S-8337ABHB-P8T1G

Overview

The S-8337ABHB-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 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 configured using external 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.
• Supports high-frequency operation with internal oscillation frequency adjustable up to 1.133 MHz.
• Allows user-defined maximum duty ratio control via external resistance.
• Enables stability optimization through external phase compensation and gain adjustment.

Applications

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

Procurement Notes

Verify the specific suffix P8T1G corresponds to the 8-SON package variant rather than the TSSOP configuration found in other series members. Confirm RoHS compliance status and REACH restrictions directly with the manufacturer or authorized distributors. Ensure ordering quantities align with standard reel packaging requirements specified in the official documentation.

Selection Notes

Select this component when designing boost converters requiring low minimum operating voltage down to 1.8 V. Choose based on the need for adjustable switching frequency and duty cycle limits via external resistors. Consider the 8-SON package dimensions for space-constrained portable applications. Evaluate thermal performance and transient response requirements against the datasheet specifications.

Part Context

This part belongs to the S-8337/8338 series of high-frequency PWM control switching regulator controllers. The series is designed for CMOS step-up applications, distinguishing itself from the S-8338 which has a fixed maximum duty ratio. The S-8337 variants offer flexibility in duty cycle and frequency settings, catering to diverse power management needs in low-voltage environments.

Replacement Considerations

S-8337AAEB-P8T1G

FAQ

How is the switching frequency determined?

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

What protection features are included?

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