Overview
The TPS3838K33DBVRG4 is a nano power voltage supervisor from Texas Instruments, designed to provide circuit initialization and timing supervision for digital signal processors (DSP) and processor-based systems. This device is part of the TPS383x family, which includes the TPS3836, TPS3837, and TPS3838. The TPS3838K33DBVRG4 specifically features an active-low, open-drain RESET output and is optimized for low-power applications.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage Range | 1.6 V to 6 V |
| Supply Current | 220 nA (typical) |
| Precision Supply Voltage Supervision Range | 1.8 V, 2.5 V, 3.0 V, 3.3 V |
| Reset Delay Time | 10 ms or 200 ms (selectable) |
| RESET Output Type | Active-low, open-drain |
| Package Options | 5-pin SOT23, 2-mm × 2-mm SON-6 |
| Temperature Range | –40°C to 85°C |
| Threshold Voltage (VIT) for TPS3838K33 | 2.93 V (typical) |
Key Features
- Precision supply voltage supervision with fixed-sense threshold voltage (VIT)
- Power-on reset generator with selectable delay time (10 ms or 200 ms)
- Manual reset capability
- Low power consumption: 220 nA (typical) supply current
- Active-low, open-drain RESET output (requires a pullup resistor)
- Available in 5-pin SOT23 and 2-mm × 2-mm SON-6 packages
- Operates over a temperature range of –40°C to 85°C
Applications
- Low-power DSPs, microcontrollers, or microprocessors
- Portable and battery-powered equipment
- Intelligent instruments
- Wireless communication systems
- Notebook computers
- Medical-specific insulation monitors
- WiFi routers
- Power distribution systems in ICU
- Automotive systems (see TPS383x-Q1 for automotive-specific versions)
Q & A
- What is the typical supply current of the TPS3838K33DBVRG4?
The typical supply current is 220 nA. - What are the available reset delay times for the TPS3838K33DBVRG4?
The reset delay times are 10 ms or 200 ms, selectable by connecting the CT pin to GND or VDD. - What type of RESET output does the TPS3838K33DBVRG4 have?
The TPS3838K33DBVRG4 has an active-low, open-drain RESET output. - What is the threshold voltage (VIT) for the TPS3838K33DBVRG4?
The threshold voltage (VIT) for the TPS3838K33DBVRG4 is typically 2.93 V. - In what temperature range does the TPS3838K33DBVRG4 operate?
The device operates over a temperature range of –40°C to 85°C. - What are the package options for the TPS3838K33DBVRG4?
The device is available in 5-pin SOT23 and 2-mm × 2-mm SON-6 packages. - Does the TPS3838K33DBVRG4 require a pullup resistor for the RESET output?
Yes, the TPS3838K33DBVRG4 requires a pullup resistor for the open-drain RESET output. - What is the purpose of the manual reset (MR) pin?
The manual reset (MR) pin allows for manual assertion of the reset output by pulling it low. - How does the device handle power-on reset?
During power-on, the RESET output is asserted when the supply voltage VDD becomes higher than 1.1 V and remains active until VDD rises above the threshold voltage VIT plus the hysteresis voltage VHYS. - What are some typical applications of the TPS3838K33DBVRG4?
Typical applications include low-power DSPs, microcontrollers, portable and battery-powered equipment, intelligent instruments, and wireless communication systems.
