Overview
The A5975DTR is a step-down monolithic power switching regulator produced by STMicroelectronics. This device is capable of delivering up to 3 A DC current to the load, thanks to its minimum switch current limit of 3.75 A. The output voltage can be adjusted from 1.235 V to 35 V, making it versatile for various applications. The regulator features an internal P-channel DMOS transistor with a typical RDS(on) of 250 mΩ, which helps minimize the size of external components. It operates with an internally fixed switching frequency of 250 kHz and supports low dropout operation with 100% duty cycle. The device is particularly suited for automotive applications due to its ability to operate with an input voltage as low as 4 V, even in cold crank conditions.
Key Specifications
| Parameter | Value |
|---|---|
| Output Current | Up to 3 A DC |
| Input Voltage Range | 4 V to 36 V |
| Output Voltage Range | 1.235 V to 35 V |
| Switching Frequency | 250 kHz (internally fixed) |
| RDS(on) | Typical 250 mΩ |
| Package | HSOP8 with exposed frame |
| Thermal Resistance (RTHJ-A) | Approximately 40 °C/W |
| Operating Temperature Range | -40 °C to 150 °C |
| RoHS Compliance | Ecopack2 |
Key Features
- Qualified following the AEC-Q100 requirements
- 3 A DC output current
- Operating input voltage from 4 V to 36 V
- 3.3 V / (±2%) reference voltage
- Output voltage adjustable from 1.235 V to 35 V
- Low dropout operation: 100% duty cycle
- Internal current limiting and pulse-by-pulse current limit with internal frequency modulation
- Inhibit for zero current consumption
- Synchronization and protection against feedback disconnection
- Thermal shutdown
Applications
The A5975DTR is primarily designed for automotive applications, where it can operate effectively even in cold crank conditions due to its low minimum input voltage. It is also suitable for industrial applications requiring high reliability and performance.
Q & A
- What is the maximum output current of the A5975DTR?
The A5975DTR can deliver up to 3 A DC current to the load. - What is the input voltage range for the A5975DTR?
The input voltage range is from 4 V to 36 V. - What is the adjustable output voltage range of the A5975DTR?
The output voltage can be adjusted from 1.235 V to 35 V. - What is the switching frequency of the A5975DTR?
The switching frequency is internally fixed at 250 kHz. - Does the A5975DTR support low dropout operation?
Yes, it supports low dropout operation with 100% duty cycle. - What type of transistor is used in the A5975DTR?
The device uses an internal P-channel DMOS transistor. - Is the A5975DTR qualified for automotive applications?
Yes, it is qualified following the AEC-Q100 requirements. - What is the thermal resistance (RTHJ-A) of the A5975DTR?
The thermal resistance (RTHJ-A) is approximately 40 °C/W. - Does the A5975DTR have protection features?
Yes, it includes internal current limiting, pulse-by-pulse current limit with internal frequency modulation, and thermal shutdown. - What is the package type of the A5975DTR?
The package type is HSOP8 with an exposed frame.
