ISL62382C High-Efficiency Quad or Triple-Output System Power Supply Controller for Notebook Computers

The ISL62381, ISL62382, ISL62383, ISL62381C, ISL62382C, and ISL62383C family of controllers generate supply voltages for battery-powered systems. These controllers include two pulse-width modulation (PWM) controllers, adjustable from 0.6V to 5.5V, and two linear regulators, LDO5 and LDO3, that generate a fixed 5V and an adjustable output respectively, with each capable of delivering up to 100mA. The ISL62383 and ISL62383C models have the same outputs as the ISL62381, ISL62382, ISL62381C, and ISL62382C but lack the LDO3 linear regulator. The channel 2 switching regulator will automatically take over the LDO5 load when programmed to a 5V output, which provides significant power savings and enhances efficiency. These controllers feature onboard power-up sequencing, two power-good (PGOOD) outputs, digital soft-start, and internal soft-stop output discharge to prevent negative voltages during shutdown. The patented R3 PWM control scheme ensures low jitter and fast response to load transients. Light-load efficiency is enhanced through period-stretching discontinuous conduction mode (DCM) operation. To minimize noise in audio frequency applications, an ultrasonic DCM mode is included, limiting the minimum switching frequency to approximately 28kHz. The ISL62381, ISL62382, ISL62381C, and ISL62382C are available in a 32-lead 5x5 TQFN package, while the ISL62383 and ISL62383C are available in a 28-lead 4x4 TQFN package. This family of controllers operates over an extended temperature range of -10 °C to +100 °C.

The ISL62381 series controllers are designed to efficiently manage power supply requirements in battery-operated devices. The inclusion of two PWM controllers allows for a flexible output voltage range, catering to various application needs. The adjustable output voltage from 0.6V to 5.5V enables compatibility with a wide range of components, while the fixed 5V output from LDO5 ensures a stable supply for critical circuits.

The design of these controllers emphasizes efficiency, particularly in low-load conditions. The period-stretching DCM operation optimizes performance by reducing switching losses, which is particularly beneficial in scenarios where the load fluctuates frequently. The ultrasonic DCM mode is a notable feature for audio applications, as it minimizes electromagnetic interference by maintaining a higher minimum switching frequency, thereby reducing noise.

Power management features such as power-good outputs and soft-start mechanisms contribute to the reliability and stability of the power supply. Power-good indicators signal the status of the output voltages, ensuring that downstream components operate within specified voltage levels. The digital soft-start feature prevents inrush currents during startup, while the internal soft-stop discharge mechanism ensures that the output voltage does not drop below ground during shutdown, protecting sensitive components from damage.

The thermal performance of the ISL62381 controllers is enhanced by their ability to operate across a wide temperature range, making them suitable for various environmental conditions. The compact TQFN packages facilitate easy integration into space-constrained designs, and the robust construction ensures long-term reliability in diverse applications. Overall, the ISL62381 series controllers offer a comprehensive solution for managing power in battery-powered systems, balancing efficiency, performance, and reliability.The ISL62381, ISL62382, ISL62383, ISL62381C, ISL62382C and ISL62383C family of controllers generate supply voltages for battery-powered systems. These controllers include two pulse-width modulation (PWM) controllers, adjustable from 0. 6V to 5. 5V, and two linear regulators, LDO5 and LDO3, that generate a fixed 5V and an adjustable output respective

ly, and each can deliver up to 100mA. The ISL62383 and ISL62383C have the same outputs as the ISL62381, ISL62382, ISL62381C and ISL62382C but without LDO3 linear regulator. The channel 2 switching regulator will automatically take over the LDO5 load when programmed to 5V output.

This provides a large power savings and boosts efficiency. These controllers include onboard power-up sequencing, two power-good (PGOOD) outputs, digital soft-start, and internal soft-stop output discharge that prevent negative voltages on shutdown. The patented R3 PWM control scheme provides a low jitter system with fast response to load transients.

Light-load efficiency is improved with period-stretching discontinuous conduction mode (DCM) operation. To eliminate noise in audio frequency applications, an ultrasonic DCM mode is included, which limits the minimum switching frequency to approximately 28kHz.

The ISL62381, ISL62382, ISL62381C and ISL62382C are available in a 32 Ld 5x5 TQFN package, and the ISL62383 and ISL62383C are available in a 28 Ld 4x4 TQFN package. This family of controllers can operate over the extended temperature range (-10 °C to +100 °C). 🔗 External reference