Overview
The L4993D, produced by STMicroelectronics, is a monolithic integrated 5 V voltage regulator designed for automotive applications. It features a low drop voltage at currents up to 150 mA, making it suitable for systems requiring stable and efficient voltage regulation. The device includes a p-channel MOS output voltage regulating element, which ensures high precision of the output voltage regardless of input voltage transients up to 40 V. The L4993D is AEC-Q100 qualified, indicating its compliance with automotive industry standards for reliability and performance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating DC Supply Voltage Range | 5.6 V to 31 V | V |
| Output Voltage | 5 V | V |
| Output Current | 150 mA | mA |
| Dropout Voltage (Max) | 0.4 V @ 150 mA | V |
| Quiescent Current (Typical) | 79 μA (watchdog disabled) | μA |
| Operating Temperature Range | -40°C to 150°C | °C |
| Package Type | SO-8, SO-20 | - |
| Protection Features | Thermal shutdown, Short circuit protection | - |
| PSRR | 55 dB (100 Hz) | dB |
Key Features
- AEC-Q100 qualified for automotive applications
- Low drop voltage regulator with high precision output voltage
- Programmable reset pulse delay with external capacitor
- Watchdog functionality with programmable timer and enable input
- Thermal shutdown and short circuit protection
- Wide temperature range: -40°C to 150°C
- Reset circuit sensing the output voltage down to 1 V
Applications
The L4993D is particularly suited for supplying microprocessor systems in automotive applications. Its robust features, such as watchdog and reset functions, make it ideal for use in vehicle control units, infotainment systems, and other automotive electronics that require reliable and stable voltage regulation.
Q & A
- What is the operating DC supply voltage range of the L4993D?
The operating DC supply voltage range of the L4993D is from 5.6 V to 31 V.
- What is the maximum output current of the L4993D?
The maximum output current of the L4993D is 150 mA.
- What is the dropout voltage of the L4993D at 150 mA?
The dropout voltage of the L4993D at 150 mA is 0.4 V.
- Does the L4993D have thermal protection?
Yes, the L4993D has thermal shutdown and short circuit protection features.
- What is the operating temperature range of the L4993D?
The operating temperature range of the L4993D is from -40°C to 150°C.
- Is the L4993D AEC-Q100 qualified?
Yes, the L4993D is AEC-Q100 qualified, making it suitable for automotive applications.
- What are the package options for the L4993D?
The L4993D is available in SO-8 and SO-20 packages.
- Does the L4993D have a watchdog function?
Yes, the L4993D includes a watchdog function with a programmable timer and enable input.
- How does the reset circuit work in the L4993D?
The reset circuit in the L4993D senses the output voltage down to 1 V and can be programmed with an external capacitor for the reset pulse delay.
- Is the L4993D RoHS compliant?
Yes, the L4993D is RoHS compliant and lead-free.
