S-8357B33MC-NIST2U

Overview

The S-8357B33MC-NIST2U is a step-up switching controller IC from the ABLIC S-8357 series, designed for positive output boost regulation. It operates within an input voltage range of 0.9V to 10V and delivers a fixed output voltage of 3.3V with a maximum output current of 38.5mA. The device features a low quiescent current of 25.9µA and supports PWM control with a maximum duty cycle of 83%. It functions reliably across a temperature range of -40°C to +85°C and is housed in a compact SOT-23-5 surface-mount package.

Feature Summary

• Integrates a step-up DC-DC controller optimized for battery-powered applications requiring efficient voltage boosting.
• Maintains ultra-low standby current consumption to extend operational life in portable devices.
• Provides stable regulated output through internal PWM control logic with defined duty cycle limits.

Applications

• Portable electronic devices requiring voltage step-up from single-cell lithium batteries
• Battery-operated sensors and IoT modules needing stable 3.3V supply
• Low-power consumer electronics utilizing boost regulation topologies

Procurement Notes

Verify the specific suffix NIST2U against official ABLIC documentation to confirm pinout and thermal characteristics. Ensure compatibility with external inductor and diode selections based on the 38.5mA output limit. Confirm RoHS compliance status via the manufacturer's latest datasheet before integration into production designs.

Selection Notes

Select this component when a fixed 3.3V output is required from variable input sources between 0.9V and 10V. Consider the 25.9µA quiescent current for battery efficiency requirements. Evaluate the SOT-23-5 package constraints for PCB space limitations. Compare against the S-8353 series if integrated power switches are preferred over discrete controller solutions.

Part Context

This part belongs to the ABLIC S-8357 family of switching controllers, distinct from the integrated regulator variants like the S-8353. While similar in packaging and operating conditions, the S-8357 requires external power components, offering flexibility in current handling and topology design compared to fully integrated regulators.

Replacement Considerations

Direct substitutes include other ABLIC S-8357 variants with different output voltages or current ratings, such as S-8357BxxMC-NIST2U. Cross-reference with S-8353 series parts only if external switch integration is acceptable and pin compatibility is verified.