S-8338ABBA-T8T1G

Overview

The S-8338ABBA-T8T1G 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 with a maximum internal oscillation frequency of 1.133 MHz. The device features a fixed maximum duty ratio of 88% and includes under-voltage lockout (UVLO) and timer latch short-circuit protection circuits. It is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Includes under-voltage lockout circuitry to ensure stable operation during low input conditions.
• Features timer latch short-circuit protection to safeguard against output faults.

Applications

• Power supply for LCD panels
• Portable systems operating on low voltage

Procurement Notes

Verify the specific suffix codes against the official datasheet to confirm pin compatibility and electrical characteristics. Ensure the ordering quantity aligns with manufacturer packaging standards. Confirm RoHS compliance status through current documentation before finalizing procurement.

Selection Notes

Select this component when a high-frequency boost controller with a fixed duty cycle is required. The 1.133 MHz switching frequency allows for smaller external passive components compared to lower-frequency alternatives. Verify that the load requirements do not exceed the controller's drive capabilities.

Part Context

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

Replacement Considerations

S-8338ABEB-T8T1G

FAQ

How is the switching frequency determined?

The internal oscillation frequency can be set up to 1.133 MHz via a resistor connected to the ROSC pin.

What protection mechanisms are included?

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