S-8338AABA-P8T1G

Overview

The S-8338AABA-P8T1G is a CMOS step-up switching regulator controller from the S-8338 series by ABLIC Inc. It operates within an input voltage range of 1.8 V to 6 V and utilizes pulse width modulation (PWM) control. The internal oscillation frequency is adjustable up to 1.134 MHz via an external resistor on the ROSC pin. The device features a fixed maximum duty ratio of 88.5% and includes under-voltage lockout (UVLO) and timer latch short-circuit protection circuits. It is housed in an 8-SON package with dimensions of 2.9 mm x 2.8 mm.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Features timer latch short-circuit protection circuit to enhance system reliability.
• Allows adjustment of phase compensation and gain via external components connected to the CC pin.

Applications

• Power supply units for LCD displays
• 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(A) package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation or recent product change notifications. Ensure the ordering quantity aligns with the manufacturer's standard packaging requirements. Cross-reference the full part number against the latest datasheet revision to confirm availability and design recommendations.

Selection Notes

Select this component for applications requiring a wide input voltage range starting at 1.8 V. The fixed 88.5% duty ratio distinguishes it from the S-8337 series, which allows variable duty ratio control. Designers must account for the adjustable switching frequency limit of 1.134 MHz when selecting external inductors and capacitors. Verify that the required output voltage can be achieved within the fixed duty cycle constraints using external setting resistors.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8338 variant specifically provides a fixed maximum duty ratio, unlike the S-8337 series which offers adjustable duty ratios. Both series share similar core architectures including UVLO and short-circuit protection, targeting low-voltage portable applications.

Replacement Considerations

S-8338ABEA-P8T1G

FAQ

How is the switching frequency determined?

The internal oscillation frequency is set externally by connecting a resistor to the ROSC pin, allowing frequencies up to 1.134 MHz.

What protection mechanisms are included?

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

Can the maximum duty ratio be adjusted?

No, the S-8338 series has a fixed maximum duty ratio of 88.5%, whereas the S-8337 series allows adjustment via an external resistor.