
- Stock: In Stock
- Brand: Unbranded
- Model: 1-CHIP0500
- SKU: 1-CHIP0500
Realtime Stock
Controller IC Chip - MOSFET ISL6237IRZ ISL6237 chip for laptop- Integrated portable calculator chip(SKU.1-CHIP0500)
High-Efficiency, Quad-Output, Main Power Supply Controllers for Notebook Computers
The ISL6237 dual step-down, switch-mode power-supply (SMPS) controller generates logic-supply voltages in battery-powered systems. The ISL6237 includes two pulse-width modulation (PWM) controllers, 5V/3.3V and 1.5V/1.05V. The output of SMPS1 can also be adjusted from 0.7V to 5.5V. The SMPS2 output can be adjusted from 0.5V to 2.5V by setting REFIN2 voltage. This device features a linear regulator providing 3.3V/5V, or adjustable from 0.7V to 4.5V output via LDOREFIN. The linear regulator provides up to 100mA output current with automatic linear-regulator bootstrapping to the BYP input. When in switchover, the LDO output can source up to 200mA. The ISL6237 includes on-board power-up sequencing, power-good (POK_) outputs, digital soft-start, and internal soft-stop output discharge that prevents negative voltages on shutdown.Constant on-time PWM control scheme operates WITHOUT sense resistors and provides 100ns response to load transients while maintaining a relatively constant switching frequency. The unique ultrasonic pulse-skipping mode maintains the switching frequency above 25kHz, which eliminates noise in audio applications. Other features include pulse skipping, which maximizes efficiency in light-load applications, and fixed-frequency PWM mode, which reduces RF interference in sensitive applications.
• Wide Input Voltage Range 5.5V to 25V• Dual Fixed 1.05V/3.3V and 1.5V/5.0V Outputs or Adjustable 0.7V to 5.5V (SMPS1) and 0.5V to 2.5V (SMPS2), ±1.5% Accuracy• 1.7ms Digital Soft-Start and Independent Shutdown• Fixed 3.3V/5.0V, or Adjustable Output 0.7V to 4.5V, ±1.5% (LDO): 200mA• 2.0V Reference Voltage• Constant ON-TIME Control with 100ns Load-Step Response• Selectable Switching Frequency•rDS(ON) Current Sensing• Programmable Current Limit with Foldback Capability• Selectable PWM, Skip or Ultrasonic Mode• BOOT Voltage Monitor with Automatic Refresh• Independent POK1 and POK2 Comparators• Soft-Start with Pre-Biased Output and Soft-Stop• Independent ENABLE• High Efficiency - Up to 97%• Very High Light Load Efficiency (Skip Mode)• 5mW Quiescent Power Dissipation• Thermal Shutdown• Extremely Low Components Count• Pb-Free (RoHS Compliant)
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