Overview
The TPS3838K33DBVT 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, TPS3837, and TPS3838 family of supervisory circuits. It operates over a supply voltage range of 1.6 V to 6 V and is characterized by its ultra-low power consumption, making it suitable for battery-powered and low-power applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 1.6 V to 6 V | V |
| Supply Current (Typical) | 220 nA | nA |
| Threshold Voltage (VIT) | 2.93 V | V |
| Reset Delay Time | 10 ms or 200 ms | ms |
| RESET Output Type | Active-low, open-drain | |
| Package Types | 5-pin SOT23, 2-mm × 2-mm, 6-pin SON | |
| Temperature Range | –40°C to 85°C | °C |
Key Features
- Precision supply voltage supervision with thresholds at 1.8 V, 2.5 V, 3.0 V, and 3.3 V.
- Power-on reset generator with selectable delay time of 10 ms or 200 ms.
- Manual reset capability.
- Ultra-low power consumption of 220 nA (typical).
- Active-low, open-drain RESET output (for TPS3838).
- Available in 5-pin SOT23 and 2-mm × 2-mm, 6-pin SON packages.
Applications
- Applications using low-power DSPs, microcontrollers, or microprocessors.
- Portable and battery-powered equipment.
- Intelligent instruments.
- Wireless communication systems.
- Notebook computers.
- Automotive systems (see TPS383x-Q1 for automotive-specific versions).
Q & A
- What is the typical supply current of the TPS3838K33DBVT?
The typical supply current is 220 nA.
- What are the available threshold voltages for the TPS383x family?
The available threshold voltages are 1.8 V, 2.5 V, 3.0 V, and 3.3 V.
- How can the reset delay time be adjusted?
The reset delay time can be adjusted by connecting the CT pin to either GND for a 10 ms delay or VDD for a 200 ms delay.
- What type of RESET output does the TPS3838K33DBVT have?
The TPS3838K33DBVT has an active-low, open-drain RESET output.
- What are the package options for the TPS3838K33DBVT?
The device is available in 5-pin SOT23 and 2-mm × 2-mm, 6-pin SON packages.
- What is the operating temperature range of the TPS3838K33DBVT?
The operating temperature range is –40°C to 85°C.
- Does the TPS3838K33DBVT require a pullup resistor for the RESET output?
- What is the purpose of the manual reset (MR) pin?
The manual reset 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 for the TPS3838K33DBVT?
Typical applications include portable and battery-powered equipment, intelligent instruments, wireless communication systems, and notebook computers.
