Overview
The LM5069MM-1/NOPB is a positive high-voltage hot swap controller manufactured by Texas Instruments. This device is 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. It ensures safe and controlled power-up and power-down sequences, limiting in-rush current and preventing system voltage droop and transients.
The LM5069MM-1/NOPB is available in a 10-pin VSSOP package and operates over a wide voltage range of 9 V to 80 V. It features programmable maximum power dissipation, adjustable current limit, and circuit breaker functions for severe overcurrent events. The device also includes an internal high-side charge pump and gate driver for an external N-channel MOSFET.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | VSSOP (DGS) | - |
| Pins | 10 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage (VIN) | 9 to 80 | V |
| Junction Temperature (TJ) | -40 to 125 | °C |
| Power-On Reset Threshold at VIN | 7.6 to 8 | V |
| Gate Output Voltage in Normal Operation | 11.4 to 12.6 | V |
| Junction-to-Ambient Thermal Resistance (RθJA) | 156 | °C/W |
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 (LM5069-1) and automatic restart (LM5069-2) versions
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 LM5069MM-1/NOPB?
The LM5069MM-1/NOPB operates over a voltage range of 9 V to 80 V.
- What type of package does the LM5069MM-1/NOPB come in?
The device is available in a 10-pin VSSOP (DGS) package.
- What is the purpose of the in-rush current limit feature?
The in-rush current limit feature ensures safe board insertion into live power sources by limiting the initial surge of current.
- Can the maximum power dissipation in the external pass device 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.
- Are there different versions of the LM5069MM-1/NOPB for fault handling?
- What is the junction temperature range for the LM5069MM-1/NOPB?
The junction temperature range is -40°C to 125°C.
- Can the undervoltage and overvoltage lockout levels be adjusted?
- What is the purpose of the initial insertion timer?
The initial insertion timer allows ringing and transients to subside after system connection.
- How does the programmable fault timer function?
The programmable fault timer avoids nuisance trips by setting a specific time before the device reacts to a fault condition.
