Description

The MIC38C42ABM is an electronic component model that belongs to the product category of AC DC Converters and Offline Switchers. It is a fixed frequency, high-performance, current-mode PWM controller that is designed to improve on the earlier 384x bipolar devices. The device has several features that make it suitable for different applications including low power, ultralow start-up current, trimmed 5V bandgap reference, among others.

Specifications and features

• Fast 40ns output rise and 30ns output fall times
• –40°C to +85°C temperature range meets UC284x specifications
• High-performance, low-power BiCMOS Process
• Ultralow start-up current (100µA typical)
• Low operating current (4mA typical)
• CMOS outputs with rail-to-rail swing
• ≥500kHz current-mode operation
• Trimmed 5V bandgap reference
• Pin-for-pin compatible with UC3842/3843/3844/3845
• Trimmed oscillator discharge current
• UVLO with hysteresis
• Low cross-conduction currents

Application Scenarios

The MIC38C42ABM is suitable for use in different types of power supplies including current-mode, off-line, switched-mode power supplies, dc-to-dc converters, step-down “buck” regulators, step-up “boost” regulators, flyback, isolated regulators, forward converters, and synchronous FET converters.

Comparison

• Pin-for-pin compatible with earlier bipolar devices
• High-performance BiCMOS process

• None identified