S-8337ABBA-P8T1G

Overview

The S-8337ABBA-P8T1G 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 utilizes pulse width modulation (PWM) control. The device features an internal oscillator with a frequency settable up to 1.133 MHz via an external resistor on the ROSC pin. It is housed in an 8-pin SON package (2.9x2.8 mm). Key integrated circuits include a reference voltage source, error amplifier, under-voltage lockout (UVLO), and a timer latch short-circuit protection circuit.

Feature Summary

• Integrates a timer latch short-circuit protection circuit for enhanced reliability
• Features adjustable maximum duty ratio controlled by an external resistor
• Supports phase compensation and gain adjustment via external components

Applications

• Power supply for LCD modules
• Portable systems operating on low voltage sources

Procurement Notes

Verify the specific suffix P8T1G corresponds to the 8-SON package variant rather than TSSOP. Confirm RoHS compliance status through official documentation as some SON variants may differ. Ensure the ordering suffix accurately reflects the required packaging format before procurement.

Selection Notes

Select this component when a compact footprint is required due to its small SON package size. Choose this model over the S-8338 series if external adjustment of the maximum PWM duty ratio is necessary for the application design.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The S-8337 variant specifically allows for user-defined maximum duty ratios, distinguishing it from the fixed-duty S-8338 series. Both share similar core architectures but differ in configuration flexibility.

Replacement Considerations

S-8337AAGB-T8T1G: Alternative version in TSSOP-8 package.

FAQ

How is the oscillation frequency determined?

The internal oscillation frequency is set up to 1.133 MHz via a resistor connected to the ROSC pin.

What distinguishes the S-8337 from the S-8338 series?

The S-8337 series allows the maximum duty ratio to be controlled by an external resistor, whereas the S-8338 series has a fixed maximum duty ratio.