S-8338ACAB-T8T1G

Overview

The S-8338ACAB-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 reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation.
• Supports low minimum operating voltage of 1.8 V suitable for portable systems.
• Includes built-in under-voltage lockout and short-circuit protection mechanisms.

Applications

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

Procurement Notes

Verify the specific suffix codes against the manufacturer datasheet to confirm package type and tape/reel specifications. Ensure compatibility with the required switching frequency settings and duty ratio constraints. Confirm RoHS compliance status through official documentation before integration into designs.

Selection Notes

Select this component when designing boost converters requiring high-frequency operation up to 1.2 MHz. Consider the fixed 88% duty ratio limitation compared to the S-8337 series if variable duty control is needed. Verify that the external component values align with the specified UVLO and protection thresholds.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8338 variant distinguishes itself with a fixed maximum duty ratio, whereas the S-8337 allows adjustment via an external resistor. Both share similar core architectures and protection features.

Replacement Considerations

S-8338ABEC-T8T1G

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.