S-8338AAAB-T8T1G

Overview

The S-8338AAAB-T8T1G is a CMOS step-up switching regulator controller from the S-8338 series, manufactured 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. This specific variant features a fixed maximum duty ratio of 88%. It is housed in an 8-pin TSSOP package and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates a reference voltage circuit, oscillator, error amplifier, PWM controller, UVLO, and timer latch short-circuit protection.
• Supports low-voltage operation starting at 1.8 V, suitable for portable systems.
• Features a fixed maximum duty ratio of 88% for simplified design.
• Allows phase compensation and gain adjustment through external components.

Applications

• Power supply for LCD modules
• Portable electronic systems requiring low voltage operation
• Step-up DC-DC converter designs

Procurement Notes

Verify the exact suffix against official ABLIC documentation to confirm package type and electrical tolerances. Confirm RoHS compliance status and check for any product change notifications regarding material composition or manufacturing location updates prior to finalizing procurement orders.

Selection Notes

Select this component when a fixed 88% duty ratio is required rather than the adjustable ratio found in the S-8337 series. Ensure the application requires an external MOSFET as this is a controller only. Verify that the desired switching frequency can be achieved with available external resistors connected to the ROSC pin.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8338 series is distinguished by its fixed maximum duty ratio, whereas the S-8337 series allows duty ratio adjustment via an external resistor. Both share similar internal architectures and low-voltage capabilities.

Replacement Considerations

S-8338ABEB-T8T1G: Same series, TSSOP-8 package, fixed duty ratio.

FAQ

How is the switching frequency determined?

The internal oscillation frequency is set by connecting a resistor to the ROSC pin, allowing frequencies up to 1.133 MHz.

What distinguishes the S-8338 series from the S-8337 series?

The S-8338 series has a fixed maximum duty ratio of 88%, while the S-8337 series allows the maximum duty ratio to be controlled by an external resistor.