Overview
The TPS3839G18DBZR is an ultralow power, supply voltage supervisor produced by Texas Instruments. This device is part of the TPS383x series, which includes the TPS3831 and TPS3839. These voltage supervisory circuits are designed to monitor a single voltage supply and initiate an active-low reset signal whenever the VDD supply voltage drops below the factory-trimmed reset threshold voltage. The TPS3839G18DBZR is particularly suited for low-power and portable applications due to its extremely low current consumption of 150 nA (typical).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOT-23 (DBZ) | - |
| Pins | 3 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Current | 150 nA (Typical) | nA |
| Operating Supply Voltage | 0.9 V to 6.5 V | V |
| Minimum VDD for Valid Output | 0.6 V | V |
| Low-Level Output Voltage (RESET pin) | 0.4 V (VDD = 1.2 V to 2.8 V, IOL = 0.5 mA) | V |
| Reset Delay Time | 200 ms (Typical) | ms |
Key Features
- Ultralow Supply Current: 150 nA (Typical), making it ideal for low-power and portable applications.
- Operating Supply Voltage: 0.9 V to 6.5 V.
- Factory-Trimmed Reset Threshold Voltages: Ensures precise monitoring of the supply voltage.
- Push-Pull RESET Output: Capable of directly driving input pins.
- 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
- Glucose Monitors: Ideal for medical devices requiring precise voltage monitoring and low power consumption.
- Tablets and Wearables: Suitable for portable electronic devices that need reliable voltage supervision with minimal power draw.
- Low-Power Systems: Any system requiring ultralow power voltage monitoring, such as battery-powered devices and IoT applications).
Q & A
- What is the typical supply current of the TPS3839G18DBZR?
The typical supply current is 150 nA).
- What is the operating supply voltage range of the TPS3839G18DBZR?
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 is the reset delay time of the TPS3839G18DBZR?
The reset delay time is approximately 200 ms (typical)).
- In what packages is the TPS3839G18DBZR available?
The device is available in 3-pin SOT23 (DBZ) and 4-pin, 1-mm × 1-mm (DQN) X2SON packages).
- What is the temperature range of the TPS3839G18DBZR?
The temperature range is –40°C to 85°C).
- Does the TPS3839G18DBZR have a manual reset input?
No, the TPS3839 does not have a manual reset input; this feature is available in the TPS3831).
- How should the VDD pin be bypassed for stable operation?
A small 0.1-µF bypass capacitor should be added near the VDD pin for stable operation).
- What types of applications are the TPS3839G18DBZR suited for?
The device is suited for low-power and portable applications, such as glucose monitors, tablets, wearables, and other low-power systems).
- What is the low-level output voltage of the RESET pin?
The low-level output voltage of the RESET pin is 0.4 V (VDD = 1.2 V to 2.8 V, IOL = 0.5 mA)).
