Overview
The ST890CDR is a low voltage, P-channel MOSFET power switch designed by STMicroelectronics for high-side load switching applications. This device operates within an input voltage range of 2.7 V to 5.5 V, making it suitable for both 3 V and 5 V systems. It features internal current limiting circuitry and thermal overload protection to safeguard the input supply and limit power dissipation and junction temperatures. The ST890CDR is available in SO-8 and DFN8L (3 x 3 mm) packages, ensuring versatility in various design requirements.
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 | Low | - |
| ON Resistance (Typ.) | 90 mΩ | mΩ |
| Operating Temperature Range | -40 to 85 | °C |
| Package Style | SO-8, DFN8L (3 x 3 mm) | - |
| Mounting Method | Surface Mount | - |
| Thermal Shutdown Temperature | 130 °C (Typ.) | °C |
Key Features
- 2.7 V to 5.5 V input range
- Programmable current limit up to 1.2 A
- Low quiescent current
- Thermal shutdown
- Active-low FAULT indicator output
- 90 mΩ (typ.) ON resistance
- Available in SO-8 and DFN8L (3 x 3 mm) packages
Applications
- PCMCIA slots
- Access bus slots
- Portable equipment
Q & A
- What is the input voltage range of the ST890CDR?
The input voltage range of the ST890CDR is 2.7 V to 5.5 V. - What is the maximum programmable current limit of the ST890CDR?
The maximum programmable current limit of the ST890CDR is up to 1.2 A. - What type of protection does the ST890CDR offer against thermal overload?
The ST890CDR offers thermal shutdown protection, which limits power dissipation and junction temperatures. It shuts down at a junction temperature of 130 °C (typ.). - What is the typical ON resistance of the ST890CDR?
The typical ON resistance of the ST890CDR is 90 mΩ. - In what packages is the ST890CDR available?
The ST890CDR is available in SO-8 and DFN8L (3 x 3 mm) packages. - What is the operating temperature range of the ST890CDR?
The operating temperature range of the ST890CDR is -40 °C to 85 °C. - What type of mounting method does the ST890CDR use?
The ST890CDR uses surface mount technology. - What is the purpose of the FAULT pin on the ST890CDR?
The FAULT pin is an active-low output that indicates when the device reaches the programmed current limit, experiences a short-circuit event, or goes into thermal protection. - How is the current limit programmed on the ST890CDR?
The current limit on the ST890CDR is programmed using an external resistor connected to the SET pin. - What are some common applications of the ST890CDR?
The ST890CDR is commonly used in PCMCIA slots, access bus slots, and portable equipment.
