Overview
The TPS3836E18DBVR is a nano power voltage supervisor from Texas Instruments, designed to provide circuit initialization and timing supervision for digital signal processors (DSPs) and processor-based systems. This device is part of the TPS3836 family, which includes variants with different reset output configurations and threshold voltages. The TPS3836E18DBVR specifically monitors a supply voltage of 1.8 V and is characterized by its low power consumption and selectable reset delay times.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage Range | 1.6 | - | 6 | V |
| Reset Threshold Voltage (VIT) | 1.66 | 1.71 | 1.74 | V |
| Supply Current | - | 220 nA | - | A |
| Reset Delay Time | 10 ms | - | 200 ms | - |
| Operating Temperature Range | -40 | - | 85 | °C |
| Package Type | - | 5-pin SOT23 | - | - |
Key Features
- Precision supply voltage supervision with a threshold voltage of 1.71 V for the TPS3836E18 variant.
- Power-on reset generator with selectable delay times of 10 ms or 200 ms, configurable via the CT pin.
- Active-low, push-pull RESET output (for TPS3836), active-high, push-pull RESET output (for TPS3837), or active-low, open-drain RESET output (for TPS3838).
- Manual reset input (MR) for external reset control.
- Low power consumption, typically 220 nA.
- Operating temperature range from -40°C to 85°C.
Applications
- Low-power DSPs, microcontrollers, or microprocessors.
- Portable and battery-powered equipment.
- Intelligent instruments.
- Wireless communication systems.
- Notebook computers and other mobile devices.
- Automotive systems (see TPS383x-Q1 for automotive-specific variants).
Q & A
- What is the primary function of the TPS3836E18DBVR?
The primary function is to provide circuit initialization and timing supervision by monitoring the supply voltage and generating a reset signal when the voltage falls below a specified threshold.
- What are the available reset delay times for the TPS3836E18DBVR?
The reset delay times can be set to either 10 ms or 200 ms, depending on the connection of the CT pin to GND or VDD, respectively.
- What is the typical supply current of the TPS3836E18DBVR?
The typical supply current is 220 nA.
- What is the operating temperature range of the TPS3836E18DBVR?
The operating temperature range is from -40°C to 85°C.
- What types of packages are available for the TPS3836E18DBVR?
The device is available in a 5-pin SOT23 package and a 2-mm × 2-mm SON-6 package.
- How does the manual reset (MR) pin function?
The manual reset pin is an active-low logic input that asserts the reset output to the active state when it is driven low. When the MR pin is high and the supply voltage is above the threshold voltage, the reset output deasserts after the reset delay time.
- What is the significance of the VIT (threshold voltage) in the TPS3836E18DBVR?
The VIT is the voltage below which the reset output is asserted. For the TPS3836E18 variant, this voltage is typically 1.71 V.
- Is a pull-up resistor required for the RESET output of the TPS3836E18DBVR?
No, a pull-up resistor is not required for the TPS3836E18DBVR since it has a push-pull RESET output. However, it is required for the open-drain variant (TPS3838).
- What precautions should be taken regarding the input supply voltage?
The input supply voltage should be within the range of 1.6 V to 6 V, and an input supply capacitor should be placed near the VDD pin to ensure stability. Additionally, precautions should be taken to avoid voltage transients exceeding 7 V.
- Can the TPS3836E18DBVR be used in automotive applications?
For automotive applications, the TPS383x-Q1 variant should be used instead.
