Overview
The LM3880MFE-1AB/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 or 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 | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range (VCC to GND) | 2.7 | 5.5 | V | |
| Quiescent Current (IQ) | 25 | 80 | µA | |
| Junction Temperature | -40 | 125 | °C | |
| Enable Pin Voltage Range | -0.3 | VCC + 0.3 | V | |
| Flag Output Voltage Low (VOL) | 0.4 | V | ||
| Flag Leakage Current (IFLAG) | 1 | 20 | nA | |
| Timer Delay Accuracy (td1, td2, td3) | -15% | 15% | % | |
| Package Type | SOT-23 (6 pins) | |||
| Thermal Resistance (RθJA) | 187.6 | °C/W |
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.
- Tiny 2.9-mm x 1.6-mm footprint in a 6-pin SOT-23 package.
- Low quiescent current of 25 µA.
- Open-drain output flags that can be pulled up to distinct voltage supplies separate from the sequencer VDD.
- EPROM capability for fully adjustable delays and sequences.
- Precision enable pin with internal comparator referenced to a bandgap voltage (1.25 V).
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 LM3880MFE-1AB/NOPB?
The primary function is to control the power-up and power-down sequencing of multiple independent voltage rails.
- What is the input voltage range for the LM3880?
The input voltage range is from 2.7 V to 5.5 V.
- How many voltage rails can be sequenced using a single LM3880 device?
A single LM3880 can sequence three voltage rails.
- Can multiple LM3880 devices be cascaded?
- What is the quiescent current of the LM3880?
The quiescent current is 25 µA.
- How are the timing delays adjusted in the LM3880?
The timing delays can be adjusted using external capacitors or resistors connected to the enable pin.
- What is the package type and size of the LM3880?
The package type is SOT-23 with a footprint of 2.9-mm x 1.6-mm.
- What are the thermal resistance characteristics of the LM3880?
The junction-to-ambient thermal resistance (RθJA) is 187.6 °C/W.
- Can the output flags be pulled up to different voltage supplies?
- What are some common applications of the LM3880?
Common applications include ADAS, automotive camera modules, security cameras, servers, networking elements, FPGA power supply sequencing, and microprocessor/microcontroller sequencing.
