S-8338AAFA-P8T1G

Overview

The S-8338AAFA-P8T1G is a CMOS step-up switching regulator controller from the S-8338 series by ABLIC Inc. It operates with a minimum input voltage of 1.8 V and supports an internal oscillation frequency up to 1.133 MHz via an external resistor on the ROSC pin. The device features a fixed maximum duty ratio of 88% and utilizes pulse width modulation (PWM) control. It includes an under-voltage lockout circuit and a timer latch short-circuit protection circuit. The reference voltage accuracy is specified at 1.0 V ±1.5%. The component is housed in an 8-pin SON(A) package measuring 2.9 x 2.8 mm.

Feature Summary

• Integrates a high-accuracy reference voltage circuit, oscillator, error amplifier, and PWM controller within a single CMOS chip.
• Features a timer latch short-circuit protection circuit to enhance system reliability during fault conditions.
• Allows adjustment of phase compensation and gain values through external components connected to the CC pin for optimized transient response.

Applications

• Power supply units for LCD displays
• Portable electronic systems requiring low-voltage operation
• Step-up DC-DC converter designs

Procurement Notes

Verify the specific suffix P8T1G against official ABLIC documentation to confirm the exact tape-and-reel packaging configuration and marking codes. Ensure that the selected variant aligns with the required operating temperature range and electrical characteristics defined in the current datasheet revision before finalizing procurement orders.

Selection Notes

Select this component when a fixed maximum duty ratio of 88% is acceptable for the boost converter topology. Choose the S-8338 series over the S-8337 series if adjustable duty cycle control is not required. Consider the 1.8 V minimum operating voltage for compatibility with single-cell lithium-ion battery applications or other low-voltage sources.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8338 series is distinguished by its fixed maximum duty ratio, whereas the S-8337 series allows for adjustable duty ratios via an external resistor. Both series share similar core architectures including UVLO and short-circuit protection mechanisms.

Replacement Considerations

Direct replacements within the same family include S-8338ABEA-P8T1G and S-8338ABAA-P8T1G. Verify pin compatibility and electrical specifications before substitution. Cross-series replacement with S-8337 models requires design adjustments due to differences in duty ratio control capabilities.