Overview
The ADM1170-1AUJZ-RL7, produced by Analog Devices Inc., is a hot swap controller designed to safely enable the removal and insertion of a printed circuit board into a live backplane. This device operates over a supply voltage range of 2.7 V to 16.5 V and includes an undervoltage lockout (UVLO) circuit to ensure proper operation. The ADM1170 features an initial timing cycle that ensures the board is fully inserted before turning on the FET, and it monitors inrush current through an external sense resistor to prevent overcurrent conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.7 V to 16.5 V | V |
| Package Type | TSOT-23-8 | |
| Thermal Resistance (θJA) | 152.9 °C/W | °C/W |
| UVLO Threshold | Dependent on supply voltage | V |
| Current Limit | 50 mV/RSENSE | mV/Ω |
| Retry Duty Cycle (ADM1170-1) | 3.8% | % |
| Pins | 8 |
Key Features
- Hot swap capability for safe insertion and removal from a live backplane.
- Undervoltage lockout (UVLO) circuit to ensure proper operation.
- Initial timing cycle to ensure board insertion before FET turn-on.
- Inrush current monitoring and overcurrent protection.
- Auto-retry function on the ADM1170-1 model.
- Latch-off function on the ADM1170-2 model.
- Soft start capability via an external capacitor.
- ESD protection circuitry.
- RoHS compliant.
Applications
The ADM1170-1AUJZ-RL7 is suitable for various applications where hot swapping of circuit boards is necessary, such as in data centers, telecommunications equipment, and other systems requiring live backplane connections. It is particularly useful in scenarios where protecting the backplane from excess currents during board insertion or removal is critical.
Q & A
- What is the supply voltage range of the ADM1170-1AUJZ-RL7? The supply voltage range is from 2.7 V to 16.5 V.
- What type of package does the ADM1170-1AUJZ-RL7 come in? It comes in a TSOT-23-8 package.
- What is the thermal resistance (θJA) of the ADM1170-1AUJZ-RL7? The thermal resistance is 152.9 °C/W.
- How does the ADM1170-1AUJZ-RL7 handle overcurrent conditions? It actively limits overcurrent conditions to 50 mV/RSENSE and has a circuit breaker timer limit.
- Does the ADM1170-1AUJZ-RL7 have an auto-retry function? Yes, the ADM1170-1 model has an auto-retry function after a current limit fault.
- What is the purpose of the UVLO circuit in the ADM1170-1AUJZ-RL7? The UVLO circuit ensures that the device operates only when the supply voltage is sufficient for proper operation.
- How does the ADM1170-1AUJZ-RL7 protect against ESD? It features proprietary ESD protection circuitry, but proper ESD precautions are still recommended.
- Is the ADM1170-1AUJZ-RL7 RoHS compliant? Yes, it is RoHS compliant.
- What is the function of the TIMER pin in the ADM1170-1AUJZ-RL7? The TIMER pin sets the periods for the initial timing cycle and the circuit breaker timer limit using an external capacitor.
- How does the ADM1170-1AUJZ-RL7 handle the insertion of a board into a live backplane? It ensures the board is fully inserted before turning on the FET through an initial timing cycle.
