LA4537M-TE-L-E

Audio Amplifiers Overview

The LA4537M is a monolithic linear integrated circuit power amplifier designed for 1.5V headphone stereos. It operates within a supply voltage range of 0.9 to 4.0 V and delivers output power up to 8 mW into a 16 Ω load at 1.5 V with 10% THD. The device features low quiescent current, reaching as low as 1.0 µA in standby mode when pin 1 is grounded. It provides a typical voltage gain of 30 dB and includes an on-chip power switch and muting function.

Audio Amplifiers Feature Summary

• Low current drain capability with ultra-low standby consumption
• On-chip power switch and muting functions for system control
• Excellent power supply ripple rejection characteristics
• Minimal external component requirements without input or feedback capacitors

Audio Amplifiers Applications

• 1.5V headphone stereo amplifiers
• Portable audio equipment
• Battery-powered consumer electronics

Audio Amplifiers Procurement Notes

Verify the manufacturer designation, as the part was originally produced by SANYO Semiconductor Co., Ltd. before its acquisition by onsemi. Confirm the package type matches the required PCB footprint. Ensure the operating temperature range meets the specific environmental conditions of the end application.

Audio Amplifiers Selection Notes

Select this component for applications requiring minimal external parts and low power consumption. It is suitable for single-supply operation down to 0.9 V. Consider the 16 Ω load drive capability and the specific voltage gain requirements. Verify that the maximum supply voltage rating aligns with the system's power source.

Audio Amplifiers Part Context

This device belongs to the class of low-voltage audio power amplifiers intended for portable consumer electronics. It integrates both left and right channel amplification along with control logic into a single chip. The design focuses on reducing board space and simplifying the circuit layout by eliminating the need for coupling capacitors.

Audio Amplifiers Replacement Considerations

Consult official cross-reference lists from onsemi for verified substitutes. Ensure any replacement maintains compatibility with the 1.5V supply voltage and similar pin configuration.

Audio Amplifiers FAQ

What is the minimum supply voltage for operation?

The recommended operating voltage range is 0.9 V to 4.0 V.

Does the device require external input capacitors?

No, the LA4537M requires no input capacitor or feedback capacitor.

How is the standby current controlled?

Standby current can be reduced to 1.0 µA by grounding pin 1.