Low-Iq regulators are smart automotive choice

Automotive-qualified LDOs combine high levels of onboard functionality with typical quiescent currents (Iq) as low as 22uA.

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 new NCV86xx LDOs combine high levels of onboard functionality with typical quiescent currents (Iq) as low as 22uA.

Delivering precision output voltages of 3.3 and 5.0V and output currents up to 350mA, the new very low-Iq battery-connectable LDOs from ON Semiconductor feature onboard protection functions and include devices with power-on reset and delay time select capabilities.

The LDOs are ideal 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 minimise 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.

The new NCV8660 and NCV8665 families are available with precision 3.3 and 5.0V outputs and an output current capability of 150mA.

Devices in both families offer power-on reset and delay time select functionality.

Typical quiescent currents are 28 and 30uA, respectively.

Also offering output current of 150mA is a new version of the NCV8664.

This device has a typical Iq of just 22uA, and can provide a regulated output voltage of either 3.3 or 5.0V in designs where integrated power-on reset is not required.

For applications demanding output currents up to 350mA, the new NCV8674 and NCV8675 families are both available with 3.3 and 5.0V output options and have respective typical quiescent currents of 27 and 34uA.

The NCV8675 incorporates power-on reset functionality and is available with a choice of reset delay times.

All the new devices operate with output voltage accuracy of +/-2.0% and incorporate a variety of onboard protection features.

The NCV8664, NCV8665, NCV8674 and NCV8675 feature reverse battery, short circuit and thermal overload protection, and 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.

Operating temperature ranges of -40 to +150C are significantly wider than those of many other low-Iq LDOs that are currently available.

The NCV8660 LDOs are available in DPAK-5 and SOIC-8 package options, and are priced at US $1.24-1.38 per unit in 2500-unit quantities.

NCV8664 devices can be supplied in SOT-223, DPAK-4 and SOIC-8 packages at a price of US $0.90-1.25 per unit in 4000-unit quantities.

The NCV8665 is available in a D2PAK-5 package and is priced at US $1.48 per unit in 800-unit quantities.

The NCV8674 and NCV8675 are supplied in D2PAK-3 and D2PAK-5 packaging, respectively, with respective pricing of US $1.54 per unit and $1.70 per unit in 800-unit quantities.

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