S-8337ACGA-T8T1G

Overview

The S-8337ACGA-T8T1G is a CMOS step-up switching regulator controller from the S-8337 series by ABLIC Inc. It operates with a supply voltage range of 1.8 V to 6 V and features an internal oscillator frequency adjustable up to 1.133 MHz via an external resistor. The device utilizes pulse width modulation (PWM) control, with a maximum duty ratio configurable through an external resistor connected to the RDuty pin. It includes an under-voltage lockout circuit and timer latch short-circuit protection. The component is housed in an 8-pin TSSOP package.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection circuits.
• Supports low-voltage operation starting at 1.8 V for portable systems.
• Allows external adjustment of oscillation frequency and maximum PWM duty ratio.

Applications

• Power supply for LCD panels
• Portable electronic systems operating on low voltage

Procurement Notes

Verify the specific suffix 'ACGA' against official ABLIC documentation to confirm exact electrical characteristics and availability status. Datasheets may indicate that certain variants are not recommended for new designs due to minimum order quantity restrictions or obsolescence. Confirm RoHS compliance and moisture sensitivity levels prior to integration.

Selection Notes

Select this controller when designing boost converters requiring low input voltage capability and adjustable switching frequencies. Ensure external components match the required frequency and duty cycle settings defined by the ROSC and RDuty pins. Verify thermal performance within the -40°C to 85°C operating range for the target application environment.

Part Context

This part belongs to the S-8337/8338 Series, which are high-frequency PWM control switching regulator controllers. The S-8337 variant specifically allows user-defined maximum duty ratios, distinguishing it from the S-8338 series where the duty ratio is fixed. Both share similar internal architectures optimized for efficiency in compact power management solutions.

Replacement Considerations

S-8337ABEC-T8T1G

FAQ

How is the switching frequency determined?

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

What protection features are included?

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