High-voltage linear regulators target automotive apps

Sunnyvale, Calif. — Maxim Integrated Products has introduced two 300 mA automotive linear regulators with a switched output and load-dump protection. The highly integrated MAX15009 and MAX15011 low-dropout (LDO) regulators are designed to withstand harsh operating conditions and are suitable for automotive instrument clusters, infotainment systems, telematics, and climate control applications.

These LDO regulators operate over a 5-V to 40-V supply-voltage range; protect against load-dump transients up to 45 V, and provide short-circuit and thermal-shutdown protection. Offering low power consumption, these linear regulators consume only 70 microamps of quiescent current in a stand-alone configuration, and 16 microamps in shutdown mode. Well suited for always-on circuits, these devices provide enable and hold inputs for “key off” conditions.

To save space and cost in automotive applications, the MAX15009/MAX15011 provide an additional low-resistance switched output that can be used to independently power remote loads. The switched output features a current-limit sensing circuit with an adjustable current limit, as well as adjustable current-limit fault blanking and auto-retry delay. The devices also provide independent enable inputs for the linear regulator, switched output, and over-voltage protector (MAX15009 only) for better control of each function.

To further save cost and improve performance, the MAX15009 integrates an over-voltage-protection (OVP) controller that can be configured as a switch controller or as a voltage limiter. This OVP controller protects downstream circuits from high-voltage load dump.

The MAX15009 and MAX15011 devices are offered in a thermally enhanced, 5 x 5-mm, 32-pin TQFN package, and are fully specified over the -40° to +125°C automotive temperature range.

Pricing: Starts at $1.32 (1000-up, FOB USA).
Datasheet: MAX15009 and MAX15011

Maxim Integrated Products , 1-800-998-8800,

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