Overview
The LM5069MMX-2, produced by Texas Instruments, is a positive high-voltage hot swap and inrush current controller designed to provide intelligent control of power supply connections during the insertion and removal of circuit cards from live system backplanes or other hot power sources. This device ensures safe and controlled power management, preventing system voltage droop and transients. It is available in a 10-pin VSSOP package and operates over a wide voltage range from 9 V to 80 V.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| VIN to GND | -0.3 | 100 | V | |
| SENSE, OUT, and PGD to GND | -0.3 | 100 | V | |
| GATE to GND | -0.3 | 100 | V | |
| Operating Temperature Range | -40 | 125 | °C | |
| Power Limit Sense Voltage (PWRLIM-1) | 19 | 25 | 31 | mV |
| GATE Output Voltage | 11.4 | 12 | 12.6 | V |
| Insertion Time Current | 3 | 5.5 | 8 | µA |
Key Features
- Wide operating range: 9 V to 80 V
- In-rush current limit for safe board insertion into live power sources
- Programmable maximum power dissipation in the external pass device
- Adjustable current limit
- Circuit breaker function for severe overcurrent events
- Internal high side charge pump and gate driver for external N-channel MOSFET
- Adjustable undervoltage lockout (UVLO) and hysteresis
- Adjustable overvoltage lockout (OVLO) and hysteresis
- Initial insertion timer allows ringing and transients to subside after system connection
- Programmable fault timer avoids nuisance trips
- Active high open drain POWER GOOD output
- Available in latched fault and automatic restart versions
- 10-Pin VSSOP package
Applications
- Server backplane systems
- Base station power distribution systems
- Solid state circuit breaker
- 24-V and 48-V Industrial systems
Q & A
- What is the operating voltage range of the LM5069MMX-2?
The LM5069MMX-2 operates over a wide voltage range from 9 V to 80 V.
- What is the purpose of the in-rush current limit feature?
The in-rush current limit feature is designed to limit system voltage droop and transients during board insertion into live power sources.
- Can the current limit and power dissipation be programmed?
- What is the function of the POWER GOOD output?
The POWER GOOD output indicates when the output voltage is within 1.25 V of the input voltage.
- How does the device handle overcurrent events?
The device features a circuit breaker function for severe overcurrent events.
- What types of fault handling are available?
The LM5069-1 latches off after a fault detection, while the LM5069-2 automatically restarts at a fixed duty cycle.
- What is the package type and pin count of the LM5069MMX-2?
The LM5069MMX-2 is available in a 10-pin VSSOP package.
- What are the key applications of the LM5069MMX-2?
The key applications include server backplane systems, base station power distribution systems, solid state circuit breakers, and 24-V and 48-V industrial systems.
- Is the LM5069MMX-2 RoHS compliant?
- What is the operating temperature range of the LM5069MMX-2?
The operating temperature range is from -40°C to 125°C.
