Overview
The LM3880MFX-1AA/NOPB, produced by Texas Instruments, is a simple power supply sequencer designed to control the power-up and power-down sequencing of multiple independent voltage rails. This device is particularly useful in systems where controlled startup and shutdown of power supplies are crucial to avoid latch conditions and large in-rush currents. The LM3880 is available in a compact 6-pin SOT-23 package, making it suitable for a variety of applications where space is limited.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.7 | - | 5.5 | V |
| Operating Temperature Range | -40 | - | 125 | °C |
| Quiescent Current (IQ) | 25 | 80 | - | µA |
| Flag Output Voltage Low (VOL) | - | - | 0.4 | V |
| Flag Leakage Current (IFLAG) | - | - | 20 | nA |
| Time Delay Options | - | - | 2, 10, 16, 30, 60, 120 ms | - |
| Package Type | - | - | SOT-23 (DBV) | - |
| Package Size | - | - | 2.9 mm x 1.6 mm | - |
Key Features
- Simple solution for sequencing three voltage rails from a single input signal.
- Easily cascade up to three devices to sequence as many as nine voltage rails.
- Power-up and power-down control with adjustable timing using external capacitors or resistors.
- Low quiescent current of 25 µA.
- Tiny 2.9-mm x 1.6-mm footprint in a 6-pin SOT-23 package.
- Open-drain output flags that can be pulled up to distinct voltage supplies.
- EPROM capability for fully adjustable delays and sequences.
- Precision enable pin with internal comparator referenced to a bandgap voltage.
Applications
- Advanced driver assistance systems (ADAS).
- Automotive camera modules.
- Security cameras.
- Servers and networking elements.
- FPGA power supply sequencing.
- Microprocessor and microcontroller sequencing.
- Multiple supply sequencing in various electronic systems.
Q & A
- What is the primary function of the LM3880?
The LM3880 is a simple power supply sequencer designed to control the power-up and power-down sequencing of multiple independent voltage rails.
- What is the package type and size of the LM3880?
The LM3880 is available in a 6-pin SOT-23 package with a footprint of 2.9 mm x 1.6 mm.
- What is the input voltage range for the LM3880?
The input voltage range for the LM3880 is from 2.7 V to 5.5 V.
- How many voltage rails can be sequenced using the LM3880?
The LM3880 can sequence three voltage rails from a single input signal, and up to nine rails can be sequenced by cascading three devices.
- What is the quiescent current of the LM3880?
The quiescent current of the LM3880 is 25 µA.
- Can the timing delays of the LM3880 be adjusted?
Yes, the timing delays of the LM3880 can be adjusted using external capacitors or resistors.
- What are some common applications of the LM3880?
The LM3880 is used in advanced driver assistance systems (ADAS), automotive camera modules, security cameras, servers, networking elements, FPGA power supply sequencing, and microprocessor/microcontroller sequencing.
- How does the LM3880 avoid latch conditions during power-down?
The LM3880 avoids latch conditions during power-down by having the output flags follow a reverse sequence.
- Is the LM3880 RoHS compliant?
Yes, the LM3880 is RoHS compliant.
- What is the operating temperature range of the LM3880?
The operating temperature range of the LM3880 is from -40°C to 125°C.
