S-8337ABGA-T8T1G

Overview

The S-8337ABGA-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 connected to the ROSC pin. The maximum duty ratio is configurable through an external resistor on the RDuty pin. Phase compensation and gain are adjusted using components connected to the CC pin. The device is housed in an 8-pin TSSOP package.

Feature Summary

• Features a low minimum operating voltage of 1.8 V suitable for portable systems
• Includes timer latch short-circuit protection circuit
• Allows external adjustment of oscillation frequency and PWM duty ratio
• Integrates under voltage lockout (UVLO) functionality

Applications

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

Procurement Notes

Verify the specific suffix T8T1G corresponds to the TSSOP-8 reel packaging configuration. Confirm RoHS compliance status as detailed in the official datasheet. Ensure the ordering quantity aligns with the manufacturer's standard factory pack quantity requirements. Cross-reference the part number against the latest product change notifications to verify material specifications.

Selection Notes

Select this component when designing boost converters requiring a wide input voltage range starting at 1.8 V. The adjustable frequency allows optimization for external component size versus efficiency trade-offs. The external duty ratio control provides flexibility for varying output voltage requirements. Ensure thermal management supports the -40°C to 85°C operating temperature range.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8337 variant specifically offers externally adjustable maximum duty ratios, distinguishing it from the fixed-duty S-8338 series. Both series share the same core architecture including reference voltage circuits, error amplifiers, and UVLO blocks.

Replacement Considerations

S-8337AAEA-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 circuit (UVLO) and a timer latch short-circuit protection circuit.