LDOs target automotive applications

Phoenix, Ariz. — ON Semiconductor has expanded its portfolio of low dropout (LDO) linear voltage regulators for automotive electronics modules that require very low ignition-off currents. Qualified to AEC-Q100 and operating across a wide temperature range, the NCV86xx LDOs combine high levels of on-board functionality with typical quiescent currents (Iq) as low as 22 uA.

Delivering precision output voltages of 3.3 V and 5.0 V and output currents up to 350 mA, the very low Iq, battery-connectable LDOs feature on-board protection functions and include devices with power-on reset and delay time select capabilities. The LDOs are suitable for automotive system power modules that need to meet stringent criteria for current use while vehicle ignition is turned off. By using the LDOs to minimize quiescent current in the regulation portion of the module, designers can allocate more current to higher level design elements including microprocessors and CAN and LIN network components, ON Semiconductor said.

The NCV8660 and NCV8665 families are available with precision 3.3-V and 5.0-V outputs and an output current capability of 150 mA. Devices in both families offer power-on reset and delay time select functionality. Typical quiescent currents are 28 uA and 30 uA, respectively. Also offering output current of 150 mA is a new version of the NCV8664. This device has a typical Iq of 22 uA and can provide a regulated output voltage of either 3.3 V or 5.0 V in designs where integrated power-on reset is not required.

For applications demanding output currents up to 350 mA, the NCV8674 and NCV8675 families are both available with 3.3-V and 5.0-V output options and offer respective typical quiescent currents of 27 uA and 34 uA. The NCV8675 incorporates power-on reset functionality and is available with a choice of reset delay times.

All of the new devices operate with output voltage accuracy of ±2.0 percent and incorporate a variety of on-board protection features. The NCV8664, NCV8665, NCV8674 and NCV8675 feature reverse battery, short circuit and thermal overload protection, while the NCV8660 offers internal short circuit and thermal shutdown functions. These LDOs can sustain input voltage transients inherent to direct battery connection, eliminating the need for intermediate conversion or protection devices, ON Semiconductor said. Operating temperature range is from -40°C to 150°C.

Pricing: The NCV8660 LDOs, in DPAK-5 and SOIC-8 packages, are priced at $1.24-1.38 each in quantities of 2,500. NCV8664 devices, in SOT-223, DPAK-4 and SOIC-8 packages, are priced at $0.90-1.25 each in quantities of 4,000. The NCV8665, available in a D2PAK-5 package, is priced at $1.48 each in quantities of 800. The NCV8674 and NCV8675, supplied in D2PAK-3 and D2PAK-5 packages respectively, are priced at $1.54 and $1.70 each, respectively, in quantities of 800.

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