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Datasheets:
A4402: Constant On-Time Buck Converter with Integrated Linear Regulator (PDF)
Selection Guides:
Power Management ICs,
Power Management ICs: Linear Regulators,
Power Management ICs: Switching Regulators
Press Releases:
A4402: Allegro MicroSystems, Inc. Announces New Dual Output Regulator,
A4402: Regler-IC mit zwei einstellbaren Ausgangsspannungen kombiniert Schalt- und Linearregler,
A4402: Régulateur double sortie combinant des régulations à découpage et linéaire
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A4402
Constant On-Time Buck Converter with Integrated Linear Regulator
Features
- 2 MHz switching frequency
- Adjustable soft start timer
- Watchdog input
- Power-on reset output
- Adjustable 2% buck regulator
- Adjustable 2% linear regulator
- Enable input
- 6 to 50 V supply voltage range
- Overcurrent protection
- Undervoltage lockout (UVLO)
- Thermal shutdown protection
Applications
- Photo and inkjet printers
- Industrial controls
- Distributed power systems
- Network applications
Description
The A4402 is a power management IC that combines a 2% constant on-time buck regulator and a 2% linear regulator. Ideal for applications that require two regulated voltages. The buck regulator output supplies the adjustable linear regulator to reduce power dissipation and increase overall efficiency.
The switching regulator is capable of operating above 2 MHz. A greater than 2 MHz switching frequency enables the customer to select low value inductors and capacitors while avoiding EMI.
Protection features include undervoltage lockout and thermal shutdown. In case of a shorted load, each regulator features overcurrent protection. The A4402 also features a power-on reset with adjustable delay for the microprocessor output.
The A4402 is provided in a 16-pin, ≤1.20 mm nominal overall height TSSOP, with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe plating.
Functional Block Diagram
| Part Number | Package Type | RoHS Compliant |
Part Composition/ RoHS Data |
Temperature | Comments | Samples | Distributor Stock |
|---|---|---|---|---|---|---|---|
| A4402ELPTR-T | 16-lead TSSOP | Yes | view data | -40 °C to 85 °C | new |
Contact Local Sales Representative or check distributor stock |
Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.