S-8338ABHA-T8T1G

Overview

The S-8338ABHA-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 supports a maximum oscillation frequency of 1.133 MHz via an external resistor on the ROSC pin. The device features a fixed maximum duty ratio of 88% and utilizes pulse width modulation (PWM) control. It includes an under-voltage lockout circuit and a timer latch short-circuit protection circuit. The component is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient power management.
• Features low minimum operating voltage suitable for portable systems and LCD power supplies.
• Includes built-in under-voltage lockout and timer latch short-circuit protection circuits.

Applications

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

Procurement Notes

Verify the specific suffix 'ABHA' against the official ABLIC datasheet to confirm output configuration and enable logic levels. Ensure the ordering code matches the required TSSOP-8 packaging and reel quantity specifications. Confirm RoHS compliance status through the manufacturer's environmental declaration before procurement.

Selection Notes

Select this controller when a fixed maximum duty ratio is acceptable for the boost application. The internal oscillator frequency must be set using an external resistor connected to the ROSC pin. Phase compensation requires external resistors and capacitors connected to the CC pin to ensure stability and transient response.

Part Context

This component 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, unlike the S-8337 series which allows adjustable duty ratios via an external resistor. Both series share similar internal architectures and protection features.

Replacement Considerations

The S-8337 series serves as a functional alternative if adjustable maximum duty ratio is required instead of the fixed 88% limit. Verify pin compatibility and external component values when substituting between the S-8337 and S-8338 families.