S-8337AABC-P8T1G

Overview

The S-8337AABC-P8T1G is a CMOS step-up switching regulator controller from the S-8337 series, manufactured by ABLIC Inc. It operates with a minimum input voltage of 1.8 V and supports an internal oscillation frequency adjustable up to 1.133 MHz via an external resistor on the ROSC pin. The device utilizes pulse width modulation (PWM) control with a maximum duty ratio configurable through an external resistor on the RDuty pin. Phase compensation and gain are adjustable using components connected to the CC pin. It features under-voltage lockout and timer latch short-circuit protection, packaged in an 8-SON format.

Feature Summary

• Supports low-voltage operation starting at 1.8 V for portable applications
• Features adjustable PWM maximum duty ratio via external resistor
• Includes timer latch short-circuit protection circuit
• Allows phase compensation adjustment for stability

Applications

• Power supply for LCD panels
• Portable electronic systems operating on low voltage
• Step-up DC-DC converter designs requiring high-frequency operation

Procurement Notes

Verify the specific suffix P8T1G corresponds to the 8-SON package configuration rather than TSSOP variants within the same series. Confirm RoHS compliance status and check for any recent Product Change Notifications regarding material or marking updates before finalizing procurement orders.

Selection Notes

Select this component when designing boost converters requiring a wide range of adjustable switching frequencies up to 1.2 MHz. Ensure external components for the ROSC, RDuty, and CC pins are chosen to meet specific duty cycle and stability requirements. Consider the 1.8 V minimum operating voltage constraint for input source compatibility.

Part Context

This part belongs to the S-8337/8338 Series of high-frequency PWM control switching regulator controllers. While the S-8338 variant features a fixed maximum duty ratio, the S-8337 series allows for flexible duty ratio control. This specific model represents the standard S-8337 functionality housed in a compact surface-mount package suitable for space-constrained portable devices.

Replacement Considerations

S-8337AAEB-P8T1G

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 mechanisms are included?

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