Overview
The LM5067MM-2/NOPB, produced by Texas Instruments, is a negative hot swap 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 controller ensures safe and reliable operation by limiting in-rush current, managing power dissipation, and offering various protection features against over-current and over-voltage conditions.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage Range | -9 V to -80 V |
| Package Type | 10-pin VSSOP, 14-pin SOIC |
| Operating Temperature Range | -40°C to 125°C |
| Maximum Supply Current | 2 mA (min) |
| Maximum Output Current | 500 mA |
| Power Good Output Logic | Active High Open Drain |
| Fault Management | Auto-Restart (LM5067-2), Latched Fault (LM5067-1) |
| External Sense Resistor | Yes |
| Moisture Sensitivity Level | 1 |
| Peak Reflow Temperature | 260°C |
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
- 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
Applications
- Server backplane systems
- In-Rush current limiting
- Solid state circuit breaker
- Transient voltage protector
- Solid state relay
- Undervoltage lock-out
- Power good detector and indicator
Q & A
- What is the operating voltage range of the LM5067MM-2/NOPB?
The operating voltage range is from -9 V to -80 V. - What types of packages are available for the LM5067MM-2/NOPB?
The LM5067MM-2/NOPB is available in 10-pin VSSOP and 14-pin SOIC packages. - What is the maximum output current of the LM5067MM-2/NOPB?
The maximum output current is 500 mA. - How does the LM5067MM-2/NOPB manage fault conditions?
The LM5067MM-2/NOPB can either latch off after a fault detection (LM5067-1) or automatically attempt restarts at a fixed duty cycle (LM5067-2). - What is the purpose of the POWER GOOD output?
The POWER GOOD output indicates when the output voltage is close to the input voltage. - Can the undervoltage and overvoltage lockout levels be adjusted?
Yes, the undervoltage and overvoltage lockout levels and their hysteresis can be adjusted. - What is the role of the initial insertion timer?
The initial insertion timer allows ringing and transients to subside after system connection. - Is the LM5067MM-2/NOPB RoHS compliant?
Yes, the LM5067MM-2/NOPB is RoHS compliant. - What is the maximum operating temperature of the LM5067MM-2/NOPB?
The maximum operating temperature is 125°C. - Can the fault detection time be programmed?
Yes, the fault detection time can be programmed.
