Overview
The LP3470IM5-4.63/NOPB, produced by Texas Instruments, is a micropower voltage supervisory circuit designed to monitor voltages within 1% of the reset threshold over temperature. This device is particularly useful in microprocessor and digital systems, providing a simple and adjustable solution for power-on-reset (POR) and supervisory functions. It is packaged in a tiny 5-pin SOT-23 package, making it ideal for space-constrained applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOT-23 | - |
| Number of Pins | 5 | - |
| Package Size | 1.60 mm × 2.90 mm | mm |
| Reset Threshold Voltage | 4.63 V | V |
| Reset Threshold Accuracy | ±1% over temperature | % |
| Reset Time-Out Period | Programmable using an external capacitor | - |
| Quiescent Current | 16 µA (typical) | µA |
| Operating Temperature Range | -40°C to 85°C | °C |
| Reset Output Type | Open-drain | - |
| Transient Immunity | Immune to short VCC transients | - |
Key Features
- Tiny 5-pin SOT-23 package
- Open-drain reset output
- Programmable reset time-out period using an external capacitor
- Immune to short VCC transients
- ±1% reset threshold accuracy over temperature
- Low quiescent current (16 µA typical)
- Reset valid down to VCC = 0.5 V
Applications
- Critical microprocessor and microcontroller power monitoring
- Intelligent instruments
- Computers
- Portable and battery-powered equipment
Q & A
- What is the primary function of the LP3470IM5-4.63/NOPB?
The LP3470IM5-4.63/NOPB is a micropower voltage supervisory circuit designed to monitor voltages and provide a reset signal when the VCC supply voltage falls below a specified threshold.
- What is the package type and size of the LP3470IM5-4.63/NOPB?
The device is packaged in a 5-pin SOT-23 package, measuring 1.60 mm × 2.90 mm.
- What is the reset threshold voltage for the LP3470IM5-4.63/NOPB?
The reset threshold voltage for this specific model is 4.63 V.
- How is the reset time-out period adjusted in the LP3470IM5-4.63/NOPB?
The reset time-out period is programmable using an external capacitor connected to the SRT pin.
- What is the quiescent current of the LP3470IM5-4.63/NOPB?
The quiescent current is typically 16 µA.
- Is the LP3470IM5-4.63/NOPB immune to VCC transients?
Yes, the device is immune to short VCC transients.
- What is the operating temperature range of the LP3470IM5-4.63/NOPB?
The operating temperature range is -40°C to 85°C.
- What type of reset output does the LP3470IM5-4.63/NOPB have?
The reset output is an open-drain type.
- How do you ensure the reset output is logic high in the LP3470IM5-4.63/NOPB?
A pullup resistor (typically 20 kΩ) must be connected to VCC to ensure the reset output is logic high.
- What are some common applications of the LP3470IM5-4.63/NOPB?
Common applications include critical microprocessor and microcontroller power monitoring, intelligent instruments, computers, and portable and battery-powered equipment.
