Automotive PMIC runs ECUs in difficult power conditions

November 18, 2015 // By Graham Prophet
Enabling automotive electronic control units to handle harsh electrical conditions, Cypress' power management IC's buck-boost technology enables a compact, low-power solution to manage extreme battery voltage fluctuation for ADAS, body control modules and instrument cluster systems

The Cypress S6BP20x series of automotive integrated power management ICs (PMICs) employs a one-channel, buck-boost DC/DC converter, yielding small form factor ECU power management solutions that use only one ceramic capacitor instead of the two bulky, expensive electrolytic capacitors required by legacy PMICs.

Cypress also adds the S6BP50x PMIC series for automotive instrument cluster systems to its portfolio. The 3-channel output PMICs integrate a buck controller, a buck converter and a boost converter, along with a Spread Spectrum Clock Generator (SSCG), all in a single chip.

Cypress’s S6BP20x automotive PMICs require only nine external components, providing a small PCB layout and reducing the system’s bill of materials. The PMICs consume only 20 µA of quiescent current, extending battery life, and they feature an input voltage range of 2.5-42V. Cypress offers the Easy DesignSim verification tool and evaluation kits to accelerate automotive electronics design.

S6BP20x PMICs occupy a 16-pin HTSSOP package. The series includes:

• S6BP201A with an output current of 1.0A and a 5.0 to 5.2V output voltage range; for body control modules

• S6BP202A with an output current of 2.4A and a 5.0 to 5.2V output voltage range; for instrument clusters and ADAS

• S6BP203A with an output current of 2.4A and a 3.3V output voltage; for high-end ADAS.

S6BP50x PMICs come in a 32-pin side-wettable QFN package. The series includes:

• S6BP501A with a maximum output current of 1.4A at 1.0 to 1.3V output voltage, 1.6A at 3.2 to 3.4V output voltage and 1.3A at 5.0 to 5.2V output voltage; optimised for low-end hybrid instrument cluster systems.

• S6BP502A with a maximum output current of 2.0A at 1.0 to 1.3V output voltage, 1.9A at 3.2 to 3.4V output voltage and 1.3A at 5.0 to 5.2V output voltage; for mid-range hybrid instrument cluster systems.

Cypress; www.cypress.com