LM2937IMP-3.3/NOPB

LM2937IMP-3.3/NOPB Description

The LM2937-2.5 and LM2937-3.3 are positive voltage regulators capable of supplying up to 500 mA of load current. Both regulators are ideal for converting a common 5-V logic supply, or higher input supply voltage, to the lower 2.5-V and 3.3-V supplies to power very-large-scale integrations (VLSI) ASICs and microcontrollers. Special circuitry has been incorporated to minimize the quiescent current to typically only 10 mA with a full 500-mA load current when the input to output voltage differential is greater than 5 V.
The LM2937 requires an output bypass capacitor for stability. As with most regulators utilizing a PNP pass transistor, the ESR of this capacitor remains a critical design parameter, but the LM2937-2.5 and LM29373.3 include special compensation circuitry that relaxes ESR requirements. The LM2937 is stable for all ESR ratings less than 5 Ω. This allows the use of low ESR chip capacitors.
The regulators are also suited for automotive applications, with built in protection from reverse battery connections, two-battery jumps and up to +60 V/-50 V load dump transients. Familiar regulator features such as short circuit and thermal shutdown protection are also built in.

LM2937IMP-3.3/NOPB Features

Reverse Battery Input Protection
60-V Input Transient Protection
Operating Input Voltage Range : 4.75 V to 26 V
Fully Specified for Operation Over -40°C to 125°C
Output Current in Excess of 500 mA (400 mA forSOT-223 package)
Output Trimmed for 5% Tolerance Under All Operating Conditions
Wide Output Capacitor ESR Range, 0.01 Ω up to 5Ω
Internal Short Circuit and Thermal Overload Protection

LM2937IMP-3.3/NOPB Applications

Automotive
Industrial Control
Point-of-Load Regulation
Required if the regulator is located more than 3 inches from the power supply filter capacitors.
Required for stability. CouT must be at least 10 μF (over full expected operating temperature range) and located as close as possible to the regulator.The equivalent series resistance, ESR, of this capacitor may be as high as 3 Ω.