This document describes a continuous (more than 5A pulsed) step-down switching regulator with synchronous rectification. Its features include: 4A output current (more than 5A pulsed), operating input voltage from 2.9V to 18V, external 1.8V ± 2% reference voltage, output voltage from 0.6V to input voltage, MLCC compatible, 200ns TON, programmable UVLO matching 3.3V, 5V and 12V bus, FSW programmable up to 1MHz, voltage feed-forward, zero-load current operation, programmable current limit on both switches, programmable sink current capability, pre-bias start up capability, thermal shutdown, etc.
The L5988D is a monolithic step-down power switching regulator capable of delivering a continuous output current of 4 A (more than 5 A pulsed) with an operating input voltage range of 2.9 V to 18 V. It features a 100% duty cycle operation thanks to an embedded high-side PMOS switch and includes a programmable switching frequency up to 1 MHz.
| Output current | 4 A continuous (more than 5 A pulsed) |
|---|---|
| Operating input voltage | 2.9 V to 18 V |
| Reference voltage | 1.8 V ± 2% |
| Output voltage range | 0.6 V to input voltage |
| Switching frequency | 100 kHz to 1 MHz |
| Minimum on time | 200 ns |
| Thermal resistance (junction to ambient) | 40 °C/W |
The internal switching frequency is adjustable and can be set continuously from 100 kHz to 1 MHz.
Yes, the device is capable of 100% duty cycle operation due to the embedded high-side PMOS switch.
The programmable UVLO matches 3.3 V, 5 V, and 12 V bus voltages.