S-8337ABEA-T8T1G

Overview

The S-8337ABEA-T8T1G is a CMOS step-up switching regulator controller from the S-8337 series manufactured by ABLIC Inc. It operates with a minimum input voltage of 1.8 V and supports an internal oscillation frequency adjustable up to 1.133 MHz via an external resistor on the ROSC pin. The device utilizes pulse width modulation (PWM) control with a maximum duty ratio configurable through an external resistor connected to the RDuty pin. Phase compensation and gain are adjusted using components on the CC pin. It features under-voltage lockout and timer latch short-circuit protection, packaged in an 8-TSSOP format.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller within a single CMOS chip.
• Supports low-voltage operation starting at 1.8 V for portable system applications.
• Includes under-voltage lockout and timer latch short-circuit protection circuits.

Applications

• Power supply for LCD displays
• Portable electronic systems operating on low voltage

Procurement Notes

Verify the specific suffix against official ABLIC documentation to confirm exact electrical tolerances and factory settings. Confirm package type matches project requirements. Check RoHS compliance status directly from the manufacturer datasheet. Ensure ordering quantities align with standard reel packaging specifications provided by the supplier.

Selection Notes

Select this component when designing boost converters requiring low input voltage capability down to 1.8 V. The adjustable frequency and duty cycle allow optimization for specific output requirements. Consider the 8-TSSOP package for surface-mount assembly. Verify thermal performance and stability compensation components based on the target load conditions.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for step-up applications where low standby current and wide input voltage ranges are necessary. It serves as a controller IC rather than a complete power stage, requiring external inductors and switches.

Replacement Considerations

S-8337ACDC-T8T1G

FAQ

How is the switching frequency determined?

The internal oscillation frequency is set externally via a resistor connected to the ROSC pin, allowing adjustment up to 1.133 MHz.

What protection features are included?

The device includes an under-voltage lockout circuit and a timer latch short-circuit protection circuit.