HANSCHIP semiconductor LM2937ES-5.0RG

The LM2937 is a positive voltage regulator capable of delivering up to 500 mA of load current. A PNP pass transistor provides low-dropout characteristics. The typical minimum input-to-output voltage differential required to maintain output regulation at 500 mA load current is 0.5 V (maximum value ensured over the full operating temperature range). A special internal circuit reduces quiescent current to a typical value of 10 mA when the input-to-output voltage differential exceeds 3 V at 500 mA load current. The LM2937 requires an output bypass capacitor to ensure stability. As with most LDO regulators, the ESR of this capacitor remains a critical design parameter; however, a special compensation circuit incorporated in the LM2937 relaxes the ESR requirement. The device remains stable with any ESR below 3 Ω, allowing the use of low-ESR chip capacitors. The device is well suited for automotive applications, protecting itself and any load circuitry from reversed battery, dual-battery jumps, and load dump transients up to 60 V/−50 V. Standard regulator protection features such as short-circuit and thermal shutdown protection are also included.

• Fully specified over -40°C to 125°C operating temperature range
• Output current exceeding 500 mA
• Output accuracy trimmed to 5% tolerance under all operating conditions
• Typical dropout voltage of 0.5 V at full-rated load current
• Wide output capacitor ESR range up to 3 Ω
• Internal short-circuit and thermal overload protection
• Reverse battery protection
• 60 V input transient protection
• Mirror image insertion protection

• Automotive electronics
• Industrial control
• Point-of-load regulation