Overview
The LP3470IM5-3.08/NOPB, produced by Texas Instruments, is a micropower voltage supervisory circuit designed to monitor power supplies in microprocessor and other digital systems. This device is part of the LP3470 series and is specifically configured with a reset threshold voltage of 3.08V. It is housed in a compact 5-pin SOT-23 package, making it ideal for space-constrained applications. The LP3470 provides maximum adjustability for power-on-reset (POR) and supervisory functions, ensuring system reliability by asserting a reset signal when the VCC supply voltage falls below the specified threshold.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reset Threshold Voltage | 3.08 | V |
| Package Type | SOT-23 | - |
| Number of Pins | 5 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Quiescent Current | 16 | µA (typical) |
| Reset Time-Out Period | Programmable using an external capacitor | - |
| Reset Output Type | Open-drain N-channel MOSFET | - |
| Minimum VCC for Reset Valid | 0.5 | V |
| Reset Threshold Accuracy Over Temperature | ±1% | - |
Key Features
- Tiny SOT-23-5 package for compact designs
- Open-drain reset output
- Programmable reset time-out period using an external capacitor
- Immune to short VCC transients
- Low quiescent current (16 µA typical)
- Reset valid down to VCC = 0.5 V
- ±1% reset threshold accuracy over temperature
Applications
- Critical microprocessor and microcontroller power monitoring
- Intelligent instruments
- Computers
- Portable and battery-powered equipment
Q & A
- What is the primary function of the LP3470IM5-3.08/NOPB?
The primary function is to monitor the power supply voltage and assert a reset signal if the voltage falls below the specified reset threshold of 3.08V.
- What package type is the LP3470IM5-3.08/NOPB available in?
The device is housed in a 5-pin SOT-23 package.
- What is the operating temperature range of the LP3470IM5-3.08/NOPB?
The operating temperature range is -40°C to 85°C.
- How is the reset time-out period adjusted in the LP3470IM5-3.08/NOPB?
The reset time-out period is adjustable using an external capacitor connected to the SRT pin.
- What type of reset output does the LP3470IM5-3.08/NOPB have?
The reset output is an open-drain N-channel MOSFET.
- What is the minimum VCC voltage for the reset to be valid?
The reset is valid down to VCC = 0.5 V.
- What is the accuracy of the reset threshold voltage over temperature?
The reset threshold voltage accuracy is ±1% over temperature.
- What are some typical applications of the LP3470IM5-3.08/NOPB?
Typical applications include critical microprocessor and microcontroller power monitoring, intelligent instruments, computers, and portable and battery-powered equipment.
- How does the LP3470IM5-3.08/NOPB handle short VCC transients?
The device is immune to short VCC transients.
- What is the typical quiescent current of the LP3470IM5-3.08/NOPB?
The typical quiescent current is 16 µA.
