Overview
The TPS3808G01QDRVRQ1 is a low-quiescent-current programmable-delay supervisory circuit produced by Texas Instruments. This device is designed to monitor system voltages ranging from 0.4 V to 5 V and assert an active low, open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin is asserted to a logic low. The TPS3808G01QDRVRQ1 is particularly suited for battery-powered applications due to its very low typical quiescent current of 2.4 μA. It is available in small SOT-23 and WSON packages and is fully specified over a temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Min | Typical | Max | Unit |
|---|---|---|---|---|
| VDD Input Supply Range | 1.8 | 6.5 | V | |
| IDD Supply Current (VDD = 3.3 V, RESET not asserted, MR, RESET, CT open) | 2.4 | 5 | μA | |
| IDD Supply Current (VDD = 6.5 V, RESET not asserted, MR, RESET, CT open) | 2.7 | 6 | μA | |
| VOL Low-Level Output Voltage (1.3 V ≤ VDD < 1.8 V, IOL = 0.4 mA) | 0.3 | V | ||
| VOL Low-Level Output Voltage (1.8 V ≤ VDD ≤ 6.5 V, IOL = 1 mA) | 0.4 | V | ||
| VIT Negative-Going Input Threshold Accuracy (VIT ≤ 3.3 V) | –1.5% | ±0.5% | 1.5% | % |
| Reset Delay Time | 1.25 ms | 10 s | ||
| Operating Junction Temperature Range | –40°C | 125°C | °C |
Key Features
- Power-On Reset Generator With Adjustable Delay Time: 1.25 ms to 10 s
- Very Low Quiescent Current: 2.4 μA Typical
- High Threshold Accuracy: 0.5% Typical for VIT ≤ 3.3 V
- Fixed Threshold Voltages for Standard Voltage Rails From 1.2 V to 5 V and Adjustable Voltage Down to 0.4 V
- Manual Reset (MR) Input
- Open-Drain RESET Output
- Temperature Range: –40°C to +125°C
- Small SOT-23 and WSON Packages
- Immune to Short Negative Transients on the SENSE Pin
Applications
- DSP or Microcontroller Applications
- FPGA and ASIC Applications
- Automotive Vision Systems
- Automotive Radar Systems
- Battery-Powered Devices
Q & A
- What is the typical quiescent current of the TPS3808G01QDRVRQ1? The typical quiescent current is 2.4 μA.
- What is the range of the adjustable reset delay time? The reset delay time can be adjusted from 1.25 ms to 10 s.
- How can the reset delay time be configured? The delay can be configured by connecting the CT pin to VDD using a resistor, leaving the CT pin open, or connecting the CT pin to an external capacitor.
- What is the temperature range for the TPS3808G01QDRVRQ1? The device is fully specified over a temperature range of –40°C to +125°C.
- What types of packages are available for the TPS3808G01QDRVRQ1? The device is available in SOT-23 and WSON packages.
- Can the TPS3808G01QDRVRQ1 monitor any voltage rail? Yes, it can monitor any voltage rail down to 0.405 V using an external resistor divider.
- What is the purpose of the manual reset (MR) input? The manual reset (MR) input allows a processor or other logic circuits to initiate a reset by driving the MR pin to a logic low.
- How does the device handle short negative transients on the SENSE pin? The device is immune to short negative transients on the SENSE pin.
- What are some common applications for the TPS3808G01QDRVRQ1? Common applications include DSP or microcontroller applications, FPGA and ASIC applications, automotive vision systems, and automotive radar systems.
- Is the TPS3808G01QDRVRQ1 qualified for automotive applications? Yes, it is qualified for automotive applications.
