The AMS4154 is a 2A step-down converter for high voltage applications. Current mode operation provides easier compensation and fast transient response. Internal cycle-by-cycle current limiting and thermal shutdown provides the necessary protection in faults situation. A 5V reference voltage is available that can supply up to 2mA current. Available in 8-pin SOIC EDP package.
The AMS4154 is a 2 A output PWM buck converter designed for high‑voltage applications such as portable computers, industrial power supplies, and automotive electronics. It offers a wide input voltage range of 5.5 V to 32 V, fixed 330 kHz switching frequency, and features like thermal shutdown, cycle‑by‑cycle over‑current protection, under‑voltage lockout, and a 5 V reference output.
The datasheet provides pin descriptions, absolute maximum ratings, electrical characteristics, typical application circuits, performance graphs, and package dimensions for the 8‑lead SOIC EDP package. It also includes layout recommendations and detailed specifications such as current limit, EN threshold voltages, and efficiency values.
| Output Current | 2 A |
|---|---|
| Input Voltage Range | 5.5 V to 32 V |
| Switching Frequency | 330 kHz |
| Thermal Shutdown Temperature | 160 °C |
| Current Limit (max) | 3.9 A |
| EN Enable Threshold (ON) | 2.5 V to 2.8 V |
| EN Disable Threshold (OFF) | 2.2 V to 2.3 V |
| 5 V Reference Output Current | up to 2 mA |
| Operating Temperature Range | -25 °C to 125 °C |
| Package Type | 8‑lead SOIC EDP |
The absolute maximum input voltage rating is –0.3 V to +34 V.
The 5 V reference can supply up to about 2 mA for external circuits.
The converter operates at a fixed switching frequency of 330 kHz.