Overview
The ADM1275-1ACPZ-R7, produced by Analog Devices Inc., is a hot-swap controller designed to facilitate the safe insertion and removal of circuit boards from a live backplane. This component is crucial in power management systems, ensuring that the transition of boards does not disrupt the power supply or cause damage to the system. It integrates current and voltage readback capabilities via a 12-bit analog-to-digital converter (ADC) and supports a PMBus interface for monitoring and control.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Response Time to Short Circuit | 370 | ns |
| Current Limit Range | 5 mV to 25 mV | - |
| Current Limit Accuracy | ±1% | - |
| ADC Resolution | 12-bit | - |
| Gate Drive Voltage | High gate drive voltage for lowest RDSON | - |
| Package Types | 20-lead QSOP, 20-lead LFCSP | - |
| Input Voltage Range | 2.95V to 20V | V |
| Overvoltage Threshold | 0.97 to 1.03 V | V |
| Overvoltage Hysteresis | 50 to 70 mV | mV |
Key Features
- Resistor-programmable current limit from 5 mV to 25 mV with ±1% accuracy
- Integrated 12-bit ADC for current and voltage readback
- PMBus interface for monitoring and control
- Charge-pumped gate drive for multiple external N-channel FETs
- Foldback for tighter FET SOA protection
- Automatic retry or latch-off on current fault
- Programmable current limit timer for SOA protection
- Programmable, multifunction general-purpose outputs (GPOs)
- Power-good status output
- Analog undervoltage (UV) and overvoltage (OV) protection
Applications
- Power monitoring and control/power budgeting
- Central office equipment
- Telecommunication and data communication equipment
- PCs and servers
Q & A
- What is the primary function of the ADM1275-1ACPZ-R7?
The primary function is to act as a hot-swap controller, allowing safe insertion and removal of circuit boards from a live backplane.
- What is the range of the current limit for the ADM1275-1ACPZ-R7?
The current limit can be set between 5 mV and 25 mV using a resistor divider network.
- What type of ADC is integrated into the ADM1275-1ACPZ-R7?
A 12-bit analog-to-digital converter (ADC) for current and voltage readback.
- What interface does the ADM1275-1ACPZ-R7 use for monitoring and control?
PMBus interface.
- What types of protection does the ADM1275-1ACPZ-R7 offer?
Undervoltage (UV) and overvoltage (OV) protection, as well as foldback for tighter FET SOA protection.
- Can the ADM1275-1ACPZ-R7 be configured for automatic retry or latch-off on current fault?
- What are the package types available for the ADM1275-1ACPZ-R7?
20-lead QSOP and 20-lead LFCSP.
- What is the input voltage range for the ADM1275-1ACPZ-R7?
2.95V to 20V.
- Is the ADM1275-1ACPZ-R7 still in production?
No, it has been announced for discontinuance with a last time buy date of 01-Mar-2026 and a last time ship date of 01-Sep-2026.
- What is the recommended replacement for the ADM1275-1ACPZ-R7?
The recommended replacement is the ADM1281-1ACPZ.
