Overview
The ST890DTR, produced by STMicroelectronics, is a low-voltage, P-channel MOSFET power switch designed for high-side load switching applications. It operates with input voltages ranging from 2.7 V to 5.5 V, making it suitable for both 3 V and 5 V systems. This device is particularly useful in scenarios where current limiting and thermal protection are crucial.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.7 to 5.5 | V |
| Programmable Current Limit | Up to 1.2 A | A |
| Quiescent Current (ON) | 13 to 25 | µA |
| Quiescent Current (OFF) | 1 to 5 | µA |
| ON Resistance (VI = 4.5 V) | 75 to 120 | mΩ |
| ON Resistance (VI = 3 V) | 90 to 130 | mΩ |
| Thermal Shutdown Temperature | 130 °C | °C |
| Package Types | SO8, DFN8L 3x3 | |
| Operating Temperature Range | -40 to 85 °C (ST890DTR) | °C |
Key Features
- Programmable current limit up to 1.2 A
- Low quiescent current
- Thermal shutdown protection
- Active-low FAULT indicator output
- Short-circuit protection
- Available in SO8 and DFN8L 3x3 packages
- Undervoltage lockout with hysteresis
Applications
- PCMCIA slots
- Access bus slots
- Portable equipment
Q & A
- What is the input voltage range of the ST890DTR?
The input voltage range is from 2.7 V to 5.5 V. - How is the current limit programmed in the ST890DTR?
The current limit is programmed using an external resistor connected to the SET pin. - What is the maximum programmable output current limit of the ST890DTR?
The maximum programmable output current limit is up to 1.2 A. - What type of protection does the ST890DTR offer against thermal overload?
The ST890DTR offers thermal shutdown protection, turning off the switch when the junction temperature exceeds 130 °C. - What is the purpose of the FAULT pin in the ST890DTR?
The FAULT pin is an open-drain active-low output that indicates fault conditions such as current limit, short-circuit, or thermal protection. - In what packages is the ST890DTR available?
The ST890DTR is available in SO8 and DFN8L 3x3 packages. - What is the operating temperature range for the ST890DTR?
The operating temperature range for the ST890DTR is -40 to 85 °C. - How does the ST890DTR protect against short-circuit events?
The ST890DTR provides short-circuit protection by limiting the output current during a short-circuit event. - What is the typical ON resistance of the ST890DTR at 4.5 V input voltage?
The typical ON resistance at 4.5 V input voltage is 75 to 120 mΩ. - Is the ST890DTR suitable for both 3 V and 5 V systems?
Yes, the ST890DTR is suitable for both 3 V and 5 V systems due to its input voltage range.
