S-8337AAIB-P8T1G

Overview

The S-8337AAIB-P8T1G is a CMOS step-up switching regulator controller from the S-8337 series by ABLIC Inc. It operates within an input voltage range of 1.8 V to 6 V and supports a maximum oscillation frequency of 1.133 MHz via an external resistor on the ROSC pin. The device utilizes pulse width modulation (PWM) control with adjustable maximum duty ratios through the RDuty pin. It features internal under-voltage lockout and timer latch short-circuit protection, packaged in an 8-pin SON format.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation
• Supports low-voltage operation starting at 1.8 V suitable for portable systems
• Includes built-in under-voltage lockout and short-circuit protection circuits

Applications

• Power supply for LCD modules
• Portable electronic systems operating on low voltage
• Battery-powered devices requiring step-up conversion

Procurement Notes

Verify the specific suffix P8T1G corresponds to the 8-SON package variant rather than TSSOP. Confirm RoHS compliance status as some datasheet versions indicate details or non-compliance depending on revision. Ensure the ordering quantity matches manufacturer standard packaging requirements when sourcing.

Selection Notes

Select this component when designing boost converters requiring high-frequency operation up to 1.2 MHz with minimal external components. The adjustable duty ratio allows optimization for specific input-output voltage differentials. Consider thermal performance in the small SON package for high-current applications.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8337 series distinguishes itself from the S-8338 series by offering adjustable maximum duty ratios via external resistors, whereas the S-8338 series fixes this parameter internally.

Replacement Considerations

S-8337AAGB-T8T1G

FAQ

How is the oscillation frequency determined?

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

What protection features are included?

The device includes an under-voltage lockout circuit (UVLO) and a timer latch short-circuit protection circuit to ensure safe operation.