Texas Instruments TPS386596L33DGKR

The TPS386596L33DGKR from Texas Instruments is a quad reset supervisor integrated circuit designed to monitor four power rails and assert a reset signal if any of the monitored voltages drop below their respective thresholds. This device is part of the TPS386000 quad supervisor device series and is particularly useful in systems requiring multiple voltage monitoring and reset functions.

The TPS386596 features a fixed threshold for monitoring a 3.3-V nominal power supply and adjustable thresholds for the other three power supplies, which can be set using external resistor dividers. It also includes an active-low manual reset input, allowing for external control of the reset signal. The device operates with a very low quiescent current of 7 µA (typical) and is available in a space-saving 8-pin VSSOP package.

• Four Channel Voltage Detector: Monitors four power rails and asserts the RESET signal when any of the SENSE inputs drop below their respective thresholds.
• Fixed and Adjustable Thresholds: SENSE1 has a fixed threshold for monitoring a 3.3-V nominal power supply, while SENSE2, SENSE3, and SENSE4 are adjustable using external resistor dividers.
• Active-Low Manual Reset Input: Allows external logic signals to initiate a reset.
• Open-Drain RESET Output: Requires a pullup resistor to hold the line high when RESET is not asserted.
• Low Quiescent Current: Typical quiescent current of 7 µA.
• Space-Saving Package: Available in an 8-pin VSSOP package.
• Fixed 50-ms RESET Delay Time: Ensures proper reset timing.

• Notebook/Desktop Computers: For power supply monitoring and reset functions.
• Industrial Equipment: Suitable for various industrial applications requiring multiple voltage monitoring.
• Telecom, Networking Infrastructure: Used in telecommunications and networking equipment for reliable power monitoring.
• Server, Storage Equipment: Essential for ensuring the integrity of power supplies in server and storage systems.
• DSP and Microcontroller Applications: Ideal for use with digital signal processors, microcontrollers, and other logic circuits.
• FPGA/ASIC Applications: Used in field-programmable gate arrays and application-specific integrated circuits for power monitoring.

1. What is the primary function of the TPS386596L33DGKR?

   The primary function is to monitor four power rails and assert a reset signal if any of the monitored voltages drop below their respective thresholds.

2. What are the threshold voltages for the SENSE inputs?

   SENSE1 has a fixed threshold of 2.9 V, while SENSE2, SENSE3, and SENSE4 are adjustable down to 0.4 V using external resistor dividers.

3. How does the manual reset input work?

   The active-low manual reset input allows external logic signals to initiate a reset by pulling the MR pin low.

4. What is the quiescent current of the TPS386596L33DGKR?

   The typical quiescent current is 7 µA.

5. What is the package type and size of the TPS386596L33DGKR?

   It is available in an 8-pin VSSOP package with dimensions of 5.00 mm × 3.00 mm.

6. What is the RESET delay time?

   The RESET delay time is fixed at 50 ms.

7. How does the RESET output work?

   The RESET output is an open-drain output that requires a pullup resistor to hold the line high when not asserted.

8. What are the operating temperature ranges for the TPS386596L33DGKR?

   The operating junction temperature range is -40°C to 125°C, and the operating ambient temperature range is -40°C to 125°C.

9. What are some common applications of the TPS386596L33DGKR?

   Common applications include notebook/desktop computers, industrial equipment, telecom and networking infrastructure, servers, storage equipment, DSP and microcontroller applications, and FPGA/ASIC applications.

10. How does the device handle short negative transients on the SENSE pins?

    The device is relatively immune to short negative transients on the SENSE pins, with sensitivity depending on the threshold overdrive.