S-8337AAHB-P8T1G

Overview

The S-8337AAHB-P8T1G 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 supports an internal oscillation frequency up to 1.133 MHz via an external resistor. The device utilizes pulse-width modulation (PWM) control with a maximum duty ratio adjustable through an external resistor connected to the RDuty pin. Phase compensation and gain are configurable using external components on the CC pin. It features under-voltage lockout and timer latch short-circuit protection, packaged in an 8-SON format.

Feature Summary

• Integrates reference voltage, oscillator, error amplifier, and PWM controller for efficient step-up regulation
• Supports low-voltage operation starting at 1.8 V suitable for portable systems
• Includes under-voltage lockout and timer latch short-circuit protection circuits

Applications

• Power supply for LCD modules
• Portable electronic systems operating on low voltage
• General step-up DC-DC conversion applications

Procurement Notes

Verify the specific suffix P8T1G corresponds to the 8-SON package configuration rather than TSSOP variants. Confirm RoHS compliance status as some older revisions may differ. Check for obsolescence notices since similar family members are marked not recommended for new designs. Ensure ordering quantities align with manufacturer standard packaging requirements.

Selection Notes

Select this component when designing boost converters requiring adjustable switching frequencies up to 1.133 MHz. Choose based on the need for external duty cycle and phase compensation tuning. Consider the 1.8 V minimum input voltage requirement for battery-powered applications. Compare against the S-8338 series if fixed maximum duty ratios are acceptable instead of adjustable ones.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series distinguishes itself by allowing external adjustment of both oscillation frequency and maximum duty ratio, unlike the S-8338 which has a fixed duty ratio. It is designed for compact power management solutions in space-constrained portable devices.

Replacement Considerations

S-8337AAGB-T8T1G

FAQ

How is the maximum duty ratio controlled in the S-8337AAHB?

The maximum duty ratio is controlled by the value of the external resistor connected to the RDuty pin.

What protection features are included in this controller?

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