S-8337AAHB-T8T1G

Overview

The S-8337AAHB-T8T1G is a CMOS step-up switching regulator controller from the S-8337 series, manufactured by ABLIC Inc. It operates within a supply voltage range of 1.8 V to 6 V and supports an internal oscillation frequency up to 1.134 MHz via an external resistor on the ROSC pin. The device features PWM control with a maximum duty ratio adjustable through the RDuty pin. Packaged in an 8-TSSOP format, it includes under-voltage lockout and timer latch short-circuit protection circuits for reliable operation.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller in a single CMOS chip
• Supports low-voltage operation starting at 1.8 V suitable for portable systems
• Includes under-voltage lockout and timer latch short-circuit protection mechanisms

Applications

• Power supply for LCD panels
• Portable electronic systems requiring low voltage input
• Step-up DC-DC converter designs

Procurement Notes

Verify component authenticity using official ABLIC documentation and part markings. Confirm package type matches 8-TSSOP specifications. Check RoHS compliance status against current environmental regulations. Ensure ordering quantities align with manufacturer standard packaging requirements. Validate supplier credentials before purchase.

Selection Notes

Select this controller when designing boost converters requiring adjustable switching frequencies up to 1.134 MHz. Consider the adjustable maximum duty ratio feature for specific output voltage requirements. Evaluate thermal performance within the -40°C to 85°C operating temperature range. Assess external component compatibility for oscillator and duty cycle setting resistors.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for applications needing efficient power conversion from low input voltages. The S-8337 variant specifically allows user-adjustable duty ratios, distinguishing it from fixed-duty counterparts like the S-8338 series.

Replacement Considerations

S-8337AAGB-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 1.134 MHz.

What protection features are included?

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