S-8337ACHA-T8T1G

Overview

The S-8337ACHA-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 on the ROSC pin. Maximum duty ratio is adjustable through an external resistor connected to 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 circuit, oscillator, error amplifier, PWM controller, UVLO, and short-circuit protection
• Allows external adjustment of oscillation frequency up to 1.133 MHz via the ROSC pin
• Enables customizable maximum duty ratio through the RDuty pin connection
• Supports stability tuning via phase compensation and gain adjustment on the CC pin

Applications

• Power supply for LCD modules
• Portable systems operating on low voltage
• Step-up DC-DC converter designs requiring adjustable frequency

Procurement Notes

Verify the specific suffix T8T1G corresponds to the TSSOP-8 reel packaging configuration. Confirm RoHS compliance status through official documentation. Check for any design-in restrictions or obsolescence notices from ABLIC before finalizing procurement plans.

Selection Notes

Select this component when a low minimum operating voltage of 1.8 V is required. Choose based on the need for externally programmable switching frequency and duty cycle limits. Ensure the application benefits from the integrated short-circuit protection and UVLO features for system reliability.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. The series is designed for applications requiring efficient power conversion in compact portable devices. The S-8337 variant specifically offers user-adjustable duty ratios, distinguishing it from the fixed-duty S-8338 series.

Replacement Considerations

S-8337ABEC-T8T1G

FAQ

How is the switching frequency determined?

The internal oscillation frequency is set by connecting a resistor to the ROSC pin, allowing frequencies 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.