S-8358B40MC-NQZT2U

Overview

The S-8358B40MC-NQZT2U is a step-up switching regulator controller from ABLIC, designed for battery-powered applications. It operates within an input voltage range of 0.9V to 10V and delivers a fixed output voltage of 4.0V. The device features a low quiescent current of 25.9µA and supports PWM/PFM modes with a switching frequency of 100kHz. It utilizes a boost topology in a compact SOT-23-5 package, suitable for surface-mount installation across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates PWM/PFM control for optimized efficiency across varying load conditions
• Maintains ultra-low standby power consumption through minimized quiescent current
• Supports wide input voltage ranges compatible with single-cell lithium-ion batteries

Applications

• Portable electronic devices requiring efficient power management
• Battery-operated sensor modules
• Mobile communication equipment

Procurement Notes

Verify the specific suffix NQZT2U against official ABLIC documentation to confirm tape-and-reel packaging specifications and marking codes. Ensure compatibility with standard SOT-23-5 footprint designs. Cross-reference RoHS compliance status directly with the manufacturer's latest environmental declaration before finalizing procurement orders.

Selection Notes

Select this component when a fixed 4.0V output is required from a variable input source. The 100kHz switching frequency balances component size and efficiency. Verify that the external inductor and diode selections support the internal driver capabilities. Confirm that the application load does not exceed the controller's drive limits without additional circuitry.

Part Context

This part belongs to the S-8358 series of step-up switching regulator controllers. The series is characterized by high integration and low power consumption, targeting portable electronics. The S-8358 family offers various fixed output voltages, allowing designers to choose specific variants based on system voltage requirements while maintaining consistent interface and performance characteristics.

Replacement Considerations

Direct substitutes include other S-8358 variants with different output voltages if the 4.0V requirement can be adjusted. Check pin-to-pin compatibility with similar boost controllers from ABLIC or other manufacturers, ensuring identical package dimensions and electrical parameters.