Allegro MicroSystems Inc. Valley Current Mode Control Buck Converter A4403GEUTR-T

Description
The A4403 is a buck converter that uses valley current-mode control. This control scheme allows very short switch on-times to be achieved, making it ideal for applications that require high switching frequencies combined with high input voltages and low output voltages. Low cost is accomplished through high switching frequencies of up to 2MHz, allowing smaller and lower value inductors and capacitors. In addition, minimal external components are required through high levels of integration. Optimal drive circuits are utilized to minimize switching losses. The switching frequency is maintained constant, as the on-time is modulated by the input voltage. This feed-forward control ensures excellent line correction. The on-time is set by an external resistor pulled-up to the input supply. When power is initially applied and the device is enabled, a user-configurable soft-start function occurs to minimize inrush current and to prevent output overshoot. Internal housekeeping and bootstrap supplies are provided which only require the addition of one small ceramic capacitor. A top-off charge pump is also provide to ensure correct operation at light loads. Internal diagnostics provide comprehensive protection against overcurrents, input undervoltages, and overtemperatures. The device package is a 16-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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Company
Product
Description
Supplier Links
Valley Current Mode Control Buck Converter - A4403GEUTR-T - Allegro MicroSystems Inc.
Manchester, NH, United States
Valley Current Mode Control Buck Converter
A4403GEUTR-T
Valley Current Mode Control Buck Converter A4403GEUTR-T
The A4403 is a buck converter that uses valley current-mode control. This control scheme allows very short switch on-times to be achieved, making it ideal for applications that require high switching frequencies combined with high input voltages and low output voltages. Low cost is accomplished through high switching frequencies of up to 2MHz, allowing smaller and lower value inductors and capacitors. In addition, minimal external components are required through high levels of integration. Optimal drive circuits are utilized to minimize switching losses. The switching frequency is maintained constant, as the on-time is modulated by the input voltage. This feed-forward control ensures excellent line correction. The on-time is set by an external resistor pulled-up to the input supply. When power is initially applied and the device is enabled, a user-configurable soft-start function occurs to minimize inrush current and to prevent output overshoot. Internal housekeeping and bootstrap supplies are provided which only require the addition of one small ceramic capacitor. A top-off charge pump is also provide to ensure correct operation at light loads. Internal diagnostics provide comprehensive protection against overcurrents, input undervoltages, and overtemperatures. The device package is a 16-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.

The A4403 is a buck converter that uses valley current-mode control. This control scheme allows very short switch on-times to be achieved, making it ideal for applications that require high switching frequencies combined with high input voltages and low output voltages.

Low cost is accomplished through high switching frequencies of up to 2MHz, allowing smaller and lower value inductors and capacitors. In addition, minimal external components are required through high levels of integration. Optimal drive circuits are utilized to minimize switching losses.

The switching frequency is maintained constant, as the on-time is modulated by the input voltage. This feed-forward control ensures excellent line correction. The on-time is set by an external resistor pulled-up to the input supply.

When power is initially applied and the device is enabled, a user-configurable soft-start function occurs to minimize inrush current and to prevent output overshoot. Internal housekeeping and bootstrap supplies are provided which only require the addition of one small ceramic capacitor. A top-off charge pump is also provide to ensure correct operation at light loads.

Internal diagnostics provide comprehensive protection against overcurrents, input undervoltages, and overtemperatures.

The device package is a 16-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 - A4403GEUTR-T - LIXINC Electronics Co., Limited
Hong Kong, China
Integrated Circuits
A4403GEUTR-T
Integrated Circuits A4403GEUTR-T
IC REG BUCK ADJUSTABLE 3A 16QFN

IC REG BUCK ADJUSTABLE 3A 16QFN

Supplier's Site Datasheet
 - 6807236P - RS Components, Ltd.
Corby, Northants, United Kingdom
A high-voltage buck converter with a competitive rate of efficiency. Able to handle a wide input operating voltage range, this step-down regulator is typically used in consumer equipment power supplies. Maximum Output Current = 3A Regulator Function = Buck Controller Minimum Input Voltage = 9 V Maximum Input Voltage = 46 V Mounting Type = Surface Mount Number of Outputs = 1 Pin Count = 16 Package Type = QFN Switching Regulator = Yes Width = 4mm Delivery on production packaging - Reel. This product is non-returnable.

A high-voltage buck converter with a competitive rate of efficiency. Able to handle a wide input operating voltage range, this step-down regulator is typically used in consumer equipment power supplies.
Maximum Output Current = 3A
Regulator Function = Buck Controller
Minimum Input Voltage = 9 V
Maximum Input Voltage = 46 V
Mounting Type = Surface Mount
Number of Outputs = 1
Pin Count = 16
Package Type = QFN
Switching Regulator = Yes
Width = 4mm
Delivery on production packaging - Reel. This product is non-returnable.

Supplier's Site
 - 6807236 - RS Components, Ltd.
Corby, Northants, United Kingdom
A high-voltage buck converter with a competitive rate of efficiency. Able to handle a wide input operating voltage range, this step-down regulator is typically used in consumer equipment power supplies. Maximum Output Current = 3A Regulator Function = Buck Controller Minimum Input Voltage = 9 V Maximum Input Voltage = 46 V Mounting Type = Surface Mount Number of Outputs = 1 Pin Count = 16 Package Type = QFN Switching Regulator = Yes Width = 4mm

A high-voltage buck converter with a competitive rate of efficiency. Able to handle a wide input operating voltage range, this step-down regulator is typically used in consumer equipment power supplies.
Maximum Output Current = 3A
Regulator Function = Buck Controller
Minimum Input Voltage = 9 V
Maximum Input Voltage = 46 V
Mounting Type = Surface Mount
Number of Outputs = 1
Pin Count = 16
Package Type = QFN
Switching Regulator = Yes
Width = 4mm

Supplier's Site
Voltage Regulators - DC DC Switching Regulators - 620-1273-1-ND - DigiKey
Thief River Falls, MN, United States
Voltage Regulators - DC DC Switching Regulators
620-1273-1-ND
Voltage Regulators - DC DC Switching Regulators 620-1273-1-ND
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 3A 16-WQFN Exposed Pad

Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 3A 16-WQFN Exposed Pad

Supplier's Site Datasheet
Voltage Regulators - DC DC Switching Regulators - 620-1273-6-ND - DigiKey
Thief River Falls, MN, United States
Voltage Regulators - DC DC Switching Regulators
620-1273-6-ND
Voltage Regulators - DC DC Switching Regulators 620-1273-6-ND
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 3A 16-WQFN Exposed Pad

Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 3A 16-WQFN Exposed Pad

Supplier's Site Datasheet
Voltage Regulators - DC DC Switching Regulators - 620-1273-2-ND - DigiKey
Thief River Falls, MN, United States
Voltage Regulators - DC DC Switching Regulators
620-1273-2-ND
Voltage Regulators - DC DC Switching Regulators 620-1273-2-ND
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 3A 16-WQFN Exposed Pad

Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 3A 16-WQFN Exposed Pad

Supplier's Site Datasheet
PMIC - PMIC - Voltage Regulators - DCDC Switching Regulators - A4403GEUTR-T - 1134689-A4403GEUTR-T - Win Source Electronics
Yishun, Singapore
PMIC - PMIC - Voltage Regulators - DCDC Switching Regulators - A4403GEUTR-T
1134689-A4403GEUTR-T
PMIC - PMIC - Voltage Regulators - DCDC Switching Regulators - A4403GEUTR-T 1134689-A4403GEUTR-T
Manufacturer: Allegro MicroSystems, LLC Win Source Part Number: 1134689-A4403GEUTR-T Packaging: Reel - TR Operating Temperature Range: -40°C ~ 105°C (TA) Package: 16-WQFN Exposed Pad Mounting: SMD Output Type: Adjustable Function: Step-Down Topology: Buck Frequency - Switching: 450kHz ~ 2MHz Number of Outputs: 1 Output Configuration: Positive Synchronous Rectifier: No Output Current: 3A Family Name: A4403 Output Voltage: 0.8V Categories: Integrated Circuits (ICs) Manufacturer Homepage: www.allegromicro.com Manufacturer Package: 16-QFN (4x4) Output Voltage MAX: 46V Input Voltage MIN: 9V Voltage Input MAX: 46V Alternative Parts (Cross-Reference): CS51413GMNR2; CS51414GMNR2G; CS51414EMNR2G; Introduction Date: November 05, 2008 Country of Origin: Thailand Estimated EOL Date: 2023 Halogen Free: Compliant Popularity: Medium Fake Threat In the Open Market: 51 pct. Supply and Demand Status: Limited

Manufacturer: Allegro MicroSystems, LLC
Win Source Part Number: 1134689-A4403GEUTR-T
Packaging: Reel - TR
Operating Temperature Range: -40°C ~ 105°C (TA)
Package: 16-WQFN Exposed Pad
Mounting: SMD
Output Type: Adjustable
Function: Step-Down
Topology: Buck
Frequency - Switching: 450kHz ~ 2MHz
Number of Outputs: 1
Output Configuration: Positive
Synchronous Rectifier: No
Output Current: 3A
Family Name: A4403
Output Voltage: 0.8V
Categories: Integrated Circuits (ICs)
Manufacturer Homepage: www.allegromicro.com
Manufacturer Package: 16-QFN (4x4)
Output Voltage MAX: 46V
Input Voltage MIN: 9V
Voltage Input MAX: 46V
Alternative Parts (Cross-Reference): CS51413GMNR2; CS51414GMNR2G; CS51414EMNR2G;
Introduction Date: November 05, 2008
Country of Origin: Thailand
Estimated EOL Date: 2023
Halogen Free: Compliant
Popularity: Medium
Fake Threat In the Open Market: 51 pct.
Supply and Demand Status: Limited

Supplier's Site Datasheet
PMIC - Voltage Regulators - DC DC Switching Regulators - A4403GEUTR-T - Lingto Electronic Limited
Shenzhen, China
PMIC - Voltage Regulators - DC DC Switching Regulators
A4403GEUTR-T
PMIC - Voltage Regulators - DC DC Switching Regulators A4403GEUTR-T
IC REG BUCK ADJUSTABLE 3A 16QFN

IC REG BUCK ADJUSTABLE 3A 16QFN

Supplier's Site Datasheet
Voltage Regulators - DC DC Switching Regulators - A4403GEUTR-T - Quarktwin Technology Ltd.
Shenzhen, Guangdong, China
Voltage Regulators - DC DC Switching Regulators
A4403GEUTR-T
Voltage Regulators - DC DC Switching Regulators A4403GEUTR-T
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 3A 16-WQFN Exposed Pad

Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 3A 16-WQFN Exposed Pad

Supplier's Site Datasheet
Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators - A4403GEUTR-T - Shenzhen Shengyu Electronics Technology Limited
Futian, China
Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators
A4403GEUTR-T
Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators A4403GEUTR-T
IC REG BUCK ADJ 3A 16QFN

IC REG BUCK ADJ 3A 16QFN

Supplier's Site

Technical Specifications

  Allegro MicroSystems Inc. LIXINC Electronics Co., Limited RS Components, Ltd. DigiKey Win Source Electronics Lingto Electronic Limited Quarktwin Technology Ltd. Shenzhen Shengyu Electronics Technology Limited
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 IC Switching Voltage Regulators
Product Number A4403GEUTR-T A4403GEUTR-T 6807236P 620-1273-1-ND 1134689-A4403GEUTR-T A4403GEUTR-T A4403GEUTR-T A4403GEUTR-T
Product Name Valley Current Mode Control Buck Converter Integrated Circuits Voltage Regulators - DC DC Switching Regulators PMIC - PMIC - Voltage Regulators - DCDC Switching Regulators - A4403GEUTR-T PMIC - Voltage Regulators - DC DC Switching Regulators Voltage Regulators - DC DC Switching Regulators Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators
Configuration / Function Buck Buck; Buck Buck; Boost Buck Buck
Package Type Other; 16-Pin QFN Other; Tape & Reel (TR)Cut Tape (CT)Digi-Reel庐 Other; QFN Other; 16-WQFN Exposed Pad Other; 16-WQFN Exposed Pad Other; 16-WQFN Exposed Pad
Output Voltage Type Adjustable / Variable; Adjustable Adjustable / Variable Adjustable / Variable; Adjustable Adjustable / Variable Adjustable / Variable; Adjustable
Life Cycle Stage Active Active Active
Output Voltage 0.8000 volts 0.8000 to 46 volts 0.8000 volts 0.8000 to 46 volts 0.8000 volts
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