Overview
The TPS3839G33DQNR is an ultralow power supply voltage monitor from Texas Instruments. This device is part of the TPS383x family, which includes the TPS3831 and TPS3839. It is designed to monitor the input supply voltage and assert an active-low reset signal when the voltage drops below a predefined threshold. The TPS3839G33DQNR is particularly suited for applications requiring low power consumption and precise voltage monitoring.
The device features a manual reset input and is available in a 4-pin, 1-mm × 1-mm (DQN) X2SON package, making it ideal for space-constrained designs. Its ultralow supply current of 150 nA (typical) and wide operating supply voltage range of 0.9 V to 6.5 V make it versatile for various applications.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Input Supply Voltage (VDD) | 0.9 | 6.5 | V | |
| Minimum VDD Voltage for Valid Output (V(POR)) | 0.6 | V | ||
| Supply Current (IDD) | 150 | 500 | nA | |
| Low-Level Output Voltage (VOL) at VDD = 1.2 V to 2.8 V, IOL = 0.5 mA | 0.4 | V | ||
| High-Level Output Voltage (VOH) at VDD = 1.2 V to 3.3 V, IOH = –0.5 mA | VDD – 0.4 | V | ||
| Low-Level Input Voltage (VIL) on MR Pin | 0.3VDD | V | ||
| High-Level Input Voltage (VIH) on MR Pin | 0.7VDD | V | ||
| MR Pin Pullup Resistance (RMR) | 10 | 30 | kΩ | |
| Negative-Going Input Threshold Accuracy at TA = 25°C | ±1% | |||
| Negative-Going Threshold Voltage (VIT–) for TPS3839G33 | 3.003 | 3.08 | 3.126 | V |
| Hysteresis Voltage (Vhys) | 31 | mV |
Key Features
- Ultralow Supply Current: Typical supply current of 150 nA, making it suitable for battery-powered devices and low-power applications.
- Precision Factory-Trimmed Threshold Voltages: Accurate monitoring of supply voltage with predefined threshold voltages.
- Wide Operating Supply Voltage Range: Operates from 0.9 V to 6.5 V, accommodating various power supply scenarios.
- Manual Reset Input: The TPS3839 includes a manual reset (MR) pin to force the RESET signal low, even if the supply voltage is above the threshold.
- Transient Rejection: Built-in rejection of fast transients on the VDD pin to ensure stable operation.
- Compact Packaging: Available in a 4-pin, 1-mm × 1-mm (DQN) X2SON package and a 3-pin SOT23 (DBZ) package.
Applications
The TPS3839G33DQNR is well-suited for a variety of applications that require precise voltage monitoring and low power consumption. Some key applications include:
- Single-Cell Alkaline Battery Applications: Ideal for monitoring the voltage of single-cell alkaline batteries, ensuring the system operates within safe voltage limits.
- Wearables and Portable Devices: Its low power consumption makes it a good fit for wearables, fitness trackers, and other portable electronic devices.
- Tablets and Mobile Devices: Can be used to monitor the battery voltage in tablets and mobile devices, ensuring reliable operation.
- Glucose Monitors and Medical Devices: Suitable for medical devices that require precise voltage monitoring and low power consumption.
Q & A
- What is the typical supply current of the TPS3839G33DQNR?
The typical supply current is 150 nA.
- What is the operating supply voltage range of the TPS3839G33DQNR?
The device operates from 0.9 V to 6.5 V.
- What is the purpose of the manual reset (MR) pin?
The MR pin can be used to force the RESET signal low, even if the supply voltage is above the threshold.
- How does the TPS3839G33DQNR handle voltage transients?
The device has built-in rejection of fast transients on the VDD pin to ensure stable operation.
- What are the available package options for the TPS3839G33DQNR?
The device is available in a 4-pin, 1-mm × 1-mm (DQN) X2SON package and a 3-pin SOT23 (DBZ) package.
- What is the negative-going threshold voltage for the TPS3839G33?
The negative-going threshold voltage is between 3.003 V and 3.126 V.
- What is the hysteresis voltage for the TPS3839G33?
The hysteresis voltage is 31 mV.
- How does the device handle low-level output voltage?
The low-level output voltage (VOL) is typically 0.4 V when VDD is between 1.2 V and 2.8 V with an IOL of 0.5 mA.
- What are some typical applications for the TPS3839G33DQNR?
Typical applications include single-cell alkaline battery monitoring, wearables, tablets, mobile devices, and medical devices like glucose monitors.
- What is the recommended input capacitor for the TPS383x devices?
A small 0.1-µF bypass capacitor is recommended near the VDD pin.
