S-8338ABHC-T8T1G

Overview

The S-8338ABHC-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 device supports an internal oscillation frequency adjustable up to 1.133 MHz via an external resistor on the ROSC pin. It features a fixed maximum duty ratio of 88% and includes under-voltage lockout (UVLO) and timer latch short-circuit protection circuits for enhanced reliability.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller in a single CMOS chip
• Provides timer latch short-circuit protection circuit for robust operation
• Allows phase compensation and gain adjustment through external RC components
• Supports low minimum operating voltage suitable for portable systems

Applications

• Power supply for LCD panels
• Portable electronic systems requiring low voltage operation
• Step-up DC-DC converter designs
• Battery-powered devices with voltage boosting requirements

Procurement Notes

Verify the specific suffix codes against official ABLIC documentation to confirm exact electrical characteristics and package variations. Ensure compatibility with required input voltage ranges and switching frequencies before integration. Cross-reference datasheet revisions to account for potential design or material changes affecting performance specifications.

Selection Notes

Select this component when a high-frequency step-up controller with fixed duty cycle limits is required. Consider the S-8337 series if variable maximum duty ratio control via external resistors is necessary instead of the fixed 88% limit found in the S-8338 series. Evaluate thermal management requirements based on the TSSOP-8 package constraints.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for applications needing efficient power conversion at frequencies up to 1.2 MHz. The S-8338 variant specifically distinguishes itself with a fixed maximum duty ratio, simplifying design calculations compared to the adjustable duty ratio options available in the S-8337 series.

Replacement Considerations

S-8338ABEC-T8T1G

FAQ

How is the oscillation frequency determined?

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 (UVLO) circuit and a timer latch short-circuit protection circuit.