulators - 620-1245-1-ND - DigiKey
Thief River Falls, MN, United States
Voltage Regulators - DC DC Switching Regulators
620-1245-1-ND
Voltage Regulators - DC DC Switching Regulators 620-1245-1-ND
Buck Switching Regulator IC Positive Adjustable 0.8V 3 Output 20-WFQFN Exposed Pad

Buck Switching Regulator IC Positive Adjustable 0.8V 3 Output 20-WFQFN Exposed Pad

Supplier's Site Datasheet
Voltage Regulators - DC DC Switching Regulators - 620-1245-6-ND - DigiKey
Thief River Falls, MN, United States
Voltage Regulators - DC DC Switching Regulators
620-1245-6-ND
Voltage Regulators - DC DC Switching Regulators 620-1245-6-ND
Buck Switching Regulator IC Positive Adjustable 0.8V 3 Output 20-WFQFN Exposed Pad

Buck Switching Regulator IC Positive Adjustable 0.8V 3 Output 20-WFQFN Exposed Pad

Supplier's Site Datasheet

Technical Specifications

  Allegro MicroSystems Inc. Shenzhen Shengyu Electronics Technology Limited LIXINC Electronics Co., Limited Win Source Electronics Quarktwin Technology Ltd. Lingto Electronic Limited DigiKey
Product Category IC Switching Voltage Regulators IC Switching Voltage Regulators IC Switching Voltage Regulators IC Switching Voltage Regulators IC Switching Voltage Regulators IC Switching Voltage Regulators IC Switching Voltage Regulators
Product Number A4490EESTR-T A4490EESTR-T A4490EESTR-T 007709-A4490EESTR-T A4490EESTR-T A4490EESTR-T 620-1245-2-ND
Product Name Triple Output Step Down Switching Regulator Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators Integrated Circuits PMIC - PMIC - Voltage Regulators - DCDC Switching Regulators - A4490EESTR-T Voltage Regulators - DC DC Switching Regulators PMIC - Voltage Regulators - DC DC Switching Regulators Voltage Regulators - DC DC Switching Regulators
Package Type Other; 20-Pin QFN Other; Tape & Reel (TR)Cut Tape (CT)Digi-Reel庐 Other; 20-QFN (4x4) Other; 20-WFQFN Exposed Pad Other; 20-WFQFN Exposed Pad
Life Cycle Stage Active Active Maturity; Active Active
Output Voltage 0.8000 volts 0.8000 volts 0.8000 volts 0.8000 to 30.6 volts 0.8000 to 30.6 volts
fsw 550 kHz 550 kHz 550 kHz 550 kHz 550 kHz 550 kHz
Operating Temperature -40 to 85 C (-40 to 185 F) -40 to 85 C (-40 to 185 F) -40 to 85 C (-40 to 185 F) -40 to 85 C (-40 to 185 F) -40 to 85 C (-40 to 185 F)
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