Overview
The ADM1270ARQZ-R7, produced by Analog Devices Inc., is a hot swap controller designed to provide inrush current limiting and overcurrent protection for modular or battery-powered systems. This device is particularly useful when circuit boards are inserted into a live backplane, preventing damage from transient currents and voltage dips. The ADM1270ARQZ-R7 controls the external FET gate to maintain a safe current level, ensuring the system's integrity during power-on sequences.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | Analog Devices Inc. | |
| Part Number | ADM1270ARQZ-R7 | |
| Package | 16-SSOP (0.154", 3.90mm Width) | Surface Mount |
| Type | Hot Swap Controller | |
| Number of Channels | 1 | |
| Internal Switch(s) | No | |
| Voltage - Supply | 4 V ~ 60 V | |
| Operating Temperature | -40°C ~ 125°C | |
| Current - Supply | 360 µA | |
| Programmable Features | Auto Retry, Circuit Breaker, Current Limit, Fault Timeout, Latched Fault, OVP, UVLO |
Key Features
- Inrush Current Limiting: The ADM1270ARQZ-R7 controls the inrush current when powering on the system, preventing damage to connector pins and voltage dips on the backplane supply.
- Overcurrent Protection: The device limits the current through an external sense resistor and controls the gate voltage of an external P-channel FET to maintain the load current below a preset maximum.
- Fast Response to Severe Overcurrent: A high bandwidth current sense amplifier detects severe overcurrent events, such as short circuits, and responds within approximately 2 µs.
- UnderVoltage and OverVoltage Protection (UVLO/OVP): Monitors the supply voltage for undervoltage and overvoltage conditions, turning off the FET in case of an undervoltage event.
- Auto-Retry and Fault Timeout: Features auto-retry and fault timeout mechanisms to handle overcurrent events and protect the external FET.
- Reverse Voltage Protection: Prevents negative input voltages that could damage the load or the ADM1270ARQZ-R7.
Applications
The ADM1270ARQZ-R7 is suitable for general-purpose applications, particularly in systems where hot swapping of circuit boards is required. This includes:
- Modular or battery-powered systems.
- Data centers and server systems where hot swapping is common.
- Telecommunication equipment.
- Industrial control systems.
Q & A
- What is the primary function of the ADM1270ARQZ-R7?
The primary function is to provide inrush current limiting and overcurrent protection for modular or battery-powered systems.
- What is the supply voltage range for the ADM1270ARQZ-R7?
The supply voltage range is from 4 V to 60 V.
- How does the ADM1270ARQZ-R7 protect against severe overcurrent events?
It uses a high bandwidth current sense amplifier to detect severe overcurrent events and responds within approximately 2 µs.
- What are the programmable features of the ADM1270ARQZ-R7?
The device features auto-retry, circuit breaker, current limit, fault timeout, latched fault, OVP, and UVLO.
- What is the operating temperature range of the ADM1270ARQZ-R7?
The operating temperature range is from -40°C to 125°C.
- How does the ADM1270ARQZ-R7 handle undervoltage conditions?
It monitors the supply voltage for undervoltage conditions and turns off the FET if the voltage falls below a certain threshold.
- What type of package does the ADM1270ARQZ-R7 come in?
The device comes in a 16-SSOP (0.154", 3.90mm Width) surface mount package.
- Is the ADM1270ARQZ-R7 RoHS compliant?
- What is the purpose of the sense resistor in the ADM1270ARQZ-R7?
The sense resistor sets the analog current limit by measuring the voltage drop across it.
- How does the ADM1270ARQZ-R7 protect the external FET?
The device limits the time the FET remains on while the current is at its maximum value and includes a foldback pin for additional FET protection.
