S-8337ABEB-T8T1G

Overview

The S-8337ABEB-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 components on the CC pin. The device is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection
• Supports low-voltage operation starting at 1.8 V for portable applications
• Allows external adjustment of switching frequency up to 1.133 MHz
• Enables customizable maximum duty ratio via external resistance

Applications

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

Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout and electrical characteristics. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Ensure the ordering quantity aligns with manufacturer reel specifications. Check for any product change notifications that may affect material composition or marking.

Selection Notes

Select this component when designing boost converters requiring high-frequency operation and low input voltage capability. The adjustable duty ratio and frequency allow optimization for specific inductor values and output requirements. Consider the thermal performance of the TSSOP-8 package for the intended power dissipation levels.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for efficiency in compact power management solutions. The S-8337 variant specifically offers user-configurable duty ratios, distinguishing it from fixed-ratio counterparts.

Replacement Considerations

S-8337ABBA-T8T1G

FAQ

How is the switching 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 circuit (UVLO) and a timer latch short-circuit protection circuit.