S-8337ABDC-T8T1G

Overview

The S-8337ABDC-T8T1G is a CMOS step-up switching regulator controller from the S-8337 series, manufactured by ABLIC Inc. It operates within an input voltage range of 1.8 V to 6 V and supports a switching frequency adjustable up to 1.134 MHz via an external resistor on the ROSC pin. The device utilizes pulse width modulation (PWM) control with a maximum duty ratio configurable through the RDuty pin. It features an internal oscillator, error amplifier, under voltage lockout circuit, and timer latch short-circuit protection. The component is housed in an 8-TSSOP package.

Feature Summary

• Integrates UVLO and timer latch short-circuit protection for enhanced system reliability.
• Allows flexible configuration of oscillation frequency and maximum PWM duty ratio via external components.
• Supports low-voltage operation starting at 1.8 V, suitable for portable applications.

Applications

• Power supply circuits for LCD displays
• Portable electronic systems operating on low voltage
• Step-up DC-DC converter designs

Procurement Notes

Verify the specific suffix codes against the official datasheet to ensure correct output configuration and package type. Confirm RoHS compliance status and check for any product change notifications or obsolescence notices prior to procurement. Ensure ordering quantities align with manufacturer standard packaging requirements.

Selection Notes

Select this controller when designing boost converters requiring adjustable switching frequencies up to 1.2 MHz and customizable duty cycles. It is appropriate for applications needing low minimum operating voltage and integrated protection features. Compare with the S-8338 series if fixed maximum duty ratios are acceptable instead of adjustable ones.

Part Context

This component belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for CMOS technology, offering compact solutions for power management in space-constrained portable devices. The S-8337 variant specifically provides user-adjustable parameters for frequency and duty cycle, distinguishing it from fixed-parameter alternatives.

Replacement Considerations

S-8337AAEB-T8T1G

FAQ

How is the switching frequency adjusted?

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

What protection circuits are included?

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