Packaging information
| Package | Pins WSON (DRR) | 12 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 3,000 | LARGE T&R |
Features for the LM7311
- Wide operating input voltage
range: 3.5V to 23V
- 28V absolute maximum
- Output negative voltage support up to -1V
- Integrated back-to-back FETs with low ON-resistance: RON = 33mΩ (typical)
- 5A continuous current
- 15A peak current for 10ms with 2% duty cycle
- Active high enable input with adjustable undervoltage lockout (UVLO)
- Ideal diode operation with true reverse-current blocking (RCB)
- Fixed overvoltage (OVLO) protection with debounce time
- Analog load current monitor
output (IMON)
- Current range: 1A to 5.5A
- Accuracy: ±3% (IOUT≥3A)
- Short circuit protection at startup and steady state
- Adjustable output slew rate control (dVdT)
- Overtemperature protection
- IEC61000-4-2: ±8kV direct contact and ±15kV air discharge on VIN and VOUT
- IEC61000-4-5: 35V on VIN, no cap
- Digital output: fault indication (FLT)
- Small footprint: DFN 3mm × 3mm
Description for the LM7311
The LM7311x family is a highly integrated, circuit-protection and power-management device in a small package. The devices provide multiple protection modes that use few external components and are a robust defense against overloads, short-circuits, voltage surges and excessive inrush current. With integrated back-to-back FETs, reverse-current flow from output to input is blocked at all times, making the devices an excellent choice for ORing applications, as well as systems that need load side energy holdup storage if input power supply fails. The devices use a linear ORing based scheme to maintain almost zero DC reverse current and emulate ideal diode behavior with minimum forward voltage drop and power dissipation.
Output slew rate and inrush current can be adjusted using one external capacitor. Loads are protected from input overvoltage conditions by cutting off the output if input exceeds the fixed overvoltage threshold.
The device provides an accurate sense of the output load current on the analog current monitor pin.
The device provides robust protection from overvoltages and short-circuit protection in start-up (ISFT) and Steady state (IFFT). The negative 1V DC support on VOUT provides additional robustness during inductive negative transients at VOUT.
The devices are available in a 3mm × 3mm, for improved thermal performance and reduced system footprint.
The devices are characterized for operation over a junction temperature range from –40°C to +125°C.