S-8338AABA-T8T1G

Overview

The S-8338AABA-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. The internal oscillation frequency is adjustable up to 1.133 MHz via an external resistor on the ROSC pin. 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 a reference voltage circuit, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Features a low minimum operating voltage of 1.8 V suitable for portable systems.
• Includes built-in under-voltage lockout and timer latch short-circuit protection mechanisms.

Applications

• Power supply for LCD displays
• Portable electronic systems requiring low voltage operation

Procurement Notes

Verify the specific suffix 'AABA' against official ABLIC documentation to confirm exact electrical tolerances and marking codes. Confirm the TSSOP-8 package variant matches design requirements. Check for any product change notifications or end-of-life status updates directly from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when a fixed 88% maximum duty ratio is required, distinguishing it from the S-8337 series which allows variable duty ratio adjustment. Ensure the application benefits from the high-frequency operation capability up to 1.133 MHz for smaller passive component sizes. Verify that the 1.8 V to 6 V input range aligns with the system power source.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8338 series is characterized by its fixed maximum duty ratio, contrasting with the S-8337 series. Both series share similar internal architectures including UVLO and short-circuit protection, designed for low-voltage portable applications.

FAQ

How is the oscillation frequency adjusted?

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

What protection features are included?

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