The LA4538M is a monolithic linear IC that integrates a ripple‑filter‑provided stereo power amplifier for 1.5 V headphone applications. It offers low current dissipation, on‑chip power‑switch and muting functions, and requires a minimal number of external components.
The document lists electrical ratings, typical performance figures such as 8 mW output power and 46 dB ripple rejection, and includes a block diagram and sample application circuit. Legal notices clarify that the device is not intended for safety‑critical uses.
| Output Power (typ) | 8 mW |
|---|---|
| Ripple Rejection (amp section, typ) | 46 dB |
| Maximum Output Current | 5.0 mA |
| Allowable Power Dissipation | 300 mW |
| Operating Voltage Range | 0.9 V – 4.0 V |
| Recommended Load Resistance | 16 Ω – 32 Ω |
| Quiescent Current (typ) | 7.0 mA |
| Voltage Gain (typ) | 27.5 dB |
| Total Harmonic Distortion (typ) | 9 % |
The LA4538M delivers a typical output power of 8 mW at VCC = 1.5 V, 160 Ω load, 1 kHz, with 10 % THD.
The recommended operating voltage range is 0.9 V to 4.0 V.
A load resistance between 16 Ω and 32 Ω is recommended.