S-8337ABBB-T8T1G

Overview

The S-8337ABBB-T8T1G is a CMOS step-up switching regulator controller from the S-8337 series, manufactured by ABLIC Inc. It operates within a supply 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 maximum duty ratio is configurable through an external resistor connected to the RDuty pin. Phase compensation and gain are adjusted using external components on the CC pin. The device includes under-voltage lockout and timer latch short-circuit protection circuits.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection.
• Supports high-frequency operation with adjustable internal oscillation up to 1.133 MHz.
• Allows user-defined maximum duty ratio via external resistor connection.
• Enables stability tuning through external phase compensation and gain adjustment components.

Applications

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

Procurement Notes

Verify the specific suffix codes against the official datasheet to confirm electrical parameters such as output configuration and frequency settings. Ensure the TSSOP-8 package matches the target PCB footprint. Confirm RoHS compliance status if required by project specifications. Check for any product change notifications that may affect material composition or manufacturing location.

Selection Notes

Select this component when a low minimum operating voltage of 1.8 V is required for portable applications. Choose based on the need for adjustable switching frequency and customizable duty cycle limits. Consider the TSSOP-8 package size for space-constrained designs. Verify compatibility with external inductor and capacitor values for the desired boost topology.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8337 variant specifically features a user-adjustable maximum duty ratio, distinguishing it from the S-8338 series which has a fixed duty ratio. Both series share similar internal architectures including UVLO and short-circuit protection mechanisms.

Replacement Considerations

S-8337ABEC-T8T1G

FAQ

How is the switching frequency determined?

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

What protection features are included?

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