![]() The typical efficiency at 1 mA is 85%, whereas the peak buck efficiency can be up to 93%. In standby mode, the device enters a low-power mode featuring an extremely low quiescent current (200 ♚) with all regulators on. In normal mode, the converters can be programmed to support different features, such as startup sequencing, soft-start ramp, output voltage levels, current-limit levels, and output discharge for each channel. The device ( Figure 3) can operate in two modes: normal and standby. is a configurable PMIC integrating five independent synchronous buck regulators up to 3 A, one independent non-synchronous boost regulator (200 mA), a high-speed I 2C interface, and an E 2PROM for storing regulators and sequencing parameters. The MIC7401 from Microchip Technology Inc. Due to its extremely compact size, it is the right solution for wearables, connected medical devices, and other size-constrained applications.įigure 2: Nordic nPM1100 (Source: Nordic Semiconductor) Microchip Technology MIC7401 The PMIC allows for charging batteries through USB with automatic port detection. As shown in Figure 2, the PMIC features a small footprint of only 27 mm 2 (passive components included), while the power-conversion efficiency can be as high as 92%. Three charging modes are selectable (automatic trickle, constant current, and constant voltage) and battery thermal protection is included. The integrated battery charger supports lithium-ion and lithium-polymer batteries with different cell chemistries. It can be used as a complementary component to Nordic’s nRF52 and nRF53 SoCs or as a standalone PMIC for any other application. Its first PMIC, the nPM1100, includes a highly efficient dual-mode configurable buck regulator and an integrated battery charger. Known for its low-power short-range wireless chips, Nordic Semiconductor has developed deep experience in the design of low-power devices. Available in a Grade 0 thermally enhanced VQFN-48 package suitable for automated optical inspection, the TLF35584 provides support for ASIL-D functional-safety features, such as UV/OV monitoring, watchdog, error monitoring, safe-state controller with two outputs, and BIST.įigure 1: TLF35584QVHS2 block diagram (Source: Infineon Technologies) Nordic Semiconductor nPM1100 It includes a 5-V low-drop post regulator for communication supply, a 5-V/3.3-V low-drop post regulator for the microcontroller (MCU) supply, and a 5-V voltage reference for the analog-to-digital converter (ADC) and for tracking two independent sensor supplies. The TLF35584QVHS2, whose block diagram is shown in Figure 1, provides eight output voltages (3.3 V, 5 V, and 5.8 V) for safety-relevant applications. ![]() The additional monitoring and supervision functions allow you to meet the safety requirements needed by automotive applications. OPTIREG PMICs offer safe, efficient, and reliable voltage regulation thanks to the presence of pre- and post-regulation circuits, DC/DC converters, linear regulators, and tracking. ![]() Infineon’s OPTIREG series PMICs offer multiple power rails for critical automotive applications such as safety, powertrain, drivetrain, ADAS, body, and car security. In this article, we will look at 10 of the best PMICs available on the market for applications including consumer electronics, wearables, industrial sensors and actuators, IoT, and automotive. Functions commonly integrated into a PMIC include voltage converters and regulators, battery-charging circuits, LED drivers, real-time clocks (RTCs), sequencing, monitoring, and power-control circuits. In addition to reducing the circuit footprint, PMICs improve product reliability and efficiency by integrating advanced protection, thermal management, and noise-immunity features. Power management ICs (PMICs) allow you to effectively and efficiently solve the problem of multiple power supplies, simplifying the project and reducing the application’s time to market.Īble to handle multiple power lines simultaneously using a single chip, PMICs dramatically reduce component count and printed-circuit–board (PCB) space compared with a traditional discrete component solution. As a matter of fact, it is not uncommon today to see applications that require 10 or more different power rails. The different power supply requirements of these components present designers with very demanding challenges. Latest-generation electronic circuits offer an increasing number of features, obtained by using discrete and high-density programmable devices.
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