Overview
The LP3470M5-2.93/NOPB is a micropower voltage supervisory circuit produced by Texas Instruments. This device is designed to monitor voltages within 1% of the reset threshold over temperature, making it ideal for use in microprocessor and digital systems. It provides a simple solution for power-on-reset (POR) and supervisory functions, ensuring system reliability and stability.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-23 (5 pins) |
| Body Size | 1.60 mm × 2.90 mm |
| Reset Threshold Voltage | 2.93 V |
| Reset Time-Out Period | Programmable using an external capacitor (tRP = 2000 × C1 in µF and ms) |
| Quiescent Current | 16 µA (typical) |
| Reset Output | Open-drain, active-low |
| Operating Temperature Range | -40°C to 85°C |
| Thermal Resistance (Junction-to-Ambient) | 171 °C/W |
Key Features
- Programmable reset time-out period using an external capacitor
- ±1% reset threshold accuracy over temperature
- Low quiescent current (16 µA typical)
- Immune to short VCC transients
- Reset valid down to VCC = 0.5 V
- Open-drain reset output requiring an external pullup resistor
Applications
- Critical microprocessor and microcontroller power monitoring
- Intelligent instruments
- Computers
- Portable and battery-powered equipment
Q & A
- What is the primary function of the LP3470M5-2.93/NOPB? The primary function is to monitor the supply voltage and assert a reset signal if the voltage falls below the reset threshold.
- How is the reset time-out period programmed? The reset time-out period is programmed using an external capacitor connected to the SRT pin.
- What is the reset threshold voltage for the LP3470M5-2.93/NOPB? The reset threshold voltage is 2.93 V.
- What is the typical quiescent current of the LP3470M5-2.93/NOPB? The typical quiescent current is 16 µA.
- What type of reset output does the LP3470M5-2.93/NOPB have? The reset output is open-drain, active-low.
- How should the reset output be connected? The reset output should be connected to an external pullup resistor.
- What is the operating temperature range of the LP3470M5-2.93/NOPB? The operating temperature range is -40°C to 85°C.
- Is the LP3470M5-2.93/NOPB immune to VCC transients? Yes, it is relatively immune to short duration negative-going VCC transients.
- What is the package type of the LP3470M5-2.93/NOPB? The package type is SOT-23 with 5 pins.
- How does the device ensure system reliability? The device ensures system reliability by providing a controlled reset signal based on the monitored voltage, preventing system malfunction due to voltage drops.
