Overview
The TPS3839G33DBZR is a voltage supervisory circuit produced by Texas Instruments. It is part of the TPS383x family, which includes ultralow current, voltage monitoring devices. This specific model is designed to monitor a single voltage and initiate an active-low reset signal when the supply voltage drops below the factory-trimmed reset threshold voltage. The device is particularly suited for low-power and portable applications due to its ultralow current consumption of 150 nA (typical).
Key Specifications
| Parameter | Min | Typical | Max | Unit |
|---|---|---|---|---|
| Input Supply Voltage (VDD) | 0.9 | - | 6.5 | V |
| Minimum VDD for Valid Output (V(POR)) | 0.6 | - | - | V |
| Supply Current (IDD) | - | 150 | 500 | nA |
| Low-Level Output Voltage (VOL) at IOL = 1 µA | 0.4 | - | - | V |
| Operating Temperature Range | -40 | - | 85 | °C |
| Reset Delay Time | - | 200 | - | ms |
| Package Type | - | SOT23-3 (DBZ) | - | - |
Key Features
- Ultralow Supply Current: 150 nA (typical), making it ideal for low-power applications.
- Operating Supply Voltage: 0.9 V to 6.5 V.
- Valid Reset for VDD > 0.6 V: Ensures correct output logic state even at low supply voltages.
- Push-Pull RESET Output: Capable of directly driving input pins.
- Factory-Trimmed Reset Threshold Voltages: Precise voltage monitoring.
- Temperature Range: –40°C to 85°C.
- Package Options: Available in 3-pin SOT23 (DBZ) and 4-pin, 1-mm × 1-mm (DQN) X2SON packages.
Applications
The TPS3839G33DBZR is designed for use in various low-power and portable applications, including but not limited to:
- Portable electronics such as smartphones, tablets, and wearable devices.
- Battery-powered devices where power efficiency is crucial.
- Industrial control systems requiring precise voltage monitoring.
- Automotive systems where reliability and low power consumption are essential.
Q & A
- What is the typical supply current of the TPS3839G33DBZR?
The typical supply current is 150 nA. - What is the operating supply voltage range of the TPS3839G33DBZR?
The operating supply voltage range is from 0.9 V to 6.5 V. - What is the minimum VDD voltage for a valid output?
The minimum VDD voltage for a valid output is 0.6 V. - What type of output does the RESET pin have?
The RESET pin has a push-pull output drive. - What is the reset delay time after VDD rises above the threshold voltage?
The reset delay time is typically 200 ms. - In what temperature range can the TPS3839G33DBZR operate?
The device can operate in the temperature range of –40°C to 85°C. - What are the available package options for the TPS3839G33DBZR?
The device is available in 3-pin SOT23 (DBZ) and 4-pin, 1-mm × 1-mm (DQN) X2SON packages. - Why is the TPS3839G33DBZR suitable for low-power applications?
It is suitable due to its ultralow current consumption of 150 nA (typical). - What should be done to ensure stable operation in high-impedance input supplies?
A small 0.1-µF bypass capacitor should be added near the VDD pin. - Does the TPS3839G33DBZR ignore fast transients on the VDD pin?
Yes, it is designed to ignore fast transients on the VDD pin.
