Texas Instruments TPS386596L33DGKT

The TPS386596L33DGKT from Texas Instruments is a quad reset supervisor integrated circuit designed to monitor four power rails and assert a reset signal when 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 robust power supply monitoring.

The TPS386596L33DGKT features a fixed 3.3-V threshold for one of its channels and adjustable thresholds for the other three channels, which can be set using external resistor dividers. It also includes an active-low manual reset input, allowing for external control over the reset signal. The device operates with a very low quiescent current of 7 µA (typical) and is packaged in a space-saving 8-pin VSSOP (DGK) package.

• Four Channel Voltage Detector: Monitors four power rails with high threshold accuracy of 0.25% (typical).
• Fixed and Adjustable Thresholds: SENSE1 has a fixed 3.3-V threshold, while SENSE2, SENSE3, and SENSE4 are adjustable using external resistors.
• Active-Low Manual Reset Input: Allows external control over the reset signal.
• Open-Drain RESET Output: Requires a pullup resistor to hold the line high when not asserted.
• Low Quiescent Current: 7 µA (typical), making it energy-efficient.
• Space-Saving Package: 8-pin VSSOP (DGK) package.
• Fixed 50-ms RESET Delay Time: Ensures consistent reset timing.

• Notebook/Desktop Computers: Ensures reliable power supply monitoring.
• Industrial Equipment: Suitable for robust industrial applications.
• Telecom, Networking Infrastructure: Monitors power supplies in communication systems.
• Server, Storage Equipment: Critical for maintaining system integrity in data centers.
• DSP and Microcontroller Applications: Supports a variety of digital signal processing and microcontroller systems.
• FPGA/ASIC Applications: Used in field-programmable gate arrays and application-specific integrated circuits.

1. What is the primary function of the TPS386596L33DGKT?

   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 3.3-V threshold, while SENSE2, SENSE3, and SENSE4 are adjustable down to 0.4 V using external resistors.

3. How does the manual reset input work?

   The manual reset (MR) input allows an external logic signal to assert the RESET signal. A logic low at MR causes RESET to assert, and it deasserts after a fixed 50-ms delay when MR returns high and all SENSE inputs are above their thresholds.

4. What is the quiescent current of the TPS386596L33DGKT?

   The quiescent current is 7 µA (typical).

5. What is the package type and pin count of the TPS386596L33DGKT?

   The device is packaged in an 8-pin VSSOP (DGK) package.

6. What is the operating temperature range of the TPS386596L33DGKT?

   The operating temperature range is from -40°C to 125°C.

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 is the reset delay time of the TPS386596L33DGKT?

   The reset delay time is fixed at 50 ms.

9. In what types of applications is the TPS386596L33DGKT commonly used?

   It is commonly used in notebook/desktop computers, industrial equipment, telecom and networking infrastructure, servers, storage equipment, DSP and microcontroller applications, and FPGA/ASIC applications.

10. What is the recommended pullup resistor value for the RESET output?

    The pullup resistor should be no smaller than 10 kΩ.