S-8337AAHA-T8T1G

Overview

The S-8337AAHA-T8T1G 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 connected to the ROSC pin. Maximum duty ratio control is adjustable through a resistor on the RDuty pin. Phase compensation and gain are configurable using components on the CC pin. It 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.
• Allows external setting of oscillation frequency up to 1.133 MHz via the ROSC pin.
• Enables adjustment of maximum PWM duty ratio through the RDuty pin.
• Supports customizable phase compensation and gain via the CC pin for stability.

Applications

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

Procurement Notes

Verify the specific suffix T8T1G indicates the TSSOP-8 reel packaging configuration. Confirm RoHS compliance status through official documentation. Check for current design recommendations as some S-8337 variants may be marked not recommended for new designs due to minimum order quantity constraints or lifecycle status.

Selection Notes

Select this component when a boost controller with externally adjustable switching frequency and duty cycle is required. Ensure the application demands an input voltage starting at 1.8 V. Verify that external passive components can support the desired oscillation frequency and phase compensation requirements defined by the ROSC, RDuty, and CC pins.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. Unlike the S-8338 variant which has a fixed maximum duty ratio, the S-8337 series provides flexibility through external pin configurations for frequency and duty cycle control, catering to diverse power conversion needs in compact electronic devices.

Replacement Considerations

S-8337ABEC-T8T1G: Similar boost controller with adjustable frequency and duty cycle in TSSOP-8.

FAQ

How is the switching frequency determined?

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

What protection features are included?

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