S-8338AAFB-P8T1G

Overview

The S-8338AAFB-P8T1G is a CMOS step-up switching regulator controller from ABLIC Inc., designed for portable systems and LCD power supplies. It operates within an input voltage range of 1.8 V to 6 V, with a nominal input of 3.3 V. The device utilizes pulse width modulation (PWM) control mode and supports an internal oscillation frequency adjustable up to 1.133 MHz via an external resistor on the ROSC pin. It features a maximum duty ratio of 88.5% and includes under-voltage lockout (UVLO) and timer latch short-circuit protection circuits. The component is housed in an 8-SON package measuring 2.9x2.8 mm.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection.
• Supports low-voltage operation starting at 1.8 V for portable applications.
• Allows flexible frequency setting up to 1.133 MHz using an external resistor.

Applications

• Power supply for LCD panels
• Portable electronic systems operating on low voltage
• DC-DC step-up converter designs

Procurement Notes

Verify the specific suffix P8T1G confirms the 8-SON package and reel packaging configuration. Confirm RoHS compliance status through official documentation. Check for any obsolescence notices or design-in restrictions as some variants may be marked not recommended for new designs. Ensure the manufacturer is identified as ABLIC Inc. when sourcing.

Selection Notes

Select this controller for applications requiring a compact footprint and low minimum operating voltage. The 8-SON package suits space-constrained designs. Verify that the required switching frequency can be achieved with available external resistors. Ensure the load current requirements are met by the external MOSFET selection, as this is a controller without an integrated switch.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. The series is characterized by its CMOS technology and ability to operate from low input voltages. The S-8338 variant specifically offers a higher maximum duty ratio compared to the S-8337 series, allowing for greater step-up ratios in boost converter topologies.

Replacement Considerations

Cross-reference with other S-8338 series variants such as S-8338ABEB-T8T1G or S-8338AADB-P8T1G if package compatibility differs. Verify functional equivalence regarding control mode and protection features before substitution.

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 (UVLO) circuit and a timer latch short-circuit protection circuit.