Overview
The L4972AD013TR is a step-down monolithic power switching regulator produced by STMicroelectronics. This device is part of the L4972 series and is packaged in a 20-pin SOIC (Small Outline Integrated Circuit) package. It is designed to deliver up to 2A of output current with an adjustable output voltage ranging from 5.1V to 40V. The L4972AD013TR is realized using BCD (Bipolar-CMOS-DMOS) mixed technology, which integrates isolated vertical DMOS power transistors and mixed CMOS/Bipolar transistors, ensuring high efficiency and fast switching times.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Input Voltage Range | 15 | - | 50 | V |
| Output Voltage Range | 5.1 | - | 40 | V |
| Output Current | - | - | 2 | A |
| Switching Frequency | - | 100 | 200 | KHz |
| Line Regulation | 12 | - | 30 | mV |
| Load Regulation | 7 | - | 20 | mV |
| Reference Voltage | 5 | 5.1 | 5.2 | V |
| Turn-on Threshold | - | 11 | - | V |
| Thermal Shutdown | - | - | - | - |
| Package Type | - | - | - | SOIC-20 |
Key Features
- 2A output current capability
- Adjustable output voltage from 5.1V to 40V
- Internal feed-forward line regulation and voltage feedforward control for superior line regulation
- Internal current limiting and thermal shutdown for protection
- Precise 5.1V ± 2% on-chip reference voltage
- Reset and power fail functions for microprocessor systems
- Soft start function to prevent output overcurrents at turn-on
- Under voltage lockout with hysteresis turn-on
- PWM latch to eliminate multiple pulsing within a period
- High efficiency and fast switching times due to BCD mixed technology
- Synchronization capability for multiple L4972A devices
Applications
- Microprocessor-based systems requiring reliable power supply with diagnostic and control functions
- Multiple supply configurations where synchronization between regulators is necessary
- Low-cost and high-efficiency power supply solutions in various electronic devices
- Systems requiring adjustable output voltages and high current handling
Q & A
- What is the output current capability of the L4972AD013TR?
The L4972AD013TR can deliver up to 2A of output current.
- What is the adjustable output voltage range of the L4972AD013TR?
The output voltage can be adjusted from 5.1V to 40V.
- What is the input voltage range for the L4972AD013TR?
The input voltage range is from 15V to 50V.
- What is the switching frequency range of the L4972AD013TR?
The switching frequency can be up to 200KHz.
- Does the L4972AD013TR have built-in protection features?
Yes, it includes internal current limiting, thermal shutdown, and under voltage lockout with hysteresis turn-on.
- What is the purpose of the soft start function in the L4972AD013TR?
The soft start function prevents output overcurrents at turn-on.
- Can multiple L4972AD013TR devices be synchronized?
Yes, multiple devices can be synchronized by connecting their sync inputs together or via an external sync pulse.
- What is the package type of the L4972AD013TR?
The device is packaged in a 20-pin SOIC (Small Outline Integrated Circuit) package.
- What are the key diagnostic and control functions of the L4972AD013TR?
The device includes reset and power fail functions for microprocessor systems.
- How does the L4972AD013TR maintain superior line regulation?
It uses internal feed-forward line regulation and voltage feedforward control.
