Renesas Electronics Corporation Power Supply Controllers, Monitors ISL62391CHRTZ-T

The ISL62391CHRTZ-T is a high-efficiency power supply controller designed for notebook computers and similar battery-powered devices. It features two pulse-width modulation (PWM) controllers that can generate adjustable output voltages ranging from 0.6V to 5.5V, along with a fixed 3.3V linear regulator capable of delivering up to 100mA. The device incorporates on-board power-up sequencing, a power-good output, and digital soft-start functionality, which enhances system reliability during power transitions. This controller utilizes a patented R3 PWM control scheme for low jitter and fast transient response, making it suitable for applications requiring quick load adjustments. It also supports light-load efficiency through a period-stretching discontinuous conduction mode (DCM) and includes an ultrasonic DCM mode to minimize noise in audio applications by limiting the minimum switching frequency to 28kHz. The ISL62391CHRTZ-T operates over a wide input voltage range of 5.5V to 25V and includes comprehensive protection features such as overvoltage, undervoltage, and overcurrent protection, along with thermal monitoring. It is packaged in a 28-lead 4x4 TQFN and is rated for an extended temperature range of -40°C to +100°C, making it suitable for various environmental conditions.